PT7741 Datasheet, PDF (1/3 Pages) Texas Instruments – 32 Amp “Current Booster” for PT7775/PT7779 Regulators

PT7741—5V
32 Amp “Current Booster” for
PT7775/PT7779 Regulators
Description
The PT7741 is a high-output 32
Amp “Current Booster” designed to
operate with the PT7775 and
PT7779 regulators. Up to two
PT7741 boosters will operate in
parallel with one regulator, boosting
output current in increments of 32A.
Combinations of one regulator and
PT7741 current boosters can supply
enough power for virtually any mul-
tiple mega-processor application.
SLTS118
(Revised 8/31/2000)
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 PT7741 only operates with
the PT7775 and PT7775 regulators.
It is not a stand-alone product. Please
refer to the appropriate data sheet for
the performance specifications. The
current booster has the same package
options as the companion regulators.
Features
• 32A Current Boost
• Tracks Vo of either a
PT7775 or PT7779
• High Efficiency
• Input Voltage Range:
4.5V to 5.5V
• Synchronized with Regulator
• 27-pin SIP Package
• Run up to 2 in Parallel (96A)
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 Vin
8 Vin
9 Vin
10 V_in
11 Vin
12 Do not connect
13 GND
Pin Function
14 GND
15 GND
16 GND
17 GND
18 GND
19 GND
20 Vout
21 Vout
22 Vout
23 Vout
24 V_out
25 Vout
26 Do not connect
27 Master Sync In
Ordering Information
PT7741t
(For dimensions and PC Board layout,
see Package Styles 1020 and 1030.)
PT Series Suffix
(PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
N
Horizontal Through-Hole A
Horizontal Surface Mount C
Standard Application
PROGRAMMING PINS
VID0
VID1
VID2
VID3
VID4
L1
V _IN
1µH
C _IN
REMOTE SENSE (+)
64321
VID4 - VID0
26
SNS(+)
7-11 _Vin
PT7775/9
Vo ^20-25
Synch
+
STBY Out GND
SNS(-)
+
5 27 13-19 12
C_OUT
GND
STBY*
REMOTE SENSE (–)
V_OUT
LOAD
GND
L1
1µH
7-11
Vin
+
C _IN
27
Synch
In
PT7741
GND
13-19
20-25
Vo
+
C_OUT
External Capacitors: When used with a PT7779, the PT7741 requires a minimum ouput capacitance of 330µF. The maximum allowable output capacitance is
30,000µF. The PT7741 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.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends