MP3430HQ-LF-Z

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1. DESCRIPTION

The MP3430HQ-LF-Z 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 MP3430HQ-LF-Z can provide up to 90V output. The MP3430HQ-LF-Z uses a current-mode, fixedfrequency architecture to regulate the output voltage, which provides a fast transient response and cycle-by-cycle current limiting. The MP3430HQ-LF-Z 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 MP3430HQ-LF-Z includes over-current and thermaloverload protection to prevent damage in the event of an output overload. The MP3430HQ-LF-Z is available in a small 3mm×3mm QFN16 package. 

2. FEATURES

    1. 2.7V-to-5.5V Input Voltage

    2. 100V/1Ω NFET with 0.9A Limit

    3. Up to 90V Output Voltage

    4. 50ns APD Current Monitoring Response Speed

    5. 1.3MHz Fixed Switching Frequency

    6. Internal Compensation and Soft-Start

    7. High-Side APD Current Monitor with less than ±5% Tolerance.

    8. 1:10 and 1:2 Ratio Outputs for APD Current Monitoring

    9. Thermal-Shutdown Protection

  10. Programmable APD Over-Current Limit and Protection

  11. 3×3mm QFN16 Package

3. APPLICATIONS

    1. APD Biasing

    2. PIN Diode Biasing

    3. Optical Receivers and Modules

    4. Fiber-Optic–Network Equipment