MP3309L

2.7V-5.5V Input, 24V Output,

MP3309L Rev. 1.01

www.MonolithicPower.com

1

7/18/2017

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© 2017 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP3309L is a WLED step-up converter for

2.7V-to-5.5V input that uses peak-current mode

to regulate the LED current sensed through an

external,

low-side

resistor.

The

200mV

feedback voltage and synchronous rectification

reduces power loss and reduces PCB space

requirements.

The

MP3309L

features

a

programmable

switching frequency to optimize efficiency. It

supports both analog and PWM dimming.

In addition, the MP3309L has LED open

protection,

cycle-by-cycle

current

limit

protection, thermal shutdown protection.

FEATURES

 2.7V-to-5.5V Input Voltage

 Analog and PWM Dimming

 Programmable Switching Frequency

 24V Open-Load Protection

 Low 200mV Feedback Voltage with ±1%

Accuracy at Room Temperature

 UVLO, Thermal Shutdown

 Available in a 1.4×1.8mm FCQFN10

Package

APPLICATIONS

 Feature Phones and Smart Phones

 Tablets

 <10inch Video Displays

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

MPS green status, please visit the MPS website under Quality Assurance. “MPS”

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

C1

SW

MP3309 L

L1

C3

VIN

GND

IN

C

R3

2

PWM

BST

VOUT

GND

EN/PWML

PWMH

PWMH

FB

R1

FREQ

R2

PWMH