RN5RF Series LDO with External Tr. The RN5RF Series are CMOS-based LDO regulators with external power transistor. By using an external PNP transistor, a low dropout voltage regulator ranging from several tens of mA to several hundreds mA can be configured. (Use a low saturation type PNP transistor with hFE of approximately 100 to 300.) FEATURES * Supply Current (ISS) ************************Typ. 30A (VIN=SET VOUT+1V) * Standby Current (Istandby) *****************Typ. 0.1A (VIN=10V, In standby) * Dropout Voltage (VDIF) ********************Typ. 0.1V (IOUT=100mA, VOUT=2.8V) * Ripple Rejection (RR)*********************Typ. 60dB (f=1kHz, VOUT > = 1.6V) * Output Voltage Accuracy**************** 2% * Temp. coeff. of Output Voltage******* Typ. 100ppm/C * Line Regulation ****************************** Typ. 0.05%/V * Fold-back Protection Circuit *********** Current limit Typ. 8mA * * * Package ***************************************** SOT-23-5 Typ. 50dB (f=1kHz, VOUT < = 1.5V) Input Voltage Range (VIN) ***************1.8V to 10.0V Output Voltage Range (VOUT)**********1.2V to 6.0V (internally fixed) (Base current limit of PNP Tr.) ) The value depends on the capacity of the external PNP transistor. BLOCK DIAGRAMS RN5RFxxA RN5RFxxB ( CE pin "L" active) (CE pin "H" active) 4 VDD 2 EXT EXT 4 3 VOUT VDD 2 3 - - + + Vref VOUT Vref Current Limit CE 5 Current Limit 1 GND SELECTION GUIDE CE 5 1 GND TYPICAL APPLICATION Package Quantity per Reel Part No. SOT-23-5 3,000 pcs RN5RF .xx A-TR-F .xx. : Specify the output voltage within the range 1.2V (.12.) to 6.0V (.60.) in 0.1V steps. .. : Select the polarity of the CE pin from (.A.) "L" active or (.B.) "H" active. PNP Tr 4 VDD 2 IN EXT VOUT RN5RFxxA OUT 3 + + C2 C1 CE 5 1 GND C1, C2 : Tantalum capacitor of 10F PNP transistor : 2SB766A PACKAGE (Top View) TYPICAL CHARACTERISTIC SOT-23-5 1 1 2 3 4 5 RN5RF30A Dropout Voltage vs. Output Current 0.5 4 2 3 GND VDD VOUT EXT CE or CE Dropout Voltage VDIF(V) 5 85C 25C -40C 0.4 0.3 0.2 0.1 0 0 100 200 300 400 500 Output Current IOUT(mA) APPLICATIONS * Power source for hand-held communication equipment, cameras, and VCRs * Power source for home appliances No.EK-072-091101 * Power source for battery-powered equipment CMOS LDO Regulator 1. The products and the product specifications described in this document are subject to change or discontinuation of production without notice for reasons such as improvement. Therefore, before deciding to use the products, please refer to Ricoh sales representatives for the latest information thereon. 2. 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