STEVAL-ISA152V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – 3 A DC output current

STEVAL-ISA152V1
3.3 V/3 A high efficiency step down DC-DC converter
(V_IN= 4.5 to 60 V) based on the L7987
Data brief
Features
• 3.3 V output voltage
• 3 A DC output current
• 4.5 V to 60 V input voltage
• 500 kHz switching frequency
• 3.5 ms programmed soft-start
• VBIAS switch-over for improved efficiency at
light load
• 180° out of phase synchronization available
• Open drain PGOOD available
• Auto recovery overcurrent and thermal
protection
• RoHS compliant
Description
The STEVAL-ISA152V1 product evaluation board
is a step-down switching power supply based on
the L7987 regulator in an HTSSOP16 package.
The output voltage can be set starting from 0.8 V.
Low drop-out operation, with almost 100% duty
cycle, can be achieved.
The L7987 is a 61 V, 3 A step-down
asynchronous switching regulator with embedded
power MOSFET caable of delivering up to 3 A of
current, depending on the application conditions.
The embedded switch-over feature on the VBIAS
pin and the light load management (pulse
skipping) are intended to maximize power
conversion efficiency across the entire load
range.
The soft-start, current limit threshold and the
switching frequency are adjustable for application
optimization.
The device includes an internal 250 kHz oscillator
that can be externally adjusted up to 1.5 MHz;
two L7987 regulators can be synchronized in a
180° out-of-phase configuration for reduced total
input RMS current.
May 2014
DocID025489 Rev 1
For further information contact your local STMicroelectronics sales
office
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