Analog Devices has introduced the LTC7891, a 100-volt, low quiescent current (IQ), synchronous step-down controller designed specifically to drive gallium nitride (GaN) field-effect transistors (FETs). Engineered for high efficiency and wide voltage operation, the LTC7891 is optimized for demanding industrial, military, medical, and telecommunications applications.
The LTC7891 simplifies the application design while requiring no protection diodes and no other additional external components compared to a silicon metal-oxide semiconductor field effect transistor (MOSFET) solution.
Features
- GaN drive technology fully optimized for GaN FETs
- Wide VIN range: 4 V to 100 V
- Wide output voltage range: 0.8 V ≤ VOUT ≤ 60 V
- No catch, clamp, or bootstrap diodes needed
- Internal smart bootstrap switches prevent overcharging of high-side driver supplies
- Internally optimized, smart near-zero dead times or resistor-adjustable dead times
- Split output gate drivers for adjustable turn-on and turn-off driver strengths
- Accurate adjustable driver voltage and UVLO
- Low operating IQ: 5 μA (48 VIN to 5 VOUT)
- Programmable frequency (100 kHz to 3 MHz)
- Phase lockable frequency (100 kHz to 3 MHz)
- Spread spectrum frequency modulation
- 28-lead (4 mm × 5 mm) side wettable QFN package
- AEC-Q100 qualified for automotive applications
Applications
- Automotive and industrial power systems
- Military avionics and medical systems
- Telecommunications power systems
Click here to learn more about LTC7891.
