TPS2835PWPRG4 [TI]

SYNCHRONOUS-BUCK MOSFET DRIVERS WITH DEAD-TIME CONTROL; 同步降压MOSFET和死区时间控制驱动器
TPS2835PWPRG4
型号: TPS2835PWPRG4
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

SYNCHRONOUS-BUCK MOSFET DRIVERS WITH DEAD-TIME CONTROL
同步降压MOSFET和死区时间控制驱动器

驱动器 MOSFET驱动器 驱动程序和接口 接口集成电路 光电二极管
文件: 总23页 (文件大小:988K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
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SLVS223B − NOVEMBER 1999 − REVISED AUGUST 2002  
D PACKAGE  
(TOP VIEW)  
D
Floating Bootstrap or Ground-Reference  
High-Side Driver  
D
D
D
D
D
D
D
Adaptive Dead-Time Control  
1
2
3
4
5
6
7
14  
13  
12  
11  
10  
9
ENABLE  
IN  
CROWBAR  
NC  
BOOT  
NC  
HIGHDR  
BOOTLO  
LOWDR  
NC  
50-ns Max Rise/Fall Times With 3.3-nF Load  
2.4-A Typical Output Current  
4.5-V to 15-V Supply Voltage Range  
TTL-Compatible Inputs  
SYNC  
DT  
PGND  
8
V
Internal Schottky Bootstrap Diode  
CC  
SYNC Control for Synchronous or  
Nonsynchronous Operation  
PWP PACKAGE  
(TOP VIEW)  
D
CROWBAR for OVP, Protects Against  
Faulted High-Side Power FETs  
1
2
3
4
5
6
7
14  
13  
12  
11  
10  
9
ENABLE  
IN  
CROWBAR  
NC  
BOOT  
NC  
HIGHDR  
BOOTLO  
LOWDR  
NC  
D
Low Supply Current....3 mA Typical  
D
Ideal for High-Current Single or Multiphase  
Power Supplies  
Thermal  
Pad  
SYNC  
DT  
PGND  
D
D
−40°C to 125°C Operating Virtual Junction  
Temperature Range  
8
V
CC  
Available in SOIC and TSSOP PowerPAD  
Packages  
NC − No internal connection  
description  
The TPS2834 and TPS2835 are MOSFET drivers for synchronous-buck power stages. These devices are ideal  
for designing a high-performance power supply using switching controllers that do not include on-chip MOSFET  
drivers. The drivers are designed to deliver minimum 2-A peak currents into large capacitive loads. The  
high-side driver can be configured as ground-reference or as floating-bootstrap. An adaptive dead-time control  
circuit eliminates shoot-through currents through the main power FETs during switching transitions, and  
provides high efficiency for the buck regulator. The TPS2834 and TPS2835 have additional control functions:  
ENABLE, SYNC, and CROWBAR. Both high-side and low-side drivers are off when ENABLE is low. The driver  
is configured as a nonsynchronous-buck driver disabling the low-side driver when SYNC is low. The CROWBAR  
function turns on the low-side power FET, overriding the IN signal, for overvoltage protection against faulted  
high-side power FETs.  
The TPS2834 has a noninverting input, while the TPS2835 has an inverting input. These drivers are available  
in 14-terminal SOIC and thermally enhanced TSSOP PowerPADpackages and operate over a junction  
temperature range of 40°C to 125°C.  
Related Synchronous MOSFET Drivers  
DEVICE NAME  
TPS2830  
TPS2831  
TPS2832  
TPS2833  
TPS2836  
TPS2837  
ADDITIONAL FEATURES  
INPUTS  
Noninverted  
ENABLE, SYNC, and CROWBAR  
CMOS  
CMOS  
TTL  
Inverted  
Noninverted  
Inverted  
W/O ENABLE, SYNC, and CROWBAR  
W/O ENABLE, SYNC, and CROWBAR  
Noninverted  
Inverted  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PowerPAD is a trademark of Texas Instruments Incorporated.  
ꢀꢧ  
Copyright 2002, Texas Instruments Incorporated  
ꢣ ꢧ ꢤ ꢣꢜ ꢝꢱ ꢟꢞ ꢢ ꢪꢪ ꢨꢢ ꢠ ꢢ ꢡ ꢧ ꢣ ꢧ ꢠ ꢤ ꢬ  
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
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SLVS223B − NOVEMBER 1999 − REVISED AUGUST 2002  
AVAILABLE OPTIONS  
PACKAGED DEVICES  
T
J
SOIC  
(D)  
TSSOP  
(PWP)  
TPS2834D  
TPS2835D  
TPS2834PWP  
TPS2835PWP  
− 40°C to 125°C  
The D and PWP packages are available taped and reeled. Add R  
suffix to device type (e.g., TPS2834DR)  
functional block diagram  
8
V
CC  
14  
BOOT  
1 MΩ  
(TPS2834 Only)  
12  
11  
HIGHDR  
BOOTLO  
250 kΩ  
2
IN  
V
CC  
(TPS2835 Only)  
10  
LOWDR  
PGND  
250 kΩ  
7
6
DT  
1
5
3
ENABLE  
SYNC  
CROWBAR  
2
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SLVS223B − NOVEMBER 1999 − REVISED AUGUST 2002  
Terminal Functions  
TERMINAL  
NAME NO.  
BOOT  
I/O  
DESCRIPTION  
14  
I
Bootstrap terminal. A ceramic capacitor is connected between BOOT and BOOTLO to develop the floating  
bootstrap voltage for the high-side MOSFET. The capacitor value is typically between 0.1 µF and 1 µF.  
BOOTLO  
11  
3
O
I
This terminal connects to the junction of the high-side and low-side MOSFETs.  
CROWBAR  
CROWBAR can to be driven by an external OVP circuit to protect against a short across the high-side  
MOSFET. If CROWBAR is driven low, the low-side driver will be turned on and the high-side driver will be  
turned off, independent of the status of all other control terminals.  
DT  
6
I
I
Dead-time control terminal. Connect DT to the junction of the high-side and low-side MOSFETs.  
If ENABLE is low, both drivers are off.  
ENABLE  
HIGHDR  
IN  
1
12  
O
I
Output drive for the high-side power MOSFET  
2
Input signal to the MOSFET drivers (noninverting input for the TPS2834; inverting input for the TPS2835).  
Output drive for the low-side power MOSFET  
LOWDR  
NC  
10  
O
4, 9, 13  
No internal connection  
PGND  
SYNC  
7
5
Power ground. Connect to the FET power ground.  
I
I
Synchronous rectifier enable terminal. If SYNC is low, the low-side driver is always off; If SYNC is high, the  
low-side driver provides gate drive to the low-side MOSFET.  
V
CC  
8
Input supply. Recommended that a 1-µF capacitor be connected from V to PGND.  
CC  
detailed description  
low-side driver  
The low-side driver is designed to drive low r  
source and sink.  
N-channel MOSFETs. The current rating of the driver is 2 A,  
N-channel MOSFETs. The current rating of the driver is 2 A,  
DS(on)  
high-side driver  
The high-side driver is designed to drive low r  
DS(on)  
source and sink. The high-side driver can be configured as a GND-reference driver or as a floating bootstrap  
driver. The internal bootstrap diode is a Schottky, for improved drive efficiency. The maximum voltage that can  
be applied from BOOT to ground is 30 V.  
dead-time (DT) control  
Dead-time control prevents shoot-through current from flowing through the main power FETs during switching  
transitions by controlling the turnon times of the MOSFET drivers. The high-side driver is not allowed to turn  
on until the gate drive voltage to the low-side FET is low, and the low-side driver is not allowed to turn on until  
the voltage at the junction of the power FETs (Vdrain) is low; the TTL-compatible DT terminal connects to the  
junction of the power FETs.  
ENABLE  
The ENABLE terminal enables the drivers. When enable is low, the output drivers are low. ENABLE is a  
TTL-compatible digital terminal.  
IN  
The IN terminal is a TTL-compatible digital terminal that is the input control signal for the drivers. The TPS2834  
has a noninverting input; the TPS2835 has an inverting input.  
3
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
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SLVS223B − NOVEMBER 1999 − REVISED AUGUST 2002  
detailed description (continued)  
SYNC  
The SYNC terminal controls whether the drivers operate in synchronous or nonsynchronous mode. In  
synchronous mode, the low-side FET is operated as a synchronous rectifier. In nonsynchronous mode, the  
low-side FET is always off. SYNC is a TTL-compatible digital terminal.  
CROWBAR  
The CROWBAR terminal overrides the normal operation of the driver. When CROWBAR is low, the low-side  
FET turns on to act as a clamp, protecting the output voltage of the dc/dc converter against overvoltages due  
to a short across the high-side FET. V should be fused to protect the low-side FET. CROWBAR is a  
IN  
TTL-compatible digital terminal.  
absolute maximum ratings over operating free-air temperature (unless otherwise noted)  
Supply voltage range, V  
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 16 V  
CC  
Input voltage range:BOOT to PGND (high-side driver ON) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 30 V  
BOOTLO to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 16 V  
BOOT to BOOTLO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 16 V  
ENABLE, SYNC, and CROWBAR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 16 V  
IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 16 V  
DT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 30 V  
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table  
Operating virtual junction temperature range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40°C to 125°C  
J
Storage temperature range, T  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C  
stg  
Lead temperature soldering 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . 260°C  
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and  
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not  
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.  
NOTE 1: Unless otherwise specified, all voltages are with respect to PGND.  
DISSIPATION RATING TABLE  
PACKAGE  
T
A
25°C  
DERATING FACTOR  
26.68 mW/°C  
T
A
= 70°C  
T = 85°C  
A
PWP with solder  
2668  
1024  
749  
1467  
563  
1067  
409  
PWP without solder  
10.24 mW/°C  
D
7.49 mW/°C  
412  
300  
JUNCTION-CASE THERMAL RESISTANCE TABLE  
PWP  
Junction-case thermal resistance  
2.07 °C/W  
Test Board Conditions:  
1. Thickness: 0.062I  
2. 3I × 3I (for packages <27 mm long)  
3. 4I × 4I (for packages >27 mm long)  
4. 2-oz copper traces located on the top of the board (0.071 mm thick)  
5. Copper areas located on the top and bottom of the PCB for soldering  
6. Power and ground planes, 1-oz copper (0.036 mm thick)  
7. Thermal vias, 0.33 mm diameter, 1.5 mm pitch  
8. Thermal isolation of power plane  
For more information, refer to TI technical brief literature number SLMA002.  
4
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SLVS223B − NOVEMBER 1999 − REVISED AUGUST 2002  
recommended operating conditions  
MIN NOM  
MAX  
15  
UNIT  
V
Supply voltage, V  
Input voltage  
4.5  
4.5  
CC  
BOOT to PGND  
28  
V
electrical characteristics over recommended operating virtual junction temperature range,  
= 6.5 V, ENABLE = High, C = 3.3 nF (unless otherwise noted)  
V
CC  
L
supply current  
PARAMETER  
Supply voltage range  
TEST CONDITIONS  
MIN  
TYP  
MAX  
15  
UNIT  
V
V
4.5  
V
CC  
V
V
V
= LOW,  
= HIGH,  
= HIGH,  
V
V
V
=15 V  
=15 V  
=12 V,  
100  
400  
(ENABLE)  
(ENABLE)  
(ENABLE)  
CC  
CC  
CC  
µA  
300  
3
Quiescent current  
CC  
f
C
= 200 kHz,  
BOOTLO grounded,  
C = 50 pF,  
(LOWDR)  
(SWX)  
mA  
= 50 pF,  
(HIGHDR)  
See Note 2  
NOTE 2: Ensured by design, not production tested.  
5
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ꢙꢗ ꢀ ꢌ ꢖ ꢕꢚ ꢖꢐ ꢀ ꢗꢓ ꢕ ꢋꢎ ꢊꢀ ꢍꢎ ꢛ  
SLVS223B − NOVEMBER 1999 − REVISED AUGUST 2002  
electrical characteristics over recommended operating virtual junction temperature range,  
= 6.5 V, ENABLE = High, C = 3.3 nF (unless otherwise noted) (continued)  
V
CC  
L
output drivers  
PARAMETER  
TEST CONDITIONS  
MIN  
TYP  
MAX  
UNIT  
V
V
– V  
= 4.5 V,  
= 6.5 V,  
= 12 V,  
= 4.5 V,  
= 6.5 V,  
= 12 V,  
(BOOT)  
(BOOTLO)  
0.7  
1.1  
= 4 V  
(HIGHDR)  
Duty cycle < 2%,  
V
V
– V  
(BOOTLO)  
= 5 V  
(BOOT)  
(HIGHDR)  
1.1  
2
1.5  
2.4  
1.4  
1.6  
2.7  
High-side sink (see Note 3)  
A
t
< 100 µs  
pw  
(see Note 2)  
V
V
– V  
(BOOTLO)  
= 10.5 V  
(BOOT)  
(HIGHDR)  
V
V
– V  
(BOOTLO)  
= 0.5V  
(BOOT)  
(HIGHDR)  
1.2  
1.3  
2.3  
Duty cycle < 2%,  
V
V
– V  
(BOOTLO)  
= 1.5 V  
High-side source  
(see Note 3)  
(BOOT)  
(HIGHDR)  
Peak output  
current  
A
t
< 100 µs  
pw  
(see Note 2)  
V
V
– V  
(BOOTLO)  
= 1.5 V  
(BOOT)  
(HIGHDR)  
V
V
V
V
V
V
= 4.5 V, V  
= 4 V  
1.3  
2
1.8  
2.5  
3.5  
1.7  
2.4  
3
CC  
(LOWDR)  
(LOWDR)  
(LOWDR)  
Duty cycle < 2%,  
= 6.5 V, V  
= 5 V  
t
< 100 µs  
Low-side sink (see Note 3)  
A
A
CC  
CC  
CC  
CC  
CC  
pw  
(see Note 2)  
= 12 V, V  
= 10.5 V  
= 0.5V  
= 1.5 V  
3
= 4.5 V, V  
= 6.5 V, V  
1.4  
2
LOWDR))  
Duty cycle < 2%,  
Low-side source  
(see Note 3)  
t
< 100 µs  
(LOWDR))  
(LOWDR0)  
pw  
(see Note 2)  
= 12 V, V  
= 1.5 V  
2.5  
V
V
– V  
= 4.5 V,  
= 6.5 V,  
= 12 V,  
= 4.5 V,  
= 6.5 V,  
= 12 V,  
(BOOT)  
(BOOTLO)  
5
5
= 0.5 V  
(HIGHDR)  
V
V
– V  
(BOOTLO)  
= 0.5 V  
(BOOT)  
(HIGHDR)  
High-side sink (see Note 3)  
V
V
– V  
(BOOTLO)  
= 0.5 V  
(BOOT)  
(HIGHDR)  
5
V
V
– V  
(BOOTLO)  
= 4 V  
(BOOT)  
(HIGHDR)  
75  
75  
75  
V
V
– V  
(BOOTLO)  
= 6 V  
(BOOT)  
(HIGHDR)  
Output  
resistance  
High-side source (see Note 3)  
V
V
– V  
(BOOTLO)  
=11.5 V  
(BOOT)  
(HIGHDR)  
V
V
V
V
V
V
= 4.5 V, V  
= 0.5 V  
9
7.5  
6
(DRV)  
(DRV)  
(DRV)  
(DRV)  
(DRV)  
(DRV)  
(LOWDR)  
= 6.5 V, V  
= 0.5 V  
= 0.5 V  
= 4 V  
Low-side sink (see Note 3)  
(LOWDR)  
= 12 V, V  
(LOWDR)  
= 4.5 V, V  
= 6.5 V, V  
75  
75  
75  
(LOWDR)  
Low-side source (see Note 3)  
)= 6 V  
(LOWDR  
= 12 V, V  
= 11.5 V  
(LOWDR)  
NOTES: 2: Ensured by design, not production tested.  
3. The pullup/pulldown circuits of the drivers are bipolar and MOSFET transistors in parallel. The peak output current rating is the  
combined current from the bipolar and MOSFET transistors. The output resistance is the r of the MOSFET transistor when  
DS(on)  
the voltage on the driver output is less than the saturation voltage of the bipolar transistor.  
6
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SLVS223B − NOVEMBER 1999 − REVISED AUGUST 2002  
electrical characteristics over recommended operating virtual junction temperature range,  
= 6.5 V, ENABLE = High, C = 3.3 nF (unless otherwise noted) (continued)  
V
CC  
L
dead-time control  
PARAMETER  
High-level input voltage  
TEST CONDITIONS  
MIN  
TYP  
MAX  
UNIT  
V
IH  
V
IL  
V
IH  
V
IL  
0.7V  
CC  
LOWDR  
DT  
Over the V  
range (see Note 2)  
range  
V
CC  
CC  
Low-level input voltage  
High-level input voltage  
Low-level input voltage  
1
1
2
V
V
Over the V  
NOTE 2: Ensured by design, not production tested.  
digital control terminals (IN, CROWBAR, SYNC, ENABLE)  
PARAMETER  
High-level input voltage  
Low-level input voltage  
TEST CONDITIONS  
MIN  
TYP  
MAX  
UNIT  
V
V
V
2
IH  
Over the V  
CC  
range  
1
V
IL  
switching characteristics over recommended operating virtual junction temperature range,  
ENABLE = High, C = 3.3 nF (unless otherwise noted)  
L
PARAMETER  
TEST CONDITIONS  
MIN  
TYP  
MAX  
60  
50  
50  
40  
30  
30  
50  
40  
40  
40  
30  
30  
95  
80  
70  
80  
70  
60  
80  
70  
60  
170  
135  
85  
UNIT  
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
= 4.5 V,  
= 6.5 V,  
= 12 V,  
V
V
V
= 0 V  
= 0 V  
= 0 V  
(BOOT)  
(BOOT)  
(BOOT)  
(BOOTLO)  
(BOOTLO)  
(BOOTLO)  
HIGHDR output (see Note 2)  
ns  
Rise time  
= 4.5 V  
CC  
CC  
CC  
= 6.5 V  
= 12 V  
LOWDR output (see Note 2)  
HIGHDR output (see Note 2)  
LOWDR output (see Note 2)  
ns  
ns  
ns  
ns  
ns  
= 4.5 V,  
= 6.5 V,  
= 12 V,  
V
= 0 V  
= 0 V  
= 0 V  
(BOOT)  
(BOOT)  
(BOOT)  
(BOOTLO)  
(BOOTLO)  
(BOOTLO)  
V
V
Fall time  
= 4.5 V  
CC  
CC  
CC  
= 6.5 V  
= 12 V  
= 4.5 V,  
= 6.5 V,  
= 12 V,  
= 4.5 V,  
= 6.5 V,  
= 12 V,  
V
V
V
V
V
V
= 0 V  
= 0 V  
= 0 V  
= 0 V  
= 0 V  
= 0 V  
(BOOT)  
(BOOT)  
(BOOT)  
(BOOT)  
(BOOT)  
(BOOT)  
(BOOTLO)  
(BOOTLO)  
(BOOTLO)  
(BOOTLO)  
(BOOTLO)  
(BOOTLO)  
HIGHDR going low (excluding  
dead time) (see Note 2)  
Propagation delay time  
LOWDR going high (excluding  
dead time) (see Note 2)  
= 4.5 V  
CC  
CC  
CC  
CC  
CC  
CC  
LOWDR going low (excluding  
dead time) (see Note 2)  
= 6.5 V  
Propagation delay time  
Driver nonoverlap time  
ns  
ns  
= 12 V  
= 4.5 V  
= 6.5 V  
= 12 V  
40  
25  
15  
DT to LOWDR and LOWDR to  
HIGHDR (see Note 2)  
NOTE 2: Ensured by design, not production tested.  
7
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ꢀ ꢁ ꢂ ꢃ ꢄꢅ ꢆ ꢇ ꢀ ꢁꢂ ꢃ ꢄ ꢅ ꢈ  
ꢂ ꢉꢊꢋ ꢌ ꢍ ꢎꢊꢎꢏ ꢂꢐꢑ ꢏꢋꢒ ꢓꢎ ꢂ ꢔꢕ ꢀ ꢖꢍ ꢗ ꢘꢕ ꢍꢂ  
ꢙꢗ ꢀ ꢌ ꢖ ꢕꢚ ꢖꢐ ꢀ ꢗꢓ ꢕ ꢋꢎ ꢊꢀ ꢍꢎ ꢛ  
SLVS223B − NOVEMBER 1999 − REVISED AUGUST 2002  
TYPICAL CHARACTERISTICS  
FALL TIME  
vs  
RISE TIME  
vs  
SUPPLY VOLTAGE  
SUPPLY VOLTAGE  
50  
45  
40  
50  
45  
40  
C
T
= 3.3 nF  
= 25°C  
C
T
= 3.3 nF  
= 25°C  
L
J
L
J
High Side  
Low Side  
35  
30  
35  
30  
High Side  
Low Side  
25  
20  
25  
20  
15  
10  
15  
10  
4
5
6
7
8
9
10 11 12 13 14 15  
4
5
6
7
8
9
10 11 12 13 14 15  
V
CC  
− Supply Voltage − V  
V
CC  
− Supply Voltage − V  
Figure 1  
Figure 2  
RISE TIME  
vs  
JUNCTION TEMPERATURE  
FALL TIME  
vs  
JUNCTION TEMPERATURE  
50  
45  
40  
50  
45  
40  
V
C
= 6.5 V  
= 3.3 nF  
CC  
L
V
C
= 6.5 V  
= 3.3 nF  
CC  
L
High Side  
High Side  
Low Side  
35  
30  
35  
30  
Low Side  
25  
20  
25  
20  
15  
10  
15  
10  
−50  
−25  
0
25  
50  
75  
100  
125  
0
25  
50  
75  
100  
125  
−50  
−25  
T
J
− Junction Temperature − °C  
T
J
− Junction Temperature − °C  
Figure 3  
Figure 4  
8
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
ꢀ ꢁꢂꢃ ꢄ ꢅ ꢆ ꢇ ꢀꢁ ꢂ ꢃꢄ ꢅꢈ  
ꢂꢉ ꢊꢋꢌꢍꢎ ꢊꢎ ꢏꢂ ꢐꢑꢏꢋꢒ ꢓ ꢎꢂ ꢔꢕ ꢀ ꢖ ꢍꢗ ꢘ ꢕꢍ ꢂ  
ꢙ ꢗꢀ ꢌ ꢖꢕꢚ ꢖꢐꢀ ꢗꢓ ꢕ ꢋ ꢎꢊ ꢀꢍ ꢎ ꢛ  
SLVS223B − NOVEMBER 1999 − REVISED AUGUST 2002  
TYPICAL CHARACTERISTICS  
HIGH-TO-LOW PROPAGATION DELAY TIME  
LOW-TO-HIGH PROPAGATION DELAY TIME  
vs  
vs  
SUPPLY VOLTAGE, HIGH TO LOW LEVEL  
SUPPLY VOLTAGE, LOW TO HIGH LEVEL  
150  
150  
140  
130  
C
T
= 3.3 nF  
= 25°C  
C
T
= 3.3 nF  
= 25°C  
L
J
140  
130  
L
J
120  
110  
100  
120  
110  
100  
90  
80  
90  
80  
70  
60  
50  
40  
70  
60  
50  
40  
High Side  
Low Side  
Low Side  
30  
20  
30  
20  
4
5
6
7
8
9
10 11 12 13 14 15  
4
5
6
7
8
9
10 11 12 13 14 15  
V
CC  
− Supply Voltage − V  
V
CC  
− Supply Voltage − V  
Figure 5  
Figure 6  
LOW-TO-HIGH PROPAGATION DELAY TIME  
HIGH-TO-LOW PROPAGATION DELAY TIME  
vs  
vs  
JUNCTION TEMPERATURE  
JUNCTION TEMPERATURE  
150  
150  
140  
130  
V
C
= 6.5 V  
= 3.3 nF  
V
C
= 6.5 V  
140  
130  
CC  
L
CC  
= 3.3 nF  
L
120  
110  
100  
120  
110  
100  
High Side  
90  
80  
90  
80  
High Side  
70  
60  
50  
40  
70  
60  
50  
40  
Low Side  
Low Side  
30  
20  
30  
20  
−50  
−50  
−25  
0
25  
50  
75  
100  
125  
−25  
0
25  
50  
75  
100  
125  
T
J
− Junction Temperature − °C  
T
J
− Junction Temperature − °C  
Figure 7  
Figure 8  
9
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
ꢀ ꢁ ꢂ ꢃ ꢄꢅ ꢆ ꢇ ꢀ ꢁꢂ ꢃ ꢄ ꢅ ꢈ  
ꢂ ꢉꢊꢋ ꢌ ꢍ ꢎꢊꢎꢏ ꢂꢐꢑ ꢏꢋꢒ ꢓꢎ ꢂ ꢔꢕ ꢀ ꢖꢍ ꢗ ꢘꢕ ꢍꢂ  
ꢙꢗ ꢀ ꢌ ꢖ ꢕꢚ ꢖꢐ ꢀ ꢗꢓ ꢕ ꢋꢎ ꢊꢀ ꢍꢎ ꢛ  
SLVS223B − NOVEMBER 1999 − REVISED AUGUST 2002  
TYPICAL CHARACTERISTICS  
DRIVER-OUTPUT FALL TIME  
vs  
DRIVER-OUTPUT RISE TIME  
vs  
LOAD CAPACITANCE  
LOAD CAPACITANCE  
1000  
1000  
V
T
= 6.5 V  
= 25°C  
V
T
= 6.5 V  
CC  
J
CC  
= 25°C  
J
100  
10  
100  
10  
High Side  
Low Side  
High Side  
Low Side  
1
1
0.01  
0.1  
1
10  
100  
0.01  
0.1  
1
10  
100  
C
− Load Capacitance − nF  
C
− Load Capacitance − nF  
L
L
Figure 9  
Figure 10  
SUPPLY CURRENT  
vs  
SUPPLY CURRENT  
vs  
SUPPLY VOLTAGE  
SUPPLY VOLTAGE  
25  
6000  
T
C
= 25°C  
= 50 pF  
T
C
= 25°C  
= 50 pF  
J
L
J
L
5500  
5000  
4500  
4000  
20  
15  
500 kHz  
2 MHz  
300 kHz  
200 kHz  
3500  
3000  
2500  
2000  
1500  
1000  
100 kHz  
50 kHz  
25 kHz  
10  
5
1 MHz  
500  
0
0
4
6
8
10  
12  
14  
16  
4
6
8
10  
12  
14  
16  
V
CC  
− Supply Voltage − V  
V
CC  
− Supply Voltage − V  
Figure 11  
Figure 12  
10  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
ꢀ ꢁꢂꢃ ꢄ ꢅ ꢆ ꢇ ꢀꢁ ꢂ ꢃꢄ ꢅꢈ  
ꢂꢉ ꢊꢋꢌꢍꢎ ꢊꢎ ꢏꢂ ꢐꢑꢏꢋꢒ ꢓ ꢎꢂ ꢔꢕ ꢀ ꢖ ꢍꢗ ꢘ ꢕꢍ ꢂ  
ꢙ ꢗꢀ ꢌ ꢖꢕꢚ ꢖꢐꢀ ꢗꢓ ꢕ ꢋ ꢎꢊ ꢀꢍ ꢎ ꢛ  
SLVS223B − NOVEMBER 1999 − REVISED AUGUST 2002  
TYPICAL CHARACTERISTICS  
PEAK SOURCE CURRENT  
PEAK SINK CURRENT  
vs  
vs  
SUPPLY VOLTAGE  
SUPPLY VOLTAGE  
4
3.5  
3
4
3.5  
3
T
J
= 25°C  
T
J
= 25°C  
Low Side  
Low Side  
2.5  
2
2.5  
2
High Side  
High Side  
1.5  
1
1.5  
1
0.5  
0
0.5  
0
4
6
8
10  
12  
14  
16  
4
6
8
10  
12  
14  
16  
V
CC  
− Supply Voltage − V  
V
CC  
− Supply Voltage − V  
Figure 13  
Figure 14  
INPUT THRESHOLD VOLTAGE  
INPUT THRESHOLD VOLTAGE  
vs  
vs  
SUPPLY VOLTAGE  
JUNCTION TEMPERATURE  
2.0  
1.8  
1.6  
1.4  
1.2  
1.0  
2.0  
1.8  
1.6  
1.4  
1.2  
1.0  
T
J
= 25°C  
V
CC  
= 6.5 V  
4
6
8
10  
12  
14  
16  
−50  
−25  
0
25  
50  
75  
100  
125  
V
CC  
− Supply Voltage − V  
T
J
− Junction Temperature − °C  
Figure 15  
Figure 16  
11  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
ꢀ ꢁ ꢂ ꢃ ꢄꢅ ꢆ ꢇ ꢀ ꢁꢂ ꢃ ꢄ ꢅ ꢈ  
ꢂ ꢉꢊꢋ ꢌ ꢍ ꢎꢊꢎꢏ ꢂꢐꢑ ꢏꢋꢒ ꢓꢎ ꢂ ꢔꢕ ꢀ ꢖꢍ ꢗ ꢘꢕ ꢍꢂ  
ꢙꢗ ꢀ ꢌ ꢖ ꢕꢚ ꢖꢐ ꢀ ꢗꢓ ꢕ ꢋꢎ ꢊꢀ ꢍꢎ ꢛ  
SLVS223B − NOVEMBER 1999 − REVISED AUGUST 2002  
APPLICATION INFORMATION  
Figure 17 shows the circuit schematic of a 100-kHz synchronous-buck converter implemented with a TL5001A  
pulse-width-modulation (PWM) controller and a TPS2835 driver. The converter operates over an input range from  
4.5 V to 12 V and has a 3.3-V output. The circuit can supply 3 A continuous load. The converter achieves an efficiency  
of 94% for V = 5 V, I  
=1 A, and 93% for V = 5 V, I = 3 A.  
IN  
load  
IN load  
V
IN  
+
C10  
C5  
100 µF  
100 µF  
+
C11  
0.47 µF  
U1  
R6  
R5  
R1  
1 kΩ  
TPS2835  
ENABLE  
IN  
1 MΩ  
0 Ω  
1
2
3
4
5
6
7
14  
13  
12  
11  
10  
9
BOOT  
NC  
C15  
1.0 µF  
Q1  
Si4410  
L1  
27 µH  
CROWBAR HIGHDR  
NC  
BOOTLO  
3.3 V  
SYNC  
DT  
LOWDR  
NC  
C13  
R7  
3.3 Ω  
10 µF  
R11  
4.7 Ω  
8
PGND  
V
CC  
C7  
100 µF  
+
C12  
100 µF  
+
Q2  
C14  
Si4410  
C6  
1 µF  
1000 pF  
RTN  
GND  
C8  
0.1 µF  
C3  
0.0022 µF  
U2  
TL5001A  
C2  
0.033 µF  
2
C4  
0.022 µF  
R3  
180 Ω  
V
CC  
COMP  
R2  
1.6 kΩ  
3
1
6
OUT  
DTC  
4
7
FB  
RT  
R4  
2.32 kΩ  
C9  
0.22 µF  
5
SCP  
R8  
121 kΩ  
GND  
8
R9  
90.9 kΩ  
R10  
1.0 kΩ  
C1  
1 µF  
Figure 17. 3.3-V 3-A Synchronous-Buck Converter Circuit  
12  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
ꢀ ꢁꢂꢃ ꢄ ꢅ ꢆ ꢇ ꢀꢁ ꢂ ꢃꢄ ꢅꢈ  
ꢂꢉ ꢊꢋꢌꢍꢎ ꢊꢎ ꢏꢂ ꢐꢑꢏꢋꢒ ꢓ ꢎꢂ ꢔꢕ ꢀ ꢖ ꢍꢗ ꢘ ꢕꢍ ꢂ  
ꢙ ꢗꢀ ꢌ ꢖꢕꢚ ꢖꢐꢀ ꢗꢓ ꢕ ꢋ ꢎꢊ ꢀꢍ ꢎ ꢛ  
SLVS223B − NOVEMBER 1999 − REVISED AUGUST 2002  
APPLICATION INFORMATION  
Great care should be taken when laying out the PC board. The power-processing section is the most critical  
and will generate large amounts of EMI if not properly configured. The junction of Q1, Q2, and L1 should be very  
tight. The connection from Q1 drain to the positive sides of C5, C10, and C11 and the connection from Q2 source  
to the negative sides of C5, C10, and C11 should be as short as possible. The negative terminals of C7 and  
C12 should also be connected to Q2 source.  
Next, the traces from the MOSFET driver to the power switches should be considered. The BOOTLO signal from  
the junction of Q1 and Q2 carries the large gate drive current pulses and should be as heavy as the gate drive  
traces. The bypass capacitor (C14) should be tied directly across V  
and PGND.  
CC  
The next most sensitive node is the FB node on the controller (terminal 4 on the TL5001A). This node is very  
sensitive to noise pickup and should be isolated from the high-current power stage and be as short as possible.  
The ground around the controller and low-level circuitry should be tied to the power ground as the output. If these  
three areas are properly laid out, the rest of the circuit should not have other EMI problems and the power supply  
will be relatively free of noise.  
13  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
PACKAGE OPTION ADDENDUM  
www.ti.com  
11-Apr-2013  
PACKAGING INFORMATION  
Orderable Device  
TPS2834D  
Status Package Type Package Pins Package  
Eco Plan Lead/Ball Finish  
MSL Peak Temp  
Op Temp (°C)  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
Top-Side Markings  
Samples  
Drawing  
Qty  
(1)  
(2)  
(3)  
(4)  
ACTIVE  
SOIC  
SOIC  
D
14  
14  
14  
14  
14  
14  
14  
14  
14  
14  
14  
14  
50  
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-2-260C-1 YEAR  
Level-2-260C-1 YEAR  
2834  
TPS2834DG4  
TPS2834DR  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
D
D
50  
2500  
2500  
90  
Green (RoHS  
& no Sb/Br)  
2834  
SOIC  
Green (RoHS  
& no Sb/Br)  
2834  
TPS2834DRG4  
TPS2834PWP  
TPS2834PWPG4  
TPS2834PWPR  
TPS2834PWPRG4  
TPS2835D  
SOIC  
D
Green (RoHS  
& no Sb/Br)  
2834  
HTSSOP  
HTSSOP  
HTSSOP  
HTSSOP  
SOIC  
PWP  
PWP  
PWP  
PWP  
D
Green (RoHS  
& no Sb/Br)  
TPS2834  
TPS2834  
TPS2834  
TPS2834  
2835  
90  
Green (RoHS  
& no Sb/Br)  
2000  
2000  
50  
Green (RoHS  
& no Sb/Br)  
Green (RoHS  
& no Sb/Br)  
Green (RoHS  
& no Sb/Br)  
TPS2835DG4  
TPS2835PWP  
TPS2835PWPG4  
SOIC  
D
50  
Green (RoHS  
& no Sb/Br)  
2835  
HTSSOP  
HTSSOP  
PWP  
PWP  
90  
Green (RoHS  
& no Sb/Br)  
TPS2835  
TPS2835  
TPS2835  
90  
Green (RoHS  
& no Sb/Br)  
TPS2835PWPR  
OBSOLETE HTSSOP  
OBSOLETE HTSSOP  
PWP  
PWP  
14  
14  
TBD  
TBD  
Call TI  
Call TI  
Call TI  
Call TI  
-40 to 125  
-40 to 125  
TPS2835PWPRG4  
(1) The marketing status values are defined as follows:  
ACTIVE: Product device recommended for new designs.  
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.  
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.  
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.  
OBSOLETE: TI has discontinued the production of the device.  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
11-Apr-2013  
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability  
information and additional product content details.  
TBD: The Pb-Free/Green conversion plan has not been defined.  
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that  
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.  
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between  
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.  
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight  
in homogeneous material)  
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.  
(4)  
Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a  
continuation of the previous line and the two combined represent the entire Top-Side Marking for that device.  
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information  
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and  
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.  
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.  
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.  
Addendum-Page 2  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
26-Jan-2013  
TAPE AND REEL INFORMATION  
*All dimensions are nominal  
Device  
Package Package Pins  
Type Drawing  
SPQ  
Reel  
Reel  
A0  
B0  
K0  
P1  
W
Pin1  
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant  
(mm) W1 (mm)  
TPS2834DR  
SOIC  
D
14  
14  
2500  
2000  
330.0  
330.0  
16.4  
12.4  
6.5  
6.9  
9.0  
5.6  
2.1  
1.6  
8.0  
8.0  
16.0  
12.0  
Q1  
Q1  
TPS2834PWPR  
HTSSOP PWP  
Pack Materials-Page 1  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
26-Jan-2013  
*All dimensions are nominal  
Device  
Package Type Package Drawing Pins  
SPQ  
Length (mm) Width (mm) Height (mm)  
TPS2834DR  
SOIC  
D
14  
14  
2500  
2000  
367.0  
367.0  
367.0  
367.0  
38.0  
35.0  
TPS2834PWPR  
HTSSOP  
PWP  
Pack Materials-Page 2  
IMPORTANT NOTICE  
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