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RT8209P

更新时间： 2024-02-17 19:37:08
品牌 Logo 应用领域
立锜 - RICHTEK /
页数 文件大小 规格书
17页 311K
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RT8209P 技术参数

Status：ActiveVs (typ) (V)：5
Vin (min) (V)：4.5Vin (max) (V)：26
Vout (min) (V)：0.75Vout (max) (V)：3.3
Preset Vout (V)：Output Adj. Method：Resistor
Accuracy (+/- %)：1Freq (typ) (kHz)：300
Freq (min) (kHz)：200Freq (max) (kHz)：600
Iq (typ) (mA)：0.5Features：Adjustable Current Limit;Adjustable Frequency;Built-in Bootstrap Switch;COT Control;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;OVP;Power Good;SCP;Selectable (PSM or PWM);UVP
Package Type：WQFN3.5x3.5-14

RT8209P 数据手册

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®
RT8209N/P  
Single Synchronous Buck Controller  
General Description  
Features  
z Ultra High Efficiency  
The RT8209N/P PWM controller provides high efficiency,  
excellent transient response, and highDC output accuracy  
needed for stepping down high voltage batteries to  
generate low voltage CPU core, I/O, and chipset RAM  
supplies in notebook computers.  
z Resistor Programmable Current Limit by Low Side  
RDS(ON) Sense (Lossless Limit)  
z 4700ppm/°C Current Sensing  
z Quick Load Step Response within 100ns  
z 1% VFB Accuracy over Line and Load  
z 4.5V to 26V Battery Input Range  
z Resistor Programmable Frequency  
z Integrated Bootstrap Switch  
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.  
z Integrated Negative Current Limiter  
z Over/Under Voltage Protection  
The RT8209N/P 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 low voltage  
supplies as low as 0.75V. The RT8209N is in a WQFN-  
16L 3x3 package, the RT8209P is in a WQFN-14L 3.5x3.5  
package.  
z Internal Soft-Start and Soft-Discharge Output  
z Power Good Indicator  
z RoHS Compliant and Halogen Free  
Applications  
z Notebook Computers  
z System Power Supplies  
z I/O Supplies  
Pin Configurations  
Ordering Information  
RT8209  
(TOP VIEW)  
Package Type  
16 15 14 13  
QW : WQFN-16L 3x3 (W-Type)  
QW : WQFN-14L 3.5x3.5 (W-Type)  
1
2
3
4
12  
11  
10  
9
VOUT  
VDD  
UGATE  
PHASE  
CS  
NC  
Lead Plating System  
FB  
17  
G : Green (Halogen Free and Pb Free)  
Z : ECO (Ecological Element with  
Halogen Free and Pb free)  
PGOOD  
VDDP  
5
6
7
8
N : WQFN-16L 3x3  
P : WQFN-14L 3.5x3.5  
RT8209N  
WQFN-16L 3x3  
Note :  
Richtek products are :  
` 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.  
1
7
14  
2
13  
TON  
UGATE  
3
4
5
6
12  
11  
10  
9
VOUT  
VDD  
PHASE  
CS  
VDDP  
LGATE  
NC  
15  
FB  
PGOOD  
8
RT8209P  
WQFN-14L 3.5x3.5  
Copyright 2014 Richtek Technology Corporation. All rights reserved.  
©
is a registered trademark of Richtek Technology Corporation.  
DS8209N/P-06 January 2014  
www.richtek.com  
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