MCP1754T-3302E/OTVAO

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The MCP1754T-3302E/OTVAO is a fixed-output Low Dropout (LDO) voltage regulator delivering up to 150 mA. It operates within an input voltage range of 3.6V to 16.0V and provides a nominal output of 3.3V with a typical quiescent current of 56.0 µA. The device features a typical dropout voltage of 300 mV at full load, high power supply ripple rejection exceeding 70 dB at 1 kHz, and an output voltage tolerance of ±2.0% over the operating temperature range. It includes integrated protection mechanisms such as true current foldback, short-circuit protection, and overtemperature shutdown.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Includes a dedicated shutdown input for low-power control and a power good open-drain output for system monitoring.
• Features true current foldback protection that gracefully reduces output current during overload conditions.
• Maintains stable operation with minimum 1.0 µF ceramic, tantalum, or aluminum electrolytic output capacitors.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Battery-powered alarm circuits
• Smoke detectors
• CO2 detectors
• Smart battery packs

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the component against official Microchip datasheet DS20002276C to confirm the specific package type and electrical characteristics match the design requirements. Ensure the ordering suffix corresponds to the intended reel packaging configuration. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and traceability before procurement.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this regulator for applications requiring a wide input voltage range up to 16V and high efficiency under light loads due to its low quiescent current. The inclusion of shutdown and power good pins makes it suitable for systems requiring precise power sequencing and fault monitoring. Verify thermal dissipation capabilities based on the ambient temperature and PCB layout constraints.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This component belongs to the MCP1754/MCP1754S family of high-performance CMOS LDO regulators manufactured by Microchip Technology. The 'MCP1754' designation indicates the presence of additional control pins for shutdown and power good functions compared to the basic MCP1754S variant. The '/OT' suffix specifies the SOT-223-5 surface-mount package.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct pin-compatible replacements within the same family include the MCP1754S series, though these lack the shutdown and power good pins. Other Microchip LDOs may require schematic modifications if pinouts or control features differ significantly.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

What is the function of the PWRGD pin?

The PWRGD pin is an open-drain output that indicates when the LDO output voltage is within 92% of its nominal regulation value, providing a status signal for system monitoring.

How does the current foldback protection work?

When the load impedance decreases excessively, the output current and voltage gracefully fold back towards 30 mA and 0V respectively, protecting the device from damage during short-circuit conditions.