TPS77516DR

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

The TPS77516DR is a fixed-output low-dropout voltage regulator from the TPS775xx family, manufactured by Texas Instruments. It provides a stable 1.6 V output with a maximum continuous current of 500 mA. The device utilizes a PMOS pass element to achieve an ultralow typical quiescent current of 85 µA and a dropout voltage of 169 mV at full load. It operates within an input voltage range of 2.7 V to 10 V and includes an open-drain power-on reset output with a 200 ms delay. The component is housed in an 8-pin SOIC package and supports operation across a junction temperature range of -40°C to +125°C.

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

• Fast transient response capability designed for stability with low ESR capacitors
• Integrated open-drain power-on reset function with programmable delay
• Shutdown mode reduces quiescent current significantly when enabled

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

• Microcomputer and microprocessor system power supplies
• FPGA core and I/O voltage regulation
• DSP core and peripheral power delivery

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

Verify the specific ordering suffix 'R' corresponds to the tape-and-reel packaging configuration required for your assembly process. Confirm that the component status remains active as production data availability may change. Ensure the selected package variant matches your PCB footprint design specifications before finalizing procurement orders.

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

Select this regulator for applications requiring high efficiency under varying loads due to its voltage-driven PMOS architecture. The fixed 1.6 V output eliminates the need for external feedback resistors found in adjustable versions. Consider the thermal dissipation ratings relative to the ambient temperature and input voltage differential to ensure reliable operation within the specified junction temperature limits.

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

This component belongs to the TPS775xx series of fast-transient-response LDOs. The family shares common architectural features including PMOS pass elements and integrated protection circuits. Variants within the series differ primarily in fixed output voltage options and the inclusion of either reset or power-good monitoring outputs, allowing for flexible integration into various digital logic power domains.

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

TPS77516D is the tube-packaged equivalent of this reel version.

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

What is the minimum output capacitor requirement for stability?

The device requires a minimum output capacitance of 10 µF with an equivalent series resistance (ESR) between 50 mΩ and 1.5 Ω.

How does the enable pin affect quiescent current?

Applying a TTL high signal to the EN pin activates the regulator; pulling it low places the device in shutdown mode, reducing quiescent current to approximately 1 µA.