Milpitas, Calif. Intersil Corp. has introduced the ISL8107, a single-phase, non-synchronous buck controller that provides maximum efficiency and flexibility for telecommunications and industrial designs. It is also suitable for routers and switchers, point-of-load modules, and distributed dc/dc power architecture applications.
The ISL8107 features an ultra-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 claims optimal transient response and a constant loop gain over the input voltage range. The IC's switching frequency can be programmed from 100 kHz to 600 kHz using an external resistor and capacitor. Switching frequencies can be synchronized 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, Intersil said.
Intersil Corp. , www.intersil.com