TEXAS INSTRUMENTS PT7600 Technical data

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PT7600

Series

10 AMP PROGRAMMABLE INTEGRATED
SWITCHING REGULATOR

Application Notes

Mechanical Outline

Product Selector Guide

Revised 5/15/98

Standard Application

PROGRAMMING PINS

VID0
VID1
VID2
VID3
VID4

L1

V

IN

1µH

C

SYNC OUT

GND
STBY*

Cin= Required 1200µF electrolytic
C
L1 = Optional 1µH input choke

IN

= Required 1200µF electrolytic

out

234

6

7 - 11

PT7600

13 - 19

27

+

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

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.

The PT7600 is a new series of high-

performance, 10 Amp Integrated Switching

1200µF of output capacitance are required for

proper operation.

Pin-Out Information

Pin Function

1 VID0
2 VID1
3 VID2
4 VID3

REMOTE SENSE (+)

261

20 - 25

12

5

+

C

OUT

REMOTE SENSE (-)

V

OUT

GND

LOAD

5 STBY* - Stand-by
6 VID4
7V

in

8V

in

9V

in

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

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
27 Do not connect

out

Specifications

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

Output Current I

Input Voltage Range V
Output Voltage Tolerance ∆V

Line Regulation Reg
Load Regulation Reg
Vo Ripple/Noise pk-pk V
Transient Response t

with C

= 1200µF V

out

o

in

o

line

load

n

tr

os

Efficiency η V

Switching Frequency ƒ

Absolute Maximum T
Operating Temperature Range

Recommended Operating T
Temperature Range Over V

Storage Temperature T

o

a

a

s

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

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

Ta = +60°C, 200 LFM, pkg N 0.1
Ta = +25°C, natural convection 0.1

0.1A ≤ I

≤ 10A 4.5

o

V

= +5V, Io = 10A

in

0°C ≤ Ta ≤ +55°C

4.5V ≤ V
Vin = +5V, 0.1 ≤ I
V
Io step between 5A and 10A — 100 — µSec

Vo over/undershoot — 200 — mV

4.5V ≤ V

0.1A ≤ I

Forced Air Flow = 200 LFM

≤ 5.5V, I

in

= +5V, Io = 10A — 50 — mV

in

= +5V, Io = 10A Vo = 3.3V — 80 — %

in

in

≤ 10A

o

in and Io

= 10A — ±10 — mV

o

≤ 10A — ±10 — mV

o

V
V
V
V

= 2.9V — 78 — %

o

= 2.5V — 75 — %

o

= 1.8V — 69 — %

o

= 1.5V — 65 — %

o

≤ 5.5V

Ranges

— -40 — +125 °C

1 msec, Half Sine, mounted to a fixture — 500 — 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
*** See SOA curves.

Output Capacitors:

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

Input Filter:

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

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

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

+1.2V, whichever is greater.

out

PT7600 SERIES

*

—10A

*

—10A

**

— 5.5 V

o-0.03 — Vo+0.03 V

V

650 700 750 kHz

0—+85°C

0 — +65*** °C

—10—G’s

36

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

For assistance or to order, call [phone]

SeriesPT7600

Programming Information

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)

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

90

80

70

60

50

40

Ambient Temperature (°C)

30

20

0246810

VID4=1 VID4=0

lout-(Amps)

Ordering Information

❏❏

PT7601

❏ = 1.3 to 3.5 Volts

❏❏

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

PT Series Suffix

Case/Pin
Configuration

Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount

(PT1234X)

N
A
C

CHARACTERISTIC DATA

PT7601, 3.3 VDC See Note 1)

Efficiency vs Output Current

100

Airflow

Nat Conv
60LFM
100LFM
200LFM

90

80

70

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

60

50

40

0246810

Iout-(Amps)

5V to 3.x Converters

DATA SHEETS

5V Bus Products

Vin

4.5V

5.0V

5.5V

Ripple vs Output Current

40

35

30

25

20

15

10

5

0

0246810

Iout-(Amps)

Power Dissipation vs Output Current

9

8

7

6

5

4

3

2

1

0

0246810

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

Iout-(Amps)

Vin

5.5V

5.0V

4.5V

Vin

5.5V

5.0V

4.5V

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

www.powertrends.com

37