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PT7745 Datasheet

  • PT7745

  • 20 Amp ＇Current Booster＇ for PT7711 ISR

  • 164.86KB

  • 8頁

  • ETC

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PT7711鈥?V
20-A Programmable
Integrated Switching Regulator
SLTS087A
(Revised 6/27/2002)
Features
鈥?/div>
5V Input Voltage
鈥?/div>
20-A Output Current
鈥?/div>
5-bit Programmable Output:
1.3V to 3.5V
鈥?/div>
High Efficiency (93%)
鈥?/div>
Differential Remote Sense
鈥?/div>
Over-Current Protection
鈥?/div>
27-Pin Space-Saving Package
鈥?/div>
Solderable Copper Case
鈥?/div>
Compatible with PT7745
20A 鈥淐urrent Booster鈥?/div>
Description
The PT7711 Excalibur鈩?power module
is a 20-A integrated switching regula-
tor (ISR) housed a 27-pin space-saving
copper package. Operating from a +5V
input bus, the PT7711 produces a tightly
regulated output voltage that is program-
mable over the range, 1.3V to 3.5V. The
output voltage is selected via 5-bit input
code, which is compatible with the VRM
specifications defined by Intel廬.
This regulator is most suitable for
microprocessor and DSP applications
requiring core or I/O logic supply volt-
ages as low as 1.3V.
The PT7711 regulator incorporates
output short-circuit protection, and a
differential remote sense to compensate
for voltage drop between the regulator
and load.
Ordering Information
PT7711o
= 1.3 to 3.5 Volts
PT7745o
= 20-A Booster *
* Consult the related application note for
information on current booster operation.
Pin-Out Information
Pin Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
VID0
VID1
VID2
VID3
STBY *
VID4
Vin
Vin
Vin
Vin
Vin
Rem Sense Gnd
GND
GND
Pin Function
15
16
17
18
19
20
21
22
23
24
25
26
27
GND
GND
GND
GND
GND
Vout
Vout
Vout
Vout
Vout
Vout
Rem Sense V
out
Sync Out
PT Series Suffix
(PT1234
x
)
Case/Pin
Order
Configuration Suffix
Vertical
Horizontal
SMD
Package
Code 鈥?/div>
(ENE)
(ENF)
(ENG)
N
A
C
鈥?/div>
Previously known as package styles
1420 & 1430
(Reference the applicable package code
drawing for the dimensions and PC
board layout)
For STBY* pin: open =output enabled
ground =output disabled.
Standard Application
VID0
VID1
VID2
VID3
VID4
V
IN
PROGRAMMING PINS
REMOTE SENSE(+)
6 4 3 2 1
26
20-25
L1
7-11
1碌H
+
PT7711
27
5
13-19
12
V
OUT
C
IN
SYNC OUT
GND
STBY*
+
C
OUT
GND
REMOTE SENSE(鈥?
L
O
A
D
C
in
= Required 1500碌F electrolytic
C
out
= Required 330碌F electrolytic
L
1
= Optional 1碌H input choke
For technical support and more information, see inside back cover or visit www.ti.com

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