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RN5RK231B-TL-F PDF预览

RN5RK231B-TL-F

更新时间: 2024-11-27 18:53:31
品牌 Logo 应用领域
理光 - RICOH /
页数 文件大小 规格书
23页 380K
描述
Switching Regulator/Controller

RN5RK231B-TL-F 技术参数

是否Rohs认证: 符合生命周期:Active
包装说明:,Reach Compliance Code:unknown
风险等级:5.77湿度敏感等级:1
Base Number Matches:1

RN5RK231B-TL-F 数据手册

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RN5RK SERIES  
VFM STEP-UP DC/DC CONVERTER  
OUTLINE  
NO.EA-045-0602  
The RN5RKxx1A/xx1B/xx2A Series are CMOS-based VFM (Chopper) Step-up DC/DC converter ICs with ultra  
low supply current and high output voltage accuracy.  
Each of the RN5RKxx1A/xx1B consists of an oscillator, a VFM control circuit, a driver transistor to have low  
ON resistance (Lx switch), a reference voltage unit, a high speed comparator, resistors for voltage detection, an  
Lx switch protection circuit and an internal chip enable circuit. A low ripple, high efficiency step-up DC/DC  
converter can be composed of this RN5RKxx1A/xx1B with only three external components: an inductor, a diode  
and a capacitor.  
The RN5RKxx2A uses the same chip as what is employed in the RN5RKxx1A/1B IC and has a drive pin (EXT)  
for an external transistor instead of an Lx pin. As it is possible to load a large output current with a power  
transistor which has a low saturation voltage, RN5RKxx2A IC is recommendable to users who need an output  
current as large as between several tens mA and several hundreds mA.  
Using the chip enable function, it is possible to make the supply current on standby minimized.  
Since the package for these ICs is SOT-23-5 (Mini-mold), high density mounting of the ICs on board is  
possible.  
FEATURES  
Small Number of External Components .............................. Only an inductor, a diode and a capacitor  
(RN5RKxx1A/xx1B)  
Standby Current................................................................... Typ. 0µA  
High Output Voltage Accuracy .............................................±2.5%  
Low Ripple and Low Noise  
Low Start-up Voltage............................................................Max.0.9V  
High Efficiency .....................................................................Typ. 80%  
Including a Driver Transistor with Low ON Resistance........Only RN5RKxx1A/xx1B  
Two Kinds of Duty Ratio.......................................................77% (xx1A, xx2A)/ 55% (xx1B)  
Output Voltage Range.......................................................... 2.0V to 5.5V  
Low Temperature-Drift Coefficient of Output Voltage........... Typ. ±100ppm/°C  
Small Packages ................................................................. SOT-23-5 (Mini-Mold)  
APPLICATIONS  
Power source for battery-powered equipment.  
Power source for cameras, camcorders, VCRs, and hand-held communication equipment.  
Power source for those appliances which require higher cell voltage than that of batteries.  
1

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