STEVAL-ISA046V1: 1.2V @ 2A, 2.7 ~ 5.5V in

Summary

This evaluation board, based on the ST1S09I family of synchronous step-down DC-DC converters, is optimized for powering all low voltage applications and, generally, replaces high current linear solutions when power dissipation may cause high heating of the application environment. It provides up to 2 A over an input voltage range of 2.7 V to 5.5 V.

A high 1.5 MHz switching frequency allows the use of tiny surface-mount components and in addition to the resistor divider to set the output voltage value, an inductor and two capacitors are required.

The ST1S09I features an inhibit function.

A low output ripple is guaranteed by the current mode PWM topology and by the use of low ESR surface-mount ceramic capacitors.

The device is thermally protected and current limited to prevent damage due to accidental short circuit.

Specifications

Manufacturer STMicroelectronics
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Board not Stocked
Topology Step Down
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set 1.2 V
Current Out 2 A
Voltage In 2.7 ~ 5.5 V
Efficiency @ Conditions >72%, 5V in, 1.2V @ 0.05 ~ 2 A
Voltage Out Range - Not Given
Features Current Limit (Adj. or Fixed)
Over Voltage Protection
Short Circuit Protection
Shutdown, Enable, Standby
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 1.5 MHz
Standby Current [Typical]
Quiescent Current [Typical] 1.5 mA
Component Count + Extras 6 + 2
Internal Switch Yes
Design Author STMicroelectronics
Application / Target Market Computers
FPGA / DSP / Processors
Point of Load (PoL)
Standby Current [Maximum] 1 µA
Quiescent Current [Maximum] 2.5 mA
Main I.C. Base Part ST1S09I
Date Created By Author 2008-03
Date Added To Library 2011-03

Support Documents & Media

ST1S09 - Datasheet STEVAL-ISA046V1 - Data Brief

Media

STEVAL_ISA046V1_Schematic.JPG STEVAL_ISA046V1_Board.JPG STEVAL_ISA046V1_Chart.JPG