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RT8204B

更新时间： 2024-01-30 13:03:55
品牌 Logo 应用领域
立锜 - RICHTEK 控制器TI的电源Demo板
页数 文件大小 规格书
19页 405K
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RT8204B 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)：0.34Features：Adjustable Current Limit;Adjustable Frequency;COT Control;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;OVP;Power Good;SCP;Selectable (PSM or PWM);UVP
Package Type：WQFN3x3-16

RT8204B 数据手册

 浏览型号RT8204B的Datasheet PDF文件第2页浏览型号RT8204B的Datasheet PDF文件第3页浏览型号RT8204B的Datasheet PDF文件第4页浏览型号RT8204B的Datasheet PDF文件第5页浏览型号RT8204B的Datasheet PDF文件第6页浏览型号RT8204B的Datasheet PDF文件第7页 
RT8204A  
Single Synchronous Buck with LDO Controller  
General Description  
Features  
z PWM Controller  
The RT8204APWM controller provides the 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.  
` Ultra-High Efficiency  
` Resistor Programmable Current Limit by Low Side  
RDS(ON) Sense (Lossless Limit) or Sense Resistor  
(High Accuracy)  
` Quick Load Step Response within 100ns  
` 1% VOUT Accuracy Over Line and Load  
` Adjustable 0.75V to 3.3V Output Range  
` 3V to 26V Battery Input Range  
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.  
` Resistor Programmable Frequency  
` Over/Under Voltage Protection  
The RT8204Aachieves 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 the highest  
possible efficiency. The RT8204Ais intended for CPU core,  
chipset, DRAM, or other low voltage supplies as low as  
0.75V.  
` 2 Steps Current Limit During Soft-Start  
` Drives Large Synchronous-Rectifier FETs  
` Power Good Indicator  
z LDO Controller  
` 1.5% Accuracy Over Line and Load  
` Adjustabe Output Voltage down to 0.75V  
` Independent Enable and Power Good Indicator  
` Drive N-MOSFETs within Rail to Rail Controller  
Voltage  
Abuilt-in LDO controller can drive an externalN-MOSFET  
to provide a second output voltage from PWM output or  
other power source. The RT8204Acan provide adjustable  
voltage down to 0.75V and maximum output voltage is  
depended on the selected MOSFET. The internal 0.75V  
reference voltage with 1.5% accuracy provides tight  
regulation for the output voltage. The independent enable  
control, open drain power good indicator, under-voltage  
protection and soft start make RT8204A to power the  
system friendly. The RT8204A is available in WQFN-16L  
3x3 package.  
` MLCC and POSCAP Stable  
z RoHS Compliant and 100% Lead (Pb)-Free  
Ordering Information  
RT8204A  
Package Type  
QW : WQFN-16L 3x3 (W-Type)  
Lead Plating System  
P : Pb Free  
G : Green (Halogen Free and Pb Free)  
Note :  
Applications  
Richtek products are :  
z Notebook Computers  
` RoHS compliant and compatible with the current require-  
ments of IPC/JEDEC J-STD-020.  
z CPU Core Supply  
z Chipset/RAM Supply as Low as 0.75V  
` Suitable for use in SnPb or Pb-free soldering processes.  
Marking Information  
For marking information, contact our sales representative  
directly or through a Richtek distributor located in your  
area.  
DS8204A-05 April 2011  
www.richtek.com  
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