LDOC_515 IP Library: Very Low power, Very High PSRR 100mA Low Dropout Voltage Regulator PRODUCT PREVIEW ■ CMOS REGULATOR ■ VERY LOW CONSUMPTION : 170µA FULL LOAD ■ VERY LOW DROPOUT VOLTAGE : 50mV APPLICATION NOTE An external capacitor (COUT = 4.7µF) with an equivalent serial resistance (ESR) in the range 0.02 to 0.6Ω is used for regulator stability. Figure 1 : Block Diagram ■ HIGH PSRR : 60dB ■ OUTPUT CURRENT : 100mA ■ NO CURRENT IN POWER DOWN MODE IN ? PWRDWN ? STDBY ? ? OUT ■ SHORT CIRCUIT PROTECTION TYPICAL APPLICATIONS – Cellular and Cordless phones supplied by 1 cell Lithium-ion battery / 3 cells Ni-MH or Ni-Cd battery VREF – PDA (Personal Digital Assistant) – Smart phone – Portable equipment LDOC_515 – Supply for RF devices for cellular phone Figure 2 : Typical Application Circuit IN VIN Power Down Mode ON OFF PWRDWN ? Stand-by Mode → → Active Mode OUT VOUT 4.7µF ? → → Stand-by Mode ? COUT LDOC_515 ESR 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, -30°C < TA < +85°C, COUT = 4.7µF ±20%, 20mΩ < ESR < 0.6Ω, ILOAD = 100mA. Typical case : VIN = 4V, T = 25°C, COUT = 4.7µF. Parameter Input Voltage Range (Note 1) Output Voltage Symbol Test Condition V IN Min. 3 VOUT Output Voltage Accuracy Output current IOUT Dropout Voltage ∆VDO IQ Max. Unit 5.5 V 2.8 V 3 % ∆VOUT = 50mV, ILOAD = 100mA (Note 2) Quiescent current Typ. 100 mA 50 mV µA 150 ILOAD = 100µA 30 40 ILOAD = 100mA 170 220 Power down mode quiescent current IQPDM Power down active 100 nA Power Supply Rejection Ratio PSRR DC ; Dropout = 200mV 60 dB Line Regulation LIR f = 10KHz 40 55 f = 100KHz 35 40 ILOAD = 100mA, 2.5 3.5 mV VIN = 3V to 5.5V Load Regulation LDR ILOAD = 100µA - 100mA 25 35 mV Line Transient LIRT ∆VIN = 300mV tRISE = tFALL = 5µs <1 1.5 mV Load Transient LDTR ILOAD = 100µA - 100mA 1 2 mV in 5µs Output Noise Voltage en enRMS Output decoupling Capacitor 2 µV -----------Hz 1KHz 650 10KHz 250 nV -----------Hz BW : 100Hz to 100KHz 70 µVRMS 4.7 µF COUT ILOAD = 100mA Settling time Short Circuit Current Limit 100Hz ISHORT 40 120 µs 400 700 mA 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 © 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