MP4561 – 1.5A, 2MHz, 55V STEP-DOWN CONVERTER

MP4561 Rev. 1.0

www.MonolithicPower.com

3

11/5/2012

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ELECTRICAL CHARACTERISTICS

Parameter

Symbol Condition

Min

Typ

Max

Units

0.780

0.800

0.820

Feedback Voltage

–40°C to +85

°C

0.771

0.829

V

220

300

395

Upper Switch On Resistance

(5)

–40°C to +85

°C

200

475

mΩ

Upper Switch Leakage

1

μA

1.9

2.5

3.1

Current Limit

–40°C to +85

°C

1.7

3.3

A

COMP to Current Sense

Transconductance

4.5

A/V

Error Amp Voltage Gain

400

V/V

Error Amp Transconductance

120

µA/V

Error Amp Min Source current

10

µA

Error Amp Min Sink current

-10

µA

2.7

3.0

3.3

V

VIN UVLO Threshold

–40°C to +85

°C

2.4

3.6

VIN UVLO Hysteresis

0.35

V

Soft-Start Time

(5)

1.6

ms

0.8

1

1.2

MHz

Oscillator Frequency

–40°C to +85

°C

0.7

1.3

Minimum Switch On Time

(5)

100

ns

Shutdown Supply Current

12

20

µA

Quiescent Supply Current

140

µA

Thermal Shutdown

Hysteresis = 20

°C

150

°C

Minimum Off Time

100

ns

Minimum On Time

–40°C to +85

°C

100

130

ns

1.4

1.55

1.7

V

EN Up Threshold

–40°C to +85

°C

1.3

1.8

EN Threshold Hysteresis

320

mV

5) Derived from bench characterization. Not tested in production.