MP9403 datasheet(3/13 Pages) MPS

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MP9403 – 3A, 7V, 250kHz INTEGRATED SYNCHRONOUS STEP-DOWN CONVERTER

MP9403 Rev.0.9

www.MonolithicPower.com

2/9/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

ELECTRICAL CHARACTERISTICS (5)

VIN = 5V, TA = +25°C, unless otherwise noted.

Parameter

Symbol Condition

Min

Typ

(5)

Max

Units

Shutdown Supply Current

VEN = 0V

1.0

μA

Supply Current

VEN = 2.7V, VFB = 1.0V

1.45

1.6

Feedback Voltage

VFB

4.3V

≤ VIN ≤ 7V,

TA = +25°C

0.780

0.800

0.820

OVP Threshold Voltage

0.90

0.95

1.00

Error Amplifier Voltage Gain

AEA

400

V/V

Error Amplifier Transconductance

GEA

ΔIC = ±10μA

550

820

1100

μA/V

High-Side Switch-On Resistance

RDS(ON)1

150

mΩ

Low-Side Switch-On Resistance

RDS(ON)2

100

mΩ

High-Side Switch Leakage Current

VEN = 0V, VSW = 0V

1.0

μA

Upper Switch Current Limit

Duty Cycle = 60%

3.4

4.3

Lower Switch Current Limit

From Drain to Source

1.25

COMP to Current Sense

Transconductance

GCS

A/V

Oscillation Frequency

Fosc1

TA = +25°C

215

250

285

kHz

Short Circuit Oscillation Frequency

Fosc2

VFB = 0V

kHz

Maximum Duty Cycle

DMAX

VFB = 0.7V

Minimum On Time

180

EN Shutdown Threshold Voltage

VEN Rising

1.0

1.3

1.6

EN Threshold Voltage Hysteresis

205

Input Under Voltage Lockout

Threshold

UVLO

VIN rising, TA = +25°C

3.3

3.65

4.0

Input Under Voltage Lockout

Threshold Hysterisis

Soft-Start Current

VSS = 0V

μA

Thermal Shutdown

160

°C

Notes:

5) 100% production test at +25°C. Specifications over the temperature range are guaranteed by design and characterization.

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