Texas Instruments PT7601N Datasheet

Pin-Out Information

Standard Application

Cin= Required 1200µF electrolytic
C

out

= Required 1200µF electrolytic

L1 = Optional 1µH input choke

PT7600

7 - 11

13 - 19

20 - 25

27

V

IN

GND

1µH

GND

V

OUT

C

OUT

+

C

IN

+

12

261

L1

SYNC OUT

LOAD

REMOTE SENSE (+)

REMOTE SENSE (-)

VID1
VID2
VID3
VID4

PROGRAMMING PINS

234

STBY*

5

6

VID0

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

Series

10 AMP PROGRAMMABLE INTEGRATED
SWITCHING REGULATOR

PT7600

Features

• Single-Device: +5V input

• 5-bit Programmable:

1.3V to 3.5V@10A

• High Efficiency

• Input Voltage Range:

4.5V to 5.5V

• Differential Remote Sense

• 27-pin SIP Package

The PT7600 is a new series of high-

performance, 10 Amp Integrated Switching

Regulators (ISRs) housed in a 27-pin SIP pack­age. The 10A capability allows easy integration of
the latest high-speed, low-voltage µPs and bus
drivers into existing 5V systems.

The output voltage of the PT7600 is easily
programmed with a 5 bit input compatible with
Intel’s Pentium



II Processor from 1.3V to 3.5V.
A differential remote sense is also provided which
automatically compensates for any voltage drop
from the ISR to the load.

1200µF of output capacitance are required for

proper operation.

For assistance or to order, call [phone]

Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 [phone] Fax: [phone] http://www.powertrends.com

36

Pin Function

1 VID0
2 VID1
3 VID2
4 VID3
5 STBY* - Stand-by
6 VID4
7V

in

8V

in

9V

in

Pin Function

10 V

in

11 V

in

12 Remote Sense Gnd
13 GND
14 GND
15 GND
16 GND
17 GND
18 GND

Pin Function

19 GND
20 V

out

21 V

out

22 V

out

23 V

out

24 V

out

25 V

out

26 Remote Sense V

out

27 Do not connect

Specifications

Characteristics

PT7600 SERIES

(Ta = 25°C unless noted) Symbols Conditions Min Typ Max Units

Output Current I

o

Ta = +60°C, 200 LFM, pkg N 0.1

*

—10A

Ta = +25°C, natural convection 0.1

*

—10A

Input Voltage Range V

in

0.1A ≤ I

o

≤ 10A 4.5

**

— 5.5 V

Output Voltage Tolerance ∆V

o

V

in

= +5V, Io = 10A

V

o-0.03 — Vo+0.03 V

0°C ≤ Ta ≤ +55°C

Line Regulation Reg

line

4.5V ≤ V

in

≤ 5.5V, I

o

= 10A — ±10 — mV

Load Regulation Reg

load

Vin = +5V, 0.1 ≤ I

o

≤ 10A — ±10 — mV

Vo Ripple/Noise pk-pk V

n

V

in

= +5V, Io = 10A — 50 — mV

Transient Response t

tr

Io step between 5A and 10A — 100 — µSec

with C

out

= 1200µF V

os

Vo over/undershoot — 200 — mV

Efficiency η V

in

= +5V, Io = 10A Vo = 3.3V — 80 — %

V

o

= 2.9V — 78 — %

V

o

= 2.5V — 75 — %

V

o

= 1.8V — 69 — %

V

o

= 1.5V — 65 — %

Switching Frequency ƒ

o

4.5V ≤ V

in

≤ 5.5V

650 700 750 kHz

0.1A ≤ I

o

≤ 10A

Absolute Maximum T

a

0—+85°C

Operating Temperature Range
Recommended Operating T

a

Forced Air Flow = 200 LFM

0 — +65*** °C

Temperature Range Over V

in and Io

Ranges

Storage Temperature T

s

— -40 — +125 °C

Mechanical Shock Per Mil-STD-883D, Method 2002.3

1 msec, Half Sine, mounted to a fixture — 500 — G’s

Mechanical Vibration Per Mil-STD-883D, Method 2007.2,

—10—G’s

20-2000 Hz, Soldered in a PC board

Weight — Vertical/Horizontal — 31/41 — grams

* ISR-will operate down to no load with reduced specifications. Please note that this product is not short-circuit protected.
** The minimum input voltage is 4.5V or V

out

+1.2V, whichever is greater.

*** See SOA curves.

Output Capacitors:

The PT7600 series requires a minimum output capacitance of 1200µF for proper operation. Do not use Oscon type capacitors.The maximum allowable

output capacitance is 7,500µF. See Capacitor Application Note.

Input Filter:

An input filter is optional for most applications. The input inductor must be sized to handle 10ADC with a typical value of 1µH. The input capacitance must be rated for

a minimum of 1.0 Arms of ripple current. For transient or dynamic load applications, additional capacitance may be required.

Application Notes

Mechanical Outline

Product Selector Guide

Revised 5/15/98

Ordering Information

PT7601

❏❏

❏❏

❏ = 1.3 to 3.5 Volts

Programming Information

VID4=1 VID4=0

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

Logic 0 = Pin 12 (remote sense gnd) potential
Logic 1 = Open circuit (no pull-up resistors)

Note 1: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures.

Safe Operating Area Curve (@Vin=+5V)

lout-(Amps)

Efficiency vs Output Current

Ripple vs Output Current

Power Dissipation vs Output Current

Efficiency - %Ripple-(mV)PD-(Watts)

Iout-(Amps)

Iout-(Amps)

Iout-(Amps)

PT7601, 3.3 VDC See Note 1)

(For dimensions and PC
board layout, see Package
Styles 800 & 810.)

SeriesPT7600

For assistance or to order, call [phone]

Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 [phone] Fax: [phone] http://

www.powertrends.com

37

5V to 3.x Converters

5V Bus Products

DATA SHEETS

CHARACTERISTIC DATA

PT Series Suffix

(PT1234X)

Case/Pin
Configuration

Vertical Through-Hole

N

Horizontal Through-Hole

A

Horizontal Surface Mount

C

Ambient Temperature (°C)

20

30

40

50

60

70

80

90

0246810

Nat Conv
60LFM
100LFM
200LFM

Airflow

40

50

60

70

80

90

100

0246810

4.5V

5.0V

5.5V

Vin

0

5

10

15

20

25

30

35

40

0246810

5.5V

5.0V

4.5V

Vin

0

1

2

3

4

5

6

7

8

9

0246810

5.5V

5.0V

4.5V

Vin