For technical support and more information, see inside back cover or visit www.ti.com/powertrends

For technical support and more information, see inside back cover or visit www.ti.com/powertrends

For technical support and more information, see inside back cover or visit www.ti.com/powertrends

1

PT8100 Series

Description

The PT8100 Excalibur™ power

modules are a family of high-output,

high-efficiency, fully integrated

switching regulators (ISRs), housed

in a solderable 31-pin space-saving

copper package. Modules are avail-

able for operation from either a 3.3V

or 5V nominal input bus voltage.

Each provides up to 40A of output

current at output voltages as low

as 0.8V. The output voltage is pro-

grammable via a 5-bit input code.

The PT8100 series incorporates

a state-of-the-art, 2-phase, multiple

power path topology. This extends

the output current range while pro-

viding superior transient response

Features

0.8V—2.7V

(VRM Compatible 5-bit Codes)

= Required 1500µF electrolytic input capacitor

= Required 660µF low ESR OS-Con®, or

1,200µF aluminum electrolytic

choke and 100µF electroytic capacitor.

Ordering Information

Output Voltage

Input

Part No.

Progam Range

Bus

PT8101

H =1.300 to 2.70V

5V

PT8102

H =1.075 to 1.85V

5V

PT8103

H =1.075 to 1.85V

3.3V

PT8104

H =1.050 to 1.825V 5V

PT8105

H =0.800 to 1.575V 3.3V

40-A 3.3/5-V Input Programmable

Integrated Switching Regulator

SLTS157A

(Revised 8/23/2002)

PT8100 Series

(Except PT8104)

43

21

31

23–30

6

17–22

12–16

L

O

A

D

C

2

660µF

Required

+

C

1

1,500µF

Required

+

PROGRAMMING PINS

V

IN

V

OUT

GND

REMOTE SENSE

STBY*

VID0

VID1

VID2

VID3

L

1

1µH

GND

VID4

5

VID

Common

11

C

3

100µF

Optional

+

and input current ripple performance.

The modules are designed for high-

end computing and signal processing

applications, both of which demand

high output currents at low supply

voltages.

The modules have a number of

standard features to facilitate system

integration. These include short-

circuit protection, thermal shutdown,

standby (On/Off) control, and an

output remote sense to compensate

for voltage drop between the regu-

lator and the load. In addition, the

voltage programming codes are

compatible with Intel’s® VRM

specifications.

Case/Pin

Order

Package

Configuration

Suffix

Code

Vertical

N

(EKH)

Horizontal

A

(EKF)

SMD

C

(EKG)

(Reference the applicable package code drawing for

the dimensions and PC board layout)