MP8770

17V, 8A, 700kHz, High-Efficiency,

Synchronous, Step-Down

MP8770 Rev. 1.0

www.MonolithicPower.com

1

1/4/2018

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© 2018 MPS. All Rights Reserved.

DESCRIPTION

The MP8770 is a fully integrated, high-frequency,

synchronous, rectified, step-down, switch-mode

converter with internal power MOSFETs. The

MP8770 offers a very compact solution that

achieves 8A of continuous output current with

excellent load and line regulation over a wide

input range. The MP8770 uses synchronous-

mode operation for higher efficiency over the

output current-load range.

Constant-on-time

(COT)

control

operation

provides very fast transient response, easy loop

design, and very tight output regulation.

Full protection features include short-circuit

protection (SCP), over-current protection (OCP),

under-voltage protection (UVP), and thermal

shutdown.

The MP8770 requires a minimal number of

readily available, standard, external components

and is available in a space-saving QFN-16

(3mmx3mm) package.

FEATURES

 Wide 4.5V to 17V Operating Input Range

 8A Output Current

 22mΩ/10mΩ Low R

MOSFETs

 100μA Quiescent Current

 Output Adjustable from 0.6V

 High-Efficiency Synchronous Mode

Operation

 Pre-Biased Start-Up

 Fixed 700kHz Switching Frequency

 External Programmable Soft Start-Up Time

 EN and Power Good for Power Sequencing

 Over-Current Protection (OCP) and Hiccup

 Thermal Shutdown

 Available in a QFN-16 (3mmx3mm)

Package

APPLICATIONS

 Security Cameras

 Portable Devices, XDSL Devices

 Digital Set-Top Boxes

 Flat-Panel Television and Monitors

 General Purposes

All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive.

For MPS green status, please visit MPS website under Quality Assurance.

“MPS” and “The Future of Analog IC Technology” are registered trademarks

of Monolithic Power Systems, Inc.

TYPICAL APPLICATION

VIN

VCC

PG

ENABLE

FB

SS

EN

C5

22nF

PG

VIN

C1

22µFx2

SW

BST

C3

0.1µF

VOUT

C2

22µFx4

R1

20kΩ

R2

30kΩ

1V/8A

C4

1µF

L1

0.56µH

MP8770

4.5V-17V

R4

1kΩ

Efficiency vs. Load Current

60

65

70

75

80

85

90

95

100

0.0

2.0

4.0

6.0

8.0

LOAD CURRENT(A)

VIN=5V

VIN=12V