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參數(shù)資料
| 型號(hào)： | PT7742 |
| 英文描述： | Intelligent Power Switch 1 Channel Low Side Driver in a D2-Pak Package |
| 中文描述： | 20安培\u0026#39;當(dāng)前助推器\u0026#39;的PT7708 ISR的 |
| 文件頁(yè)數(shù)： | 1/2頁(yè) |
| 文件大?。?/td> | 129K |
| 代理商： | PT7742 |
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Features
32A Current Boost
Tracks Vo of a PT7778
High Efficiency
Input Voltage Range:
3.1V to 3.6V
Synchronized with PT7778
27-pin SIP Package
Run up to 2 in Parallel (96A)
Description
The PT7740 is a high-output 32
Amp “Current Booster” designed to
operate with the PT7778 regulator.
Up to two PT7740 boosters will
operate in parallel with a PT7778,
boosting output current in increments
of 32A. Combinations of a PT7778
series regulator and PT7740 current
boosters can supply enough power for
virtually any multiple mega-processor
application.
The booster adds a parallel output
stage that is driven directly by the
regulator. Both operate in perfect
sychronization for a low noise solution.
The PT7740 only operates with a
PT7778 regulator and is not a stand-
alone product. Please refer to the
PT7778 data sheet for the perfor-
mance specifications. The current
booster has the same package options
as its companion regulator.
PT7740—3.3V
32 Amp “Current Booster” for
PT7778 Regulator
Ordering Information
PT7740
J
Standard Application
(For dimensions and PC Board layout,
see Package Styles 1020 and 1030.)
Pin-Out Information
Pin Function
1
Do not connect
2
Do not connect
3
Do not connect
4
Do not connect
5
Do not connect
6
Do not connect
7
V
in
8
V
in
9
V
in
10
V
in
11
V
in
12
Do not connect
13
GND
Pin Function
14
GND
15
GND
16
GND
17
GND
18
GND
19
GND
20
V
out
21
V
out
22
V
out
23
V
out
24
V
out
25
V
out
26
Do not connect
27
Master Sync In
C
IN
+
C
OUT
+
LOAD
V
IN
VID0
VID2
V
OUT
GND
GND
STBY*
L1
1μH
REMOTE SENSE (–)
REMOTE SENSE (+)
PROGRAMMING PINS
C
IN
+
L1
1μH
PT7740
20-25
13-19
27
7-11
Vo
Vin
GND
Synch
In
PT7778
4
VID3 - VID0
3
2
1
26
20-25
12
5
13-19
27
7-11
Vo
Vin
GND
SNS(+)
SNS(-)
Synch
Out
STBY
C
OUT
+
PT Series Suffix
(PT1234
X
)
Case/Pin
Configuration
Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount
N
A
C
External Capacitors:
When used with a PT7778, the PT7740 requires a minimum ouput capacitance of 330μF. The maximum allowable output capacitance is
30,000μF. The PT7740 also requires a minimum input capacitance of 2400μF, which must be rated for a minimum of 2.0Arms of ripple current. For transient
or dynamic load applications, additional capacitance may be required. For further information, see the accompanying application note on capacitor selection for this
product.
Input Filter:
An input filter inductor is optional for most applications. The input inductor must be sized to handle 32ADC with a typical value of 1μH.
SLTS117
(Revised 8/31/2000)
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