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ST1S31 Datasheet(PDF) 1 Page - STMicroelectronics

Part # ST1S31
Description  3 A DC step-down switching regulator
PDF  35 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST1S31 Datasheet(HTML) 1 Page - STMicroelectronics

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This is information on a product in full production.
March 2016
DocID022998 Rev 4
1/35
ST1S31
3 A DC step-down switching regulator
Datasheet
- production data
Features
 3 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 and 45 m power MOSFETs
 All ceramic capacitor
 Power Good (POR)
 Cycle-by-cycle current limiting
 Current foldback short-circuit protection
 VFDFPN 3 x 3 - 8L, SO8 packages
Applications
 µP/ASIC/DSP/FPGA core and I/O supplies
 Point of load for: STB, TVs, DVDs
 Optical storage, hard disk drive, printers,
audio/graphic cards
Description
The ST1S31 device is an internally compensated
1.5 MHz fixed-frequency PWM synchronous step-
down regulator. The ST1S31 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 ST1S31 integrates a 60 m
 high-side switch
and a 45 m
 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 ST1S31 device is available in 3 mm x 3 mm,
8 lead VFDFPN and SO8 packages.
Figure 1. Application circuit
SO8
VFDFPN 3 x 3 - 8L
www.st.com


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