MIC2128YML-TR [Microchip]

The MIC2128 is a constant-frequency synchronous buck controllers featuring a unique adaptive ON-time control architecture. The MIC2128 operates over an input voltage range from 4.5V to 75V and can be used to supply load current up to 25A (Thermally Limited) . The output voltage is adjustable down to 0.6V with a guaranteed accuracy of ±1%. The device operates with programmable switching frequency from 270kHz to 800kHz.

The MIC2128 offers a full suite of protection features to ensure protection of the IC during fault conditions. These include undervoltage lockout to ensure proper operation under power-sag conditions, Adjustable soft-start to reduce inrush current, "hiccup" mode short-circuit protection, and thermal shutdown.

• Hyper Speed Control® architecture enables:
• 4.5V to 75V input voltage
• Adjustable output voltage from 0.6V to 30V
• 270kHz to 800kHz programmable switching frequency
• Externally programmable soft start
• Enable input and power good output
• Built-in 5V regulator for single-supply operation
• Auxiliary bootstrap LDO
• Internal Bootstrap diode
• Programmable current limit and "hiccup" mode short-circuit protection
• Internal compensation, and thermal shutdown
• Supports safe start-up into a pre-biased output
• -40°C to +125°C junction temperature range
• Available in 16-pin 3mm x 3mm QFN package