Micrel Inc.'s has launched its family of Hyper Speed Control PWM controllers, the MIC2164, MIC2164-2 and MIC2164-3, whose architecture significantly reduces the required output capacitance and allows for excellent transient response, while making high delta V operation (VIN=28V, VOUT=0.8V) possible. The solutions are ideal for set-top boxes, gateways, routers, computing peripherals, and telecom/networking equipments.
The new devices are constant on-time mode PWM controllers that feature wide input voltage range, high performance, and are capable of driving up to 25A of load current. The MIC2164 operates at 300kHz PWM frequency while MIC2164-2 and MIC2164-3 operate at 600kHz and 1MHz respectively, to allow a size reduction path. The family achieves greater than 95 percent efficiency, while still switching at high frequencies, over a broad load range. The MIC2164 Hyper Speed Control family of PWM controllers operates over a wide input supply range of 3V to 28V and also offers cycle-by-cycle current limiting for FET protection.
While the UVLO circuitry ensures proper operation under power-sag conditions to prevent the MOSFETs from overheating, the Soft Start feature reduces the inrush current. It also features built-in compensation with an external ripple injection circuit.
The MIC2164 Hyper Speed Control family of PWM controllers is available in a 10-pin MSOP package with a junction operating range from -40°C to 125°C.
Micrel's MIC2164/-2/-3 PWM Buck Controller
Micrel
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