PT8000 Datasheet, PDF (1/8 Pages) Texas Instruments – 60 Amp High-Performance Programmable ISR

PT8000—5V
60 Amp High-Performance
Programmable ISR
SLTS135A
(Revised 4/5/2001)
Features
• 60A Output Current
• Multi-Phase Topology
• +5V Input
• 5-bit Programmable:
1.3V to 3.5V
1.075V to 1.850V
• High Efficiency
• Differential Remote Sense
• Short Circuit Protection
• Output Tracking Feature
• Over-Temp Shutdown
• Power Good & OV Flag
• Low-Profile Package
• Solderable Copper Case
• “Current Booster”
Compatible
Ordering Information
PT8001o = 1.3 to 3.5 Volts
PT8002o = 1.075 to 1.850 Volts
PT Series Suffix (PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
N
Horizontal Through-Hole
A
Horizontal Surface Mount
C
For dimensions and PC board layout, see
Package Styles 1600, 1610 and 1615
Standard Application
Description
The PT8000 series is a 60 A high-
performance, Integrated Switching
Regulator (ISR) housed in a single
low-profile 44-pin SIP package.
Operating from an input voltage of
+5V, the PT8000 series offers a
state-of-the-art “Plug-in Power”
solution for highly-integrated
digital systems that demand high
power supply currents at low voltages.
The output voltage from these
modules is programmable over a
preset range via a 5-bit input. The
PT8001 may be set from 1.3V to
3.5V, which is compatible with Intel’s
Pentium Pro® µ-processors. The
output voltage of the PT8002 is
programmable from 1.075V to 1.85V.
The PT8000 series incorporates
many features to facilitate system
integration. Output short-circuit
protection and over-temperature
shutdown enables these modules to
survive any load fault. Two self-
diagnosotic signals, “Power Good”
(PWRGD*) and “Over-Voltage
Flag” (OVF*) are provided. And a
unique tracking feature allows the
output to be synchronized to a master
ramp voltage during power-up.
Other features include a standby
input, and a differential remote sense
to compensate for voltage drop between
the ISR and load.
A low ESR capacitance of 2000µF
is required at the input for proper
operation.
PROGRAMMING PINS
VID0
VID1
VID2
VID3
VID4
V _IN
30 31 32 33 34
VID4 – VID0
x8
V _IN
PT8000
+ REMOTE SENSE
25
+SNS
V_OUT ^x10
V_OUT
+
C _IN
STBY
STBY* GND PWRGD* –SNS ^VDD
22
x10
21
20
Q₁
PWRGD*
Cin = Required 2000µF electrolytic (1)
CL = Optional capacitance at load (1)
R1 = Required 10k pull-up resistor when using the PWRGD*
signal. The PWRGD* output is low when the output
voltage is within specifications.
L
+
C_L
O
A
D
GND
GND
– REMOTE SENSE
For technical support and more information, see inside back cover or visit www.ti.com/powertrends