LDO514

LDO_514 IP Library: High PSRR, Very Low power, 200mA Low Dropout Voltage Regulator PRODUCT PREVIEW s RF REGULATOR s VERY LOW DROPOUT VOLTAGE : 50mV s VERY LOW CONSUMPTION : 320µA FULL LOAD 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 1 : Block Diagram s s s s s VERY GOOD TRANSIENT BEHAVIOUR : 1mV OUTPUT CURRENT : 200mA HIGH PSRR : 65dB NO CURRENT IN POWER DOWN MODE SHORT CIRCUIT PROTECTION 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_514 VIN ? ? OUT VOUT Power Down Mode ON OFF Stand-by Mode Stand-by Mode → → Active Mode → → PWRDWN 1 µF ? LDO_514 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_514 ELECTRICAL CHARACTERISTICS 3V < VIN < 5.5V, -55°C < TA < +125°C, COUT = 1µF ±20%, 20mΩ < ESR < 0.6Ω, ILOAD = 200mA. 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 = 200mA (Note 2) Quiescent current IQ ILOAD = 100µA ILOAD = 20mA ILOAD = 200mA Power down mode quiescent current Power Supply Rejection Ratio IQPDM PSRR Power down active DC f = 10KHz f = 100KHz Line Regulation Load Regulation Line Transient Load Transient Output Noise Voltage LIR LDR LIRT LDTR en ILOAD = 200mA, VIN = 3V to 5.5V ILOAD = 100µA - 200mA ∆VIN = 300mV tRISE = tFALL = 10µs ILOAD = 100µA - 200mA in 10µs 100Hz 1KHz 10KHz enRMS Output decoupling Capacitor Settling time Short Circuit Current Limit ISHORT COUT ILOAD = 200mA BW : 100Hz to 100KHz 0.5 1400 450 150 45 1 15 800 30 nV ----------Hz µVRMS µF µs mA 1 mV 35