PT8100 Datasheet, PDF (1/14 Pages) Texas Instruments – 40-A 3.3/5-V Input Programmable Integrated Switching Regulator

PT8100 Series
40-A 3.3/5-V Input Programmable
Integrated Switching Regulator
SLTS157A
(Revised 8/23/2002)
Features
• 40ADC Output Current
• +3.3V or +5V Input
• Low Output Voltages:
0.8V—2.7V
• High Efficiency
• Programmable Output:
(VRM Compatible 5-bit Codes)
• Multiphase Topology
• Output Remote Sense
• Short-Circuit Protection
• Thermal Shutdown
• Standby On/Off Control
• Space-Saving Package
• Solderable Copper Case
Description
The PT8100 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. Modules are avail-
able for operation from either a 3.3V
or 5V nominal input bus voltage.
Each provides up to 40A of output
current at output voltages as low
as 0.8V. The output voltage is pro-
grammable via a 5-bit input code.
The PT8100 series 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 modules are designed for high-
end computing and signal processing
applications, both of which demand
high output currents at low supply
voltages.
The modules have a number of
standard features to facilitate system
integration. These include short-
circuit protection, thermal shutdown,
standby (On/Off) control, and an
output remote sense to compensate
for voltage drop between the regu-
lator and the load. In addition, the
voltage programming codes are
compatible with Intel’s® VRM
specifications.
Ordering Information
Part No.
Output Voltage
Progam Range
Input
Bus
PT8101H =1.300 to 2.70V 5V
PT8102H =1.075 to 1.85V 5V
PT8103H =1.075 to 1.85V 3.3V
PT8104H =1.050 to 1.825V 5V
PT8105H =0.800 to 1.575V 3.3V
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)
Standard Application (See p.3 for PT8104 application schematic)
VID0
VID1
VID2
VID3
VID4
VID
Common
V_IN
C₃ +
100µF
Optional
GND
STBY*
PROGRAMMING PINS
REMOTE SENSE
11 5 4 3 2 1 31
L₁
12–16
1µH
C₁ +
1,500µF
Required
PT8100 Series _23–30
V_OUT
(Except PT8104)
6
17–22
C₂ +
660µF
Required
L
O
A
D
GND
C1 = Required 1500µF electrolytic input capacitor
C2 = Required 660µF low ESR OS-Con®, or
1,200µF aluminum electrolytic
Lin/C3 = Optional input filter components. 1µH input
choke and 100µF electroytic capacitor.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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