MIC2168AYMM [Microchip]

The MIC2168 is a high-efficiency, simple to use 1MHz PWM synchronous buck control IC housed in a small MSOP-10 package. The MIC2168 allows compact DC/DC solutions with a minimal external component count and cost.

The MIC2168 operates from a 3V to 14.5V input, without the need of any additional bias voltage. The output voltage can be precisely regulated down to 0.8V. The adaptive all N-Channel MOSFET drive scheme allows efficiencies over 95% across a wide load range.

The MIC2168 senses current across the high-side N-Channel MOSFET, eliminating the need for an expensive and lossy current-sense resistor. Current limit accuracy is maintained by a positive temperature coefficient that tracks the increasing R_DS(ON) of the external MOSFET. Further cost and space are saved by the internal in-rush-current limiting digital soft-start.

The MIC2168 is available in a 10-pin MSOP package, with a wide junction operating range of -40°C to +125°C.

• 3V to 14.5V input voltage range
• Adjustable output voltage down to 0.8V
• Up to 95% efficiency
• 1MHz PWM operation
• Adjustable current-limit senses high-side N-Channel MOSFET current
• No external current sense resistor
• Adaptive gate drive increases efficiency
• Ultra-fast response with hysteretic transient recovery mode
• Overvoltage protection protects the load in fault conditions
• Dual mode current limit speeds up recovery time
• "Hiccup" mode short-circuit protection
• Internal soft-start
• Dual function COMP and EN pin allows low-power shutdown
• Small size MSOP 10-lead package