LTC1844ES5-2.5#TRMPBF

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

The LTC1844ES5-2.5#TRMPBF is a fixed-output, low noise VLDO linear regulator providing a nominal 2.5V output with a maximum load current of 150mA. It operates from an input voltage range of 1.6V to 6.5V and maintains high accuracy within ±1.75% over temperature, voltage, and current ranges. The device features a typical dropout voltage of 45mV at 50mA and 135mV at 150mA. Quiescent current is typically 35µA during operation and drops to 10nA in shutdown mode. Output noise is specified at 60µVRMS across the 10Hz to 100kHz bandwidth.

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

• Incorporates reverse-battery and reverse-current protection for battery-powered applications
• Includes short-circuit and thermal overload protection with indefinite survival capability
• Ensures stability with ultralow ESR ceramic capacitors as small as 1µF
• Features fast transient response and low quiescent current independent of dropout voltage

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

• Portable instruments and battery-powered systems
• Bluetooth and 802.11 wireless cards
• Cellular phones
• PDAs and notebook computers

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

Verify that the component matches the specific Analog Devices part number LTC1844ES5-2.5#TRMPBF. Confirm the package type is SOT-23-5 (TSOT-23) and the suffix indicates tape and reel packaging. Ensure the manufacturer is Analog Devices Inc. or its authorized predecessor Linear Technology Corporation. Check RoHS compliance status against current datasheet specifications before procurement.

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

Select this regulator when a fixed 2.5V supply is required with minimal dropout voltage under heavy loads up to 150mA. It is suitable for designs needing micropower consumption with only 35µA quiescent current. Choose this part if the application demands stability with small ceramic output capacitors and requires protection against reverse battery connections. Consider the 10nA shutdown current for extended battery life requirements.

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

This component belongs to the LTC1844 series of very low dropout linear regulators manufactured by Analog Devices. The series includes fixed output voltages such as 1.5V, 1.8V, 2.5V, 2.8V, and 3.3V, as well as adjustable versions. These devices are designed for portable electronics requiring low noise and high efficiency. The ES5 variant specifically denotes the commercial temperature range and SOT-23-5 package configuration.

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

Direct substitutes include other parts from the LTC1844 family with different fixed output voltages, such as LTC1844ES5-1.5#TRMPBF, LTC1844ES5-1.8#TRMPBF, LTC1844ES5-2.8#TRMPBF, and LTC1844ES5-3.3#TRMPBF. These share identical pinouts and electrical characteristics except for the regulated output voltage level.