TC1269-2.8VUA

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

The TC1269-2.8VUA is a fixed-output, high-accuracy CMOS low dropout regulator manufactured by Microchip Technology. It provides a regulated output voltage of 2.8 V with a maximum output current of 300 mA. The device operates within an input voltage range up to 6.0 V and maintains stability with a minimum output capacitor of 1 µF. Total supply current is typically 50 µA at full load, reducing to 0.05 µA in shutdown mode. The component features ultra-low noise operation, very low dropout voltage (typically 240 mV at full load), and fast response to step changes in load.

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

• Power saving shutdown mode reduces supply current to 0.05 µA when the SHDN pin is low
• Bypass input allows connection of a capacitor to significantly reduce output noise for ultra quiet operation
• Integrated over current and over temperature protection safeguards against thermal overload and short circuits

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

• Battery operated systems
• Portable computers
• Medical instruments
• Cellular/GSM/PHS phones
• Linear post-regulator for SMPS

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

Verify the specific part number TC1269-2.8VUA against official Microchip documentation to confirm the fixed 2.8 V output setting and MSOP-8 package configuration. Ensure that the application circuit includes the recommended 1 µF output capacitor and optional bypass capacitor to meet performance specifications. Confirm compatibility with the required operating temperature range of -40°C to +125°C before procurement.

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

Select this component for applications requiring low ground current to extend battery life and high output voltage accuracy. It serves as a direct CMOS upgrade for older bipolar low dropout regulators. Consider the shutdown feature if power management control is needed. Verify that the load current does not exceed 300 mA and that the input voltage remains within the specified operational limits.

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

The TC1269 series represents a family of precision linear regulators designed to replace legacy bipolar devices. This specific variant, TC1269-2.8VUA, offers a fixed 2.8 V output in an 8-pin MSOP package. It is engineered for space-constrained designs while delivering stable regulation across a wide temperature range. The series emphasizes efficiency through minimal quiescent current consumption.

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

The datasheet identifies the TC1269 as a CMOS upgrade for older bipolar low dropout regulators. Specific cross-reference part numbers are not provided in the official documentation. Designers should verify pinout compatibility and electrical parameters when replacing existing bipolar regulators with this CMOS device.