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MC78LC33NTRG

ONMC78LC33NTRG

onsemi
Linear Voltage Regulator IC Positive Fixed 1 Output 80mA 5-TSOP
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Overview

The MC78LC33NTRG is a fixed 3.3V linear voltage regulator designed for low-power applications requiring minimal overhead and board space. It features an extremely low quiescent current of 1.1 uA, making it ideal for battery-operated devices that spend significant time in standby modes. The device is housed in a compact 5-TSOP (Thin SOT-23-5) package and provides up to 80mA of output current.

Why Choose This Part

The primary advantage is the ultra-low 1.1 uA typical quiescent current, which is significantly lower than standard LDOs. It also features a very low dropout voltage of 0.053V at 1mA and an output accuracy of 2.5 percent within a compact 5-pin surface mount footprint.

Applications

Battery-Powered Portable Gear
The ultra-low 1.1 uA quiescent current extends battery life in handheld instruments and consumer electronics.
Post-Regulation
Use after a switching regulator to provide a clean, 3.3V rail for noise-sensitive analog circuitry.
Keep-Alive Power Supplies
Maintains power to real-time clocks (RTC) or memory during system sleep states with negligible power draw.
Remote Sensors
Provides stable power for low-bandwidth industrial sensors that operate at temperatures between -40C and 85C.

Key Specifications

Output Type Fixed
Mounting Type Surface Mount
Package / Case SOT-23-5 Thin, TSOT-23-5
Current - Output 80mA
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 85degC
Voltage - Input (Max) 12V
Voltage Dropout (Max) 0.053V @ 1mA
Supplier Device Package 5-TSOP
Current - Quiescent (Iq) 3.6 uA
Voltage - Output (Min/Fixed) 3.3V

Getting Started

When designing with this LDO, ensure input and output capacitors are placed as close to the 5-TSOP pins as possible to maintain stability. Review the datasheet for ESR requirements of the output capacitor, typically a small ceramic or tantalum type, to prevent oscillation during 80mA load transients.

Also Consider

MCP1700T-3302E/TT MCHPMicrochip Technology - A popular low-quiescent current LDO with a 250mA output limit in a SOT-23 package.
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