LDO517

LDO_517 IP Library: Wide Range ESR Capacitor, Low Noise, 100mA Low Dropout Voltage Regulator PRODUCT PREVIEW s AnyESR REGULATOR s VERY COMMON OUTPUT DECOUPLING CERAMIC CAPACITOR s s s s s s s LOW CONSUMPTION : 250µA FULL LOAD VERY LOW NOISE : 30µV VERY LOW DROPOUT VOLTAGE : 50mV HIGH PSRR : 60dB STANDBY AND POWER DOWN MODE NO CURRENT IN POWER DOWN MODE SHORT CIRCUIT PROTECTION APPLICATION NOTE An external capacitor (COUT = 1µF) with an equivalent serial resistance (ESR) up to 1Ω 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 LDO_517 VIN ? ? OUT VOUT Power Down Mode ON OFF Stand-by Mode Stand-by Mode → → Active Mode → → PWRDWN 1 µF ? LDO_517 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 LDO_517 ELECTRICAL CHARACTERISTICS 3V < VIN < 5.5V, -30°C < TA < +125°C, COUT = 1µF ±20%, ESR < 1 Ω, ILOAD = 100mA. Typical case : VIN = 4V, T = 25°C, COUT = 1µF. 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 = 100µA ILOAD = 100mA Power down mode quiescent current Power Supply Rejection Ratio IQPDM PSRR Power down active DC ; Dropout = 170mV 10KHz < f < 100KHz DC ; Dropout = 200mV 10KHz < f < 100KHz Line Regulation Load Regulation Line Transient Load Transient Output Noise Voltage (Note 3) LIR LDR LIRT LDTR en ILOAD = 100mA, VIN = 3V to 5.5V ILOAD = 100µA - 100mA ∆VIN = 300mV tRISE = tFALL = 10µs ILOAD = 100µA - 100mA in 10µs 100Hz 1KHz - 10KHz 100KHz enRMS Output decoupling Capacitor Settling time Short Circuit Current Limit ISHORT COUT ILOAD = 100mA 200 BW : 100Hz to 100KHz 1 20 400 800 80 70 85 30 nV ----------Hz µVRMS µF µs mA 3 mV 45 45 55 50 170 50 250 100 55 55 60 60 5 15 15 20 3 mV mV mV 65 450 nA dB µA Symbol VIN 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 2.5V minimum input voltage. 2. All parameters are guaranteed with 170mV min Dropout voltage. 3. Output Noise density reaches its maximum at 1MHz (300nV / H z typical). 2/4 LDO_517 ELECTRICAL CHARACTERISTICS : (STAND-BY MODE) 3V < VIN < 5.5V, -30°C < TA < +125°C, COUT = 1µF ±20%, ESR < 1 Ω, ILOAD = 500µA. Typical case : VIN = 4V, Ambient temperature, ILOAD = 500µA. Parameter Output current in stand-by mode Quiescent Current in stand-by mode Power Supply Rejection Ratio in stand-by mode Symbol IOUTSTDBY ISTDBY PSRRSTY ILOAD = 500µA DC ; Dropout > 1V f = 10KHz f = 100KHz Line Regulation in stand-by mode Load Regulation in stand-by mode LIRSTBY LDRSTBY VIN = 3V to 5.5V ILOAD = 100µA - 500µA 15 65 65 45 2 1 mV mV Test Condition Min. Typ. Max. 500 20 Unit µA µA dB TYPICAL CHARACTERISTICS Figure 3 : PSRR vs Dropout for Various Frequency (VOUT = 2.8V, Full Load) -50 -55 PSRR (dB) F=100KHz -60 F=10KHz -65 0.1 1 DROPOUT VOLATAGE (mV) 3/4 LDO_517 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