MP20045 datasheet(4/13 Pages) MPS

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MP20045 – LOWER NOISE, 1A LINEAR REGULATOR

MP20045 Rev. 1.0

www.MonolithicPower.com

10/13/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

ELECTRICAL CHARACTERISTICS

VIN=VOUT+0.5V or VIN=2.5V, EN=VIN, Typical values are at TA=+25°C, unless otherwise specified

Parameter

Condition

Min

Typ

Max

Units

Input Voltage

2.5

5.5

Input Under voltage Lockout

VIN rising

2.0

2.3

Hysteresis of UVLO

160

FB Accuracy

Adjustable

IOUT=1mA

-2.5

2.5

1.5V

IOUT=1mA, 2.5V<VIN<5.5V

-2.5

2.5

1.8V

IOUT=1mA, 2.5V<VIN<5.5V

-2.5

2.5

2.5V

IOUT=1mA, 3V<VIN<5.5V

-2.5

2.5

Output

Voltage

Accuracy

3.3V

IOUT=1mA, 3.8V<VIN<5.5V

-2.5

2.5

Maximum Output Current

Continuous, VIN>=3V

Short-Circuit Current Limit

VOUT=0, VIN>=3V

1.6

In-Regulation Current Limit

VOUT within 4% of normal output

voltage VIN=5.5V

1.4

2.2

3.0

Ground Current

IOUT=100µA

110

µA

Dropout Voltage

(5)

IOUT=1A

140

280

Line Regulation

(6)

VIN from VOUT+0.5V to 5.5V, IOUT=5mA

-0.15

0.15

%/V

Load Regulation

(7)

IOUT from 1mA to 1A

-0.3

Output Voltage Noise

VIN=3.3V, VOUT=2.8V, COUT=2.2µF,

IOUT=100mA, f ranges from 10Hz to

100kHz

µVRMS

PSRR

At 1kHz, IOUT=250mA

Shutdown Supply Current

VIN=+5.5V

µA

EN Logic High

1.5

EN PIN Threshold

EN Logic Low

0.4

EN pin PULL-UP resistor

550k

1.1M

Ω

Thermal Shutdown Temperature

Typical thermal hysteresis =20°C

150

°C

Minimum input voltage

IOUT(PG)=300µA

1.1

1.3

Trip threshold voltage

MP20045

MP20045-15

MP20045-18

MP20045-25

VOUT decreasing

MP20045-33

%VOUT

Hysteresis voltage

Measured at VOUT

%VOUT

Output low voltage

IOUT(PG)=1mA

0.15

0.4

Leakage current

V(PG)=5.5V

µA

Notes:

5) Dropout Voltage is defined as the input to output differential when the output voltage drops 100mV below its nominal value.

6) Line Regulation=

()

IN(MAX )

IN(MIN)

OUT V

IN(MIN)

OUT(NOM)

IN MAX

100(% / V)

⎡⎤

⎡

⎤

⎣⎦

⎣

⎦

−

⎡⎤

−×

⎣⎦

7) Load Regulation=

()

OUT (MAX )

OUT(MIN)

OUTI

OUT NOM

100(%)

⎡⎤

⎡

⎤

⎣⎦

⎣

⎦

−

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