Texas Instruments TPS727285DSET

Overview

TPS727285DSET from Texas Instruments is a 250-mA, ultralow-I_Q (7.9 μA), fast-transient-response LDO linear regulator with fixed 2.85-V output, 65-mV typical dropout at 100 mA, ±2% output accuracy over load/line/temperature, and stable operation with 1.0-μF ceramic output capacitance. It serves as a power supply for RF-sensitive, battery-powered subsystems in portable wireless devices.

For engineers reviewing the TPS727285DSET datasheet, TPS727285DSET pinout, TPS727285DSET application, or TPS727285DSET equivalent, key selection criteria include its 7.9-μA quiescent current, 70-dB PSRR at 1 kHz, ±50-mV load transient response (200 mA step), thermal shutdown at +160°C, and compatibility with 1.0-μF X5R/X7R ceramic capacitors.

Technical Context

The TPS727285DSET employs a PMOS pass transistor to achieve low dropout and high PSRR, with internal EEPROM factory programming fixing the output voltage at 2.85 V. Its band-gap reference and error amplifier deliver 2% DC accuracy across –40°C to +125°C junction temperature.

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 scales from 7.9 μA (I_OUT = 0) to 130 μA (I_OUT = 250 mA), enabling precise battery-life modeling.

Key Specifications

Pinout & Package

TPS727285DSET is housed in a 1.5-mm × 1.5-mm WSON-6 (DSE) package with wettable flank leads for automated optical inspection. The exposed pad is not electrically connected and may be left floating or grounded for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS72728YFF, the TPS727285DSET offers superior thermal performance and higher current capability in a slightly larger package; versus TPS7A0528PDBVR, it delivers 3.2× lower quiescent current and eliminates external resistors, reducing component count and layout sensitivity.

Availability

TPS727285DSET is available at Aetrix Electronics and suitable for wireless handsets, Bluetooth audio subsystems, and Zigbee sensor nodes requiring stable component supply with full lifecycle support and traceable sourcing.

Supply support for TPS727285DSET 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 and precision analog solutions.

The TPS727 family was designed specifically for ultra-low-power, RF-clean power delivery in space-constrained portable electronics - emphasizing sub-10-μA quiescent current, fast transient response, and factory-programmed outputs to simplify design-in.

FAQ

What is the output voltage tolerance of the TPS727285DSET over temperature and load?

The TPS727285DSET maintains ±2% output voltage accuracy across the full operating junction temperature range (–40°C to +125°C), over load currents from 0 to 250 mA, and input voltages from V_OUT + 0.3 V to 5.5 V. This specification is guaranteed by TI's precision band-gap reference and error amplifier, and is verified in the Electrical Characteristics table of the SBVS128F datasheet. The TPS727285DSET achieves this without external trimming components due to factory EEPROM calibration.

Can the TPS727285DSET operate with a 1.0-μF ceramic output capacitor?

Yes, the TPS727285DSET is explicitly designed to be stable with a 1.0-μF ceramic output capacitor - specifically X5R or X7R dielectrics with ESR under 200 mΩ. This eliminates the need for larger or more expensive tantalum capacitors. The datasheet confirms stability across temperature and load conditions, and Figure 25 shows the recommended 1.0-μF C_OUT in the typical application circuit. Using smaller values risks instability; larger values improve transient response but increase startup time.

What is the shutdown current of the TPS727285DSET and how is it controlled?

The TPS727285DSET draws 120 nA typical shutdown current when the EN pin is driven below 0.4 V, as specified in the Electrical Characteristics table. This ultra-low shutdown current is achieved through internal logic that disables the pass transistor and reference circuitry. The EN pin is compatible with standard TTL/CMOS logic levels, and can be tied directly to IN if shutdown functionality is not required. During shutdown, the TPS727285DSET retains no state - it fully resets on enable assertion.

Does the TPS727285DSET include built-in protection features?

Yes, the TPS727285DSET integrates thermal shutdown (trip at +160°C, reset at +140°C), output current limiting (~400 mA typical), and undervoltage lockout (UVLO with 1.90 V nominal threshold). These protections are fully functional across the –40°C to +125°C junction temperature range and do not require external components. The thermal protection cycles on/off under sustained overload, and the current limit operates independently of output voltage - ensuring robustness in fault conditions without compromising normal regulation.

How does the dropout voltage of the TPS727285DSET vary with load current?

The dropout voltage of the TPS727285DSET increases with load current due to the R_DS(ON) of its PMOS pass transistor: 65 mV typical at 100 mA, 130 mV at 200 mA, and 163 mV at 250 mA - all measured at V_IN = V_OUT(NOM) + 0.3 V. This relationship is linear and documented in Figure 5 of the SBVS128F datasheet. At light loads (<10 mA), dropout drops below 30 mV, enabling extended battery runtime in low-duty-cycle applications. The TPS727285DSET remains in regulation as long as V_IN exceeds V_OUT + V_DO.