MP8758–18V, HIGH CURRENT SYNCHRONOUS BUCK CONVERTER

MP8758 Rev. 1.0

www.MonolithicPower.com

4

1/13/2015

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ELECTRICAL CHARACTERISTICS

Parameters

Symbol

Condition

Min

Typ

Max

Units

Supply Current

Supply Current (Shutdown)

0

1

μA

Supply Current (Quiescent)

160

190

220

μA

MOSFET

High-side Switch On Resistance

25

mΩ

Low-side Switch On Resistance

9

mΩ

Switch Leakage

0

1

μA

Current Limit

Low-side Valley Current Limit

10

11

12

A

Switching frequency and minimum off time

Switching frequency

400

500

600

kHz

Minimum Off Time

(6)

250

300

350

ns

Over-voltage and Under-voltage Protection

OVP Threshold

125

130

135

OVP Delay

2.5

μs

UVP Threshold

55

60

65

UVP Delay

12

μs

Reference And Soft Start

Reference Voltage

598

604

610

mV

Feedback Current

10

50

nA

Soft Start Time

1.6

1.95

ms

Enable And UVLO

Enable Input Low Voltage

1.15

1.25

1.35

V

Enable Hysteresis

100

mV

Enable Input Current

3

μA

0

VCC Under Voltage Lockout

Threshold Rising

4.5

4.85

V

VCC Under Voltage Lockout

Threshold Hysteresis

500

mV