STEVAL-ISA051V2 datasheet(1/4 Pages) STMICROELECTRONICS

Teilenummer	STEVAL-ISA051V2

Bauteilbeschribung	Latched OVP, UVP and thermal shutdown

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Data Brief

For further information contact your local STMicroelectronics sales office.

March 2008

Rev 1

1/4

4

STEVAL-ISA051V2

Complete DDR2/3 memory power supply controller

evaluation board based on the PM6670AS

Features

■ 4.5 V to 36 V input voltage range

■ 0.9 V, ±1% voltage reference

■ 1.8 V (DDR2) or 1.5 V (DDR3) fixed output

voltages

■ 0.9 V to 2.6 V adjustable output voltage

■ 1.237 V ±1% reference voltage available

■ Very fast load transient response using

constant on-time loop control

■ No RSENSE current sensing using the RDS(on)

of the low-side MOSFETs

■ Negative current limit

■ Latched OVP, UVP and thermal shutdown

■ Fixed 3 ms soft-start

■ Selectable pulse-skipping at light load

■ Selectable no-audible (33 kHz) pulse-skip

mode

■ All ceramic output capacitors application

supported

■ Output voltage ripple compensation

Description

This evaluation board based on the PM6670AS

device is a complete DDR2/3 power supply

regulator for portable applications designed to

meet JEDEC specifications. It integrates a

constant on-time (COT) buck controller, a 2 Apk

sink/source low dropout regulator and a 15 mA

low noise buffered reference.

The COT architecture assures fast transient

response supporting both polymeric and ceramic

output capacitors. An embedded integrator

control loop compensates the DC voltage error

due to the output ripple. The 2 Apk sink/source

linear regulator provides the memory termination

voltage with fast load transient response.

The device is fully compliant with system sleep

states S3 and S4/S5, providing LDO output high

impedance in suspend-to-RAM and tracking

discharge of all outputs in suspend-to-disk.

STEVAL-ISA051V2

www.st.com

Obsolete

Product(s)

- Obsolete

Product(s)

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