MP3429

Fully Integrated, Synchronous,

Boost Converter

MP3429 Rev. 1.0

www.MonolithicPower.com

1

6/8/2017

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2017 MPS. All Rights Reserved.

DESCRIPTION

The MP3429 is a 600kHz, fixed-frequency, wide

input range, highly integrated, boost converter.

The MP3429 starts from an input voltage as low

as 2.7V and supports up to 30W of load power

power MOSFETs.

The MP3429 adopts constant-off-time (COT)

control topology, which provides fast transient

response. MODE supports the selection of

pulse-skip mode (PSM), forced continuous

conduction mode (FCCM), and ultrasonic mode

(USM) in light-load condition. The cycle-by-cycle

current limit on the low-side MOSFET prevents

current runaway, and the high-side MOSFET

eliminates the need for an external Schottky

diode.

Full protection features include programmable

input under-voltage lockout (UVLO) and over-

temperature protection (OTP).

The

MP3429

is

available

in

a

QFN-13

(3mmx4mm) package.

FEATURES

 2.7V to 13V Start-Up Voltage

 0.8V to 13V Operating Voltage

 Up to 16V Output Voltage

 Supports 30W Average Power Load and

40W Peak Power Load from 3.3V

 21.5A Internal Switch Current Limit

 Integrated 6.5mΩ and 10mΩ Power

MOSFETs

 >95% Efficiency for 3.6V VIN to 9V/3A

 Selectable PSM, >23kHz USM, and FCCM

in Light-Load Condition

 600kHz Fixed Switching Frequency

 Adaptive COT for Fast Transient Response

 External Soft Start and Compensation Pins

 Programmable UVLO and Hysteresis

 150°C Over-Temperature Protection (OTP)

 Available in a QFN-13 (3mmx4mm)

Package

APPLICATIONS

 Notebooks

 Bluetooth Speakers

 Portable POS Systems

 Quick-Charge Power Banks

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

MP3429

SW

BST

VIN

MODE

EN

VDD

SS

C1

22μFX3

AGND PGND

FB

COMP

FTY

VOUT

C2

22μFx3

R1

750kΩ

R2

93.1kΩ

C6

6.8nF

R3

6.8kΩ

C3

4.7μF

C4

22nF

C5

0.1μF

L1 1.5μH

On / off

High/ Middle/ Low

2.7V-8.4V

9V/3.5A

50

55

60

65

70

75

80

85

90

95

100

1

10

100

1000

Load Current(mA)

Efficiency vs. Load Current

PSM

Vin=3V

Vin=3.3V

Vin=3.6V

Vin=4.2V