MP3425- 3A, 55V BOOST CONVERTER WITH PROGRAMMABLE SWITCHING FREQUENCY AND UVLO

MP3425 Rev.1.02

www.MonolithicPower.com

3

6/28/2013

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ELECTRICAL CHARACTERISTICS

Parameter

Symbol Condition

Min

Typ

Max

Units

Operating Input Voltage

3.1

22

V

Undervoltage Lockout

2.8

3.1

V

Undervoltage Lockout

Hysteresis

250

mV

VDD Voltage

Gate drive Voltage supply

C = 10nF

6

V

Supply Current (Shutdown)

1

μA

Supply Current (Quiescent)

650

900

μA

Switching Frequency

FSET = 84.5kΩ

0.44

0.55

0.66

MHz

Minimum Off time

100

ns

Minimum On time

100

ns

EN High Threshold

1.45

1.5

1.55

V

EN High Threshold

1.0

V

EN Low Threshold

0.5

V

EN Input Bias Current

0.1

1

μA

UVLO Hysteresis current

into EN pin

1.0 < EN < 1.4

4

μA

Soft-Start Current

5

μA

FB Voltage

1.200

1.225

1.250

V

FB Input Bias Current

-200

-100

nA

Error Amp Voltage Gain

300

V/V

Error Amp

Transconductance (

A

V

μ

)

160

μmho

Error Amp Output Current

20

μA

GCS : I(SW) / Vcomp

9

A/V

SW On-Resistance

90

mΩ

SW Current Limit

Duty Cycle = 0%

3.5

5

A

Thermal Shutdown

160

°C