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SGM41283

70V Step-Up Converter with APD Current Monitor
 
70V Step-Up Converter with APD Current Monitor
GENERAL DESCRIPTION

The SGM41283 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 SGM41283 can provide up to 70V output.

The SGM41283 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 SGM41283 features two accurate APD current monitoring outputs with 10:1 and 2:1 ratios, respectively. Resistor-adjustable current limiting protects the APD from optical power transients.

The SGM41283 includes over-current and thermal- overload protection to prevent damage in the event of an output overload.

The SGM41283 is available in a Green TQFN-3×3-16L package. It operates over an ambient temperature range of -40 to +125.

PIN CONFIGURATIONS

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FEATURES
  • Input Voltage Range: 2.7V to 5.5V

  • 72V/0.6Ω NFET with 1.1A Limit

  • Up to 70V Output Voltage

  • 50ns APD Current Monitoring Response Speed

  • 850kHz Fixed Switching Frequency

  • Internal Compensation and Soft-Start

  • High-side APD Current Monitor with Less than ±5% Tolerance

  • High-side Current Monitor Ratios:10:1 and 2:1

  • Thermal-Shutdown Protection

  • Programmable APD Over-Current Limit and Protection

  • -40 to +125 Operating Temperature Range

  • Available in a Green TQFN-3×3-16L Package

APPLICATIONS

APD Biasing

PIN Diode Biasing

Optical Receivers and Modules

Fiber-Optic-Network Equipment

ORDERING INFORMATION
Part NumberStatusPackagePinsPb-FreeTemp Range
SGM41283XTQ16G/TRProductionTDFN-3×3-16L16Y-40℃ to +125℃

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