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STEVAL-ISA049V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – Synchronous rectification | |||
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STEVAL-ISA049V1
Synchronous dual buck converter with reset
demonstration board based on the ST2S06A
Data brief
Features
â Step-down current mode PWM (1.5 MHz)
DC-DC converter
â Fixed or adjustable output voltage from 0.8 V
â 2% DC output voltage tolerance
â Synchronous rectification
â Reset function
â Internal soft start for start-up current limitation
and power ON delay of 50-100 µs
â Typical efficiency: > 90%
â 0.5 A output current capability
â Non-switching quiescent current: max 1 mA
over temperature range
â RDS(on) 150 mΩ (typ.)
â Uses tiny capacitors and inductors
â RoHS compliant
STEVAL-ISA049V1
Description
This demonstration board is based on the
ST2S06A, a dual synchronous step-down DC-DC
converter optimized for powering low-voltage
digital cores in ODD applications and, generally,
used to replace the high current linear solution
when the power dissipation may cause a high
heating of the application environment.
It provides up to 0.5 A over an input voltage range
of 2.5 V to 5.5 V.
A high switching frequency (1.5 MHz) allows the
use of tiny surface-mount components. A resistor
divider to set the output voltage value, an inductor
and two capacitors are required for every channel.
In addition, a low output ripple is guaranteed by
the current mode PWM topology and by the use
of low ESR surface-mount ceramic capacitors.
The demonstration board is thermal protected
and current limited to prevent damage due to
accidental short-circuit.
July 2009
Doc ID 15976 Rev 1
For further information contact your local STMicroelectronics sales office.
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www.st.com
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