Microchip Fixed LDO Voltage Regulator, 3.3V, 250mA, SOT-223-3

The Microchip MCP1703-3302E/DB is a fixed output CMOS low dropout (LDO) voltage regulator, supplied in a compact 3-pin SOT-223 surface-mount package. This regulator is engineered to deliver a stable and reliable 3.3V output with a maximum current of 250mA, making it a versatile power management solution for a wide range of applications.

The input operating range is specified from 2.7V to 16V, making it an ideal choice for battery-powered devices, including two to six primary cell configurations, 9V alkaline batteries, and one or two cell Li-Ion powered applications. With an output voltage tolerance of typically ±0.4% at 25°C and a maximum of ±3% across the full -40°C to +125°C temperature range, this regulator ensures consistent performance in demanding conditions.

Key features include a low dropout voltage of typically 625mV at 250mA, a very low quiescent current of just 2µA, and stability with a wide range of output capacitors from 1µF to 22µF, including ceramic, tantalum, or aluminium electrolytic types. Built-in protections include overcurrent limit, overtemperature shutdown, and short circuit protection, providing a robust solution for any application.

Applications:

• Power Management
• Portable Devices
• Consumer Electronics

Specifications:

• Output Type: Fixed 3.3V
• Input Voltage Range: 2.7V to 16V
• Maximum Output Current: 250mA
• Dropout Voltage: typically 625mV at 250mA
• Quiescent Current: 2µA typical
• Output Capacitance: Stable with 1µF to 22µF ceramic
• Output Tolerance: ±0.4% typical at 25°C, ±3% maximum over -40°C to +125°C
• Line Regulation: ±0.1% typical at 25°C
• Operating Temperature Range: -40°C to +125°C
• Package: 3-pin SOT-223, Surface Mount
• Packaging: Tube