CM3131 Datasheet | California Micro Devices

Features Integrated power solution for DDR-I and DDR-II memory systems with few external ponents - Three all-linear regulators for VDDQ, VTT and VSTBY power supply applications - Lowest system cost and smallest footprint for DDR power solutions - VDDQ regulator/driver utilizes external N-FET to .. provide up to 15A current at 2.5V/1.8V - VTT source/sink regulator provides up to 2A at 1.25V for DDR-I systems or 0.65A at 0.9V for the DDR-II memory controller (not DDR-II memory) - LDO standby regulator provides up to 500m A at 2.5V for DDR-I and at 1.8V for DDR-II systems - Can be ganged for higher current applications - Over temperature and reverse current protection - Over current protection for VSTBY and VTT regulator - Available in 8 lead and 14 lead PSOP packages - Lead-free versions available - Product Description The CM3131 family of all-linear regulators provides an integrated power solution for DDR-I/-II memory systems in both run-time and standby modes of operation. The CM3131 is ideal for designs incorporating both a main 3.3V and a standby (3.3V or 5V) supply. The CM3131 features three independent linear regulators for VDDQ, VTT and VSTBY supply regulation and will maintain an accuracy of ±1% across the operating temperature range. The CM3131 is offered in two configurations. The CM3131-01/11 drives a single external N-FET on a single VDDQ rail. The CM3131-02 drives two external unmatched N-FETs on two VDDQ rails. Each VDDQ rail incorporates an adjustment pin (SENSE) to enable setting VDDQ in the 2.2V to 2.8V range, supporting DIMMs with different supply requirements or DDR-II type devices. The CM3131-01/11 is available in 8-lead PSOP package and the CM3131-02 is available in 14-lead PSOP package. The CM3131 devices are also available with optional lead-free finishing. Applications - - - Desktop PCs, notebooks, and workstations Set top boxes, digital TVs, printers Embedded systems Electrical Schematic © 2004 California Micro Devices Corp. All rights...