MPQ4456 –INDUSTRIAL GRADE, 1A, 4MHz, 36V STEP-DOWN CONVERTER

MPQ4456 Rev. 1.0

www.MonolithicPower.com

3

2/8/2013

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ELECTRICAL CHARACTERISTICS

Parameter

Symbol Condition

Min

Typ

Max

Units

Feedback Voltage

0.778

0.796

0.814

V

4.5V < VIN < 36V

0.772

0.820

Feedback Bias Current

0.01

1

µA

Upper Switch On Resistance

(5)

300

m

Upper Switch Leakage

1

µA

Current Limit

Duty Cycle = 50%

1.2

1.8

2.4

A

COMP to Current Sense

Transconductance

(5)

3.1

A/V

Error Amp Voltage Gain

(6)

200

V/V

Error Amp Transconductance

25

60

95

A/V

Error Amp Min Source current

5

A

Error Amp Min Sink current

–5

A

VIN UVLO Threshold

2.6

3.0

3.4

V

VIN UVLO Hysteresis

400

mV

Soft-Start Time

(5)

1.5

ms

Oscillator Frequency

Ω

1.6

2

2.4

MHz

Shutdown Supply Current

12

18

A

Quiescent Supply Current

120

160

A

Thermal Shutdown

(5)

150

°C

Thermal Shutdown Hysteresis

(5)

15

°C

Minimum Off Time

(5)

100

ns

Minimum On Time

(5)

80

ns

EN Up Threshold

1.2

1.5

1.8

V

EN Threshold Hysteresis

150

300

450

mV

Note:

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

6) Guaranteed by design. Not tested in production.