MP8756 – 26V, 6A, SYNCHRONOUS, STEP-DOWN CONVERTER

MP8756 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

30

mΩ

Low-side switch on resistance

15

mΩ

Switch leakage

0

1

μA

Current Limit

Low-side valley current limit

9

10.5

12

A

Switching Frequency and Timer

Switching frequency

700

kHz

Constant on timer

VIN = 10V, VOUT = 5V,

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 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