STEVAL-ISA050V1: DDR2/3 Supply

Summary

The PM6641 demonstration board is a monolithic voltage regulator (VR) module with internal power MOSFETs, specifically designed to supply DDR2/3 memory and chipset in ultramobile PC and real estate constrained portable systems.

It integrates three independent, adjustable, constant frequency buck converters, a ±2 Apk low dropout (LDO) linear regulator, and a ±15 mA low-noise buffered reference.

Each regulator is provided with basic undervoltage (UV) and overvoltage (OV) protections, programmable soft-start and current limit, active soft-end, and pulse skipping at light loads.

Specifications

Manufacturer	STMicroelectronics
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Multi Output
Eval Board Part Number	497-8425-ND
Eval Board Supplier	STMicroelectronics
Eval Board	Board not Stocked
Topology	Step Down
Outputs and Type	4 Non-Isolated
Voltage Out: Highest Current First	1.8V, 1.05V, 1.5V, 0.9V
Current Out	4A, 3.5A, 2.5A, 2A
Voltage In	2.7 ~ 3.6 V
Efficiency @ Conditions	>85%, 3.3V in, 1.8V @ 2 A, 1.5V @ 1.2 A, 1.05V @ 1.1 A
Voltage Out Range	- Not Given
Features	Current Limit (Adj. or Fixed) Light Load Mode Over Voltage Protection Power Good Output Shutdown, Enable, Standby Soft Start Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	750 kHz
Standby Current [Typical]	- Not Given
Quiescent Current [Typical]	- Not Given
Component Count + Extras	51 + 26
Internal Switch	Yes
Design Author	STMicroelectronics
Application / Target Market	Computers
Standby Current [Maximum]	10 µA
Quiescent Current [Maximum]	3 mA
Main I.C. Base Part	PM6641
Date Created By Author
Date Added To Library	2011-03