Microchip MIC2125 | Demoboard DS20005469A

Description

The MIC2125 and MIC2126 are constant-frequency synchronous buck controllersfeaturing a unique adaptive ON-time control architecture. The MIC2125/6 operate overan input voltage range from 4.5V to 28V and can be used to supply load current up to 25A. The output voltage is adjustable down to 0.6V with an accuracy of ±1%. The device operates with programmable switching frequency from 200 kHz to 750 kHz.HyperLight Load® architecture operates in pulse-skipping mode at light loads, but operates in fixed-frequency CCM mode from medium loads to heavy loads. Hyper Speed Control® architecture operates in fixed-frequency CCM mode under all load conditions.The MIC2125/6 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, internal soft-start to reduce inrush current, "hiccup" mode short-circuit protection, and thermal shutdown.

Features

• Hyper Speed Control® architecture enables:
• High delta-V operation (VIN = 28V and VOUT = 0.6V)
• Any Capacitor™ stable
• 4.5V to 28V input voltage
• Adjustable output voltage from 0.6V to 24V
• 200kHz to 650kHz programmable switching frequency
• HyperLight Load® (MIC2125)
• Hyper Speed Control® (MIC2126)
• Enable input and power good output
• Built-in 5V regulator for single-supply operation
• Programmable current limit and "hiccup" mode short-circuit protection
• 7ms internal soft-start, 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

More information

• Datasheet
• IC product information