MIC29710-3.3BT

Overview

The MIC29710-3.3BT is a high-current, high-accuracy, low-dropout (LDO) voltage regulator manufactured by Microchip Technology. It provides a fixed positive output of 3.3V with a maximum load current capability of 7.5A. The device features a typical dropout voltage of 700mV at full load and ensures precise regulation with a guaranteed tolerance of ±2%. It incorporates a TTL-compatible enable pin for external on/off control and utilizes Micrel’s proprietary Super Eta PNP process technology.

Feature Summary

• High current delivery capability up to 7.5A
• Fast transient response to input voltage and load changes
• Integrated protection against overcurrent, thermal overload, and reverse polarity
• TTL-compatible enable pin for system power management

Applications

• Power supply for Intel Pentium and Pentium Plus processors
• Efficient linear power supplies in 'green' computer systems
• Post-regulation stages for high-efficiency switching power supplies
• Battery-powered equipment requiring stable voltage rails

Procurement Notes

Verify the package type matches the application requirements, as the BT suffix indicates a specific surface-mount configuration. Confirm that the 7.5A current rating aligns with the thermal design capabilities of the target PCB layout. Ensure the input voltage remains within the specified operational limits to maintain the low dropout performance characteristics defined in the official datasheet.

Selection Notes

Select this component when a high-current, fixed 3.3V rail is required for processor or logic loads. The fast transient response makes it suitable for dynamic load applications. Consider the thermal dissipation requirements associated with 7.5A operation. If adjustable output is needed instead, the MIC29712 variant should be evaluated. Verify compatibility with the system's enable logic levels due to the TTL-compatible interface.

Part Context

This part belongs to the MIC29710/29712 family of Super Eta LDO regulators. These devices are designed for demanding applications requiring high efficiency and robust protection. The family includes both fixed-output (MIC29710) and adjustable-output (MIC29712) versions, all sharing the same core architecture and protection features for consistent performance across different voltage configurations.

Replacement Considerations

The MIC29710-5.0BT is a direct functional substitute if a 5.0V output is acceptable. For adjustable output requirements, the MIC29712 series offers equivalent current and protection specifications. Ensure any replacement maintains the 7.5A current rating and compatible package footprint for mechanical interchangeability.