FOSLINK FSP2134U285AD 300ma high psrr low dropout cmos linear regulator Datasheet

300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR
FSP2134
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FEATURES
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Low dropout voltage: 180mV at 300mA (Vo=3.3V)
Quiescent current: Typ. 65µA
2% Voltage Accuracy
High PSRR: 70dB at 1KHz
Thermal Shutdown
Current Limiting
Excellent line and load regulation
Fast response
Short circuit protection
Low temperature coefficient
Shutdown current: 0.5µA
Space saving USP6 package
The FSP2134 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
USP6 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.
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APPLICATIONS
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Cordless phones
Cellular phones
Bluetooth earphones
Digital Cameras
Portable electronics
WLANs
MP3 players
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PIN CONFIGURATION
GENERAL DESCRIPTION
(Bottom View)
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PIN DESCRIPTION
Pin Number
Pin Name
1
2
3
4
5
6
IN
NC
OUT
BYP
GND
EN
Pin Function
Input
Not connected
Output
Bypass pin, need a 10µF capacitor connected to GND
Ground
Chip Enable (active high)
BLOCK DIAGRAM
2007-7-4
300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR
FSP2134
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TYPICAL APPLICATIONS CIRCUITS
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ABSOLUTE MAXIMUM RATINGS
Parameter
Input Supply Voltage
Output Current
Rating
+6
300
Unit
V
mA
Output Pin Voltage
GND-0.3 to VIN+0.3
V
ESD Rating
Class B
Internal Power Dissipation
100
mW
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
Note: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
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°C
300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR
„
FSP2134
ELECTRICAL CHARACTERISTICS
(VIN = VO + 1V, CIN = 1µF, CO = 2.2µF, TA= 25°C unless otherwise specified.)
PARAMETER
SYMBOL
Input Voltage
Output Voltage Accuracy
Output Current
Ground Current
Quiescent Current
VIN
VO
IO
IGND
IQ
Line Regulation
LNR
Load Regulation Error
Temperature Coefficient
Over Temperature Shutdown
Over Temperature Hystersis
LDR
TC
OTS
OTH
Power Supply Ripple Rejection
(with bypass Cap.)
PSRR
Power Supply Ripple Rejection
(without bypass Cap.)
PSRR
Dropout Voltage
VDO
EN Input High Threshold
EN Input Low Threshold
VIH
VIL
Output Noise
Vn
TEST CONDITIONS
MIN
IO= 1mA
Note1
-2
300
IO= 1mA to 300mA
IO= 0mA
IO= 1mA, VO < 2V
VIN =2.8V to 3.8V
IO= 1mA, 2≤ VO < 3.3V
VIN =VO + 0.5V to VO + 1V
IO= 1mA, VO ≥3.3V
VIN =VO + 0.5V to VO + 1V
IO = 1mA to 300mA
IO = 1mA
IO = 1mA
IO = 1mA
IO = 100mA
f=100Hz
CBYP = 10nF
f= 1KHz
Vo =1.8V
f= 10KHz
IO = 100mA
Vo =1.8V
TYP
MAX
UNIT
V
%
mA
70
65
5.5
+2
Note2
90
90
-0.15
0.1
0.15
-0.1
0.03
0.1
-0.4
0.2
0.4
-1
0.2
40
150
30
70
70
1
2.5 ≤ VO < 3.3V
VO ≥ 3.3V
VIN = 2.5V to 5V
VIN = 2.5V to 5V
70
60
40
850
370
180
IO = 300mA
CBYP =10nF, f = 10Hz to 100kHz
%
dB
1100
450
230
1.5
0.3
50
%/V
ppm/°C
°C
°C
50
f=100Hz
f= 1KHz
f= 10KHz
VO= 1.8V
µA
µA
mV
V
V
µVRMS
Shutdown Current
ISD
VEN = 0V
0.01
1
µA
Note 1:The minimum input voltage of the FSP2134 is determined by output voltage and dropout voltage. The
minimum input voltage is defined as:
VIN(MIN)=VO+VDROP
Note 2:Output current is limited by PD, maximum IO=PD/(VIN(MAX)-VO)
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300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR
FSP2134
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APPLICATION INFORMATION
Capacitor Selection and Regulator Stability
Similar to any low dropout regulator, the external capacitors used with the FSP2134 must be carefully selected for
regulator stability and performance.
Using a capacitor, CIN, whose value is>1μF at the FSP2134 input pin, the amount of the capacitance can be
increased without limit. Please note that the distance between CIN and the input pin of the FSP2134 should not
exceed 0.5 inch. Ceramic capacitors are suitable for the FSP2134. Capacitors with larger values and lower ESR
provide better PSRR and line-transient response.
The FSP2134 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 FSP2134 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 FSP2134. 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 FSP2134 is shutdown by pulling the EN input low, and is turned on by tying the EN input to VIN or leaving the
EN input floating.
Internal P-Channel Pass Transistor
The FSP2134 features a 0.75Ω P-Channel MOSFET device as a pass transistor. The P-MOS pass transistor
enables the FSP2134 to consume only 65μA 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 lowest usable supply voltage. The FSP2134 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 FSP2134 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 FSP2134 also has a built-in short circuit current
limit.
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300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR
„
FSP2134
TYPICAL PERFORMANCE CHARACTERISTICS
(VIN = VEN , CIN = 1µF, CO = 2.2µF , CBYP =10nF TA = 25°C unless otherwise specified.)
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300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR
FSP2134
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TYPICAL PERFORMANCE CHARACTERISTICS(CONTINUED)
(VIN = VEN , CIN = 1µF, CO = 2.2µF , CBYP =10nF TA = 25°C unless otherwise specified.)
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300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR
FSP2134
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TYPICAL PERFORMANCE CHARACTERISTICS(CONTINUED)
(VIN = VEN , CIN = 1µF, CO = 2.2µF , CBYP =10nF TA = 25°C unless otherwise specified.)
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300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR
FSP2134
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TYPICAL PERFORMANCE CHARACTERISTICS(CONTINUED)
(VIN = VEN , CIN = 1µF, CO = 2.2µF , CBYP =10nF TA = 25°C unless otherwise specified.)
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300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR
FSP2134
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TYPICAL PERFORMANCE CHARACTERISTICS(CONTINUED)
(VIN = VEN , CIN = 1µF, CO = 2.2µF , CBYP =10nF TA = 25°C unless otherwise specified.)
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300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR
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FSP2134
ORDERING INFORMATION
FSP2134XXXX
Package Type:
U: USP6
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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:
Packing:
A: Tape & Reel D: -40~85℃
MARKING INFORMATION
xxv
YM
XX: Product code
V: Output voltage
T: 4.0V
S: 3.8V
J: 3.3V
R: 3.1V
I: 3.0V
Q: 2.9V
H: 2.85V
G: 2.8V
D: 2.5V
C: 1.8V
P: 1.2V
Date code:
Y: Year (1=2001)
M: Month (1~9, O, N, D)
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300MA HIGH PSRR LOW DROPOUT CMOS LINEAR REGULATOR
FSP2134
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PACKAGE INFORMATION
2007-7-4
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