MIC24066T-E/QNA

Voltage Regulators - DC DC Switching Regulators Overview

The MIC24066T-E/QNA is a synchronous step-down DC-DC converter manufactured by Microchip Technology. It integrates high-side and low-side MOSFETs to deliver up to 6A of output current. The device operates with an input voltage range from 4.5V to 36V and supports adjustable switching frequencies between 270kHz and 800kHz. It utilizes Adaptive Constant On-Time (ACOT) control architecture for stable operation without requiring external compensation components. The output voltage is programmable down to 0.6V, with a feedback reference accuracy of ±1%. The component is housed in a 36-pin, 5mm x 6mm VQFN package designed for thermal efficiency.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Adaptive Constant On-Time (ACOT) control architecture provides fast transient response and simplified loop compensation design.
• Integrated ripple injection structure eliminates the need for external feedforward capacitors typically required in constant on-time regulators.
• Supports pre-biased output startup and external auxiliary power supply to enhance system efficiency.
• Includes programmable soft-start timing and configurable current limit with hiccup-mode short-circuit protection.

Voltage Regulators - DC DC Switching Regulators Applications

• Wide input voltage systems requiring efficient buck conversion
• Battery-powered applications utilizing 6S lithium-ion configurations
• Industrial equipment with strict EMI filtering requirements due to fixed-frequency steady-state operation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix QNA against official Microchip documentation to confirm pinout and thermal pad configuration. Ensure the ordering part number matches the exact temperature grade and package variant required for your PCB layout. Cross-reference the datasheet revision date to validate feature availability, as control architectures may evolve across manufacturing batches.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing systems with input voltages up to 36V that require high efficiency and minimal external passive components. The ACOT control is suitable for applications demanding rapid load transient recovery without complex error amplifier compensation. Consider the thermal performance of the VQFN package; adequate copper area or heatsinking is necessary for sustained 6A loads to prevent thermal shutdown.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the Microchip PMIC family of synchronous buck converters. It is distinct from voltage-mode or peak-current-mode controllers by its proprietary ACOT architecture. The MIC24066 series targets applications where board space is limited and design complexity must be reduced, offering an integrated solution compared to discrete controller and MOSFET combinations.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Verify compatibility with existing designs before considering alternative manufacturers, as control loop dynamics and pinouts differ significantly across families.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the MIC24066 require an external compensation capacitor?

No, the Adaptive Constant On-Time (ACOT) control architecture eliminates the need for external compensation components such as COMP pins or feedforward capacitors.

What is the maximum input voltage supported by this regulator?

The MIC24066 supports a maximum input voltage of 36V, providing sufficient headroom for standard 6S battery configurations.