PT7600 Datasheet, PDF (1/3 Pages) Texas Instruments – 10 AMP PROGRAMMABLE INTEGRATED SWITCHING REGULATOR

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PT7600
Series
10 AMP PROGRAMMABLE INTEGRATED
SWITCHING REGULATOR
Application Notes
Mechanical Outline
Product Selector Guide
Revised 5/15/98
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 pack-
age. 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.
Pin-Out Information
Standard Application
PROGRAMMING PINS
VID0
VID1
VID2
VID3
VID4
VIN
L1
1µH
SYNC OUT
GND
STBY*
+
C_IN
6432 1
26
7 - 11 _PT7600
REMOTE SENSE (+)
20 - 25
VOUT
27
13 - 19 5 12
+
C_OUT
LOAD
GND
REMOTE SENSE (-)
Cin = Required 1200µF electrolytic
Cout = Required 1200µF electrolytic
L1 = Optional 1µH input choke
Pin Function
1 VID0
2 VID1
3 VID2
4 VID3
5 STBY* - Stand-by
6 VID4
7 V_in
8 Vin
9 V_in
Pin Function
10 V_in
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 V_out
22 Vout
23 V_out
24 Vout
25 V_out
26 Remote Sense Vout
27 Do not connect
For STBY* pin; open = output enabled; ground = output
disabled.
Specifications
Characteristics
(T_a = 25°C unless noted)
Symbols
Conditions
PT7600 SERIES
Min
Typ
Max
Units
Output Current
Input Voltage Range
Output Voltage Tolerance
Line Regulation
Load Regulation
Vo Ripple/Noise pk-pk
Transient Response
with Cout = 1200µF
Efficiency
Io
Vin
∆V_o
Reg_line
Regload
Vn
t_tr
Vos
η
Switching Frequency
ƒ_o
Absolute Maximum
T_a
Operating Temperature Range
Ta = +60°C, 200 LFM, pkg N
Ta = +25°C, natural convection
0.1A ≤ Io ≤ 10A
V_in = +5V, I_o = 10A
0°C ≤ Ta ≤ +55°C
4.5V ≤ V_in ≤ 5.5V, I_o = 10A
Vin = +5V, 0.1 ≤ Io ≤ 10A
Vin = +5V, Io = 10A
I_o step between 5A and 10A
Vo over/undershoot
V_in = +5V, I_o = 10A
4.5V ≤ V_in ≤ 5.5V
0.1A ≤ Io ≤ 10A
V_o = 3.3V
Vo = 2.9V
Vo = 2.5V
V_o = 1.8V
Vo = 1.5V
0.1^*
—
0.1^*
—
4.5^**
—
Vo-0.03 —
—
±10
—
±10
—
50
—
100
—
200
—
80
—
78
—
75
—
69
—
65
650
700
0
—
10
10
5.5
Vo+0.03
—
—
—
—
—
—
—
—
—
—
750
+85
A
A
V
V
mV
mV
mV
µSec
mV
%
%
%
%
%
kHz
°C
Recommended Operating
T_a
Temperature Range
Storage Temperature
T_s
Mechanical Shock
Forced Air Flow = 200 LFM
Over Vin and Io Ranges
—
Per Mil-STD-883D, Method 2002.3
1 msec, Half Sine, mounted to a fixture
0
—
-40
—
+65*** °C
+125
°C
—
500
—
G’s
Mechanical Vibration
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, Soldered in a PC board
—
10
—
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_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.
36
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