Application Notes
Mechanical Outline
For assistance or to order, call (800) 531-5782
Product Selector Guide
P T 7 6 0 0 S e r i e s
10 AMP PROGRAMMABLE INTEGRATED
SWITCHING REGULATOR
Revised 5/15/98
Regulators (ISRs) housed in a 27-pin SIP pack-
Features
age. The 10A capability allows easy integration of
the latest high-speed, low-voltage µPs and bus
drivers into existing 5V systems.
• Single-Device: +5V input
• 5-bit Programmable:
1.3V to 3.5V@10A
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.
• High Efficiency
• Input Voltage Range:
4.5V to 5.5V
• Differential Remote Sense
• 27-pin SIP Package
1200µF of output capacitance are required for
proper operation.
The PT7600 is a new series of high-
performance, 10 Amp Integrated Switching
Pin-Out Information
Pin Function
Pin Function
10 Vin
11 Vin
12 Remote Sense Gnd
13 GND
14 GND
15 GND
16 GND
17 GND
18 GND
Pin Function
19 GND
20 Vout
21 Vout
22 Vout
23 Vout
24 Vout
25 Vout
1
2
3
4
5
6
7
8
9
VID0
VID1
VID2
VID3
STBY* - Stand-by
VID4
Vin
Standard Application
PROGRAMMING PINS
VID0
VID1
VID2
VID3
VID4
REMOTE SENSE (+)
6
4
3
2
1
26
L1
VIN
VOUT
7
-
11
20 - 25
PT7600
1µH
27
13
-
19
5
12
+
+
CIN
COUT
LOAD
Vin
Vin
26 Remote Sense V
out
SYNC OUT
GND
GND
27 Do not connect
STBY*
REMOTE SENSE (-)
For STBY* pin; open = output enabled; ground = output
disabled.
C
= Required 1200µF electrolytic
= Required 1200µF electrolytic
in
out
C
L1 = Optional 1µH input choke
Specifications
PT7600 SERIES
Characteristics
(Ta = 25°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Ta = +60°C, 200 LFM, pkg N
Ta = +25°C, natural convection
0.1*
—
—
10
10
A
A
0.1*
Input Voltage Range
Vin
0.1A ≤ Io ≤ 10A
4.5**
—
5.5
V
Output Voltage Tolerance
∆Vo
Vin = +5V, Io = 10A
0°C ≤ Ta ≤ +55°C
Vo-0.03
—
Vo+0.03
V
Line Regulation
Regline
Regload
Vn
4.5V ≤ Vin ≤ 5.5V, Io = 10A
Vin = +5V, 0.1 ≤ Io ≤ 10A
Vin = +5V, Io = 10A
—
—
—
±10
±10
50
—
—
—
mV
mV
mV
Load Regulation
Vo Ripple/Noise pk-pk
Transient Response
with Cout = 1200µF
ttr
Vos
Io step between 5A and 10A
Vo over/undershoot
—
—
100
200
—
—
µSec
mV
Efficiency
η
Vin = +5V, Io = 10A
Vo = 3.3V
Vo = 2.9V
Vo = 2.5V
Vo = 1.8V
Vo = 1.5V
—
—
—
—
—
80
78
75
69
65
—
—
—
—
—
%
%
%
%
%
Switching Frequency
Absolute Maximum
ƒo
4.5V ≤ Vin ≤ 5.5V
0.1A ≤ Io ≤ 10A
650
0
700
—
750
+85
kHz
°C
Ta
Ta
Ts
Operating Temperature Range
Recommended Operating
Temperature Range
Forced Air Flow = 200 LFM
Over Vin and Io Ranges
0
—
—
+65***
+125
°C
°C
Storage Temperature
Mechanical Shock
—
-40
Per Mil-STD-883D, Method 2002.3
1 msec, Half Sine, mounted to a fixture
—
—
—
500
10
—
—
—
G’s
Mechanical Vibration
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, Soldered in a PC board
G’s
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 +1.2V, whichever is greater.
out
*** 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.
36
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com
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