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Case/Pin

Order

Package

Configuration Suffix

Code †

Vertical

N

(ENE)

Horizontal

A

(ENF)

SMD

C

(ENG)

† Previously known as package styles

1420 & 1430

(Reference the applicable package code

drawing for the dimensions and PC

board layout)

PT7716—3.3V

20-A Low-Voltage Programmable

Integrated Switching Regulator

SLTS162B

(Revised 6/27/2002)

Features

1.075V to 1.85V (25mV Steps)

Description

The PT7716 Excalibur™ power module

is a 20-A integrated switching regulator

(ISR) housed a 27-pin space-saving copper

package. Operating from a 3.3V-input bus,

the PT7716 produces a tightly regulated

supply voltage that is programmable over

the range, 1.075V to 1.85V. The output

voltage is selected via a 5-bit code. The

code adjusts the output voltage in steps

of 25mV and is VRM 9.0 compatible.

This regulator is ideally suited for

applications that employ microprocessor

and DSP products that require core supply

voltages as low as 1.075V.

The PT7716 includes a Shutdown

control, Differential Remote Sense, and

Short-Circuit Protection.

20A “Current Booster”

Standard Application

= Required 1500µF electrolytic

= Optional 1µH input choke

PT7716

432 1

2 6

20-25

12

5

13-19

27

7-11

L

O

A

D

C

OUT

+

C

IN

+

PROGRAMMING PINS

V

IN

V

OUT

SYNC OUT

GND

REMOTE SENSE ( + )

REMOTE SENSE ( – )

STBY*

VID0

VID1

VID2

VID3

L1

1µH

GND

VID4

6

* For STBY pin: open =output enabled

ground =output disabled.

Pin-Out Information

Pin Function

1

VID0

2

VID1

3

VID2

4

VID3

5STBY *

6

VID4

7Vin

8Vin

9Vin

10

Vin

11

Vin

12

Rem Sense Gnd

13

GND

14

GND

Pin Function

15GND

16

GND

17

GND

18

GND

19

GND

20

Vout

21

Vout

22

Vout

23

Vout

24

Vout

25Vout

26

27

Sync Out

Ordering Information

PT7716

o = 1.075 to 1.85Volts

PT7744

o = 20-A Booster *

* Consult the related application note for

information on current booster operation.