FOSLINK FSP2114C33AD Cmos low dropout regulator Datasheet

CMOS LOW DROPOUT REGULATORS
FSP2114
„
FEATURES
„
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Up to 250mA Output Current
Below 60µA 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
„
APPLICATIONS
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Cellular Handsets
Battery-Powered Equipment
Personal Communication Devices
Portable Information Devices
Peripherals, Consumer Electronics
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.
GENERAL DESCRIPTION
„
PIN CONFIGURATION
(Top View)
GND
1
FSP2114
OUT
„
(Top View)
3
2
1
2
3
GND
IN
OUT
PIN DESCRIPTION
Pin Number
SOT23-3L
SOT89-3L
1
1
2
3
3
2
„
FSP2114
IN
Pin Name
GND
OUT
IN
Pin Function
Ground
Output
Input Voltage
Typical Application Circuits
Figure 1 Typical Application Circuit
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2007-5-18
CMOS LOW DROPOUT REGULATORS
FSP2114
„
ABSOLUTE MAXIMUM RATINGS
Parameter
Input Supply Voltage
OUT Voltage
Rating
-0.3 to +6
-0.3 to VIN + 0.3
Unit
V
V
Continuous OUT Current
A
Operating Junction Temperature
Internally limited
0.38 (SOT23-3L)
0.55 (SOT89-3L)
200 (SOT23-3L)
130 (SOT89-3L)
-40 to 150
Storage Temperature
-55 to 125
Maximum Power Dissipation ( TA = 75°C)
Junction to Ambient Thermal Resistance (θJA)
W
℃/ W
°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.
„
°C
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
Output Voltage Accuracy
∆VOUT
Test Conditions
Input Voltage Range
Line Regulation
Load Regulation
Supply Current
IQ
Dropout Voltage (Note1)
VDO
Current Limit (Note 2)
ILIM
VIN = VOUT + 1.0V to 5.5V,
IOUT = 40mA
IOUT = 1mA to 60mA
No Load
VO≤1.8V,IOUT = 40mA
1.8V <VO<3.3V,IOUT = 40mA
VO≥3.3V,IOUT = 40mA
VOUT ≥ 2V
VOUT < 2V
Min
Typ
Max
Unit
-3
3
%
2.5
5.5
V
0.3
%/V
60
%/mA
µA
0.01
250
150
400
260
150
400
280
mV
mA
Current Limit Short Circuit
VOUT =0 V
100
mA
ILIMSC
Foldback
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.
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2007-5-18
CMOS LOW DROPOUT REGULATORS
„
FSP2114
FUNCTIONAL BLOCK DIAGRAM
IN
OUT
CURRENT
SENSE
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, 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 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 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.
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2007-5-18
CMOS LOW DROPOUT REGULATORS
„
FSP2114
TYPICAL PERFORMANCE CHARACTERISTICS
(Circuit of Figure 1, capacitors = 1µF X7R, VIN = 3.3V, TA = 25°C unless otherwise specified.)
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2007-5-18
CMOS LOW DROPOUT REGULATORS
FSP2114
„
TYPICAL PERFORMANCE CHARACTERISTICS(CONTINUED)
(Circuit of Figure 1, capacitors = 1µF X7R, VIN = 3.3V, TA = 25°C unless otherwise specified.)
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2007-5-18
CMOS LOW DROPOUT REGULATORS
FSP2114
„
ORDERING INFORMATION
FSP2114XXXX
Package:
C: SOT23-3L
Y: SOT89-3L
„
Packing:
A: Tape & Reel
Temperature Grade:
D: -40~85℃
MARKING INFORMATION
(1) SOT23-3L
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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
(2) SOT89-3L
2007-5-18
CMOS LOW DROPOUT REGULATORS
FSP2114
„
PACKAGE INFORMATION
(1) SOT23-3L
D
b
A2
A
2
A1
1 e1
E
E1
3
e
C
θ
L
L1
Symbol
A
A1
A2
b
C
D
E
E1
L
L1
e1
e
θ
7/8
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.
0º
8º
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.
0º
8º
2007-5-18
CMOS LOW DROPOUT REGULATORS
FSP2114
(2) SOT89-3L
D
L
C
A
b1
HE
E
D1
b
e1
e
Symbol
A
b
b1
C
D
D1
E
HE
e1
e
L
8/8
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
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
2007-5-18
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