● 2.7V to 5.5V Input Voltage

● 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 

● High-side Current Monitor Ratio:10:1 and 2:1

● Thermal-Shutdown Protection

● Programmable APD Over-Current Limit and Protection

● -40℃ to +85℃ Operating Temperature Range

● Available in Green TQFN-3×3-16L Package

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 Green TQFN-3×3-16L package. It operates over an ambient temperature range of -40℃ to +85℃.