Microchip LDO Voltage Regulator 3.3V 250mA SOT-89-3

The Microchip LDO Voltage Regulator 3.3V 250mA SOT-89-3 is a CMOS low dropout positive voltage regulator that delivers a fixed 3.3V output at up to 250mA from a compact SOT-89-3 footprint.

Overview

The regulator is designed to power a wide range of microcontroller, sensor, and peripheral circuits. Its input voltage range of 2.7V to 13.2V and very low quiescent current of 2µA (typical) make it well suited to battery-operated devices, including equipment powered by multi-cell alkaline (9V) batteries or one- to two-cell lithium-ion batteries, where maximising operational life is important.

Key Features

• Fixed 3.3V output
• Maximum output current of 250mA
• Input voltage range of 2.7V to 13.2V
• Quiescent current of 2µA (typical)
• Output voltage tolerance of ±0.4% at +25°C (typical)
• Maximum output voltage tolerance of ±3% across -40°C to +125°C
• Line regulation of ±0.1% (typical)
• Dropout voltage of 525mV
• Short-circuit protection
• Over-temperature shutdown
• Stable with a 1µF ceramic, tantalum, or aluminium electrolytic output capacitor

Reliability and Stability

The regulator includes short-circuit protection and over-temperature shutdown to safeguard both the regulator and the application against fault conditions. Its low dropout voltage allows regulation to continue when the input voltage falls close to the output level, helping to preserve battery energy. The minimal output capacitor requirement simplifies design and saves board space.

Applications

Suitable for a range of electronic applications, including portable and handheld devices, security system components, sensing and instrumentation modules, and consumer electronics.

Dimensions and Weight

• Width: 3.3
• Depth: 1.5
• Height: 4.3
• Weight: 0.118 gm

Choose this Microchip LDO Voltage Regulator 3.3V 250mA SOT-89-3 for a compact, fixed-output power supply solution in battery-powered and portable electronic designs.