FSP2114 FOSLINK | Alldatasheet
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CMOS LOW DROPOUT REGULATORS 2007-5-18 1/8 F S P 2 1 1 4 A P P L I C A T I O N S z Cellular Handsets z Battery-Powered Equipment z P ersonal Communication Devices z Portable Information Devices z Peripherals, Consumer Electronics PIN CONFIGURATION ( T o p V i e w ) ( T o p V i e w ) PIN DESCRIPTION Typical Application Circuits Figure 1 Typical Application Circuit Pin Number SOT23-3L SOT89-3L Pin Name Pin Function 1 1 GND Ground 2 3 OUT Output 3 2 IN Input Voltage FEATURES z Up to 250mA Output Current z Below 60µA Supply Current z ±3% Voltage Accuracy z 400mA Current Limit with Foldback Protection z 1.5V to 4V Fixed Output Voltages z Stable with Wide Range of Capacitance z Compact SOT23-3L and SOT89-3L Packages FSP2114 123 GND IN OUT FSP2114 3 1GND IN OUT GENERAL DESCRIPTION The FSP2114 is a high performance low dropout voltage regulator designed for portable applications with low quiescent current and low dropout voltage. The FSP2114 has a typical current limit of 400mA and is capable of delivering up to 250mA output current. It is available in output voltages from 1.5V to 4V in 50mV increments. It features current limit with fold-back in short circuit. The FSP2114 is available in SOT23-3L and SOT89-3L packages. These products are ideal for portable information devices, cellular phones, and other battery powered applications.
CMOS LOW DROPOUT REGULATORS 2007-5-18 2/8 F S P 2 1 1 4 ABSOLUTE MAXIMUM RATINGS Parameter Rating Unit Input Supply Voltage -0.3 to +6 V OUT Voltage -0.3 to VIN + 0.3 V Continuous OUT Current Internally limited A 0.38 (SOT23-3L) Maximum Power Dissipation ( TA = 75°C) 0.55 (SOT89-3L) W 200 (SOT23-3L) Junction to Ambient Thermal Resistance (θJA) 130 (SOT89-3L) ℃/ W Operating Junction Temperature -40 to 150 °C Storage Temperature -55 to 125 °C Lead Temperature (Soldering, 10 sec) 300 °C Note: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. ELECTRICAL CHARACTERISTICS (VIN = Greater of 4V or VOUT + 0.5V to 5.5V, IOUT = 1mA, COUT = 1µF, TJ = 25°C unless otherwise specified.) Parameter Symbol Test Conditions Min Typ Max Unit Output Voltage Accuracy ∆VOUT -3 3 % Input Voltage Range 2.5 5.5 V Line Regulation VIN = VOUT + 1.0V to 5.5V, IOUT = 40mA 0.3 %/V Load Regulation I OUT = 1mA to 60mA 0.01 %/mA Supply Current I Q No Load 60 µA VO≤1.8V，IOUT = 40mA 400 1.8V <VO<3.3V，IOUT = 40mA 260 Dropout Voltage (Note1) V DO VO≥3.3V，IOUT = 40mA 150 mV VOUT ≥ 2V 250 400 Current Limit (Note 2) I LIM VOUT < 2V 150 280 mA Current Limit Short Circuit Foldback ILIMSC V OUT =0 V 100 mA Stable COUT 1 20 µF Note 1：Dropout Voltage is defined as the different voltage between input and output when the output voltage drops 100mV below the regulation voltage at 1V different voltage. Note 2：Current Limit is measured at by forcing output voltage to 95% of regulation voltage.
CMOS LOW DROPOUT REGULATORS 2007-5-18 3/8 F S P 2 1 1 4 FUNCTIONAL BLOCK DIAGRAM FUNCTIONAL DESCRIPTION The FSP2114 is a high performance LDO with low quiescent current consumption. As illustrated in the above Figure, Functional Block Diagram, the FSP2114 architecture inco rporates reference and bias circuitry, error amplifier, feedback voltage resistor divider, 2Ω P-channel power MOSFET pass transistor and current limiter. VOLTAGE REGULATION Normally, the LDO's error amplifier compares the output feedback voltage (via the resistor divider) with the reference voltage and generates an error signal that is used to drive the P-channel power MOSFET. When the output voltage is higher than the needed value, the P-channel is driven to maintain regulation. When the output voltage is lower than the needed value, the P-channel conducts to increase the output to its desired value. This negative feedback mechanism results in a constant regulated output voltage. CURRENT LIMIT When the output current is at the current limit value, the current limiter circ uitry prevents the output current from increasing further. This current limit value is typica lly 400mA for output voltage higher than 2V, and decreases for lower output voltage parts (see Typical Performance Charac teristics). As the output vo ltage decreases, the current limit value folds back gradually, eventually reaching 100mA at 0V. APPLICATION INFORMATION INPUT CAPACITOR Any good quality capacitor with a value of 1µF or more can be used as an input capacitor for this LDO. Connect the input capacitor as close to the IN and G as possible. Ceramic capacitors have better performance and lower ESR (Equivalent Series Resistance) than other types of capacitors, and are recommended. OUTPUT CAPACITOR The FSP2114 LDO requires an output capacitor for stability. This capacitor should be connected as close to OUT and G as possible to maximize the performance of the device. The output capacitance and ESR ranges for stability are shown in the Region of Stable COUT ESR vs. Output Current graph in Typical Performance Characteristics. However, to ensure the best performance for the device, the output capacitor should have a minimum capacitance of 1µF, and an ESR value between 10mΩ and 500mΩ. High quality ceramic capacitors with X7R or X5R dielectric types are strongly recommended. IN G THERMAL SHUTDOWN REFERENCE & BIAS OUT CURRENT SENSE
CMOS LOW DROPOUT REGULATORS 2007-5-18 4/8 F S P 2 1 1 4 TYPICAL PERFORMANCE CHARACTERISTICS (Circuit of Figure 1, capacitors = 1µF X7R, VIN = 3.3V, TA = 25°C unless otherwise specified.)
CMOS LOW DROPOUT REGULATORS 2007-5-18 5/8 F S P 2 1 1 4 TYPICAL PERFORMANCE CHARACTERISTICS（CONTINUED） (Circuit of Figure 1, capacitors = 1µF X7R, VIN = 3.3V, TA = 25°C unless otherwise specified.)
CMOS LOW DROPOUT REGULATORS 2007-5-18 6/8 F S P 2 1 1 4 ORDERING INFORMATION MARKING INFORMATION ( 1 ) S O T 2 3 - 3 L ( 2 ) S O T 8 9 - 3 L FSP2114XXXX Package: C: SOT23-3L Y: SOT89-3L Output Voltage: 15: 1.5V 18: 1.8V 25: 2.5V 26: 2.6V 27: 2.7V 28: 2.8V 285: 2.85V 30: 3.0V 33: 3.3V 35: 3.5V 36: 3.6V Packing: A: Tape & Reel Temperature Grade: D: -40~85℃
CMOS LOW DROPOUT REGULATORS 2007-5-18 7/8 F S P 2 1 1 4 PACKAGE INFORMATION (1) SOT23-3L Dimensions In Millimeters Dimensions In Inches Symbol Min. Max. Min. Max. A 1.050 1.250 0.041 0.049 A1 0.000 0.100 0.000 0.004 A2 1.050 1.150 0.041 0.045 b 0.300 0.400 0.012 0.016 C 0.100 0.200 0.004 0.008 D 2.820 3.020 0.111 0.119 E 2.650 2.950 0.104 0.116 E1 1.500 1.700 0.060 0.068 L 0.300 0.600 0.012 0.024 L1 0.700REF 0.028REF e1 0.95 Bsc. 0.038 Bsc. e 1.90 Bsc. 0.076 Bsc. θ 0 º 8º 0º 8º A L θ C D e b E
CMOS LOW DROPOUT REGULATORS 2007-5-18 8/8 F S P 2 1 1 4 (2) SOT89-3L Dimensions In Millimeters Dimensions In Inches Symbol Min. Max. Min. Max. A 1.400 1.600 0.055 0.063 b 0.320 0.520 0.013 0.020 b1 0.400 0.580 0.016 0.023 C 0.350 0.440 0.014 0.017 D 4.400 4.600 0.173 0.181 D1 1.550 REF. 0.061 REF. E 2.300 2.600 0.091 0.102 HE 3.940 4.250 0.155 0.167 e1 1.500 TYP 0.060 e 3.000 TYP 0.118 L 0.900 1.200 0.035 0.047 e L E HE D b C A