CM3131-01SB CALMIRCO [California Micro Devices Corp], CM3131-01SB Datasheet

CM3131-01SB

Manufacturer Part Number

CM3131-01SB

Description

Triple Linear Voltage Regulator for DDR-I/-II Memory

Manufacturer

CALMIRCO [California Micro Devices Corp]

Datasheet

1.CM3131-01SB.pdf (10 pages)

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Features

•

Applications

•

02/02/04

Electrical Schematic

Integrated power solution for DDR-I and DDR-II

memory systems with few external components

Three all-linear regulators for V

Lowest system cost and smallest footprint for

DDR power solutions

provide up to 15A current at 2.5V/1.8V

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 500mA 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 V

regulator

Available in 8 lead and 14 lead PSOP packages

Lead-free versions available

Desktop PCs, notebooks, and workstations

Set top boxes, digital TVs, printers

Embedded systems

STBY

DDQ

source/sink regulator provides up to 2A at

regulator/driver utilizes external N-FET to

power supply applications

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

Triple Linear Voltage Regulator for DDR-I/-II Memory

STBY

DDQ

and V

, V

and

Tel: 408.263.3214

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

independent linear regulators for V

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 V

unmatched N-FETs on two V

incorporates an adjustment pin (SENSE) to enable

setting V

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.

5V)

DDQ

supply. The

Fax: 408.263.7846

rail. The CM3131-02 drives two external

in the 2.2V to 2.8V range, supporting

CM3131 features three

DDQ

www.calmicro.com

rails. Each V

DDQ

CM3131

, V

and V

DDQ

STBY

rail

Related parts for CM3131-01SB

CM3131-01SB Summary of contents

Page 1

... V 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 V unmatched N-FETs on two V incorporates an adjustment pin (SENSE) to enable setting V DIMMs with different supply requirements or DDR-II type devices ...

Page 2

... Standby Input Supply STBY DRIVE / DRIVE1 Drive Output for V DRIVE2 Drive Output for V SENSE2 Sense Input, Adjusts DDQ 2 DDQ PART NUMBERING INFORMATION PART 1 MARKETING CM3131-01SB CM3131-11SB CM3131-02SB Tel: 408.263.3214 CM3131 TOP VIEW DDQ1 V DDQ2 CM3131-02 SENSE2 DRIVE2 DRIVE1 ...

Page 3

... The CM3131-01 and CM3131-11 differ with regards . DDQ the selection of truth table for determining which S0- S5 sequencing matrix the chip is set for. The is fixed at DDQ CM3131-02 has both EN and SEL pins to more accurately define each Sx stage without monitoring the V Two CM3131s can be ganged together to provide TT V DDQ the memory controller chip of any chip set ...

Page 4

... Sequencing Matrix for CM3131-01 for Suspend to RAM operation Sequencing Matrix for CM3131-01 for Suspend to RAM Not Supported V CC 3V/3.3V <V <V © 2004 California Micro Devices Corp. All rights reserved. 02/02/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 V SEL V STBY DDQ 1,2 5V/3 ...

Page 5

... Functional Description (cont’ Sequencing Matrix for CM3131-11 for Suspend to RAM operation V CC 3V/3.3V <V CC MIN X 0V <V CC MIN Table Sequencing Matrix for CM3131-02 for Suspend to RAM operation © 2004 California Micro Devices Corp. All rights reserved. ...

Page 6

... V Regulator STBY Supply Voltage V STBY Load Current © 2004 California Micro Devices Corp. All rights reserved. 02/02/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ABSOLUTE MAXIMUM RATINGS Tel: 408.263.3214 CM3131 RATING UNITS ± 2000 (GND – 0.6) to (+6.5) (GND – 0. 0.6) CC (GND – +70 ...

Page 7

... CC V < =150mA 5V, DDQ STBY SENSE = 10mA to 500mA, DDQ STBY I = 150mA, DDQ V = 3.0V to 5.5V STBY I = 250mA, each channel DDQ V < 1V DDQ ° ° +70 C unless otherwise noted. Tel: 408.263.3214 CM3131 (SEE NOTE 1) MIN TYP MAX - 150 - 2.80 2.45 2.50 2.55 9.50 6.1 1200 2.5 -1.0 - 1.0 -1.0 - 1.0 1.20 1.25 1.30 -1.0 - 1.0 -1.0 - 1.0 2.3 0.6 2 ...

Page 8

... DDQ1,2 DDQ TT DDQ Normal mode (S0-S2 /2) DDQ1,2 DDQ TT DDQ Standby mode (S3 =0) DDQ1,2 DDQSTBY TT Shutdown mode (S4-S5 =0) DDQ1,2 TT Tel: 408.263.3214 Fax: 408.263.7846 CM3131 TYP MAX UNITS µA 5 µA 1650 2450 µA 550 850 µA 70 120 www.calmicro.com 8 ...

Page 9

... Mechanical Details 8-lead PSOP Package Dimensions © 2004 California Micro Devices Corp. All rights reserved. 02/02/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 CM3131 www.calmicro.com 9 ...

Page 10

... Mechanical Details (cont’d) 14-lead PSOP Package Dimensions © 2004 California Micro Devices Corp. All rights reserved. 02/02/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 CM3131 www.calmicro.com 10 ...

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