MIC5162

Dual Regulator Controller for DDR3

GDDR3/4/5 Memory and High-Speed

Bus Termination

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

March 2010

M9999-033110

General Description

The MIC5162 is a dual regulator controller designed for

high speed bus termination. It offers a simple, low-cost

JEDEC compliant solution for terminating high-speed, low-

voltage digital buses (i.e. DDR, DDR2, DDR3, SCSI, GTL,

SSTL, HSTL, LV-TTL, Rambus, LV-PECL, LV-ECL, etc).

The MIC5162 controls two external N-Channel MOSFETs

to form two separate regulators. It operates by switching

between either the high-side MOSFET or the low-side

MOSFET depending upon whether the current is being

sourced to the load or sunk by the regulator.

Designed

to

provide

a

universal

solution

for

bus

termination regardless of input voltage, output voltage, or

load current. The desired MIC5162 output voltage can be

programmed by forcing the reference voltage externally to

desired voltage.

The MIC5162 operates from an input of 1.35V to 6V, with

a second bias supply input required for operation. It is

available in a tiny MSOP-10 package with operating

junction temperature range of -40°C to +125°C.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

•

Input voltage range: 1.35V to 6V

•

•

Tracking programmable output

•

Wide bandwidth

•

Logic controlled enable input

•

Requires minimal external components

•

DDR, DDR2, DDR3, memory termination

•

•

JEDEC Compliant Bus Termination for SCSI, GTL,

SSTL, HSTL, LV-TTL, Rambus, LV-PECL, LV-ECL, etc

•

Tiny MSOP-10 package

Applications

•

Desktop Computers

•

Notebook computers

•

Communication systems

•

Video cards

•

DDR/DDR2/DDR3 memory termination

____________________________________________________________________________________________________________

Typical Application

Typical SSTL-2 Application

(Two MOSFETs Support a 3.5A Application)