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RT8809B PDF预览

RT8809B

更新时间： 2024-01-25 07:16:31
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立锜 - RICHTEK /
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19页 287K
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RT8809B 技术参数

Status：ActiveVs (typ)(V)：12
Vin (min)(V)：4.5Vin (max)(V)：13.2
Vout (min)(V)：0.5Vout (max)(V)：2
Preset Vout(V)：Output Adj. Method：Ext Vref;Resistor
Accuracy(+/- %)：1Freq (typ)(kHz)：300
Freq (min)(kHz)：Freq (max)(kHz)：
Iq (typ)(mA)：4Features：Adjustable Current Limit;Adjustable Frequency;Built-in Bootstrap Switch;Current Mode Control;Cycle-by-Cycle Current Limit;DCR Current Sense;Diode Emulation Mode;Droop Control;Enable Input;G-NAVP Control;OVP;PSM;SCP;UVP;Ultrasonic Mode Control
Package Type：WQFN4x4-24

RT8809B 数据手册

 浏览型号RT8809B的Datasheet PDF文件第2页浏览型号RT8809B的Datasheet PDF文件第3页浏览型号RT8809B的Datasheet PDF文件第4页浏览型号RT8809B的Datasheet PDF文件第5页浏览型号RT8809B的Datasheet PDF文件第6页浏览型号RT8809B的Datasheet PDF文件第7页 
®
RT8809A/B  
Multi-Phase PWM Controller for GPU Core Power Supply  
General Description  
Features  
Dual-Phase PWM Controller  
The RT8809A/B is a dual-phase synchronous buck PWM  
controller with integrated drivers which are optimized for  
high performance graphic microprocessor and computer  
applications. The IC integrates a G-NAVPTM PWM  
controller, two 12V MOSFET drivers with internal bootstrap  
diodes, as well as output current monitoring and protection  
functions into the WQFN-24L 4x4 package. The  
RT8809A/B adoptsDCR and RDS(ON) current sensing. Load  
line voltage positioning (droop) and over current protection  
are accomplished through continuous inductorDCR current  
sensing, while RDS(ON) current sensing is used for accurate  
channel current balance. Using both methods of current  
sampling utilizes the best advantages of each technique.  
The RT8809A/B also features a one-bit VID control  
operation in which the feedback voltage is regulated and  
tracks external input reference voltage. Other features  
include, adjustable operating frequency, external  
compensation, and enable/shutdown functions.  
Two Embedded MOSFET Drivers and Embedded  
Switching Boot Diode  
Green-NAVPTM (Green Native Adaptive Voltage  
Positioning) Topology  
Dynamic Auto Phase Control with Programmable  
Threshold  
Cross-talk Jitter Suspend (CJSTM)  
Remote GND Detection for High Accuracy  
Automatic Diode Emulation Mode/Or Ultrasonic  
Mode at Light Load  
Lossless RDS(ON) Current Sensing for Current Balance  
Lossless DCR Current Sensing for AVP & OCP  
Reference Voltage Output with 1% Accuracy  
External Reference Input with Soft-Start (RISS)  
Embedded One-Bit VID Control  
Programmable OCP Threshold  
Programmable Switching Frequency  
Reference Tracking UVP/OVP Protection  
Shoot Through Protection and Short Pulse Free  
Technology  
Applications  
Middle to High End GPU Core Power  
High End Desktop PC Memory Core Power  
Low Voltage, High CurrentDC/DC Converter  
Voltage Regulator Modules  
RoHS Compliant and Halogen Free  
Pin Configurations  
(TOP VIEW)  
Ordering Information  
RT8809A/B  
Package Type  
QW : WQFN-24L 4x4 (W-Type)  
24 23 22 21 20 19  
1
2
3
4
5
6
18  
17  
16  
15  
14  
13  
VSET  
VREF  
EN/MSEL  
RMPSET  
COMP  
VCC  
VDD  
LGATE1  
PHASE1  
UGATE1  
BOOT1  
Lead Plating System  
G : Green (Halogen Free and Pb Free)  
Z : ECO (Ecological Element with  
Halogen Free and Pb free)  
PGND  
25  
FB  
A : With Droop Function  
7
8
9 10 11 12  
B : Without Droop Function  
Note :  
Richtek products are :  
WQFN-24L 4x4  
RoHS compliant and compatible with the current require-  
ments of IPC/JEDEC J-STD-020.  
Suitable for use in SnPb or Pb-free soldering processes.  
Copyright 2016 Richtek Technology Corporation. All rights reserved.  
©
is a registered trademark of Richtek Technology Corporation.  
DS8809A/B-03 January 2016  
www.richtek.com  
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