Texas Instruments TPS73HD301PWPR

Overview

TPS73HD301PWPR from Texas Instruments is a dual-output LDO voltage regulator with fixed 3.3-V output on Regulator #2 and adjustable output (1.2–9.75 V) on Regulator #1, supporting up to 750 mA per channel. It features ultra-low dropout (<80 mV at 100 mA), 340 µA typical quiescent current per regulator, dual active-low reset signals with 200-ms pulse width, and operates across −40°C to 125°C for DSP and split-supply embedded systems.

For engineers reviewing the TPS73HD301PWPR datasheet, TPS73HD301PWPR pinout, TPS73HD301PWPR application, or TPS73HD301PWPR equivalent, key selection criteria include dual-rail regulation capability, thermal performance in PowerPAD TSSOP-28, remote sense/feedback support, reset timing accuracy, and compatibility with battery-powered or high-reliability industrial designs requiring stable dual-voltage sequencing.

Technical Context

The TPS73HD301PWPR integrates two independent LDO regulators sharing a common thermal substrate but with separate inputs, enables, grounds, and feedback paths-enabling flexible power domain partitioning. Regulator #1 uses an external resistor divider on 1FB/SENSE for programmable output; Regulator #2 delivers a factory-trimmed 3.3-V output with dedicated 2SENSE input for remote sensing.

Each regulator includes overcurrent limiting (2 A short-circuit peak), thermal shutdown (165°C), and precision reset monitoring with hysteresis. The dual reset outputs (1RESET, 2RESET) are independently triggered by their respective output voltages falling below trip thresholds (2.868 V for 3.3-V rail), with guaranteed 100–300 ms timeout delay across temperature.

Key Specifications

Pinout & Package

TPS73HD301PWPR is housed in a 28-pin PowerPAD™ TSSOP package (PWP), featuring an exposed thermal pad on the underside for enhanced heat dissipation. The package supports up to 4.3 W power dissipation with 300 CFM airflow when mounted per TI's recommended copper heat sink pattern on multilayer PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output LDO regulator applications.

Compared with TPS73HD301PWPR, the TPS73HD318PWPR and TPS73HD325PWPR offer identical thermal, sequencing, and packaging performance but replace the adjustable Regulator #1 with factory-trimmed 1.8-V or 2.5-V outputs-reducing design complexity where programmability is unnecessary and improving initial accuracy at the cost of voltage flexibility.

Availability

TPS73HD301PWPR is available at Aetrix Electronics and suitable for DSP power management, FPGA dual-rail supply, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned thermal reliability.

Supply support for TPS73HD301PWPR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies with over 50 years of innovation in high-reliability power solutions.

The TPS73HD3xx family was designed specifically for DSP and mixed-voltage embedded systems requiring dual-rail LDO regulation, precise reset control, and thermal resilience in compact packages-addressing the need for integrated, low-dropout, high-current power delivery in space-constrained applications.

FAQ

What output voltages does the TPS73HD301PWPR provide?

The TPS73HD301PWPR provides two independent outputs: Regulator #2 delivers a fixed 3.3 V ±2.2% over temperature, while Regulator #1 is adjustable from 1.2 V to 9.75 V using external resistors on the 1FB/SENSE pin. This allows flexible core/I/O voltage pairing-for example, 3.3 V for peripherals and 1.8 V for a DSP core-without requiring additional regulators.

What is the maximum dropout voltage specification for the TPS73HD301PWPR at full load?

The TPS73HD301PWPR has a maximum dropout voltage of 800 mV at 750 mA load for the 3.3-V regulator (Regulator #2), measured at VI = 3.23 V and −40°C to 125°C. At lighter loads (100 mA), dropout is ≤100 mV, enabling efficient operation near battery end-of-discharge voltage.

How does the TPS73HD301PWPR handle thermal management in high-power applications?

The TPS73HD301PWPR uses Texas Instruments' PowerPAD™ TSSOP-28 package with an exposed thermal pad. With proper PCB copper pour (e.g., 6 in² on inner layers), it achieves ΘJA as low as 17.3°C/W under 300 CFM airflow-supporting up to 4.3 W dissipation and full 750-mA output per regulator at 85°C ambient without derating.

Can the TPS73HD301PWPR support remote voltage sensing for improved regulation accuracy?

Yes-the TPS73HD301PWPR supports remote sensing on both regulators: Regulator #1 uses the 1FB/SENSE pin for feedback loop closure, and Regulator #2 uses the dedicated 2SENSE pin. This compensates for PCB trace IR drop, maintaining ±1% output accuracy at the load even with 100 mΩ series resistance.

What are the reset timing characteristics of the TPS73HD301PWPR?

The TPS73HD301PWPR features two independent active-low reset outputs (1RESET and 2RESET) with a nominal timeout delay of 200 ms. Over temperature (−40°C to 125°C), the delay ranges from 100 ms to 300 ms. Each reset triggers when its respective output falls below its trip threshold (2.868 V for the 3.3-V rail), with 18-mV hysteresis for noise immunity.