TLV77112PDQNR

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

The TLV77112PDQNR is a fixed-output low-dropout linear regulator from Texas Instruments, providing a nominal 1.2V output with a maximum current of 150mA. It operates within an input voltage range of 1.4V to 5.5V and maintains an output voltage accuracy of ±2%. The device features high power-supply rejection ratio (PSRR) performance, reaching 56dB at 100kHz and 55dB at 1MHz. Quiescent ground current is typically 80µA, while shutdown current drops to 2µA. Dropout voltage is specified at 260mV maximum at 150mA. It utilizes a 4-pin X2SON package.

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

• High PSRR performance ensures effective noise suppression across frequencies up to 1MHz.
• Integrated active output pulldown resistor rapidly discharges the output when disabled.
• Foldback current limit protects against transient faults and short circuits by scaling back current as voltage drops.
• Internal soft-start circuit minimizes inrush current during startup to prevent input voltage droop.

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

• Smartphones
• Tablets
• Gaming consoles
• Notebooks
• Camera modules

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

Verify the specific ordering suffix 'R' indicates reel packaging configuration. Confirm the 'P' designation corresponds to the active discharge feature. Ensure the 'DQN' package code matches the required 4-pin X2SON footprint. Validate RoHS compliance status for environmental requirements. Check thermal pad connection guidelines for the DQN package during assembly.

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

Select this component for applications requiring small form factors and high noise immunity. The 1.2V fixed output suits digital logic or sensor rails. Verify input voltage remains above dropout limits under all load conditions. Ensure output capacitance meets stability requirements. Consider thermal dissipation if operating near maximum junction temperature limits.

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

This part belongs to the TLV771 series of low-dropout regulators designed for portable electronics. The series offers various fixed output voltages ranging from 0.6V to 3.3V. All variants share similar electrical characteristics including high PSRR and low quiescent current. The TLV77112 specifically provides the 1.2V rail necessary for many embedded systems.

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

TLV77112PDQNT serves as a tape-and-reel alternative with identical electrical specifications. TLV77112DBVR provides the same functionality in a 5-pin SOT-23 package. Verify pin compatibility and thermal performance when substituting packages.

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

How does the active discharge feature function?

An internal MOSFET connects a pulldown resistor between the output and ground when the enable pin is low or input voltage falls below the UVLO threshold, ensuring the output discharges quickly.

What is the purpose of the foldback current limit?

It protects the device during short-circuit events by reducing the output current as the output voltage approaches ground, preventing excessive power dissipation and thermal shutdown cycling.