STEVAL-ISA053V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – Demonstration board for the PM6680 dual step-down controller with adjustable output voltage for notebook power system

STEVAL-ISA053V1
Demonstration board for the PM6680 dual step-down controller
with adjustable output voltage for notebook power system
Data Brief
Features
■ Constant on-time control allows very fast load
transients
■ 6 V to 28 V input voltage range
■ 5 V auxiliary output voltage
■ Accurate current limit with sense resistor
■ Adjustable switching outputs
■ Lossless current sensing
■ Negative current limit
■ Soft-start internally fixed at 2.8 ms
■ Soft-end for output discharge
■ 200 kHz / 300 kHz, 300 kHz / 400 kHz, 400 kHz
/ 500 kHz (5 V / 3 V selectable switching
frequency)
■ Selectable pulse skip and no-audible skip
modes at light loads
■ Independent Power Good signals
STEVAL-ISA053V1
Description
The PM6680 is a dual step-down controller with
adjustable output voltages for notebook computer
power systems. The STEVAL-ISA053V1
demonstration board is designed to test the
performance of the PM6680 by employing a
typical application circuit which allows testing of
all PM6680 device functions. The board features
two switching sections, with (typically) 1.5 V and
1.05 V outputs, from a 6 V to 28 V input battery
voltage. The operating switching frequency of the
two switching sections is 200 kHz / 300 kHz,
respectively. Each switching section delivers more
than 5 A of output current. Moreover, an internal
linear regulator can provide 5 V @ 100 mA peak
current.
September 2008
Rev 1
For further information contact your local STMicroelectronics sales office.
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www.st.com
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