Series

Standard Application

Cin = Required 330µF electrolytic (x4)

Cout = Required 330µF electrolytic (x4)

L1

= Required 1µH input choke

15 AMP HIGH-PERFORMANCE

“BIG HAMMER” PROGRAMMABLE ISR

PT7700

Ordering Information

PT7701

❏

❏ = 2 to 3.5 Volts

PT7702

❏

❏ = 1.3 to 2 Volts

Pin-Out Information

Pin

Function

1

VID0

2

VID1

3

VID2

4

VID3

5

STBY* - Stand-by

6

Vin

7

Vin

8

Vin

9

Vin

Pin

Function

10

Vin

11

Vin

12

Remote Sense Gnd

13

GND

14

GND

15

GND

16

GND

17

GND

18

GND

The PT7700 is a new series of high-

performance, 15 Amp Integrated Switching

Regulators (ISRs) housed in a 27-pin SIP

package. The 15A capability allows easy

integration of the latest high-speed, low-

voltage µPs and bus drivers into existing 5V

systems.

The PT7700 series has been designed to

work in parallel with one or more of the

PT7749 - 15A current boosters for

increased Iout in increments of 15A.

Two products are offered in the series

with different output voltage ranges that are

easily programmed with a 4 bit input

Processor. A differential remote sense is

also provided which automatically

compensates for any voltage drop from the

ISR to the load.

An input filter and 1200µF of output

capacitance are required for proper

operation.

PT7700

7 - 11

13 - 19

20 - 25

27

V

IN

GND

+

+

+

1µH

GND

V

OUT

C

OUT

+

C

IN

+

+

+

+

12

26

1

L1

SYNC OUT

LOAD

REMOTE SENSE (+)

REMOTE SENSE (-)

VID0

VID1

VID2

VID3

PROGRAMMING PINS

2

3

4

STBY*

5

Programming Information

PT7701 PT7702

VID3 VID2 VID1 VID0

Vout

Vout

1

1

1

1

2.0V

1.30V

1

1

1

0

2.1V

1.35V

1

1

0

1

2.2V

1.40V

1

1

0

0

2.3V

1.45V

1

0

1

1

2.4V

1.50V

1

0

1

0

2.5V

1.55V

1

0

0

1

2.6V

1.60V

1

0

0

0

2.7V

1.65V

0

1

1

1

2.8V

1.70V

0

1

1

0

2.9V

1.75V

0

1

0

1

3.0V

1.80V

0

1

0

0

3.1V

1.85V

0

0

1

1

3.2V

1.90V

0

0

1

0

3.3V

1.95V

0

0

0

1

3.4V

2.00V

0

0

0

0

3.5V

2.05V

Note:

Logic 0 = Pin 12 (remote sense gnd) potential

Logic 1 = Open circuit (no pull-up resistors)

Pin

Function

19

GND

20

21

22

23

24

25

26

27

Sync Out

Specifications

Characteristics

PT7700 SERIES

(T

Symbols

Conditions

Min

Typ

Max

Units

Output Current

4.5V

ADC

Input Voltage Range

0.1A

—

5.5

VDC

Static Voltage Tolerance

—

VDC

0°C

Line Regulation

4.5V

—

±10

—

mV

Load Regulation

—

±10

—

mV

—

50

—

mV

Transient Response

—

100

—

µSec

—

200

—

mV

Efficiency

η

—

89

—

%

—

87

—

%

—

85

—

%

—

79

—

%

—

77

—

%

Switching Frequency

4.5V

650

700

750

kHz

0.1A

Operating Temperature

Forced Air Flow = 200 LFM

0

—

+55

°C

Storage Temperature

—

-40

—

+125

°C

Weight

—

—

—

TBD

—

grams

Relative Humidity

—

Non-condensing

0

—

95

%

(1) ISR will operate down to no load with reduced specifications Please note that this product is not short-circuit protected.

(2) The PT7700 series can be easily paralleled with one or more of the PT7749 slave modules to provide increased output current in increments of 15A.

Please contact Power Trends for the appropriate application note.

Output Capacitors: The PT7700 series requires A minimum output capacitance of 1200µF for proper operation. To reduce ESR, Power Trends recommends using four 330µF

electrolytic capacitors in parallel.

Input Filter: An input filter is required for all applications. The input inductor must be sized to handle 15ADC with a typical value of 1µH. The input capacitance must be rated

for 14Arms of ripple current. Power Trends recommends using four Sanyo OSCON style capacitors with a 3.5Arms ripple current rating in parallel (p/n 6SA330M).

2V to 3.5V@15A or

1.3V to 2V @ 15A output

4.5V to 5.5V

V = 1.0”(H) x 3”(L) x 0.55”(W)

H = 0.55”(H) x 3”(L) x 1.5”(W)

15A “Current Boosters”

Features

N = Vertical through-hole

A = Horizontal through-hole

C = Horizontal surface-mount

For STBY* pin; open = output enabled; ground = output disabled.

SLTS077

Revised 5/31/00