LDO_517 IP Library: Wide Range ESR Capacitor, Low Noise, 100mA Low Dropout Voltage Regulator PRODUCT PREVIEW ■ AnyESR REGULATOR ■ VERY COMMON OUTPUT DECOUPLING CERAMIC CAPACITOR ■ ■ ■ ■ ■ ■ ■ LOW CONSUMPTION : 250µA FULL LOAD 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 VERY LOW NOISE : 30µV VERY LOW DROPOUT VOLTAGE : 50mV HIGH PSRR : 60dB STANDBY AND POWER DOWN MODE IN ? PWRDWN ? STDBY ? ? OUT NO CURRENT IN POWER DOWN MODE 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 LDO_517 – 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 1µF ? → → Stand-by Mode ? COUT LDO_517 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 LDO_517 ELECTRICAL CHARACTERISTICS 3V < VIN < 5.5V, -30°C < TA < +125°C, COUT = 1µF ±20%, ESR < 1Ω, ILOAD = 100mA. Typical case : VIN = 4V, T = 25°C, COUT = 1µF. Parameter Input Voltage Range (Note 1) Output Voltage Symbol Test Condition VIN 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 170 ILOAD = 100µA 50 65 ILOAD = 100mA 250 450 100 nA dB Power down mode quiescent current IQPDM Power down active Power Supply Rejection Ratio PSRR DC ; Dropout = 170mV 45 55 10KHz < f < 100KHz 45 55 DC ; Dropout = 200mV 55 60 10KHz < f < 100KHz 50 60 Line Regulation LIR ILOAD = 100mA, VIN = 3V to 5.5V 5 15 mV Load Regulation LDR ILOAD = 100µA - 100mA 15 20 mV Line Transient LIRT ∆VIN = 300mV 3 mV 3 mV tRISE = tFALL = 10µs Load Transient LDTR ILOAD = 100µA - 100mA in 10µs Output Noise Voltage (Note 3) en enRMS Output decoupling Capacitor 80 1KHz - 10KHz 70 100KHz 85 BW : 100Hz to 100KHz ILOAD = 100mA ISHORT nV -----------Hz 30 COUT Settling time Short Circuit Current Limit 100Hz 200 µVRMS 1 µF 20 µs 400 800 mA 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 < 1Ω, ILOAD = 500µA. Typical case : VIN = 4V, Ambient temperature, ILOAD = 500µA. Parameter Symbol Output current in stand-by mode Test Condition Min. Typ. IOUTSTDBY Quiescent Current in stand-by mode ISTDBY Power Supply Rejection Ratio in stand-by mode PSRRSTY ILOAD = 500µA 15 DC ; Dropout > 1V 65 f = 10KHz 65 f = 100KHz 45 Max. Unit 500 µA 20 µA dB Line Regulation in stand-by mode LIRSTBY VIN = 3V to 5.5V 2 mV Load Regulation in stand-by mode LDRSTBY ILOAD = 100µA - 500µA 1 mV TYPICAL CHARACTERISTICS Figure 3 : PSRR vs Dropout for Various Frequency (VOUT = 2.8V, Full Load) -50 PSRR (dB) -55 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