LDO_513 IP Library: Power Supply Range 2.9V to 13V, Low Power, 50mA Low Dropout Voltage Regulator PRODUCT PREVIEW ■ ■ ■ ■ ■ ■ ■ ■ The regulator needs two separated power supplies, one (V5V) for the digital parts and programming inputs (Stand-by and Power-down mode) which cannot exceed 5V and one (Vin) as the input voltage of the regulator. CHARGE CONTROL REGULATOR VERY LOW DROPOUT VOLTAGE : 60mV LARGE INPUT VOLTAGE RANGE OUTPUT CURRENT : 50mA LOW QUIESCENT CURRENT : 280µA HIGH PSRR : 60dB NO CURRENT IN POWER DOWN MODE SHORT CIRCUIT PROTECTION Figure 1 : Block Diagram 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 Charge control devices of cellular phone IN ? PWRDWN ? STDBY ? ? OUT VREF ? V5V APPLICATION NOTE An external capacitor (COUT = 1µF) with an equivalent serial resistance (ESR) in the range 0.02 to 0.6Ω is used for regulator stability. LDO_513 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_513 ESR STDBY ? ? ? GND V5V 5V Power Supply 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_513 ELECTRICAL CHARACTERISTICS 2.9V < VIN < 13V, -30°C < TA < +85°C, COUT = 1µF ±20%, 20mΩ < ESR < 0.6Ω, ILOAD = 50mA. Typical case: VIN = 4V, T = 25°C, C OUT = 1µF. Parameter Symbol Test Condition Min. Typ. Max. Unit Input Voltage Range (Note 1) VIN 2.9 13 V Output Voltage Vout 1.8 5 V Output Voltage Accuracy 3 Output current IOUT Dropout Voltage ∆VDO ∆VOUT = 50mV, ILOAD = 50mA (Note 2) Quiescent current IQ mA 70 mV ILOAD = 100µA 40 ILOAD = 10mA 100 ILOAD = 50mA 270 100 nA dB IQPDM Power down active Power Supply Rejection Ratio PSRR DC 45 60 f = 10KHz 40 60 LIR 50 200 Power down mode quiescent current Line Regulation % ILOAD = 50mA, µA 340 3 mV VIN = 3V to 13V Load Regulation LDR ILOAD = 100µA - 50mA 40 mV Line Transient LIRT ∆VIN = 300mV 3 mV 6 mV tRISE = tFALL = 10µs Load Transient LDTR ILOAD=100µA - 50mA in 10µs Output Noise Voltage en 100Hz 1.2 1KHz 400 10KHz 150 100KHz 70 BW : 100Hz to 100KHz 35 µVRMS 1 µF enRMS Output decoupling Capacitor COUT Settling time Short Circuit Current Limit From power down to active mode ISHORT 100 µV -----------Hz nV -----------Hz 120 µs 220 mA Notes: 1. Above characteristics are given for 2.9V 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 LDO_513 ELECTRICAL CHARACTERISTICS : STAND-BY MODE 3V < VIN < 5.5V, -30°C < TA < +85°C, VREF = 2.8V, COUT = 4.7µF ±20%, 20mΩ < ESR < 0.6Ω. ILOAD = 500µA. Typical case : VIN = 4V, Ambient temperature, ILOAD = 500µA. Parameter Symbol Test Condition Min. Typ. Output current in stand-by mode IOUTSTDBY Quiescent Current in stand-by mode ISTDBY ILOAD = 500µA 20 Power Supply Rejection Ratio in stand-by mode PSRRSTY f = 10KHz 70 Max. Unit 500 µA 40 µA dB TYPICAL CHARACTERISTICS Figure 3 : PSRR vs Frequency for Various Voltage Drop (ILOAD = 50mA) -30 PSRR (dB) -40 170m V 200m V -50 300m V -60 1 10 100 1000 10000 100000 1000000 FREQUENCY (Hz) 3/4 LDO_513 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