Small Boost Converter with Current Monitor Is Ideal for APD-Biasing in Fiber Modules

Note to Editor: The MAX15031 is a small step-up converter that can operate from 2.7V to 11V and provide an output voltage up to 76V. This device saves space and cost by integrating a high-side current monitor with high-speed current limit and a boost converter into a single IC. Maxim's superior BiCMOS process technology enables this advanced integration. The MAX15031 is ideal for fiber modules and avalanche photodiode (APD) biasing applications. MAX15031中文資料 Small Boost Converter Integrates a High-Side Current Monitor to Save Space

SUNNYVALE, CA—April 1, 2009—Maxim Integrated Products (NASDAQ: MXIM) introduces the MAX15031, a constant-frequency, pulse-width modulated (PWM) step-up converter that is designed for low-voltage systems that require a locally generated high voltage. Operating from a 2.7V to 11V supply, this device delivers a low-noise output voltage up to 76V (300mW of power) without an external voltage doubler. Additionally, Maxim's advanced BiCMOS process technology enables the MAX15031 to integrate a high-side current monitor with fast (1µs) current limiting to save space and cost in diode-biasing applications. This device is ideal for applications such as avalanche photodiode (APD) biasing, PIN biasing, and varacter biasing in fiber modules.

The MAX15031 utilizes peak current-mode PWM architecture with a fixed switching frequency of 400kHz, thus producing a low-noise output. The onboard current monitor offers three decades of dynamic range, and monitors current from 500nA to 4mA with high accuracy. Resistor-adjustable current limiting protects the APD from optical power transients. Internal soft-start circuitry limits the input inrush current during power-up, while a clamp diode protects the monitor's output from overvoltage conditions.

The MAX15031 is available in a space-saving, 4mm x 4mm, 16-pin TQFN package, and is fully specified over the -40°C to +125°C temperature range. Prices start at $1.65 (1000-up, FOB USA).

Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells high-performance semiconductor products. The Company reported revenue in excess of $2 billion for fiscal 2008. Maxim was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers' products. To date, it has developed over 5900 products serving the industrial, communications, consumer, and computing markets.