Texas Instruments TPS78225DRVT

Overview

TPS78225DRVT from Texas Instruments is a fixed 2.5-V, 150-mA ultra-low-quiescent-current LDO regulator in a 2-mm × 2-mm SON-6 (DRV) package. It delivers 500 nA quiescent current, 130 mV dropout at 150 mA and ±3% output accuracy over load, line, and temperature - optimized for battery-powered microcontroller systems such as TI MSP430-based sensor nodes and portable medical devices.

For engineers reviewing the TPS78225DRVT datasheet, TPS78225DRVT pinout, TPS78225DRVT application, or TPS78225DRVT equivalent, key selection criteria include ultra-low IQ operation down to 500 nA, stable regulation with only 1.0-μF ceramic output capacitance, CMOS-compatible enable threshold (1.2 V turn-on), thermal shutdown at 160°C, and compatibility with low-voltage logic interfaces in space-constrained designs.

Technical Context

The TPS78225DRVT uses a PMOS pass transistor architecture enabling ultra-low dropout and near-zero load-dependent quiescent current. Its internal active pulldown discharges VOUT during shutdown when VIN > 2.2 V, and its enable input supports standard CMOS logic levels with 1.2 V rising threshold and 0.4 V falling threshold.

It operates across –40°C to +125°C junction temperature, features integrated thermal shutdown (trip at 160°C, reset at 140°C) and current limiting (150–400 mA), and maintains stability with ≥1.0-μF X5R/X7R ceramic capacitors - no minimum load required.

Key Specifications

Pinout & Package

TPS78225DRVT is housed in a thermally enhanced 2-mm × 2-mm SON-6 (DRV) package with an exposed thermal pad. The package supports high power density and efficient heat transfer to the PCB ground plane via soldered thermal pad connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-IQ LDO applications.

Compared with TPS78225DDCR, the TPS78225DRVT provides superior thermal performance (RθJB = 35.4°C/W vs. 34.3°C/W) and smaller footprint, while TPS78025DRVR trades marginally higher dropout for programmable voltage scaling - making TPS78225DRVT optimal for fixed-voltage, thermally constrained, ultra-low-power applications.

Availability

TPS78225DRVT is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, smart wearables, and industrial wireless transmitters requiring stable component supply across long-lifecycle deployments.

Supply support for TPS78225DRVT 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for battery-operated and industrial systems.

The TPS782 family was designed specifically for ultra-low-power, battery-critical applications - targeting microcontrollers like the MSP430, where nanoscale quiescent current and minimal external components define system viability.

FAQ

What is the output voltage tolerance of the TPS78225DRVT over temperature and load?

The TPS78225DRVT maintains ±3% DC output accuracy over the full operating temperature range (–40°C to +125°C), across all load conditions (0–150 mA) and input voltages (2.2–5.5 V). This specification is guaranteed in the datasheet's Electrical Characteristics table and ensures reliable operation for precision analog and digital loads without external trimming.

Does the TPS78225DRVT require an input capacitor for stability?

The TPS78225DRVT does not require an input capacitor for stability, but TI strongly recommends placing a 0.1-μF to 1.0-μF low-ESR ceramic capacitor between IN and GND. This improves transient response, reduces noise coupling, and mitigates voltage excursions caused by source impedance - especially important in battery-fed or high-impedance supply scenarios.

Can the TPS78225DRVT operate with zero load current?

Yes, the TPS78225DRVT is fully stable and functional at zero load current. Unlike traditional PMOS LDOs, it employs a low-current circuit that maintains loop gain and output regulation even with no output load - confirmed in the datasheet's "Minimum Load" section and Figure 19 (load transient response).

What is the maximum junction temperature before thermal shutdown activates in the TPS78225DRVT?

The TPS78225DRVT activates thermal shutdown when junction temperature reaches approximately 160°C. Once tripped, the device disables output until junction temperature cools to approximately 140°C, at which point regulation resumes. This hysteresis prevents oscillation and protects against sustained overheating.

Is the TPS78225DRVT pin-compatible with other members of the TPS782 family?

Yes, all TPS782x DRV-packaged variants (e.g., TPS78218DRVT, TPS78233DRVT) share identical pinout, package dimensions, and thermal pad layout. Only the fixed output voltage differs - allowing drop-in replacement across the family when board layout accommodates the same 2-mm × 2-mm SON-6 footprint.