LDO513

LDO_513 IP Library: Power Supply Range 2.9V to 13V, Low Power, 50mA Low Dropout Voltage Regulator PRODUCT PREVIEW s s s s s s s s 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 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. 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 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. Figure 2 : Typical Application Circuit IN IN ? ? OUT PWRDWN STDBY ? ? VREF V5V ? LDO_513 VIN ? ? OUT VOUT Power Down Mode ON OFF Stand-by Mode Stand-by Mode → → Active Mode → → PWRDWN 1 µF ? LDO_513 ESR COUT STDBY ? ? ? V5V GND 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 Input Voltage Range (Note 1) Output Voltage Output Voltage Accuracy Output current Dropout Voltage IOUT ∆VDO ∆VOUT = 50mV, ILOAD = 50mA (Note 2) Quiescent current IQ ILOAD = 100µA ILOAD = 10mA ILOAD = 50mA Power down mode quiescent current Power Supply Rejection Ratio IQPDM PSRR Power down active DC f = 10KHz Line Regulation Load Regulation Line Transient Load Transient Output Noise Voltage LIR LDR LIRT LDTR en ILOAD = 50mA, VIN = 3V to 13V ILOAD = 100µA - 50mA ∆VIN = 300mV tRISE = tFALL = 10µs ILOAD=100µA - 50mA in 10µs 100Hz 1KHz 10KHz 100KHz enRMS Output decoupling Capacitor Settling time Short Circuit Current Limit ISHORT COUT From power down to active mode 100 BW : 100Hz to 100KHz 1.2 400 150 70 35 1 120 220 µVRMS µF µs mA 6 mV µV ----------Hz nV ----------Hz 40 3 mV mV 45 40 200 40 100 270 100 60 60 3 mV 340 nA dB µA VIN Vout Symbol Test Condition Min. 2.9 1.8 3 50 70 Typ. Max. 13 5 Unit V V % mA mV 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. Max. 500 ILOAD = 500µA f = 10KHz 20 70 40 Unit µA µA dB Output current in stand-by mode IOUTSTDBY Quiescent Current in stand-by mode Power Supply Rejection Ratio in stand-by mode ISTDBY PSRRSTY TYPICAL CHARACTERISTICS Figure 3 : PSRR vs Frequency for Various Voltage Drop (ILOAD = 50mA) -30 -40 PSRR (dB) 170m V -50 200m V 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