SGM41285 is a boost DC-DC converter with a wide input voltage range of 2.8V to 5.5V. This device can deliver a maximum of 70V output voltage and 4mA monitoring current limit. The 850kHz fixed switching frequency and PWM mode allow this device to minimize noise of output voltage. The constant PWM frequency provides easy filtering of output voltage in low noise applications.
This device integrates the fast biased avalanche photodiode (APD) current monitor limit with 1μs response time. The current limiting function with adjustable resistors protects the APD from the effects of optical power transients. The SGM41283 integrates various protection features such as soft-start, cycle-by-cycle current limit, under-voltage lockout (UVLO) and thermal shutdown.
The SGM41285 is available in a Green TQFN-3×3-16L package. It operates over an ambient temperature range of -40℃ to +125℃.
2.8V to 5.5V Input Voltage Range
(VIN + 5V) to 70V Wide Output Voltage Range
850kHz Fixed Switching Frequency
Internal 0.6Ω (TYP) 72V MOSFET
Less than 1μA Shutdown Current
Boost Converter Output Power:
SGM41285A: 300mW
SGM41285B: 200mW
High-side Current Monitor Ratios:
SGM41285A: 1:1
SGM41285B: 5:1
Accurate High-side APD Current Monitor with 1:1 and 5:1 Ratios
Resistor-Adjustable Ultra-Fast APD Current Limit (1μs Response Time)
Open-Drain Current-Limit Indicator Flag
Constant PWM Frequency Provides Easy Filtering in Low Noise Applications
Internal Soft-Start Function
-40℃ to +125℃ Operating Temperature Range
Available in a Green TQFN-3×3-16L Package
Avalanche Photodiode Bias and Monitor
Supply for PIN Diode Bias
Supply for Low-Noise Varactor Diode Bias
FBON and GPON Modules
