MIC26950 Buck Regulator

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            MIC26950 Buck Regulator
                    Microchip’s Hyper Speed Control™ architecture allows for ultra-fast transient response while reducing the output capacitance
    

Image of Micrel's MIC26950 Buck Regulator Microchip's MIC26950 is a constant frequency, synchronous buck regulator featuring a unique digitally modified adaptive ON-time control architecture. The MIC26950 operates over an input supply range of 4.5 V to 26 V and provides a regulated output at up to 12 A of output current. The output voltage is adjustable down to 0.8 V with a typical accuracy of ±1%, and the device operates at a switching frequency of 300 kHz.

Micr’s Hyper Speed Control™ architecture allows for ultra-fast transient response while reducing the output capacitance. It also makes (High VIN)/(Low VOUT) operation possible. This digitally modified adaptive tON ripple control architecture combines the advantages of fixed frequency operation and fast transient response in a single device.

The MIC26950 offers a full suite of protection features to ensure protection of the IC during fault conditions. These features include undervoltage lockout to ensure proper operation under power-sag conditions, internal soft-start to reduce inrush current, fold-back current limit, "hiccup" mode short-circuit protection, and thermal shutdown.

Features
Foldback current limit and "hiccup" mode short-circuit protection –40°C to 125°C junction temperature range Hyper Speed Control™ architecture enables: High delta V operation (VIN = 26 V and VOUT = 0.8 V) Small output capacitance Supports safe start-up into a pre-biased load Any Capacitor™ Stable Zero ESR to high-ESR output capacitance		Output down to 0.8 V with ± 1% accuracy 300 kHz switching frequency 12 A output current capability 28-pin 5 mm x 6 mm MLF^® package Internal compensation Up to 95% efficiency 6 ms internal soft-start 4.5 V to 26 V input voltage

Applications

Printers, scanners, graphic cards, and video cards
Distributed power systems
Communications/networking infrastructure
Set-top boxes, gateways, and routers