MP1472 datasheet(3/13 Pages) MPS

部品番号	MP1472

部品情報	2A, 18V Synchronous Rectified Step-Down Converter

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メーカー	MPS [Monolithic Power Systems]

ホームページ	http://www.monolithicpower.com

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MP1472 – 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER

MP1472 Rev. 1.0

www.MonolithicPower.com

3

9/2/2011

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

ELECTRICAL CHARACTERISTICS

VIN = 12V, TA = +25°C, unless otherwise noted.

Parameter

Symbol Condition

Min

Typ

Max

Units

Shutdown Supply Current

VEN = 0V

1

3.0

μA

Supply Current

VEN = 5.0V; VFB = 1.0V

1.3

1.5

mA

Feedback Voltage

VFB

4.75V

 VIN  18V

0.900

0.923

0.946

V

Feedback Overvoltage Threshold

1.1

V

Error Amplifier Voltage Gain

(5)

AEA

400

V/V

Error Amplifier Transconductance

GEA

IC = 10μA

800

μA/V

High-Side Switch On Resistance

(5)

RDS(ON)1

175

mΩ

Low-Side Switch On Resistance

(5)

RDS(ON)2

115

mΩ

High-Side Switch Leakage Current

VEN = 0V, VSW = 0V

10

μA

Upper Switch Current Limit

Minimum Duty Cycle

3

4.1

5.3

A

Lower Switch Current Limit

From Drain to Source

1.1

A

COMP to Current Sense

Transconductance

GCS

3.5

A/V

Oscillation Frequency

Fosc1

305

340

375

kHz

Short Circuit Oscillation Frequency

Fosc2

VFB = 0V

100

kHz

Maximum Duty Cycle

DMAX

VFB = 0.8V

90

%

Minimum On Time

(5)

220

ns

EN Shutdown Threshold Voltage

VEN Rising

1.1

1.5

2.0

V

EN Shutdown Threshold Voltage

Hysteresis

210

mV

EN Lockout Threshold Voltage

2.2

2.5

2.7

V

EN Lockout Hysterisis

210

mV

Input Under Voltage Lockout

Threshold

VIN Rising

3.40

3.80

4.20

V

Input Under Voltage Lockout

Threshold Hysteresis

210

mV

Soft-Start Current

VSS = 0V

6

μA

Soft-Start Period

CSS = 0.1μF

15

ms

Thermal Shutdown

(5)

160

°C

Note:

5) Guaranteed by design, not tested.

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