Datasheet > RT6551B

RT6551B

更新时间： 2024-02-26 23:18:19

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
23页	284K
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技术参数
数据手册

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RT6551B 技术参数

Status：	Active	Vs (typ) (V)：	5
Vin (min) (V)：	4.5	Vin (max) (V)：	26
Vout (min) (V)：	0.675	Vout (max) (V)：	3.3
Preset Vout (V)：		Output Adj. Method：	Resistor
Accuracy (+/- %)：	1	Freq (typ) (kHz)：
Freq (min) (kHz)：		Freq (max) (kHz)：
Iq (typ) (mA)：	0.135	Features：	Adjustable Frequency;COT Control;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;Fast Transient Response;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP
Package Type：	WQFN3x3-20

RT6551B 数据手册

RT6551A/B

Features

Ordering Information

RT6551A/B

 PWM Controller

^Adjustable Current Limit with Low-Side R_DS(ON)

Sensing

Package Type

QW : WQFN-20L 3x3 (W-Type)

^Low Quiescent Supply Current

Lead Plating System

^Quick Load-Step Response within 100ns

^1% V_VDDQAccuracy Over Line and Load

^Adjustable 0.675V to 3.3V Output Range for 1.8V

(DDR2), 1.5V (DDR3), 1.35V (DDR3L), 1.2V (LPDDR3)

and 1.2V (DDR4)

G : Green (Halogen Free and Pb Free)

VDDQ and VTT Discharge Control

A : Tracing Mode

B : Non-Tracking Mode

Note :

Richtek products are :

^4.5V to 26V Battery Input Range

 RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

^Resistor Adjustable Frequency

^Over-/Under-Voltage Protection

 Suitable for use in SnPb or Pb-free soldering processes.

^Internal Voltage Ramp Soft-Start

^Drives Large Synchronous Rectifier MOSFETs

^Power Good Indicator

Marking Information

RT6551AGQW

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

^Capable to Sink and Source Up to 1.5A

^LDO Input Available to Optimize Power Losses

^Requires Only 10μF Ceramic Output Capacitor

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

and VTTREF

8N= : Product Code

YMDNN : Date Code

8N=YM

DNN

^Accuracy 20mV for both VTTREF and VTT

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

 RoHS Compliant and Halogen Free

RT6551BGQW

8M= : Product Code

YMDNN : Date Code

8M=YM

DNN

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS6551A/B-00 May 2015

123 4 5 6 7...23

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