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RT7241A PDF预览

RT7241A

更新时间： 2024-11-12 15:50:03
品牌 Logo 应用领域
立锜 - RICHTEK /
页数 文件大小 规格书
20页 299K
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RT7241A 技术参数

Status：ActiveVin (min) (V)：4.5
Vin (max) (V)：23Number of Outputs：1
Vout (min) (V)：0.6Vout (max) (V)：1.5
Preset Vout (V)：Output Adj. Method：Resistor
Iout (max) (A)：12Current Limit (typ) (A)：16
Freq (typ) (kHz)：500Freq (min) (kHz)：
Freq (max) (kHz)：Ext Sync：No
Ron_HS (typ) (mOhm)：17Ron_LS (typ) (mOhm)：4.5
Iq (typ) (mA)：0.1Features：ACOT Control;Adjustable Current Limit;Built-in Bootstrap Switch;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;Fast Transient Response;OCP;OVP;Power Good;SCP;Stable with Ceramic Capacitor;UVP
Package Type：UQFN3x4-18(FC)

RT7241A 数据手册

 浏览型号RT7241A的Datasheet PDF文件第2页浏览型号RT7241A的Datasheet PDF文件第3页浏览型号RT7241A的Datasheet PDF文件第4页浏览型号RT7241A的Datasheet PDF文件第5页浏览型号RT7241A的Datasheet PDF文件第6页浏览型号RT7241A的Datasheet PDF文件第7页 
®
RT7241A  
12A, 23V, 500kHz, ACOTTM Synchronous Buck Converter  
with VTT LDO for Memory Power Supply  
General Description  
Features  
DDR3/DDR3L/LPDDR3/DDR4 Complete Solution  
The RT7241Aprovides a complete power supply forDDR3/  
DDR3L/LPDDR3/DDR4 memory systems. It integrates an  
Advanced Constant On-Time (ACOTTM) mode synchronous  
Buck converter with a 1.5A sink/source tracking linear  
regulator.  
PWM Converter (VDDQ)  
100μA Low Quiescent Supply Current at S3 Mode  
ACOTTM Mode Performs Fast Transient Response  
Support MLCC Output Capacitors  
Integrated Low On-Resistance MOSFETs  
17mΩ of High-Side MOSFET  
The PWM converter provides low quiescent supply  
current, 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 ACOTTM control  
scheme handles wide input/output voltage ratios with ease  
and provides a very fast response to load transients with  
no external compensators.  
4.5mΩ of Low-Side MOSFET  
Adjustable from 0.6V to 1.5V Output Range for  
1.5V (DDR3), 1.35V (DDR3L), 1.2V (LPDDR3) and 1.2V  
(DDR4)  
4.5V to 23V Battery Input Range  
500kHz Switching Frequency  
Resistor Adjustable Valley Current Limit  
Over-/Under-Voltage Protection  
The 1.5A sink/source VTT LDO maintains fast transient  
response only requiring 10μF ceramic output capacitance.  
The RT7241A supports all of the sleep state controls  
placing VTT at high-Z in S3 and discharging VDDQ and  
VTT in S4/S5.  
Internal Voltage Ramp Soft-Start  
Power Good Indicator  
1.5A LDO (VTT)  
Capable to Sink and Source up to 1.5A  
LDO Input Available to Optimize Power Losses  
Require Only 10μF Ceramic Output Capacitor  
Integrated Divider Tracks 1/2 VDDQ for VTT  
Accuracy 20mV for VTT  
The RT7241A provides complete protection features  
including OCP, OVP, UVP, and thermal shutdown. The  
RT7241Ais available in the UQFN-18L 3x4 package.  
Applications  
DDR3/DDR3L/LPDDR3/DDR4 Memory Power Supplies  
Support High-Z in S3 and Soft-Off in S4/S5  
Tracking Mode Discharge Control  
Thermal Capable Flip-chip (FC) Package for 12A  
VDDQ Converter and 1.5A VTT LDO  
RoHS Compliant and Halogen Free  
Notebook computers  
Simplified Application Circuit  
Marking Information  
BOOT  
RT7241A  
V
VIN  
IN  
C
B
C
C
L
IN  
00= : Product Code  
PHASE  
V
DDQ  
VDD  
V
DD  
R1  
R2  
YMDNN : Date Code  
00=YM  
C
OUT  
VDD  
FB  
R
PGOOD  
DNN  
PGND  
VDDQ  
PGOOD  
PGOOD  
VLDOIN  
S3  
S5  
S3  
S5  
VTT  
VTTSNS  
VTTGND  
V
TT  
C
VTT  
GND  
CS  
R
CS  
Copyright 2017 Richtek Technology Corporation. All rights reserved.  
©
is a registered trademark of Richtek Technology Corporation.  
DS7241A-02 January 2017  
www.richtek.com  
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