ADP3110AKRZ [ADI]

Dual Bootstrapped, 12 V MOSFET Driver with Output Disable; 双自举,与输出禁用12 V MOSFET驱动器
ADP3110AKRZ
型号: ADP3110AKRZ
厂家: ADI    ADI
描述:

Dual Bootstrapped, 12 V MOSFET Driver with Output Disable
双自举,与输出禁用12 V MOSFET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16页 (文件大小:314K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
Dual Bootstrapped, 12 V MOSFET  
Driver with Output Disable  
ADP3110A  
FEATURES  
GENERAL DESCRIPTION  
All-in-one synchronous buck driver  
Bootstrapped high-side drive  
One PWM signal generates both drives  
Anticross conduction protection circuitry  
The ADP3110A is a dual, high voltage MOSFET driver  
optimized for driving two N-channel MOSFETs, the two  
switches in a nonisolated synchronous buck power converter.  
Each driver is capable of driving a 3000 pF load with a 25 ns  
propagation delay and a 30 ns transition time. One of the  
drivers can be bootstrapped and is designed to handle the high  
voltage slew rate associated with floating high-side gate drivers.  
The ADP3110A includes overlapping drive protection to  
prevent shoot-through current in the external MOSFETs.  
OD  
for disabling the driver outputs  
Meets CPU VR requirement when used with  
Analog Devices Flex-Mode™1 controller  
APPLICATIONS  
Multiphase desktop CPU supplies  
Single-supply synchronous buck converters  
OD  
The  
pin shuts off both the high-side and the low-side  
MOSFETs to prevent rapid output capacitor discharge during  
system shutdown.  
The ADP3110A is specified over the commercial temperature  
range of 0°C to 85°C and is available in an 8-lead SOIC_N or an  
8-lead LFCSP_VD package.  
1 Flex-Mode™ is protected by U.S. Patent 6683441; other patents pending.  
FUNCTIONAL BLOCK DIAGRAM  
12V  
D1  
VCC  
4
BST  
ADP3110A  
1
8
C
BST2  
C
LATCH  
R1  
BST1  
2
R
G
IN  
DRVH  
R2  
S
Q
Q1  
DELAY  
R
BST  
TO  
INDUCTOR  
SW  
7
CMP  
VCC  
6
CMP  
1V  
DRVL  
PGND  
CONTROL  
LOGIC  
5
6
Q2  
DELAY  
3
OD  
Figure 1.  
Rev. 0  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rights of third parties that may result from its use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2006 Analog Devices, Inc. All rights reserved.  
 
 
ADP3110A  
TABLE OF CONTENTS  
Features .............................................................................................. 1  
Theory of Operation .........................................................................9  
Low-Side Driver ............................................................................9  
High-Side Driver...........................................................................9  
Overlap Protection Circuit...........................................................9  
Application Information................................................................ 10  
Supply Capacitor Selection ....................................................... 10  
Bootstrap Circuit........................................................................ 10  
MOSFET Selection..................................................................... 10  
PC Board Layout Considerations............................................. 11  
Outline Dimensions....................................................................... 13  
Ordering Guide .......................................................................... 13  
Applications....................................................................................... 1  
General Description......................................................................... 1  
Functional Block Diagram .............................................................. 1  
Revision History ............................................................................... 2  
Specifications..................................................................................... 3  
Absolute Maximum Ratings............................................................ 4  
ESD Caution.................................................................................. 4  
Pin Configuration and Function Descriptions............................. 5  
Timing Characteristics..................................................................... 6  
Typical Performance Characteristics ............................................. 7  
REVISION HISTORY  
3/06—Revision 0: Initial Version  
Rev. 0 | Page 2 of 16  
 
ADP3110A  
SPECIFICATIONS  
VCC = 12 V, BST = 4 V to 26 V, TA = 25°C, unless otherwise noted.1  
Table 1.  
Parameter  
Symbol  
Conditions  
Min  
Typ  
Max  
Unit  
DIGITAL INPUTS (PWM, OD)  
Input Voltage High2  
Input Voltage Low2  
2.0  
V
V
μA  
mV  
0.8  
+1  
Input Current2  
−1  
90  
Hysteresis2  
250  
HIGH-SIDE DRIVER  
Output Resistance, Sourcing Current  
Output Resistance, Sinking Current  
Output Resistance, Unbiased  
Transition Times  
BST to SW = 12 V  
BST to SW = 12 V  
BST to SW = 0 V  
BST to SW = 12 V, CLOAD = 3 nF, see Figure 4  
BST to SW = 12 V, CLOAD = 3 nF, see Figure 4  
BST to SW = 12 V, CLOAD = 3 nF, see Figure 4  
BST to SW = 12 V, CLOAD = 3 nF, see Figure 4  
See Figure 3  
2.6  
1.4  
10  
40  
30  
45  
25  
20  
3.4  
1.8  
Ω
Ω
kΩ  
ns  
ns  
ns  
ns  
ns  
trDRVH  
tfDRVH  
tpdhDRVH  
tpdlDRVH  
55  
45  
65  
35  
35  
Propagation Delay Times  
t
pdl  
OD  
See Figure 3  
SW to PGND  
40  
10  
55  
ns  
t
pdh  
OD  
SW Pull-Down Resistance  
LOW-SIDE DRIVER  
kΩ  
Output Resistance, Sourcing Current  
Output Resistance, Sinking Current  
Output Resistance, Unbiased  
Transition Times  
2.5  
1.4  
10  
40  
20  
15  
30  
20  
3.4  
1.8  
Ω
Ω
VCC = PGND  
kΩ  
ns  
ns  
ns  
ns  
ns  
trDRVL  
tfDRVL  
tpdhDRVL  
tpdlDRVL  
CLOAD = 3 nF, see Figure 4  
CLOAD = 3 nF, see Figure 4  
CLOAD = 3 nF, see Figure 4  
CLOAD = 3 nF, see Figure 4  
See Figure 3  
50  
30  
35  
40  
35  
Propagation Delay Times  
t
pdl  
OD  
pdh  
See Figure 3  
110  
190  
ns  
t
OD  
Timeout Delay  
SW = 5 V  
SW = PGND  
110  
95  
190  
150  
ns  
ns  
SUPPLY  
Supply Voltage Range2  
Supply Current2  
UVLO Voltage2  
Hysteresis2  
VCC  
ISYS  
4.15  
1.5  
13.2  
5
3.0  
V
mA  
V
BST = 12 V, IN = 0 V  
VCC rising  
2
350  
mV  
1 All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC) methods.  
2 Specifications apply over the full operating temperature range TA = 0°C to 85°C.  
Rev. 0 | Page 3 of 16  
 
 
ADP3110A  
ABSOLUTE MAXIMUM RATINGS  
Table 2.  
Stresses above those listed under Absolute Maximum Ratings  
may cause permanent damage to the device. This is a stress  
rating only; functional operation of the device at these or any  
other conditions above those indicated in the operational  
section of this specification is not implied. Exposure to absolute  
maximum rating conditions for extended periods may affect  
device reliability.  
Parameter  
Rating  
VCC  
−0.3 V to +15 V  
BST  
DC  
−0.3 V to VCC + 15 V  
−0.3 V to +35 V  
−0.3 V to +15 V  
<200 ns  
BST to SW  
SW  
Unless otherwise specified, all voltages are referenced to PGND.  
DC  
−5 V to +15 V  
−10 V to +25 V  
<200 ns  
DRVH  
DC  
SW − 0.3 V to BST + 0.3 V  
SW − 2 V to BST + 0.3 V  
<200 ns  
DRVL  
DC  
−0.3 V to VCC + 0.3 V  
−2 V to VCC + 0.3 V  
−0.3 V to 6.5 V  
<200 ns  
OD  
IN,  
θJA, SOIC_N  
2-Layer Board  
4-Layer Board  
123°C/W  
90°C/W  
Operating Ambient Temperature  
Range  
0°C to 85°C  
Junction Temperature Range  
Storage Temperature Range  
Lead Temperature  
0°C to 150°C  
−65°C to +150°C  
Soldering (10 sec)  
300°C  
215°C  
260°C  
Vapor Phase (60 sec)  
Infrared (15 sec)  
ESD CAUTION  
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on  
the human body and test equipment and can discharge without detection. Although this product features  
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy  
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance  
degradation or loss of functionality.  
Rev. 0 | Page 4 of 16  
 
ADP3110A  
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS  
BST  
1
2
3
4
8
7
6
5
DRVH  
ADP3110A  
IN  
SW  
OD  
PGND  
DRVL  
TOP VIEW  
(Not to Scale)  
VCC  
Figure 2. Pin Configuration  
Table 3. Pin Function Descriptions  
Pin No. Mnemonic Description  
1
BST  
Upper MOSFET Floating Bootstrap Supply. A capacitor connected between the BST and SW pins holds this  
bootstrapped voltage for the high-side MOSFET while it is switching.  
2
IN  
Logic Level PWM Input. This pin has primary control of the driver outputs. In normal operation, pulling this pin  
low turns on the low-side driver; pulling it high turns on the high-side driver.  
3
4
5
6
7
OD  
Output Disable. When low, this pin disables normal operation, forcing DRVH and DRVL low.  
Input Supply. This pin should be bypassed to PGND with ~1 μF ceramic capacitor.  
Synchronous Rectifier Drive. Output drive for the lower (synchronous rectifier) MOSFET.  
Power Ground. Connect this pin closely to the source of the lower MOSFET.  
Switch Node Connection. This pin is connected to the buck-switching node, close to the upper MOSFET source.  
It is the floating return for the upper MOSFET drive signal. It is also used to monitor the switched voltage to  
prevent the lower MOSFET from turning on until the voltage is below ~1 V.  
VCC  
DRVL  
PGND  
SW  
8
DRVH  
Buck Drive. Output drive for the upper (buck) MOSFET.  
Rev. 0 | Page 5 of 16  
 
ADP3110A  
TIMING CHARACTERISTICS  
Timing is referenced to the 90% and 10% points, unless otherwise noted.  
OD  
tpdlOD  
tpdhOD  
90%  
DRVH  
OR  
DRVL  
10%  
Figure 3. Output Disable Timing Diagram  
IN  
tpdlDRVL  
tfDRVL  
tpdlDRVH  
trDRVL  
DRVL  
tfDRVH  
tpdhDRVH trDRVH  
DRVH-SW  
V
V
TH  
TH  
tpdhDRVL  
SW  
1V  
Figure 4. Timing Diagram  
Rev. 0 | Page 6 of 16  
 
 
 
ADP3110A  
TYPICAL PERFORMANCE CHARACTERISTICS  
24  
22  
20  
18  
16  
14  
V
= 12V  
LOAD  
CC  
IN  
C
= 3nF  
DRVH  
DRVL  
DRVH  
DRVL  
0
25  
50  
75  
100  
125  
5.0  
5.0  
JUNCTION TEMPERATURE (°C)  
Figure 5. DRVH Rise and DRVL Fall Times  
CLOAD = 6 nF for DRVL, CLOAD = 2 nF for DRVH  
Figure 8. DRVH and DRVL Fall Times vs. Temperature  
40  
35  
30  
25  
20  
15  
10  
5
T
V
= 25°C  
= 12V  
A
CC  
DRVH  
IN  
DRVL  
DRVL  
DRVH  
2.0  
2.5  
3.0  
3.5  
4.0  
4.5  
LOAD CAPACITANCE (nF)  
Figure 6. DRVH Fall and DRVL Rise Times  
LOAD = 6 nF for DRVL, CLOAD = 2 nF for DRVH  
Figure 9. DRVH and DRVL Rise Times vs. Load Capacitance  
C
35  
30  
25  
20  
15  
35  
V
T
= 12V  
V
C
= 12V  
= 3nF  
CC  
= 25°C  
CC  
LOAD  
A
30  
25  
20  
15  
10  
5
DRVH  
DRVH  
DRVL  
DRVL  
0
25  
50  
75  
100  
125  
2.0  
2.5  
3.0  
3.5  
4.0  
4.5  
JUNCTION TEMPERATURE (°C)  
LOAD CAPACITANCE (nF)  
Figure 7. DRVH and DRVL Rise Times vs. Temperature  
Figure 10. DRVH and DRVL Fall Times vs. Load Capacitance  
Rev. 0 | Page 7 of 16  
 
ADP3110A  
12  
11  
10  
9
60  
T
C
= 25°C  
A
T
V
C
= 25°C  
A
= 3nF  
LOAD  
= 12V  
CC  
= 3nF  
LOAD  
45  
30  
15  
0
8
7
6
5
4
3
2
1
0
0
1
2
3
4
5
6
7
8
9
10 11 12  
0
200  
400  
600  
800  
1000  
1200  
1400  
V
(V)  
FREQUENCY (kHz)  
CC  
Figure 11. Supply Current vs. Frequency  
Figure 13. DRVL Output Voltage vs. Supply Voltage  
13  
V
= 12V  
CC  
C
= 3nF  
LOAD  
= 250kHz  
f
IN  
12  
11  
10  
9
0
25  
50  
75  
100  
125  
JUNCTION TEMPERATURE (°C)  
Figure 12. Supply Current vs. Temperature  
Rev. 0 | Page 8 of 16  
ADP3110A  
THEORY OF OPERATION  
pulling the gate down to the voltage at the SW pin. When the  
low-side MOSFET, Q2, turns on, the SW pin is pulled to  
ground. This allows the bootstrap capacitor to charge up to VCC  
again.  
The ADP3110A is a dual MOSFET driver optimized for driving  
two N-channel MOSFETs in a synchronous buck converter  
topology. A single PWM input signal is all that is required to  
properly drive the high-side and the low-side MOSFETs. Each  
driver is capable of driving a 3 nF load at speeds up to 500 kHz.  
A functional block diagram of the ADP3110A is shown in  
Figure 1.  
The high-side driver is in phase with the PWM input. When the  
driver is disabled, the high-side gate is held low.  
OVERLAP PROTECTION CIRCUIT  
LOW-SIDE DRIVER  
The overlap protection circuit prevents both of the main power  
switches, Q1 and Q2, from being on at the same time. This  
prevents shoot-through currents from flowing through both  
power switches and the associated losses that can occur during  
their on/off transitions. The overlap protection circuit accom-  
plishes this by adaptively controlling the delay from the Q1  
turn-off to the Q2 turn-on, and by internally setting the delay  
from the Q2 turn-off to the Q1 turn-on.  
The low-side driver is designed to drive a ground referenced  
N-channel MOSFET. The bias to the low-side driver is  
internally connected to the VCC supply and PGND.  
When the ADP3110A is enabled, the driver output is 180° out  
of phase with the PWM input. When the ADP3110A is  
disabled, the low-side gate is held low.  
HIGH-SIDE DRIVER  
To prevent the overlap of the gate drives during the Q1 turn-off  
and the Q2 turn-on, the overlap circuit monitors the voltage at  
the SW pin. When the PWM input signal goes low, Q1 begins  
to turn off (after propagation delay). Before Q2 can turn on, the  
overlap protection circuit makes sure that SW has first gone  
high and then waits for the voltage at the SW pin to fall from  
The high-side driver is designed to drive a floating N-channel  
MOSFET. The bias voltage for the high-side driver is developed  
by an external bootstrap supply circuit that is connected  
between the BST and SW pins.  
The bootstrap circuit comprises Diode D1 and Bootstrap  
Capacitor CBST1. CBST2 and RBST are included to reduce the high-  
side gate drive voltage and limit the switch node slew rate  
(referred to as a Boot-Snap™ circuit, see the Application  
Information section for more details). When the ADP3110A is  
starting up, the SW pin is at ground; therefore, the bootstrap  
capacitor charges up to VCC through D1. When the PWM input  
goes high, the high-side driver begins to turn on the high-side  
MOSFET, Q1, by pulling charge out of CBST1 and CBST2. As Q1  
turns on, the SW pin rises up to VIN and forces the BST pin to  
VIN to 1 V. Once the voltage on the SW pin falls to 1 V, Q2  
begins turn-on. If the SW pin has not gone high first, the Q2  
turn-on is delayed by a fixed 150 ns. By waiting for the voltage  
on the SW pin to reach 1 V or for the fixed delay time, the  
overlap protection circuit ensures that Q1 is off before Q2 turns  
on, regardless of variations in temperature, supply voltage, input  
pulse width, gate charge, and drive current. If SW does not go  
below 1 V after 190 ns, DRVL turns on. This can occur if the  
current flowing in the output inductor is negative and flows  
through the high-side MOSFET body diode.  
VIN + VC(BST). This holds Q1 on because enough gate-to-source  
voltage is provided. To complete the cycle, Q1 is switched off by  
Rev. 0 | Page 9 of 16  
 
ADP3110A  
APPLICATION INFORMATION  
A small signal diode can be used for the bootstrap diode due to  
the ample gate drive voltage supplied by VCC. The bootstrap  
diode must have a minimum 15 V rating to withstand the  
maximum supply voltage. The average forward current can be  
estimated by  
SUPPLY CAPACITOR SELECTION  
For the supply input (VCC) of the ADP3110A, a local bypass  
capacitor is recommended to reduce the noise and to supply  
some of the peak currents that are drawn. Use a 4.7 μF, low ESR  
capacitor. Multilayer ceramic chip (MLCC) capacitors provide  
the best combination of low ESR and small size. Keep the  
ceramic capacitor as close as possible to the ADP3110A.  
(5)  
IF(AVG) = QGATE × fMAX  
where fMAX is the maximum switching frequency of the  
controller.  
BOOTSTRAP CIRCUIT  
The bootstrap circuit uses a charge storage capacitor (CBST1  
)
The peak surge current rating should be calculated by  
and a diode, as shown in Figure 1. These components can be  
selected after the high-side MOSFET is chosen. The bootstrap  
capacitor must have a voltage rating that can handle twice the  
maximum supply voltage. A minimum 50 V rating is recom-  
mended. The capacitor values are determined using the  
following equations:  
VCC VD  
(6)  
I F(PEAK )  
=
RBST  
MOSFET SELECTION  
When interfacing the ADP3110A to external MOSFETs, the  
designer should consider ways to make a robust design that  
minimizes stresses on both the driver and the MOSFETs. These  
stresses include exceeding the short time duration voltage  
ratings on the driver pins as well as the external MOSFET.  
QGATE  
(1)  
CBST1 + CBST 2 = 10×  
VGATE  
CBST1  
VGATE  
(2)  
=
CBST1 + CBST 2 VCC VD  
It is also highly recommended to use the Boot-Snap circuit to  
improve the interaction of the driver with the characteristics of  
the MOSFETs. If a simple bootstrap arrangement is used, make  
sure to include a proper snubber network on the SW node.  
where:  
QGATE is the total gate charge of the high-side MOSFET at VGATE.  
V
GATE is the desired gate drive voltage (usually in the range of  
5 V to 10 V, 7 V being typical).  
High-Side (Control) MOSFETs  
VD is the voltage drop across D1.  
The high-side MOSFET is usually selected to be high speed to  
minimize switching losses (see the ADP3186 or ADP3188 data  
sheets for Flex-Mode controller details). This usually implies a  
low gate resistance and low input capacitance/charge device.  
Yet, a significant source lead inductance can also exist that  
depends mainly on the MOSFET package; it is best to contact  
the MOSFET vendor for this information.  
Rearranging Equation 1 and Equation 2 to solve for CBST1 yields  
QGATE  
(3)  
C BST1 = 10×  
VCC VD  
CBST2 can then be found by rearranging Equation 1  
QGATE  
(4)  
C BST 2 = 10×  
CBST1  
VGATE  
The ADP3110A DRVH output impedance and the input  
resistance of the MOSFETs determine the rate of charge delivery  
to the internal capacitance of the gate. This determines the  
speed at which the MOSFETs turn on and off. However, because  
of potentially large currents flowing in the MOSFETs at the on  
and off times (this current is usually larger at turn-off due to  
ramping up of the output current in the output inductor), the  
source lead inductance generates a significant voltage when the  
high-side MOSFETs switch off. This creates a significant drain-  
source voltage spike across the internal die of the MOSFETs and  
can lead to a catastrophic avalanche. The mechanisms involved  
in this avalanche condition are referenced in literature from the  
MOSFET suppliers.  
For example, an NTD60N02 has a total gate charge of about  
12 nC at VGATE = 7 V. Using VCC = 12 V and VD = 1 V, then  
CBST1 = 12 nF and CBST2 = 6.8 nF. Good quality ceramic  
capacitors should be used.  
RBST is used to limit slew rate and minimize ringing at the switch  
node. It also provides peak current limiting through D1. An  
RBST value of 1.5 Ω to 2.2 Ω is a good choice. The resistor needs  
to handle at least 250 mW due to the peak currents that flow  
through it.  
Rev. 0 | Page 10 of 16  
 
 
 
 
ADP3110A  
to go below one sixth of VCC; then, a delay is added. Due to the  
Miller capacitance and internal delays of the low-side MOSFET  
gate, ensure the Miller-to-input capacitance ratio is low enough,  
and the low-side MOSFET internal delays are not so large as to  
allow accidental turn on of the low-side MOSFET when the  
high-side MOSFET turns on.  
The MOSFET vendor should provide a rating for the maximum  
voltage slew rate at drain current around which this can be  
designed. When this rating is obtained, determine the expected  
maximum current in the MOSFET by  
D
MAX  
(7)  
I
= I (per phase) +  
(
V
V  
)
×
MAX  
DC  
CC  
OUT  
f
× L  
MAX  
OUT  
Contact Sales for an updated list of recommended low-side  
MOSFETs.  
where:  
D
MAX is determined for the VR controller that is used with the  
driver. This current is divided roughly equally between  
MOSFETs if more than one is used (assume a worst-case  
mismatch of 30% for design margin).  
PC BOARD LAYOUT CONSIDERATIONS  
Use the following general guidelines when designing printed  
circuit boards:  
LOUT is the output inductor value.  
Trace out the high current paths and use short, wide  
(>20 mil) traces to make these connections.  
Minimize trace inductance between the DRVH and DRVL  
outputs and the MOSFET gates.  
Connect the PGND pin of the ADP3110A as closely as  
possible to the source of the lower MOSFET.  
Locate the VCC bypass capacitor as closely as possible to the  
VCC and PGND pins.  
When producing the design, there is no exact method for  
calculating the dV/dt due to the parasitic effects in the external  
MOSFETs as well as the PCB. However, it can be measured to  
determine if it is safe. If it appears the dV/dt is too fast, an  
optional gate resistor can be added between DRVH and the  
high-side MOSFETs. This resistor slows down the dV/dt, but it  
also increases the switching losses in the high-side MOSFETs.  
The ADP3110A is optimally designed with an internal drive  
impedance that works with most MOSFETs to switch them  
efficiently, yet minimizes dV/dt. However, some high speed  
MOSFETs can require this external gate resistor, depending on  
the currents being switched in the MOSFET.  
Use vias to other layers, when possible, to maximize  
thermal conduction away from the IC.  
The circuit in Figure 15 shows how four drivers can be  
combined with the ADP3181 to form a total power conversion  
solution for generating VCC(CORE) for an Intel® CPU that is  
VRD 10.x compliant.  
Low-Side (Synchronous) MOSFETs  
The low-side MOSFETs are usually selected to have a low on  
resistance to minimize conduction losses. This usually implies a  
large input gate capacitance and gate charge. The first concern is  
to ensure the power delivery from the ADP3110A DRVL does  
not exceed the thermal rating of the driver (see the ADP3186,  
ADP3188, or ADP3189 data sheets for Flex-Mode controller  
details).  
Figure 14 shows an example of the typical land patterns based  
on the guidelines given previously. For more detailed layout  
guidelines for a complete CPU voltage regulator subsystem,  
refer to the Layout and Component Placement section in the  
ADP3181 data sheet.  
C
BST1  
The next concern for the low-side MOSFETs is to prevent them  
from inadvertently being switched on when the high-side  
MOSFET turns on. This occurs due to the drain gate (Miller  
capacitance, also specified as Crss capacitance) of the MOSFET.  
When the drain of the low-side MOSFET is switched to VCC by  
the high-side turning on (at a rate dV/dt), the internal gate of  
the low-side MOSFET is pulled up by an amount roughly equal  
to VCC × (Crss/Ciss). It is important to make sure this does not put  
the MOSFET into conduction.  
R
C
BST  
BST2  
D1  
Another consideration is the nonoverlap circuitry of the  
ADP3110A that attempts to minimize the nonoverlap period.  
During the state of the high-side turning off to low-side turning  
on, the SW pin and the conditions of SW prior to switching are  
monitored to adequately prevent overlap.  
C
VCC  
Figure 14. External Component Placement Example  
However, during the low-side turn-off to high-side turn-on, the  
SW pin does not contain information for determining the  
proper switching time, so the state of the DRVL pin is monitored  
Rev. 0 | Page 11 of 16  
 
 
ADP3110A  
Figure 15. VRD 10.x Compliant Power Supply Circuit  
Rev. 0 | Page 12 of 16  
 
ADP3110A  
OUTLINE DIMENSIONS  
5.00 (0.1968)  
4.80 (0.1890)  
8
1
5
4
6.20 (0.2440)  
5.80 (0.2284)  
4.00 (0.1574)  
3.80 (0.1497)  
1.27 (0.0500)  
BSC  
0.50 (0.0196)  
0.25 (0.0099)  
× 45°  
1.75 (0.0688)  
1.35 (0.0532)  
0.25 (0.0098)  
0.10 (0.0040)  
8°  
0.51 (0.0201)  
0.31 (0.0122)  
0° 1.27 (0.0500)  
COPLANARITY  
0.10  
0.25 (0.0098)  
0.17 (0.0067)  
SEATING  
PLANE  
0.40 (0.0157)  
COMPLIANT TO JEDEC STANDARDS MS-012-AA  
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS  
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR  
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.  
Figure 16. 8-Lead Standard Small Outline Package [SOIC_N]  
Narrow Body  
(R-8)  
Dimensions shown in millimeters and (inches)  
0.50  
0.40  
0.30  
3.00  
BSC SQ  
0.60 MAX  
8
PIN 1  
INDICATOR  
1
PIN 1  
INDICATOR  
1.89  
1.74  
1.59  
2.75  
BSC SQ  
TOP  
VIEW  
1.50  
REF  
0.50  
BSC  
4
5
1.60  
1.45  
1.30  
0.70 MAX  
0.65TYP  
12° MAX  
0.90 MAX  
0.85 NOM  
0.05 MAX  
0.01 NOM  
SEATING  
PLANE  
0.30  
0.23  
0.18  
0.20 REF  
Figure 17. 8-Lead Lead Frame Chip Scale Package [LFCSP_VD}  
3 mm × 3 mm Body, Very Thin, Dual Lead  
(CP-8-2)  
Dimensions shown in millimeters  
ORDERING GUIDE  
Temperature  
Range  
Package  
Option  
Ordering  
Quantity  
Model  
Package Description  
Branding  
ADP3110AKRZ1  
ADP3110AKRZ-RL1  
ADP3110AJCPZ-RL1  
0°C to 85°C  
0°C to 85°C  
0°C to 85°C  
8-Lead Standard Small Outline Package [SOIC_N]  
8-Lead Standard Small Outline Package [SOIC_N], Reel  
8-Lead Lead Frame Chip Scale Package [LFCSP_VD], Reel CP-8-2  
R-8  
R-8  
98  
2,500  
5,000  
L3E  
1 Z = Pb-free part.  
Rev. 0 | Page 13 of 16  
 
 
ADP3110A  
NOTES  
Rev. 0 | Page 14 of 16  
ADP3110A  
NOTES  
Rev. 0 | Page 15 of 16  
ADP3110A  
NOTES  
©2006 Analog Devices, Inc. All rights reserved. Trademarks and  
registered trademarks are the property of their respective owners.  
D05832-0-3/06(0)  
Rev. 0 | Page 16 of 16  

相关型号:

ADP3110AKRZ-RL

Dual Bootstrapped, 12 V MOSFET Driver with Output Disable
ADI

ADP3110AKRZ-RL

Dual Bootstrapped, 12 V MOSFET Driver with Output Disable
ONSEMI

ADP3110AKRZ-RL

HALF BRDG BASED MOSFET DRIVER, PDSO8, LEAD FREE, SOIC-8
ROCHESTER

ADP3110KRZ

Dual Bootstrapped, 12 V MOSFET Driver with Output Disable
ONSEMI

ADP3110KRZ-RL

Dual Bootstrapped, 12 V MOSFET Driver with Output Disable
ONSEMI

ADP3110KRZ-RL1

Dual Bootstrapped, 12 V MOSFET Driver with Output Disable
ADI

ADP3110KRZ1

Dual Bootstrapped, 12 V MOSFET Driver with Output Disable
ADI

ADP3118

Dual Bootstrapped 12 V MOSFET Driver with Output Disable
ADI

ADP3118

Dual Bootstrapped 12 V MOSFET Driver with Output Disable
ONSEMI

ADP3118JCPZ-RL

Dual Bootstrapped 12 V MOSFET Driver with Output Disable
ONSEMI

ADP3118JRZ

Dual Bootstrapped 12 V MOSFET Driver with Output Disable
ADI

ADP3118JRZ

Dual Bootstrapped 12 V MOSFET Driver with Output Disable
ONSEMI