The Texas Instruments TPS78511QKVURQ1 is a low-dropout linear regulator, or LDO, designed for applications requiring a stable output voltage, low noise and good response to load transients.

This version provides a positive fixed 1.1V output and supports up to 1A output current, making it suitable for powering digital circuits, microcontrollers, processors, communication modules, sensors, sensitive analog circuits and embedded systems requiring a low-voltage regulated rail.

The TPS785-Q1 family from Texas Instruments is designed for automotive applications, with AEC-Q100 qualification and operation in demanding conditions. The device supports input voltage up to 6V and includes important functions such as Enable, internal soft-start, active output discharge and protection against fault conditions.

The TO-252-5 / DPAK surface-mount package allows good thermal dissipation when used with a suitable PCB layout. It is a good solution for designs requiring up to 1A current, stability, reliability and compact dimensions.

Main features

Linear LDO regulator
Manufacturer / brand: Texas Instruments
Manufacturer reference: TPS78511QKVURQ1
Base product number: TPS78511
Family: TPS785-Q1
Regulator type: linear, low-dropout, LDO
Output configuration: positive
Output type: fixed
Fixed output voltage: 1.1V
Output current: 1A
Maximum input voltage: 6V
Family input range: 1.7V to 6.0V
Listed maximum dropout voltage: 0.915V at 1A
Typical family quiescent current: 25µA
Listed PSRR: 60dB to 30dB from 1kHz to 1MHz
Control features: Enable
Protection features: overcurrent and overtemperature
Internal soft-start: yes
Active output discharge: yes
Operating temperature: -40°C to 150°C TJ
Grade: automotive
Qualification: AEC-Q100
Mounting type: surface mount / SMD
Package: TO-252-5, DPAK, TO-252AD
Supplier device package: TO-252-5
Number of regulators: 1
Main application: DC voltage regulation for compatible electronic circuits**

Recommended applications

1.1V regulated power supplies
Automotive electronics
Embedded systems
Compatible microcontrollers and processors
Low-voltage digital circuits
Communication modules
Sensors and sensitive analog circuits
Post-regulation after DC/DC converters
Compact SMD boards
Projects requiring an LDO up to 1A
Equipment requiring good power-supply noise rejection
Repair and replacement in compatible circuits

Important note

Before use, always confirm the input voltage, required output voltage, load current, thermal dissipation, package, pinout, recommended PCB layout, input and output capacitors and compatibility with the original circuit.

This regulator is a 1.1V fixed-output version. It should not be used as a direct replacement for versions with other output voltages without checking the schematic or datasheet.

As this is a linear regulator, power dissipation depends on the difference between input voltage and output voltage multiplied by the load current. At higher currents, attention must be paid to the thermal plane, copper area, airflow and ambient temperature.

This product is sensitive to electrostatic discharge. Use proper ESD handling precautions. This item corresponds only to the TPS78511QKVURQ1 integrated circuit. PCB, heatsink, capacitors, resistors, cables and other components are not included unless expressly stated otherwise.