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CMOS LOW DROPOUT REGULATORS
FSP2114
FEATURES
Up to 250mA Output Current Below 60A Supply Current 3% Voltage Accuracy 400mA Current Limit with Foldback Protection 1.5V to 4V Fixed Output Voltages Stable with Wide Range of Capacitance Compact SOT23-3L and SOT89-3L Packages
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.
APPLICATIONS
Cellular Handsets Battery-Powered Equipment Personal Communication Devices Portable Information Devices Peripherals, Consumer Electronics
PIN CONFIGURATION
(Top View) (Top View)
GND
1
FSP2114
OUT 2
3
IN
FSP2114
1 GND 2 IN 3 OUT
PIN DESCRIPTION
Pin Number SOT23-3L SOT89-3L 1 1 2 3 3 2 Pin Name GND OUT IN Ground Output Input Voltage Pin Function
Typical Application Circuits
Figure 1 Typical Application Circuit
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CMOS LOW DROPOUT REGULATORS
FSP2114
ABSOLUTE MAXIMUM RATINGS
Parameter Input Supply Voltage OUT Voltage Continuous OUT Current Maximum Power Dissipation ( TA = 75C) Junction to Ambient Thermal Resistance (JA) Operating Junction Temperature Storage Temperature Rating -0.3 to +6 -0.3 to VIN + 0.3 Internally limited 0.38 (SOT23-3L) 0.55 (SOT89-3L) 200 (SOT23-3L) 130 (SOT89-3L) -40 to 150 -55 to 125 Unit V V A W / W C C C
Lead Temperature (Soldering, 10 sec) 300 Note: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
(VIN = Greater of 4V or VOUT + 0.5V to 5.5V, IOUT = 1mA, COUT = 1F, TJ = 25C unless otherwise specified.) Parameter Output Voltage Accuracy Input Voltage Range Line Regulation Load Regulation Supply Current Dropout Voltage (Note1) Current Limit (Note 2) IQ VDO ILIM VIN = VOUT + 1.0V to 5.5V, IOUT = 40mA IOUT = 1mA to 60mA No Load VO1.8VIOUT = 40mA 1.8V ELECTRICAL CHARACTERISTICS
250 150
Current Limit Short Circuit VOUT =0 V 100 mA ILIMSC Foldback Stable COUT 1 20 F Note 1Dropout 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 2Current Limit is measured at by forcing output voltage to 95% of regulation voltage.
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FUNCTIONAL BLOCK DIAGRAM
FSP2114
IN
CURRENT SENSE
OUT
THERMAL SHUTDOWN
REFERENCE & BIAS
G
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 incorporates reference and bias circuitry, error amplifier, feedback voltage resistor divider, 2 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 circuitry prevents the output current from increasing further. This current limit value is typically 400mA for output voltage higher than 2V, and decreases for lower output voltage parts (see Typical Performance Characteristics). As the output voltage 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 1F 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 1F, and an ESR value between 10m and 500m. High quality ceramic capacitors with X7R or X5R dielectric types are strongly recommended.
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TYPICAL PERFORMANCE CHARACTERISTICS
(Circuit of Figure 1, capacitors = 1F X7R, VIN = 3.3V, TA = 25C unless otherwise specified.)
FSP2114
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CMOS LOW DROPOUT REGULATORS
FSP2114
TYPICAL PERFORMANCE CHARACTERISTICSCONTINUED
(Circuit of Figure 1, capacitors = 1F X7R, VIN = 3.3V, TA = 25C unless otherwise specified.)
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CMOS LOW DROPOUT REGULATORS
FSP2114
ORDERING INFORMATION
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
MARKING INFORMATION
(1) SOT23-3L (2) SOT89-3L
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FSP2114
PACKAGE INFORMATION
(1) SOT23-3L
D
b
3
E1
A2 A1
1 e1
e
2
E
A
C L L1
Symbol A A1 A2 b C D E E1 L L1 e1 e
Dimensions In Millimeters Min. Max. 1.050 1.250 0.000 0.100 1.050 1.150 0.300 0.400 0.100 0.200 2.820 3.020 2.650 2.950 1.500 1.700 0.300 0.600 0.700REF 0.95 Bsc. 1.90 Bsc. 0 8
Dimensions In Inches Min. Max. 0.041 0.049 0.000 0.004 0.041 0.045 0.012 0.016 0.004 0.008 0.111 0.119 0.104 0.116 0.060 0.068 0.012 0.024 0.028REF 0.038 Bsc. 0.076 Bsc. 0 8
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FSP2114
(2) SOT89-3L
D D1
E
b1
HE
A
e1
b
e
Symbol A b b1 C D D1 E HE e1 e L
Dimensions In Millimeters Min. Max. 1.400 1.600 0.320 0.520 0.400 0.580 0.350 0.440 4.400 4.600 1.550 REF. 2.300 2.600 3.940 4.250 1.500 TYP 3.000 TYP 0.900 1.200
L
C
Dimensions In Inches Min. Max. 0.055 0.063 0.013 0.020 0.016 0.023 0.014 0.017 0.173 0.181 0.061 REF. 0.091 0.102 0.155 0.167 0.060 0.118 0.035 0.047
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