New from Intersil is the ISL8107, a single-phase, non-synchronous buck controller that provides efficiency and flexibility for telecommunications and industrial designs.
The device features a wide operating input voltage range of 9 V to 75 V, with an internal 1,192 V reference voltage tolerance of ±1% over industrial temperature ranges. It integrates a high-side N-channel MOSFET driver, which can be used to drive a MOSFET that is connected to the positive supply and is not ground-referenced.
Using voltage-mode control with feed-forward compensation, the ISL8107 provides transient response and a constant loop gain over the input voltage range. Its switching frequency can be programmed from 100 kHz to 600 kHz using an external resistor and capacitor. Switching frequencies can be synchronised to an external clock signal through the SYNC pin.
The ISL8107 also provides programmable soft-start, hiccup mode for short circuit protection, and over-temperature protection. Over-current protection is achieved using the MOSFET’s RDS(on) sensing, which simplifies the implementation while maintaining converter efficiency.
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