LT3055EDE#TRPBF

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

The LT3055EDE#TRPBF is a micropower, low noise, low dropout voltage (LDO) linear regulator from Analog Devices. It supplies 500mA of output current with a typical dropout voltage of 350mV. The device features a ±45V input voltage rating and includes precision current limit and diagnostic functions. A 10nF bypass capacitor reduces output noise to 25μVRMS in a 10Hz to 100kHz bandwidth and soft starts the reference. It is available as an adjustable device with an output voltage range from 0.6V to 40V.

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

• Precision current limit programmable via a single resistor with ±10% accuracy over a wide input voltage and temperature range.
• Integrated diagnostic functions including logic fault pins for current limit, thermal limit, and minimum output current conditions, plus a power good indicator.
• Output current monitor sources a current equal to 1/500th of the output current for external sensing.
• Internal protection circuitry provides reverse battery, reverse current, reverse output, and thermal limiting protection.

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

• Protected antenna supplies
• Automotive telematics
• Industrial applications such as trucks and forklifts
• High reliability applications
• Noise-sensitive RF or DSP supplies

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

Verify the specific package type and temperature grade when ordering. The #TRPBF suffix indicates tape and reel packaging with lead-free finish. Confirm that the selected part matches the required operating junction temperature range for the application environment. Ensure compatibility with the 16-lead DFN footprint during PCB layout.

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

Select this regulator for applications requiring robust diagnostics and high input voltage tolerance up to 45V. The adjustable version allows output voltages from 0.6V to 40V. Ensure the output capacitor meets the minimum capacitance requirement for stability with low ESR ceramic capacitors. Consider the thermal performance and heat dissipation requirements given the exposed pad package.

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

This component belongs to the LT3055 series of linear regulators designed for high-reliability environments. The series combines micropower operation with low noise characteristics. It is engineered to withstand harsh electrical conditions, making it suitable for automotive and industrial sectors where system integrity and fault detection are critical.

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

LT3055EDE#PBF

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

How is the precision current limit programmed?

The current limit is programmed using a single resistor connected between the IMAX pin and ground. The accuracy is maintained within ±10% over a wide input voltage and temperature range.

What is the function of the TEMP pin?

The TEMP pin outputs a voltage proportional to the average die temperature. It provides 250mV at 25°C with a slope of 10mV/°C, allowing for external temperature monitoring.

How does the device handle reverse input conditions?

The LT3055 withstands reverse voltages on the IN pins. In case of reverse input, it acts like a diode in series with the input, preventing reverse current flow and protecting both the device and the load.