MP3430

90V Step-Up Converter

with APD Current Monitor

MP3430 Rev 1.11

www.MonolithicPower.com

1

4/25/2013

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© 2013 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP3430 is a monolithic step-up converter

that integrates a power switch and a biased

avalanche photodiode (APD) current monitor.

The device can double the output voltage

through the APD optical receivers. The MP3430

can provide up to 90V output.

The MP3430 uses a current-mode, fixed-

frequency architecture to regulate the output

voltage, which provides a fast transient

response and cycle-by-cycle current limiting.

The MP3430 features two accurate APD

current monitoring outputs with 1:10 and 1:2

ratios, respectively. Resistor-adjustable current

limiting protects the APD from optical power

transients.

The MP3430 includes over-current and thermal-

overload protection to prevent damage in the

event of an output overload.

The MP3430 is available in a small 3mm×3mm

QFN16 package.

FEATURES

 2.7V-to-5.5V Input Voltage

 100V/1Ω NFET with 0.9A Limit

 Up to 90V Output Voltage

 50ns APD Current Monitoring Response

Speed

 1.3MHz Fixed Switching Frequency

 Internal Compensation and Soft-Start

 High-Side APD Current Monitor with less

than ±5% Tolerance.

 1:10 and 1:2 Ratio Outputs for APD Current

Monitoring

 Thermal-Shutdown Protection

 Programmable APD Over-Current Limit and

Protection

 3×3mm QFN16 Package

APPLICATIONS

 APD Biasing

 PIN Diode Biasing

 Optical Receivers and Modules

 Fiber-Optic–Network Equipment

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

status, please visit MPS website under Products, Quality Assurance page.

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION