STEVAL-ISA045V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – 2 A / 1.2 V high-efficiency synchronous buck converter evaluation board based on the ST1S09

STEVAL-ISA045V1
Features
2 A / 1.2 V high-efficiency synchronous buck converter
evaluation board based on the ST1S09
Data Brief
■ Input voltage range: 2.7 V to 5.5 V
■ Output voltage: 1.2 V
■ Max I_out: 2 A
■ High internal switching frequency: 1.5 MHz
■ Short-circuit protection
■ ST1S09 in the DFN6 3x3 package
Description
This evaluation board, based on the ST1S09
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.
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.
The ST1S09 family is available in the DFN6 3x3
package.
STEVAL-ISA045V1
March 2008
Rev 1
For further information contact your local STMicroelectronics sales office.
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