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| LDOC_515 IP Library: Very Low power, Very High PSRR 100mA Low Dropout Voltage Regulator PRODUCT PREVIEW s CMOS REGULATOR s VERY LOW CONSUMPTION : 170A FULL LOAD s VERY LOW DROPOUT VOLTAGE : 50mV s HIGH PSRR : 60dB s OUTPUT CURRENT : 100mA s NO CURRENT IN POWER DOWN MODE s SHORT CIRCUIT PROTECTION TYPICAL APPLICATIONS - Cellular and Cordless phones supplied by 1 cell Lithium-ion battery / 3 cells Ni-MH or Ni-Cd battery - PDA (Personal Digital Assistant) - Smart phone - Portable equipment - Supply for RF devices for cellular phone Figure 2 : Typical Application Circuit IN APPLICATION NOTE An external capacitor (COUT = 4.7F) with an equivalent serial resistance (ESR) in the range 0.02 to 0.6 is used for regulator stability. Figure 1 : Block Diagram IN ? ? OUT PWRDWN STDBY ? ? VREF LDOC_515 VIN ? ? OUT VOUT Power Down Mode ON OFF Stand-by Mode Stand-by Mode Active Mode PWRDWN 4.7F ? LDOC_515 ESR COUT STDBY ? ? GND June 2002 This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without notice. 1/4 LDOC_515 ELECTRICAL CHARACTERISTICS 3V < VIN < 5.5V, -30C < TA < +85C, COUT = 4.7F 20%, 20m < ESR < 0.6, ILOAD = 100mA. Typical case : VIN = 4V, T = 25C, COUT = 4.7F. Parameter Input Voltage Range (Note 1) Output Voltage Output Voltage Accuracy Output current Dropout Voltage IOUT VDO VOUT = 50mV, ILOAD = 100mA (Note 2) Quiescent current IQ ILOAD = 100A ILOAD = 100mA Power down mode quiescent current Power Supply Rejection Ratio IQPDM PSRR Power down active DC ; Dropout = 200mV f = 10KHz f = 100KHz Line Regulation Load Regulation Line Transient Load Transient Output Noise Voltage LIR LDR LIRT LDTR en ILOAD = 100mA, VIN = 3V to 5.5V ILOAD = 100A - 100mA VIN = 300mV tRISE = tFALL = 5s ILOAD = 100A - 100mA in 5s 100Hz 1KHz 10KHz enRMS Output decoupling Capacitor Settling time Short Circuit Current Limit ISHORT COUT ILOAD = 100mA BW : 100Hz to 100KHz 2 650 250 70 4.7 40 400 120 700 V ----------Hz nV ----------Hz VRMS F s mA 25 <1 1 35 1.5 2 mV mV mV 40 35 150 30 170 100 60 55 40 2.5 3.5 mV 40 220 nA dB A Symbol V IN VOUT Test Condition Min. 3 2.8 3 100 50 Typ. Max. 5.5 Unit V V % mA mV Notes: 1. Above characteristics are given for 3V minimum input operating range voltage, but regulator is operational with 2.7V minimum input voltage. 2. All parameters are guaranteed with 150mV min Dropout voltage. 2/4 LDOC_515 3/4 LDOC_515 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 2002 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States http://www.st.com 4/4 |
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