Texas Instruments TPS72728DSER

Overview

TPS72728DSER from Texas Instruments is a 2.8-V fixed-output, 250-mA ultralow-quiescent-current LDO linear regulator in a 1.5-mm × 1.5-mm WSON-6 package. It delivers 2% output accuracy over load, line, and temperature (–40°C to +125°C), features 65-mV typical dropout at 100 mA, 7.9-μA quiescent current, and stable operation with only a 1.0-μF ceramic output capacitor - ideal for battery-powered RF subsystems in smartphones and wireless sensors.

For engineers reviewing the TPS72728DSER datasheet, TPS72728DSER pinout, TPS72728DSER application, or TPS72728DSER equivalent, key selection criteria include its ultralow IQ under light load, fast load transient response (±50 mV for 200-mA step), high PSRR (70 dB at 1 kHz), thermal shutdown behavior, and compatibility with compact 1.5-mm × 1.5-mm board layouts requiring minimal external components.

Technical Context

The TPS72728DSER uses a PMOS pass transistor architecture enabling low dropout voltage that scales with output current (65 mV @ 100 mA, 130 mV @ 200 mA). Its factory-programmed EEPROM sets the 2.8-V output without external resistors, and a precision band-gap reference ensures 2% DC accuracy across –40°C to +125°C.

It integrates active-high enable logic (0.9 V threshold), undervoltage lockout (1.90 V nominal), thermal shutdown (+160°C trip), and current limiting (~400 mA typical). Ground pin current remains stable at 7.9 μA (I_OUT = 0 mA) and rises to 130 μA at 250 mA, supporting accurate power budgeting in always-on sensor nodes.

Key Specifications

Pinout & Package

TPS72728DSER is housed in a thermally enhanced 1.5-mm × 1.5-mm WSON-6 (DSE) package with exposed thermal pad (not electrically connected). The 6-pin configuration supports compact two-layer PCB routing and efficient heat dissipation via soldered pad to inner ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS72728YFF, the DSE variant offers superior thermal performance and simpler assembly; versus MCP1700T-2802E/TT, it trades slightly higher IQ for dramatically better transient response, PSRR, and temperature range - critical for RF and automotive applications.

Availability

TPS72728DSER is available at Aetrix Electronics and suitable for smartphone RF subsystems, BLE sensor nodes, industrial wireless monitors, and automotive cabin cameras requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for TPS72728DSER 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets.

The TPS727 family was developed specifically for power-sensitive portable electronics - delivering ultralow IQ, fast transient response, and factory-programmed outputs in wafer-level and SON packages to minimize size and design complexity.

FAQ

What is the maximum input voltage for the TPS72728DSER?

The TPS72728DSER supports an absolute maximum input voltage of +6.0 V, but its recommended operating range is 2.0 V to 5.5 V. Operation above 5.5 V risks permanent damage, while inputs below 2.0 V may not sustain regulation due to dropout constraints - for example, at 2.8-V output, minimum functional VIN is ~2.865 V (2.8 V + 65 mV dropout).

Does the TPS72728DSER require an input capacitor?

The TPS72728DSER does not require an input capacitor for stability, but TI recommends a 0.1-μF to 1.0-μF ceramic capacitor between IN and GND to improve PSRR, reduce input ripple coupling, and enhance load transient response - especially when the device is distant from the power source or shares a rail with switching regulators.

How does the enable pin (EN) function on the TPS72728DSER?

The EN pin on the TPS72728DSER is active-high: driving it above 0.9 V enables regulation, while pulling it below 0.4 V places the device in shutdown mode, reducing ground current to 120 nA. When shutdown is unused, EN may be directly tied to IN - no external pull-up is required, simplifying circuit design.

Can the TPS72728DSER be used with a 1.0-μF output capacitor?

Yes - the TPS72728DSER is explicitly designed and tested to be stable with a 1.0-μF or larger X5R/X7R ceramic output capacitor. This eliminates the need for ESR tuning or additional compensation components, reducing BOM count and board area versus traditional LDOs requiring 10–22-μF tantalum capacitors.

What protection features are integrated into the TPS72728DSER?

The TPS72728DSER integrates thermal shutdown (trips at +160°C, resets at +140°C), output current limiting (~400 mA typical), and undervoltage lockout (UVLO activates below ~1.90 V). These functions operate autonomously without external components, safeguarding both the regulator and downstream circuitry during fault conditions.