MP8759 – 26V, 8A, SYNCHRONOUS, STEP-DOWN CONVERTER

MP8759 Rev. 1.1

www.MonolithicPower.com

4

4/13/2017

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ELECTRICAL CHARACTERISTICS

Parameters

Symbol

Condition

Min

Typ

Max

Units

Supply Current

Supply current (shutdown)

1

2

μA

Supply current (quiescent)

117

135

µA

MOSFET

High-side switch-on resistance

25

mΩ

Low-side switch-on resistance

12

mΩ

Switch leakage

0

1

μA

Current Limit

Low-side valley current limit

10.5

12

13.5

A

Switching Frequency and Timer

Switching frequency

700

kHz

Constant on timer

forced PWM mode

710

ns

Minimum on time

(5)

50

ns

Minimum off time

(5)

250

ns

Ultrasonic Mode (USM)

Ultrasonic mode operation period

20

30

40

µs

Over-Voltage (OVP) and Under-Voltage Protection (UVP)

OVP rising threshold

117%

122%

127%

OVP falling threshold

112%

117%

122%

UVP-1 threshold

70%

75%

80%

UVP-1 deglitch timer

(5)

50

µs

UVP-2 threshold

45%

50%

55%

Reference and Soft Start (SS)

Feedback voltage

594

600

606

mV

Soft-start time

VOUT 10% to 90%

1.2

ms

MODE

PWM mode input logic low

threshold

2.6

V

PFM with USM threshold

1.2

1.9

V

PFM without USM threshold

0.4

V