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ST1S32PUR Datasheet(PDF) 1 Page - STMicroelectronics

Part # ST1S32PUR
Description  4 A DC step-down switching regulator
PDF  29 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST1S32PUR Datasheet(HTML) 1 Page - STMicroelectronics

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This is information on a product in full production.
May 2012
Doc ID 023246 Rev 1
1/29
29
ST1S32
4 A DC step-down switching regulator
Datasheet — production data
Features
■ 4 A DC output current
■ 2.8 V to 5.5 V input voltage
■ Output voltage adjustable from 0.8 V
■ 1.5 MHz switching frequency
■ Internal soft-start and enable
■ Integrated 60 m
Ωand 45 mΩPower MOSFETs
■ All ceramic capacitor
■ Power Good (POR)
■ Cycle-by-cycle current limiting
■ Current foldback short-circuit protection
■ VFDFPN 8 4x4x1.0 package
Applications
■ µP/ASIC/DSP/FPGA core and I/O supplies
■ Point of Load for: STB, TV, DVD
■ Optical storage, hard disk drives, printers,
audio/graphic cards
Description
The ST1S32 is an internally compensated 1.5
MHz fixed-frequency PWM synchronous step-
down regulator. The ST1S32 operates from 2.8 V
to 5.5 V input, while it regulates an output voltage
as low as 0.8 V and up to VIN.
The ST1S32 integrates a 60 m
Ω high-side switch
and a 45 m
Ω synchronous rectifier, allowing very
high efficiency with very low output voltages.
The peak current mode control with internal
compensation delivers a very compact solution
with a minimum component count.
The ST1S32 is available in 4 mm x 4 mm, 8-lead
VFDFPN package.
Figure 1.
Application circuit
VFDFPN 8 4x4x1.0
VINSW
SW
VFB
PG
GND
EN
ST1S32
Cin_sw
Cout
L
R1
R2
VINA
Cin_a
R3
VOUT
VIN
AM12608V1
www.st.com


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