Datasheet > RT8207LZQW

RT8207LZQW

更新时间： 2024-02-17 01:06:15

品牌	Logo	应用领域
立锜 - RICHTEK		双倍数据速率
页数	文件大小	规格书
27页	342K
描述
Complete DDRII/DDRIII/Low-Power DDRIII/DDRIV Memory Power Supply Controller

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RT8207LZQW 数据手册

RT8207L/M

Complete DDRII/DDRIII/Low-Power DDRIII/DDRIV Memory

Power Supply Controller

General Description

Features

^PWM Controller

The RT8207L/M provides a complete power supply for both

DDRII/DDRIII/Low-PowerDDRIII/DDRIV memory systems.

It integrates a synchronous PWM buck controller with a

1.5Asink/source tracking linear regulator and buffered low

noise reference.

 Resistor Programmable Current Limit by Low Side

R_DS(ON)Sense

 Quick Load Step Response Within 100ns

 1% V_VDDQAccuracy Over Line and Load

 Fixed 1.8V (DDRII), 1.5V (DDRIII) or Adjustable

0.75V to 3.3V Output Range for 1.35V (Low-Power

DDRIII) and 1.2V (DDRIV)

The PWM controller provides the high efficiency, excellent

transient response, and highDC output accuracy needed

for stepping down high voltage batteries to generate low

voltage chipset RAM supplies in notebook computers.

The constant-on-time PWM control scheme handles wide

input/output voltage ratios with ease and provides 100ns

“instant-on” response to load transients while maintaining

a relatively constant switching frequency.

 4.5V to 26V Battery Input Range

 Resistor Programmable Frequency

 Over/Under Voltage Protection

^Internal Current Limit Ramp Soft-Start

^Drives Large Synchronous-Rectifier FETs

^Power Good Indicator

The RT8207L/M achieves high efficiency at a reduced cost

by eliminating the current sense resistor found in

traditional current mode PWMs. Efficiency is further

enhanced by its ability to drive very large synchronous

rectifier MOSFETs. The buck conversion allows this device

to directly step down high voltage batteries for the highest

possible efficiency.

 1.5A LDO (VTT), Buffered Reference (VTTREF)

^Capable to Sink and Source 1.5A

^External Input Available to Minimize Power Losses

^Integrated Divider Tracks 1/2 VDDQ for Both VTT

and VTTREF

^Buffered Low Noise 10mA VTTREF Output

^Remote Sensing (VTTSNS)

^20mV Accuracy for Both VTTREF and VTT

^Supports High-Z in S3 and Soft-Off in S4/S5

 RoHS Compliant and Halogen Free

The 1.5A sink/source LDO maintains fast transient

response, only requiring 20μF of ceramic output

capacitance. In addition, the LDO supply input is available

externally to significantly reduce the total power losses.

The RT8207L/M supports all of the sleep state controls

placing VTT at high-Z in S3 and discharging VDDQ, VTT

and VTTREF (soft-off) in S4/S5.

Applications

 DDRI/II/III/Low-Power DDRIII/DDRIV Memory Power

Supplies

The RT8207L/M has all of the protection features including

thermal shutdown and is available in WQFN-24L 4x4 and

WQFN-20L 3x3 packages.

 Notebook Computers

 SSTL18, SSTL15 and HSTL Bus Termination

is a registered trademark of Richtek Technology Corporation.

DS8207L/M-08 September 2016

www.richtek.com

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与RT8207LZQW相关器件

型号	品牌	获取价格	描述	数据表
RT8207M	RICHTEK	获取价格	暂无描述
RT8207MGQW	RICHTEK	获取价格	Complete DDRII/DDRIII/Low-Power DDRIII/DDRIV Memory Power Supply Controller
RT8207MZQW	RICHTEK	获取价格	Complete DDRII/DDRIII/Low-Power DDRIII/DDRIV Memory Power Supply Controller
RT8207N	RICHTEK	获取价格	暂无描述
RT8207P	RICHTEK	获取价格	暂无描述
RT8208A	RICHTEK	获取价格	Programmable Output Voltage Single Synchronous Buck Controller
RT8208AGQW	RICHTEK	获取价格	Resistor Programmable Output Voltage from 0.75V to 3.3V with Integrated Transition Support
RT8208AZQW	RICHTEK	获取价格	Resistor Programmable Output Voltage from 0.75V to 3.3V with Integrated Transition Support
RT8208B	RICHTEK	获取价格	暂无描述
RT8208BGQW	RICHTEK	获取价格	Resistor Programmable Output Voltage from 0.75V to 3.3V with Integrated Transition Support

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