MICROCHIP MCP1700T-3302E/MB Low Quiescent Current LDO Voltage Regulator, 3.3V,

The MICROCHIP MCP1700T-3302E/MB is a high-performance, low quiescent current CMOS low dropout (LDO) voltage regulator, presented in a compact 3-pin SOT-89 surface-mount package. Engineered for exceptional efficiency, it is an ideal power management solution for battery-powered and portable electronic applications where extended operational life is critical.

This regulator delivers a fixed 3.3V output with high precision, featuring a typical output voltage tolerance of ±0.4% at 25°C and a maximum of ±3% across the full operating temperature range. Its remarkably low quiescent current, typically just 1.6µA, minimises battery drain, making it perfect for two and three primary cell battery packs or single-cell Li-Ion powered devices.

Key Performance Features

The MCP1700T-3302E/MB offers a wide input operating voltage range from 2.3V to 6.0V. It can supply a maximum output current of 250mA with a very low dropout voltage of only 178mV at full load, ensuring stable operation even as battery voltage decays. For reliability, the integrated circuit includes both short-circuit protection and over-temperature protection.

Design Flexibility

Stable operation is guaranteed with just a 1µF output capacitor, offering design engineers flexibility to use ceramic, tantalum, or aluminium electrolytic capacitors for both input and output. Its high power supply ripple rejection (PSRR) of 44dB helps to clean noisy input supplies, contributing to a cleaner, more stable output voltage. The package permits high currents in a small footprint, especially when operated with minimal input-to-output voltage differentials.

Specifications at a Glance

• Fixed Output Voltage: 3.3V
• Maximum Output Current: 250mA
• Input Voltage Range: 2.3V to 6.0V
• Dropout Voltage: 178mV (at 250mA load)
• Quiescent Current: 1.6µA (typical)
• Operating Temperature Range: -40°C to +125°C<br