FSP2132 FOSLINK | Alldatasheet
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300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR 2007-8-6 1/11 FSP2132 A P P L I C A T I O N S z Cordless phones z Cellular phones z Bluetooth earphones z Digital Cameras z Portable electronics z WLANs z MP3 players PIN CONFIGURATION ( T o p V i e w ) PIN DESCRIPTION BLOCK DIAGRAM Pin Number Pin Name Pin Function
1 VIN Input
2 GND Ground
3 EN Chip Enable (active high)
4 BYP Bypass pin, need a 10µF capacitor connected to GND
5 VOUT Output
FEATURES z Low dropout voltage: 180mV at 300mA (Vo=3.3V) z Quiescent current: Typ. 65µA z 2% Voltage Accuracy z High PSRR: 70dB at 1KHz z Thermal Shutdown z Current Limiting z Excellent line and load regulation z Fast response z Short circuit protection z Low temperature coefficient z Shutdown current: 0.5µA z Space saving SOT23-5L package GENERAL DESCRIPTION The FSP2132 series of positive voltage linear regulators feature low quiescent current (Typ . 65µA) and low dropout voltage, making them ideal for battery powered applications. Their high PSRR make them useful in applications where AC noise on the input power supply must be suppressed. Space saving SOT23-5L package is attractive for portable and handheld applications. They have both thermal shutdown and a current limit feature to prevent device failure from extreme operating conditions. They are stable with an output capacitor of 2.2µF or greater.
300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR 2007-8-6 2/11 FSP2132 TYPICAL APPLICATIONS CIRCUITS ABSOLUTE MAXIMUM RATINGS Parameter Rating Unit Input Supply Voltage +6 V Output Current 300 mA Output Pin Voltage GND-0.3 to VIN+0.3 V ESD Rating Class B Internal Power Dissipation 400 mW Junction to Case Thermal Resistance (θJC) 130 ℃/ W Junction to Ambient Thermal Resistance (θJA) 250 ℃/ W Operating temperature -40 to 85 °C Operating Junction Temperature -40 to 125 °C Storage Temperature -65 to 150 °C Lead Temperature (Soldering, 5 sec) 300 °C Note: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR 2007-8-6 3/11 FSP2132 ELECTRICAL CHARACTERISTICS (VIN = VO + 1V, CIN = 1µF, CO = 2.2µF, TA= 25°C unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Input Voltage V IN Note1 5.5 V Output Voltage Accuracy V O I O= 1mA -2 +2 % Output Current I O 300 Note2 mA Ground Current I GND I O= 1mA to 300mA 70 90 µA Quiescent Current I Q I O= 0mA 65 90 µA IO= 1mA, VO < 2V IO= 1mA, 2≤ VO < 3.3V VIN =VO + 0.5V to VO + 1V -0.1 0.03 0.1 Line Regulation LNR IO= 1mA, V O ≥3.3V VIN =VO + 0.5V to VO + 1V -0.4 0.2 0.4 %/V Load Regulation Error LDR I O = 1mA to 300mA -1 0.2 1 % Temperature Coefficient T C I O = 1mA 40 ppm/°C Over Temperature Shutdown OTS I O = 1mA 150 °C Over Temperature Hystersis OTH I O = 1mA 30 °C f=100Hz 70 f= 1KHz 70 Power Supply Ripple Rejection (with bypass Cap.) PSRR IO = 100mA CBYP = 10nF Vo =1.8V f= 10KHz 50 f=100Hz 70 f= 1KHz 60 Power Supply Ripple Rejection (without bypass Cap.) PSRR IO = 100mA Vo =1.8V f= 10KHz 40 dB VO= 1.8V 850 1100 2.5 ≤ VO < 3.3V 370 450 Dropout Voltage V DO I O = 300mA VO ≥ 3.3V 180 230 mV EN Input High Threshold V IH V IN = 2.5V to 5V 1.5 V EN Input Low Threshold V IL V IN = 2.5V to 5V 0.3 V Output Noise V n C BYP =10nF, f = 10Hz to 100kHz 50 µVRMS Shutdown Current I SD V EN = 0V 0.01 1 µA Note 1：The minimum input voltage of the FSP2132 is determined by output voltage and dropout voltage. The minimum input voltage is defined as: V IN(MIN)=VO+VDROP Note 2：Output current is limited by PD, maximum IO=PD/(VIN(MAX)-VO)
300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR 2007-8-6 4/11 FSP2132 APPLICATION INFORMATION Capacitor Selection and Regulator Stability Similar to any low dropout regulator, the external capaci tors used with the FSP2132 must be carefully selected for regulator stability and performance. Using a capacitor, C IN, whose value is ＞1μF at the FSP2132 input pin, the amount of the capacitance can be increased without limit. Please note that the distance between C IN and the input pin of the FSP2132 should not exceed 0.5 inch. Ceramic capacitors are suitable for the FSP2132. Capacitors with larger values and lower ESR provide better PSRR and line-transient response. The FSP2132 is designed specifically to work with low ESR ceramic output capacitors in order to save space and improve performance. Using an output ceramic capacitor whose value is ＞2.2μF with ESR＞5mΩ ensure stability. A 10nF bypass capacitor connected to BYP pin is suggested for suppressing output noise. The capacitor, in series connection with an internal 200kΩ resistor, forms a low-pass filter for noise reduction. Increasing the capacitance will slightly decrease the output noise, but increase the start-up time. Load Transient Considerations The figure11 shows the FSP2132 load transient response. It shows two components the output response: a DC shift from the output impedance due to the load current change and transient response. The DC shift is quite small due to excellent load regulation of the FSP2132. The transient spike, resulting from a step change in the load current from 1mA to 300mA, is 20mV. The ESR of the output capacitor is critical to the transient spike. A larger capacitance along with smaller ESR results in a smaller spike. Shutdown Input Operation The FSP2132 is shutdown by pulling the EN input low, and is turned on by tying the EN i nput to VIN or leaving the EN input floating. Internal P-Channel Pass Transistor The FSP2132 features a 0.75 Ω P-Channel MOSFET device as a pass transistor. The P-MOS pass transistor enables the FSP2132 to consume only 65 μA of ground current during low dropout, light load, or heavy load operations. This feature increases the battery operation life time. Dropout Voltage A regulator’s minimum dropout voltage determines the lo west usable supply voltage. The FSP2132 has a typical 300mV dropout voltage. In battery powered systems, this will determine the useful end-of-life battery voltage. Current Limit and Short Circuit Protection The FSP2132 features a current limit, which monitors and controls the gate voltage of the pass transistor. The output current can be limited to 400mA by regulating the gate voltage. The FSP2132 also has a built-in short circuit current limit. Thermal Considerations Thermal protection limits power dissipation in the FSP2132. When the junction temperature exceeds 150 ℃, the OTP (Over Temperature Protection) starts the thermal shutdown and turns the pass transistor off. The pass transistor resumes operation after the junction temperature drops below 120℃. For continuous operation, the junction te mperature should be maintained below 125 ℃. The power dissipation is defined as : P D=(VIN-VOUT)*IO+VIN*IGND The maximum power dissipation depends on the thermal resi stance of IC package, PCB layout, the rate of surrounding airflow and temperature difference between junction and ambient. The maximum power dissipation can be calculated by the following formula: PD(MAX)=(TJ(MAX)-TA)/θJA Where TJ(MAX) is the maximum allowable junction temperature 125 ℃. TA is the ambient temperature and θJA is the thermal resistance from the junction to the ambient. For example, θJA is 250 ℃/W for the SOT23-5L package, based on the standard JEDEC 51-3 for a single layer thermal test board. The maximum power dissipation at TA=25℃ can be calculated by the following formula: It is also useful to calculated the junction temperature of the FSP2132 under a set of specific conditions. In this example let the input voltage V IN=3.3V, the output current IO=300mA and the case temperature TA=40℃ measured by a thermal couple during operation. The power dissipation for the V O=2.8V version of the FSP2132 can be calculated as: PD=(3.3V-2.8V)*300mA+3.3V*70μA 150mW≌ And the junction temperature, TJ, can be calculated as follows: TJ=TA+PD*θJA
300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR 2007-8-6 5/11 FSP2132 For this operating condition, TJ, is lower than the absolute maximum operating junction temperature, 125℃, so it is safe to use the FSP2132 in this configuration. TYPICAL PERFORMANCE CHARACTERISTICS (VIN = VEN , CIN = 1µF, CO = 2.2µF , CBYP =10nF TA = 25°C unless otherwise specified.)
300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR 2007-8-6 6/11 FSP2132 TYPICAL PERFORMANCE CHARACTERISTICS（CONTINUED） (VIN = VEN , CIN = 1µF, CO = 2.2µF , CBYP =10nF TA = 25°C unless otherwise specified.)
300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR 2007-8-6 7/11 FSP2132 TYPICAL PERFORMANCE CHARACTERISTICS（CONTINUED） (VIN = VEN , CIN = 1µF, CO = 2.2µF , CBYP =10nF TA = 25°C unless otherwise specified.)
300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR 2007-8-6 8/11 FSP2132 TYPICAL PERFORMANCE CHARACTERISTICS（CONTINUED） (VIN = VEN , CIN = 1µF, CO = 2.2µF , CBYP =10nF TA = 25°C unless otherwise specified.)
300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR 2007-8-6 9/11 FSP2132 TYPICAL PERFORMANCE CHARACTERISTICS（CONTINUED） (VIN = VEN , CIN = 1µF, CO = 2.2µF , CBYP =10nF TA = 25°C unless otherwise specified.)
300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR 2007-8-6 10/11 FSP2132 ORDERING INFORMATION MARKING INFORMATION XXVYW Date code: Y: Year W; Week Output Voltage: M: 4.0V O: 3.8V K: 3.3V P: 3.1V J: 3.0V Q: 2.9V I: 2.85V H: 2.8V G: 2.5V E: 1.8V B: 1.2V Product Code FSP2132XXXX Package Type: C: SOT23-5L Packing: A: Tape & Reel Output Voltage: 40: 4.0V 38: 3.8V 33: 3.3V 31: 3.1V 30: 3.0V 29: 2.9V 285: 2.85V 28: 2.8V 25: 2.5V 18: 1.8V 12: 1.2V Temperature Grade: D: -40~85℃
300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR 2007-8-6 11/11 FSP2132 PACKAGE INFORMATION Dimensions In Millimeters Dimensions In Inches Symbol Min. Max. Min. Max. A 0.889 1.295 0.036 0.052 A1 0.000 0.152 0.000 0.006 b 0.353 0.599 0.014 0.024 D 2.692 3.099 0.108 0.124 E 2.591 2.977 0.104 0.119 E1 1.397 1.803 0.056 0.072 e 0.838 1.041 0.034 0.042 D e b E 5 4 321 A