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LDO51 Datasheet(PDF) 2 Page - STMicroelectronics

Part No. LDO51
Description  IP Library: High PSRR, Low power, 80mA Low Dropout Voltage Regulator
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LDO51 Datasheet(HTML) 2 Page - STMicroelectronics

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ELECTRICAL CHARACTERISTICS
3V < VIN < 5.5V, -55°C < TA < +125°C, VREF = 2.8V, 0.8µF < COUT < 1.2µF, 20mΩ < ESR < 0.6Ω.
100
µA < I
LOAD < 80mA.
Typical case : VIN = 4V, T = 25°C, IOUT = 40mA.
Notes: 1. Above characteristics are given for 3V minimum input operating range voltage, but regulator is
operational with 2.7V minimum input voltage.
2. All parameters are guaranteed with 170mV Dropout voltage.
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Input Voltage Range (Note 1)
VIN
3
5,5
V
Output Voltage
VOUT
2,8
V
Output Voltage Accuracy
-3
3
%
Output current
IOUT
0,1
80
mA
PMOS Output Resistance
RON
0,5
Dropout Voltage
∆V
DO
∆V
OUT = 50mV,
ILOAD = 80mA
50
mV
(Note 2)
170
Quiescent current
IQ
ILOAD = 100µA30
50
µA
ILOAD = 80mA
130
170
Power down mode
quiescent current
IQPDM
Power down active
100
nA
Power Supply Rejection Ratio
PSRR
f < 10KHz
50
60
dB
f < 100KHz
40
50
Line Regulation
Lir
ILOAD = 80mA,
VIN = 3V to 5.1V
36
mV
Load Regulation
Ldr
30
45
mV
Line Transient
Lirt
∆V
IN = 300mV
tRISE = tFALL = 10µs
1mV
Load Transient
Ldtr
10% to 90%
and 90% to 10%
of 80mA in 10
µs
1mV
Output Noise Voltage
en
100Hz
1,5
1KHz
550
100KHz
300
Output decoupling Capacitor
COUT
1
µF
Settling time
From power down to
active mode
25
µs
Short Circuit Current Limit
ISHORT
180
230
300
mA
µV
Hz
------------
nV
Hz
------------


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