MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
ELECTRICAL CHARACTERISTICS
VIN=VOUT+0.5V or VIN=2.5V, EN=VIN, Typical values are at TA=+25°C, unless otherwise specified
Parameter
Input Voltage
Input Under voltage Lockout
Hysteresis of UVLO
Condition
Min
2.5
2.0
Typ
Max
5.5
2.3
Units
V
V
VIN rising
160
mV
FB Accuracy
Adjustable IOUT=1mA
-2.5
-2.5
-2.5
-2.5
1
2.5
2.5
2.5
2.5
1.5V
1.8V
3.3V
IOUT=1mA, 2.5V<VIN<5.5V
IOUT=1mA, 2.5V<VIN<5.5V
OUT=1mA, 3.8V<VIN<5.5V
%
Output
Accuracy
Voltage
I
Maximum Output Current
Short-Circuit Current Limit
Continuous, VIN>=3V
VOUT=0, VIN>=3V
VOUT within 4% of normal output
voltage VIN=5.5V
A
A
1.6
2.2
In-Regulation Current Limit
1.4
3.0
A
Ground Current
IOUT=100µA
IOUT=1A
110
140
µA
mV
Dropout Voltage(5)
280
VIN from VOUT+0.5V to 5.5V,
IOUT=5mA
IOUT from 1mA to 1A
VIN=3.3V, VOUT=2.8V, COUT=2.2uF,
IOUT=100mA, f ranges from 10Hz to
100kHz
Line Regulation(6)
Load Regulation(7)
-0.15
0.15
%/V
%
-0.3
13
Output Voltage Noise
µVRMS
PSRR
At 1kHz, IOUT=250mA
56
5
dB
µA
Shutdown Supply Current
VIN=+5.5V
16
EN Logic High
EN Logic Low
1.5
EN PIN Threshold
V
0.4
EN pin PULL-UP resistor
Thermal Shutdown Temperature
Minimum input voltage
550k
1.1M
150
1.1
Ω
°C
V
Typical thermal hysteresis =20°C
IOUT(PG)=300µA
1.3
86
83
Trip threshold voltage
VOUT
MP20045
80
77
%VOUT
decreasing
Measured at VOUT
IOUT(PG)=1mA
V(PG)=5.5V
MP20045-3.3
PG
Hysteresis voltage
6
0.15
%VOUT
V
µA
Output low voltage
Leakage current
Notes:
0.4
1
5) Dropout Voltage is defined as the input to output differential when the output voltage drops 100mV below its nominal value.
VOUT V
− VOUT V
⎡
IN(MIN)
⎣
⎡
⎤
⎤
⎦
IN(MAX)
⎣
⎦
6) Line Regulation=
× (% / V)
⎡
⎣
⎤
⎦
V
− V
)
× VOUT(NOM)
IN(MIN)
IN MAX
(
V
− V
⎡
⎤
⎦
⎡
⎤
OUT IOUT(MIN)
⎦
OUT IOUT(MAX)
⎣
⎣
7) Load Regulation=
× (%)
VOUT NOM
(
)
MP20045 Rev. 0.92
1/4/2010
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