Datasheet > RT6551A

RT6551A

更新时间： 2024-03-18 21:39:47

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
23页	284K
描述
Complete DDR Memory Power Supply Controller

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数据手册

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RT6551A 数据手册

RT6551A/B

Functional Pin Description

Pin No.

Pin Name

Pin Function

VTTGND

Power Ground for the VTT LDO.

Voltage Sense Input for the VTT LDO. Connect to the terminal of the VTT_LDO

output capacitor.

VTTSNS

GND

3, 21

(Exposed Pad)

The exposed pad must be soldered to a large PCB and connected to GND for

maximum power dissipation.

VTTREF

VDDQ

VTTREF Buffered Reference Output.

Reference Input for VTT and VTTREF.

Feedback Voltage Input. Connect to a resistive voltage divider from VDDQ to

GND to adjust the output voltage.

VTT LDO Enable Control Input. Do not leave this pin floating.

PWM Enable Control Input. Do not leave this pin floating.

TON

Set the UGATE On-Time Through a Pull-Up Resistor Connecting to VIN.

Power Good Open-Drain Output. In high state when VDDQ output voltage is

within the target range.

PGOOD

VID

Internal Reference Voltage Setting.

VDD

Supply Voltage Input for the Analog Supply and LGATE Gate Driver.

Current Limit Threshold Setting Input. Connect to GND through the voltage

setting resistor.

PGND

Power Ground for Low-Side MOSFET.

Low-Side Gate Driver Output for VDDQ.

LGATE

Switch Node. External inductor connection for VDDQ and behave as the current

sense comparator input for Low-Side MOSFET R_DS(ON)sensing.

PHASE

UGATE

BOOT

VLDOIN

VTT

High-Side Gate Driver Output for VDDQ.

Bootstrap Supply for High-Side Gate Driver.

Power Supply for VTT LDO.

Power Output for the VTT LDO.

is a registered trademark of Richtek Technology Corporation.

DS6551A/B-00 May 2015

www.richtek.com

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