PT8125 Datasheet, PDF (1/10 Pages) Texas Instruments – 30-A 12-V Input Programmable Integrated Switching Regulator

PT8120 Series
30-A 12-V Input Programmable
Integrated Switching Regulator
SLTS158B
(Revised 6/6/2002)
Features
• Single Device: 30ADC
• +12V-Input
• High Efficiency: 92% @3.3V
• Programmable Output:
(VRM Compatible 5-bit Codes)
• Multiphase Topology
• Output Remote Sense
• Over-Current Protection
• Thermal Shutdown
• Standby On/Off Control
• Space-Saving Package
• Solderable Copper Case
Description
The PT8120 Excalibur™ power
modules are a family of high-output,
high-efficiency, fully integrated
switching regulators (ISRs), housed
in a solderable 31-pin space-saving
copper package. These modules
operate from a nominal input voltage
of +12V to provide up to 30A of
output current at output voltages as
low as 0.8V. The output voltage is
programmable via a 5-bit input code.
The PT8120 family incorporates
a state-of-the-art, 2-phase, multiple
power path topology. This extends
the output current range while pro-
viding superior transient response
and input current ripple performance.
The PT8120 family is designed
to power high-end computing and
signal processing applications, all of
which demand high output currents
at low supply voltages.
The modules have a number of
features to facilitate system integra-
tion. These include over-current
protection, thermal shutdown, an
on/off standby control, and an output
remote sense to compensate for
voltage drop between the regulator
and the load. In addition, the volt-
age programming codes for the
PT8121, PT8122, & PT8124 are
compatible with Intel’s® VRM
specifications.
Ordering Information
PT8121H
PT8122H
PT8123H
PT8124H
PT8125H
= 1.3V to 3.5V
= 1.075V to 1.85V
= 0.8V to 1.575V
= 1.05V to 1.825V
= 4.5V to 7.6V
PT Series Suffix (PT1234 x )
Case/Pin
Configuration
Order
Suffix
Package
Code
Vertical
Horizontal
SMD
N
(EKH)
A
(EKF)
C
(EKG)
(Reference the applicable package code drawing for
the dimensions and PC board layout)
PT812x Standard Application (See page 4 for PT8124 application schematic)
VID0
VID1
VID2
VID3
VID4
VID
Common
PROGRAMMING PINS
REMOTE SENSE
11 5 4 3 2 1 31
V_IN
GND
L_in
1µH
12–16
+
C_IN
PT8120 Series
(Except PT8124)
6
17–22
23–30
+
C_OUT
V_OUT
L
O
A
D
GND
STBY*
Cin = Required 1500µF electrolytic
Cout = Required 660µF low ESR OS-Con®, or
1,200µF aluminum electrolytic
Lin = Optional 1µH input choke
For technical support and more information, see inside back cover or visit www.ti.com