PT6303A [TI]
3 Amp Adjustable Positive Step-down Integrated Switching Regulators; 3安培可调正降压型集成开关稳压器型号: | PT6303A |
厂家: | TEXAS INSTRUMENTS |
描述: | 3 Amp Adjustable Positive Step-down Integrated Switching Regulators |
文件: | 总6页 (文件大小:168K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
PT6300 Series
3 Amp Adjustable Positive Step-down
Integrated Sw itching Regulators
SLTS031B
(Revised 9/30/2000)
•
•
•
•
•
•
•
90% Efficiency
Switching Regulators (ISRs) designed
to meet the on-board power conversion
needs of battery powered or other
equipment requiring high efficiency and
small size. This high performance ISR
family offers a unique combination of
features combining 90% typical effi-
ciency with open-collector on/off
control and adjustable output voltage.
Quiescent current in the shutdown
mode is typically less than 100µA.
Adjustable Output Voltage
Internal Short Circuit Protection
Over-Temperature Protection
On/Off Control (Ground Off)
Small SIP Footprint
Wide Input Range
The PT6300 Series is a line of
High-Performance 3 Amp, 12-Pin SIP
(Single In-line Package) Integrated
Pin-Out Information
Ordering Information
PT6302¨ = +5 Volts
PT6303¨ = +3.3 Volts
PT6304¨ = +12 Volts
PT6314¨ = +1.5Volts
PT Series Suffix
Case/Pin
Configuration
(PT1234X)
Pin Function
Inhibit
1
(30V max)
Vertical Through-Hole
N
A
C
2
Vin
Standard Application
Horizontal Through-Hole
Horizontal Surface Mount
3
Vin
VOADJ
12
4
Vin
VIN
VOUT
2,3,4
1
9,10,11
C2
5
GND
GND
GND
GND
Vout
PT6300
6
7
Pkg Style 200
5,6,7,8
+
C1
INH
Q1
8
9
COM
COM
C1 = Optional 1µF ceramic
C2 = Required 100µF electrolytic
Q1 = NFET
10
11
12
Vout
Vout
Vout Adj (5)
(1)
Specifications
PT6300 SERIES
Characteristics
(Ta=25
°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Short Circuit Current
Io
Isc
Vin
Over Vin range
Vin = Vo + 5V
0.1 ≤ Io ≤ 3.0 A
0.1 (2)
—
—
5.0
3.0
—
A
Apk
Input Voltage Range
(Note: inhibit function cannot
be used above 30V.)
Vo = 12V
Vo = 5.0V
Vo = 3.3V
Vo = 1.5V
16
9
—
—
—
—
30/38 (3)
(3)
30/38
V
9
26
17
9.0
Output Voltage Tolerance
∆Vo
Over Vin Range, Io = 3.0 A
Ta = 0°C to +60°C
—
1.0
2.0
%Vo
Line Regulation
Load Regulation
Vo Ripple/Noise
Regline
Regload
Vn
Over Vin range
0.1 ≤ Io ≤ 3.0 A
—
—
—
0.25
0.25
2
0.5
0.5
—
%Vo
%Vo
%Vo
Vin = Vin min, Io = 3.0 A
Transient Response
with Co = 100µF
ttr
50% load change
—
—
100
200
—
µSec
%Vo
Vos
Vo over/undershoot
5.0
Efficiency
η
Vin=16V, Io = 0.5 A,
Vin=9V, Io = 0.5 A,
Vin=9V, Io = 0.5 A,
Vin=9V, Io =0.5A,
Vo = 12V
Vo = 5.0V
Vo = 3.3V
Vo = 1.5V
—
—
—
—
91
89
84
72
—
—
—
—
%
Switching Frequency
ƒo
Over Vin and Io ranges,
Vo = 12V
Vo = 3.3V/5V
Vo = 1.5V
600
400
350
750
500
450
900
600
550
kHz
Shutdown Current
Quiescent Current
Isc
Inl
Vin = 15V
Io = 0A, Vin =10V
—
—
100
10
—
—
µA
mA
(4)
Absolute Maximum
Operating Temperature Range
Ta
Over Vin range
-40
—
+85
°C
Thermal Resistance
Storage Temperature
Mechanical Shock
θja
Free Air Convection (40-60LFM)
—
—
30
—
—
°C/W
Ts
-40
+125
—
°C
Per Mil-STD-883D, Method 2002.3, 1 msec,
Half Sine, mounted to a fixture
—
500
G’s
Mechanical Vibration
Weight
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz,Soldered in a PC board
—
—
—
10
—
—
G’s
—
6.5
grams
Notes: (1) The PT6300 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.
(2) The ISR will operate to no load with reduced specifications.
(3) Input voltage cannot exceed 30V when the inhibit function is used.
(4) See Thermal Derating charts.
(5) Consult the related application note for guidance on adjusting the output voltage.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Typical Characteristics
PT6300 Series
3 Amp Adjustable Positive Step-down
Integrated Sw itching Regulators
PT6303, 3.3 VDC (See Note A)
PT6302, 5.0 VDC (See Note A)
PT6304, 12.0 VDC (See Note A)
Efficiency vs Output Current
Efficiency vs Output Current
Efficiency vs Output Current
100
100
90
80
70
60
50
40
100
90
90
Vin
80
9.0V
Vin
9.0V
Vin
80
12.0V
16.0V
15.0V
70
12.0V
15.0V
24.0V
30.0V
38.0V
20.0V
24.0V
30.0V
38.0V
20.0V
70
60
50
40
26.0V
60
50
40
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Ripple vs Output Current
Ripple vs Output Current
Ripple vs Output Current
160
140
120
100
80
180
160
140
120
100
80
350
300
250
200
150
100
50
Vin
V
38.0V
30.0V
24.0V
15.0V
12.0V
9.0V
Vin
38.0V
Vin
26.0V
20.0V
15.0V
12.0V
9.0V
30.0V
24.0V
20.0V
16.0V
60
60
40
40
20
20
0
0
0
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Thermal Derating (Ta)
(See Note B)
Thermal Derating (Ta)
(See Note B)
Thermal Derating (Ta)
(See Note B)
3
2.5
2
60°C
3
2.5
2
3
2.5
2
50°C
70°C
40°C
50°C
60°C
60°C
70°C
85°C
70°C
85°C
1.5
1
1.5
1
1.5
1
0.5
0
0.5
0
0.5
0
16
19
22
25
28
31
34
37
9
13
17
21
25
29
33
37
9
11
13
15
17
19
21
23
25
27
Vin-(Volts)
Vin-(Volts)
Vin-(Volts)
Power Dissipation vs Output Current
Power Dissipation vs Output Current
Power Dissipation vs Output Current
3.5
3
3.5
3
4.5
4
3.5
3
Vin
2.5
2
Vin
2.5
2
Vin
38.0V
26.0V
38.0V
30.0V
24.0V
15.0V
12.0V
9.0V
20.0V
15.0V
12.0V
9.0V
2.5
2
30.0V
24.0V
20.0V
16.0V
1.5
1
1.5
1
1.5
1
0.5
0
0.5
0
0.5
0
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Note A: Characteristic data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the ISR
Note B: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application note.)
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes
PT6100/6210/6300 Series
Adjusting the Output Voltage of Power Trends’
Wide Input Range Bus ISRs
Notes:
1. Use only a single 1% resistor in either the (R1) or R2
location. Place the resistor as close to the ISR as possible.
The output voltage of the Power Trends’ Wide Input
Range Series ISRs may be adjusted higher or lower than
the factory trimmed pre-set voltage with the addition of a
single external resistor. Table 1 accordingly gives the
allowable adjustment range for each model for either
series as Va (min) and Va (max).
2. Never connect capacitors from Vo adjust to either GND
or Vout. Any capacitance added to the Vo adjust pin will
affect the stability of the ISR.
3. Adjustments to the output voltage may place additional
limits on the maximum and minimum input voltage for
the part. The revised maximum and minimum input
voltage limits must comply with the following
Adjust Up:
An increase in the output voltage is obtained by
requirements. The limits are model dependant.
adding a resistor R2, between pin 12 (V adjust) and pins 5-8
o
(GND).
PT6216/PT6314:
Adjust Down: Add a resistor (R1), between pin 12 (V adjust)
o
Vin (max) = (10 x Va)V or 17V, whichever is less.
Vin (min) = 9.0V
and pins 9-11(Vout).
Figure 1
All other models:
PT6100/6200/6300
Vin (max) = (8 x Va)V or as specified.
Vin (min) = (Va + 4)V or 9V, whichever is greater.
2,3,4
9,10,11
Vin
Vo
Vin
Vo
GND
5,6,7,8
Vo(adj)
12
(R1)
Adj Down
C1
F Ceramic
(Optional)
C2
100 F
µ
(Req'd)
+
1
µ
R2
Adjust
Up
COM
COM
The values of (R1) [adjust down], and R2 [adjust up], can
also be calculated using the following formulas. Refer to
Figure 1 and Table 2 for both the placement and value of the
required resistor; either (R1) or R2 as appropriate.
Ro (Va – 1.25)
(R1)
R2
=
=
kΩ
kΩ
Vo – Va
1.25 Ro
Va – Vo
Where: Vo = Original output voltage
Va = Adjusted output voltage
Ro = The resistance value fromTable 1
Table 1
ISRADJUSTMENTRANGEANDFORMULAPARAMETERS
1Adc Rated
2Adc Rated
3Adc Rated
PT6102
PT6213
PT6303
PT6101
PT6103
PT6214
PT6304
PT6216
PT6314
PT6212
PT6302
V
(nom)
1.5
1.3
3.3
1.8
5.0
5.0
2.18
8.5
12.0
2.43
o
V (min)
a
1.88
V (max)
a
1.9
6.07
66.5
11.25
150.0
22.12
243.0
R
o
(kΩ
)
8.25
90.9
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes continued
PT6100/6210/6300 Series
Table 2
ISRADJUSTMENTRESISTORVALUES
ISRADJUSTMENTRESISTORVALUES (Cont)
1Adc Rated
2Adc Rated
3Adc Rated
Vo (nom)
PT6102
PT6101
5.0
PT6103
PT6214
PT6304
12.0
1Adc Rated
2Adc Rated
3Adc Rated
Vo (nom)
PT6101
PT6103
PT6214
PT6304
12.0
PT6216
PT6314
1.5
PT6213
PT6303
3.3
PT6212
PT6302
5.0
PT6212
PT6302
5.0
5.0
Va (req.d)
Va (req.d)
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5.0
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
6.0
(2.1kΩ)
6.2
6.4
156.0kΩ
134.0kΩ
117.0kΩ
104.0kΩ
93.8kΩ
85.2kΩ
78.1kΩ
72.1kΩ
67.0kΩ
62.5kΩ
58.6kΩ
55.1kΩ
52.1kΩ
49.3kΩ
46.9kΩ
41.7kΩ
37.5kΩ
34.1kΩ
31.3kΩ
94.7kΩ
81.2kΩ
71.0kΩ
63.1kΩ
56.8kΩ
51.6kΩ
47.3kΩ
43.7kΩ
40.6kΩ
37.9kΩ
35.5kΩ
33.4kΩ
(207.0)kΩ
(223.0)kΩ
(241.0)kΩ
(259.0)kΩ
(279.0)kΩ
(301.0)kΩ
(325.0)kΩ
(351.0)kΩ
(379.0)kΩ
(410.0)kΩ
(444.0)kΩ
(483.0)kΩ
(525.0)kΩ
(573.0)kΩ
(628.0)kΩ
(802.0)kΩ
(1060.0)kΩ
(1500.0)kΩ
(12.4kΩ)
6.6
103.0kΩ
51.6kΩ
34.4kΩ
25.8kΩ
6.8
7.0
(24.4)kΩ
(30.9)kΩ
(38.4)kΩ
(47.1)kΩ
(57.4)kΩ
(69.8)kΩ
(85.0)kΩ
(104.0)kΩ
(128.0)kΩ
(161.0)kΩ
(206.0)kΩ
(274.0kΩ
(388.0)kΩ
(615.0)kΩ
(1300.0)kΩ
(181.0)kΩ
831.0kΩ
416.0kΩ
227.0kΩ
208.0kΩ
166.0kΩ
139.0kΩ
119.0kΩ
104.0kΩ
92.4kΩ
7.2
(31.5)kΩ
(37.5)kΩ
7.4
7.6
(44.0)kΩ
7.8
(50.9)kΩ
(30.8)kΩ
(35.4)kΩ
(40.2)kΩ
(45.5)kΩ
(51.1)kΩ
(57.3)kΩ
(64.0)kΩ
(71.4)kΩ
(79.5)kΩ
(88.5)kΩ
(98.5)kΩ
(57.3)kΩ
(122.0)kΩ
(136.0)kΩ
(153.0)kΩ
(171.0)kΩ
(193.0)kΩ
(219.0)kΩ
(250.0)kΩ
(288.0)kΩ
(335.0)kΩ
(396.0)kΩ
(477.0)kΩ
(591.0)kΩ
(761.0)kΩ
(1050.0)kΩ
(1610.0)kΩ
8.0
(58.3)kΩ
8.2
(66.3)kΩ
8.4
(75.0)kΩ
(32.0)kΩ
(34.9)kΩ
(37.9)kΩ
(40.9)kΩ
(44.1)kΩ
(47.3)kΩ
(50.5)kΩ
(53.8)kΩ
8.6
(84.4)kΩ
8.8
(94.6)kΩ
9.0
(106.0)kΩ
(118.0)kΩ
(131.0)kΩ
(146.0)kΩ
(163.0)kΩ
(110.0)kΩ
(202.0)kΩ
(225.0)kΩ
(252.0)kΩ
(283.0)kΩ
(319.0)kΩ
(361.0)kΩ
(413.0)kΩ
(475.0)kΩ
(533.0)kΩ
(654.0)kΩ
(788.0)kΩ
(975.0)kΩ
(1260.0)kΩ
(1730.0)kΩ
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0
20.5
21.5
21.5
22.0
(60.8)kΩ
(64.3)kΩ
(68.0)kΩ
(71.7)kΩ
(75.6)kΩ
(79.5)kΩ
(83.5)kΩ
(87.7)kΩ
(91.9)kΩ
(96.3)kΩ
(101.0)kΩ
(105.0)kΩ
(110.0)kΩ
(115.0)kΩ
(120.0)kΩ
(125.0)kΩ
(130.0)kΩ
(136.0)kΩ
(141.0)kΩ
(147.0)kΩ
(153.0)kΩ
(159.0)kΩ
(165.0)kΩ
(172.0)kΩ
(178.0)kΩ
(185.0)kΩ
(192.0)kΩ
608.0kΩ
304.0kΩ
203.0kΩ
152.0kΩ
122.0kΩ
101.0kΩ
86.8kΩ
75.9kΩ
67.5kΩ
60.8kΩ
55.2kΩ
50.6kΩ
46.7kΩ
43.4kΩ
40.5kΩ
38.0kΩ
35.7kΩ
33.8kΩ
32.0kΩ
30.4kΩ
83.1kΩ
75.6kΩ
69.3kΩ
63.9kΩ
59.4kΩ
55.4kΩ
52.0kΩ
48.9kΩ
46.2kΩ
1880.0kΩ
937.0kΩ
625.0kΩ
469.0kΩ
375.0kΩ
313.0kΩ
268.0kΩ
234.0kΩ
208.0kΩ
188.0kΩ
1140.0kΩ
568.0kΩ
379.0kΩ
284.0kΩ
227.0kΩ
189.0kΩ
162.0kΩ
142.0kΩ
126.0kΩ
114.0kΩ
43.8kΩ
41.6kΩ
39.6kΩ
37.8kΩ
36.1kΩ
34.6kΩ
33.3kΩ
32.0kΩ
30.8kΩ
R1 = (Blue)
R2 = Black
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes
PT6100/6210/6300 Series
Using the Inhibit Function on Power Trends’
Wide Input Range Bus ISRs
Figure 1
Vin
For applications requiring output voltage On/Off control,
the 12pin ISR products incorporate an inhibit function.
The function has uses in areas such as battery conservation,
power-up sequencing, or any other application where the
regulated output from the module is required to be
switched off. The On/Off function is provided by the
Pin 1 (Inhibit) control.
PT6100/6210/6300
2,3,4
9,10,11
Vin
Vo
Vout
GND
Vo(adj)
12
Inh*
1
5,6,7,8
+
C1,
(Optional)
1
µF
C2
100
µ
F
Q1
BSS138
The ISR functions normally with Pin 1 open-circuit,
providing a regulated output whenever a valid source
voltage is applied to Vin, (pins 2, 3, & 4). When a low-
level2 ground signal is applied to Pin 1, the regulator
output will be disabled.
Inh
C O M
C O M
Figure 1 shows an application schematic, which details
the typical use of the Inhibit function. Note the discrete
transistor (Q1). The Inhibit control has its own internal
pull-up with a maximum open-circuit voltage of 8.3VDC.
Only devices with a true open-collector or open-drain
output can be used to control this pin. A discrete bipolar
transistor or MOSFET is recommended.
Turn-On Time: The output of the ISR is enabled automatically
when external power is applied to the input. TheInhibit control
pin is pulled high by its internal pull-up resistor. The ISR
produces a fully regulated output voltage within 1-msec of
either the release of the Inhibit control pin, or the application
of power. The actual turn-on time will vary with the input
voltage, output load, and the total amount of capacitance con-
nected to the output Using the circuit of Figure 1, Figure 2
shows the typical rise in output voltage for the PT6101
following the turn-off of Q1 at time t =0. The waveform was
measured with a 9Vdc input voltage, and 5-Ohm resistive load.
Equation 1 may be used to determine the approximate
current drawn by Q1 when the inhibit is active.
Equation 1
Istby
= Vin ÷ 155kΩ
20%
Figure 2
Notes:
6
5
4
3
2
1
0
1. The Inhibit control logic is similar for all Power Trends’
modules, but the flexibility and threshold tolerances will be
different. For specific information on the inhibit function
of other ISR models, consult the applicable application
note.
2. Use only a true open-collector device (preferably a discrete
transistor) for the Inhibit input. Do Not use a pull-up
resistor, or drive the input directly from the output of a
TTL or other logic gate. To disable the output voltage,
the control pin should be pulled low to less than +1.5VDC.
-0.2
0
0.2
0.4
0.6
0.8
1
3. When the Inhibit control pin is active, i.e. pulled low, the
maximum allowed input voltage is limited to +30Vdc.
t (milli-secs)
4. Do not control the Inhibit input with an external DC
voltage. This will lead to erratic operation of the ISR and
may over-stress the regulator.
5. Avoid capacitance greater than 500pF at the Inhibit control
pin. Excessive capacitance at this pin will cause the ISR to
produce a pulse on the output voltage bus at turn-on.
6. Keep the On/Off transition to less than 10µs. This
prevents erratic operation of the ISR, which can cause a
momentary high output voltage.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
Customers are responsible for their applications using TI components.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 2000, Texas Instruments Incorporated
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