Datasheet > G5616R51U

G5616R51U

更新时间： 2024-11-15 01:11:51

品牌	Logo	应用领域
致新 - GMT		双倍数据速率
页数	文件大小	规格书
4页	108K
描述
Complete DDR, DDRII and DDRIII Memory Solution Synchronous Buck PWM Controller, 3A LDO, Buffered Reference

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G5616R51U 数据手册

G5616

Global Mixed-mode Technology

Complete DDR, DDRII and DDRIII Memory Solution

Synchronous Buck PWM Controller, 3A LDO,

Buffered Reference

Features

•Synchronous Buck Controller (VDDQ)

General Description

The G5616 is intended for DDR/SSTL-2, D-

DRII/SSTL-18 and DDRIII memory systems. It inte-

grates a synchronous buck PWM controller with a 3-A

sink-source linear regulator and buffered reference.

Ultra-High Efficiency

No Current-Sense Resistor (Lossless ILIMIT)

Quasi-PWM with 100ns Load-Step Response

1.8V(DDRII) /1.5V(DDRIII) Fixed or Adjustable

to 2.5V(DDR) or 0.75V to 3.6V Adjustable Out-

put Range

The PWM controller uses constant on-time control

scheme to handle wide input/output voltage ratios with

ease and provides 100ns “instant-on” response to

load transients while maintaining a relatively constant

switching frequency. The G5616 achieves high effi-

ciency at a reduced cost by eliminating the cur-

rent-sense resistor found in traditional current-mode

PWMs. Efficiency is further enhanced by an ability to

drive very large synchronous rectifier MOSFETs. Sin-

gle-stage buck conversion allows these devices to

directly step down high-voltage batteries for the high-

est possible efficiency.

2V to 24V Battery Input Range

400kHz Switching Frequency

OVP & UVP of VDDQ Output

Drives Large Synchronous-Rectifier FETs

Power-Good Indicator

•3-A LDO (VTT), Buffered Reference (VTTREF)

Support DDR (1.25 VTT) , DDR II (0.9 VTT) and

DDRIII(0.75 VTT) Requirements

VLDOIN Voltage Range: 1.2V to 3.6V

Requires Only 20µF Ceramic VTT Output Ca-

pacitance

The 3A sink/source tracking termination regulator is

specifically designed for low-cost/ low-external com-

ponent count systems. The regulator contains a high

speed operational amplifier that provides fast load

transient response with only 20µF (2x10µF) of ceramic

output capacitance. The G5616 supports remote

sensing functions and all features required to power

the DDR /DDRII /DDRIII VTT bus termination accord-

ing to the JEDEC specification. In addition, the G5616

includes integrated sleep-state controls placing VTT in

High-Z in S3 (suspend to RAM) and soft-off for VTT

and VTTREF in S5 (Shutdown).

Supports High-Z in S3 and Soft-Off in S5

Integrated Divider Tracks 1/2 VDDQSNS for

Both VTT and VTTREF

Remote Sensing (VTTSNS)

±20mV Accuracy for VTT and VTTREF

10mA Buffered Reference (VTTREF)

Built-In Soft-Start to Reduce the VLDOIN Surg-

ing Current

Over Current Protection of VTT Output

Thermal Shutdown Protection

Applications

The G5616 provides OVP, UVP, over current and

thermal shutdown protection functions and is available

in a 20-pin 3X3 TQFN package and 24-pin 4X4 TQFN

includes over voltage protection.

Notebook Computers

CPU Core Supply

Chipset/RAM Supply as Low as 0.75V

1.8V and 2.5V I/O Supply

Ordering Information

ORDER

NUMBER

G5616RZ1U

G5616R51U

TEMP.

RANGE

PACKAGE

(Green)

MARKING

5616

-40°C to +85°C

TQFN3X3-20

TQFN4X4-24

Note: RZ: TQFN3X3-20

1: Bonding Code

U : Tape & Reel

R5: TQFN4X4-24

TEL: 886-3-5788833

http://www.gmt.com.tw

Ver: 1.5

Oct 26, 2012

12 3 4

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与G5616R51U相关器件

型号	品牌	获取价格	描述	数据表
G5616RZ1U	GMT	获取价格	Complete DDR, DDRII and DDRIII Memory Solution Synchronous Buck PWM Controller, 3A LDO, Bu
G5617	GMT	获取价格	Programmable Output High-Speed Step-Down Controller for Notebook Computer
G5618R41U	GMT	获取价格	Switching Regulator/Controller
G562	GMT	获取价格	Power Switch with Over
G5632	GMT	获取价格	null
G5640	GMT	获取价格	2.5A Buck Converter
G5642	GMT	获取价格	3A Buck Converter
G5644	GMT	获取价格	2.5A Buck Converter
G5645	HAMAMATSU	获取价格	GaAsP photodiode
G5654	GMT	获取价格	2A Step-down DC/DC

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