PM6670AS datasheet(1/54 Pages) STMICROELECTRONICS

部件名	PM6670AS

功能描述	Complete DDR2/3 memory power supplies controller

PDF	54 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

1 / 54 page

February 2008

Rev 1

1/54

PM6670AS

Complete DDR2/3 memory power supplies controller

Features

■ Switching section (VDDQ)

– 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 control loop

–No RSENSE current sensing using low side

MOSFETs' RDS(ON)

– Negative current limit

– Latched OVP and UVP

– Soft-start internally fixed at 3 ms

– Selectable pulse skipping at light load

– selectable No-Audible (33 kHz) pulse skip

mode

– Ceramic output capacitors supported

– Output voltage ripple compensation

■ VTT LDO and VTTREF

– 2 Apk LDO with foldback for VTT

– Remote VTT sensing

– High-Z VTT output in S3

– Ceramic output capacitors supported

– ±15 mA Low noise buffered reference

Applications

■ DDR2/3 memory supply

■ Digital TV system

■ SSTL18, SSTL15 and HSTL bus termination

Description

The device PM6670AS is a complete DDR2/3

power supply regulator designed to meet JEDEC

specifications.

It integrates a Constant On-Time (COT) buck

controller, a 2 Apk sink/source Low Drop Out

regulator and a 15 mA low noise buffered

reference.

The COT architecture assures fast transient

response supporting both electrolytic 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 full 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.

VFQFPN-24 4x4

Table 1.

Device summary

Part number

Package

Packaging

PM6670AS

VFQFPN-24 4x4 (Exposed pad)

Tube

PM6670ASTR

Tape and reel

www.st.com

类似零件编号 - PM6670AS

制造商	部件名	数据表	功能描述
STMicroelectronics	PM6670	682Kb / 53P	Complete DDR2/3 memory power supply controller 01-Mar-2007
	PM6670S	717Kb / 53P	Complete DDR2/3 memory power supply controller 06-Feb-2008
	PM6670STR	717Kb / 53P	Complete DDR2/3 memory power supply controller 06-Feb-2008

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类似说明 - PM6670AS

制造商	部件名	数据表	功能描述
Texas Instruments	TPS51116	667Kb / 29P	COMPLETE DDR AND DDR2 MEMORY POWER SOLUTION SYNCHRONOUS BUCK CONTROLLER, 3-A LDO, BUFFERED REFERENCE
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