TLV77133PDBVR

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

The TLV77133PDBVR is a fixed-output low-dropout linear regulator from the Texas Instruments TLV771 series, housed in a five-pin SOT-23 package. It provides a nominal 3.3V output with a maximum continuous current of 150mA. The device operates within an input voltage range of 1.4V to 5.5V and maintains an operating junction temperature range from -40°C to +125°C. Key electrical specifications include a typical quiescent ground current of 80µA, a power-supply rejection ratio of 56dB at 100kHz, and a line regulation of 0.01%/V. Output voltage accuracy is specified at ±2% for voltages between 1.8V and 3.3V.

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

• High power-supply rejection ratio (PSRR) ensures stable performance against input noise across frequencies up to 1MHz.
• Integrated active output pulldown resistor rapidly discharges the output node when disabled to ensure a known start-up state.
• Foldback current limit protects the device during high-load faults by scaling back current as output voltage approaches ground.
• Internal soft-start circuit limits inrush current during initialization to minimize input voltage drops.

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 'PDBVR' corresponds to the SOT-23-5 package and standard production quantity. Confirm that the required output capacitance meets the stability requirements of 0.47µF minimum effective value. Ensure the application environment stays within the recommended operating conditions regarding input voltage and thermal limits.

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

Select this component when a compact solution is required for portable electronics needing 150mA drive capability. The SOT-23-5 package offers space efficiency compared to larger regulators. Consider the 56dB PSRR specification if the power source contains significant high-frequency noise. Verify that the system can accommodate the 80µA quiescent current draw during normal operation.

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

This part belongs to the TLV771 family of small-size, high-PSRR low-dropout regulators. The family includes variants with different output voltages and packages, such as the X2SON option. The TLV771 series is designed to operate with single ceramic capacitors, simplifying bill-of-materials and layout complexity for mobile and consumer applications.

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

Check datasheets for other TLV771xxPDBVR variants with different fixed output voltages. Verify pin compatibility with alternative LDO families offering similar 150mA ratings and SOT-23-5 footprints before substitution.

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

How does the device handle output discharge when disabled?

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

What is the function of the foldback current limit?

The foldback current limit transitions from a brick-wall scheme to a foldback scheme when the output voltage drops below a specific threshold, reducing current consumption during short-circuit events to manage heat dissipation.