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| LDOC_516 IP Library: High PSRR, Low Power, 100mA Low Dropout Voltage Regulator PRODUCT PREVIEW s s s s s s s s s CMOS REGULATOR VERY LOW DROPOUT VOLTAGE : 50mV LOW CONSUMPTION : 170A FULL LOAD LOW NOISE : 200V HIGH PSRR : 55dB OUTPUT CURRENT : 100mA SMALL OUTPUT DECOUPLING CAPACITOR NO CURRENT IN POWER DOWN MODE SHORT CIRCUIT PROTECTION APPLICATION NOTE An external capacitor (COUT = 1F) 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 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 LDOC_516 VIN ? ? OUT VOUT Power Down Mode ON OFF Stand-by Mode Stand-by Mode Active Mode PWRDWN 1F ? LDOC_516 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_516 ELECTRICAL CHARACTERISTICS 3V < VIN < 5.5V, -55C < TA < +125C, COUT = 1F 20%, 20m < ESR < 0.6, ILOAD = 100mA. Typical case : VIN = 4V, T = 25C, COUT = 1F. 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 1.2 400 200 60 1 15 400 40 700 mV V ----------Hz nV ----------Hz VRMS F s mA 20 25 1 mV mV 40 40 35 200 45 600 100 55 55 45 3.5 6.5 mV 65 750 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 200mV min Dropout voltage. 2/4 LDOC_516 3/4 LDOC_516 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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