Texas Instruments TPS728185295YZUT

Overview

TPS728185295YZUT from Texas Instruments is a 200mA low-dropout linear regulator with pin-selectable dual-output voltages (1.85V and 2.95V), 3% accuracy over load/line/temperature, 230mV typical dropout at 200mA, and ultra-low 50μA quiescent current - designed for dynamic voltage scaling in nanoscale processors and memory card power management.

For engineers reviewing the TPS728185295YZUT datasheet, TPS728185295YZUT pinout, TPS728185295YZUT application, or TPS728185295YZUT equivalent, key selection criteria include dual-voltage toggle timing (<40μs), WCSP-5 thermal performance (R_θJA = 268°C/W), stable operation with 1.0μF ceramic output capacitance, and EEPROM-programmed factory-set VOUT1/VOUT2 pairing.

Technical Context

The TPS728185295YZUT implements a PMOS pass transistor architecture with internal EEPROM-programmed dual-output voltage levels (VOUT1 = 1.85V, VOUT2 = 2.95V), selected via the VSET pin logic threshold (VLO ≤ 0.4V, VHI ≥ 1.2V). It features active pulldown during shutdown and UVLO with 230mV hysteresis.

Its control loop employs low-current mode circuitry to maintain regulation down to zero load, enabling stable operation across 0–200mA while delivering 65dB PSRR at 1kHz and 75×V_OUT μV_RMS output noise - critical for RF-sensitive and low-power portable systems.

Key Specifications

Pinout & Package

TPS728185295YZUT uses the YZU package: a 5-pin wafer chip-scale package (WCSP), 1.2mm × 0.8mm, 0.4mm pitch, with solder ball terminations. Thermal performance is optimized via bottom-side thermal pad connection to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS728185315YZUT and TPS728175295YZUT, the TPS728185295YZUT uniquely balances 1.85V logic compatibility with 2.95V memory interface margin - offering optimal voltage spacing for JEDEC-standard LPDDR2/LPDDR3 I/O and core rails in space-constrained handheld designs.

Availability

TPS728185295YZUT is available at Aetrix Electronics and suitable for mobile processor power management, secure memory card interfaces, wireless handset RF subsystems, and low-power IoT sensor nodes requiring stable component supply with guaranteed long-term availability.

Supply support for TPS728185295YZUT 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 ICs, with decades of LDO design heritage and broad automotive/industrial qualification.

The TPS728xx series was developed specifically for dynamic voltage scaling in nanoscale SoCs and memory subsystems - prioritizing ultra-small footprint, dual-rail flexibility, and zero-load stability in battery-powered portable electronics.

FAQ

What are the exact factory-programmed output voltages of the TPS728185295YZUT?

The TPS728185295YZUT is factory-programmed with two precise output voltages: 1.85V when the VSET pin is driven low (≤0.4V), and 2.95V when VSET is driven high (≥1.2V). These values are stored in on-die EEPROM and verified across –40°C to +125°C, with ±3% total accuracy including load, line, and temperature effects. No external components or calibration are required to achieve these outputs.

Does the TPS728185295YZUT require an external resistor network to set its output voltages?

No, the TPS728185295YZUT does not require any external resistors. Its dual output voltages (1.85V and 2.95V) are permanently programmed into internal EEPROM during manufacturing. The VSET pin acts solely as a digital select signal - driving it low or high toggles between the two pre-programmed rails without altering the voltage values themselves.

Can the TPS728185295YZUT operate stably with less than 1.0μF output capacitance?

No - the TPS728185295YZUT is specified and characterized for stability only with ≥1.0μF ceramic output capacitance (X5R or X7R dielectric). Using smaller capacitors risks oscillation or degraded transient response. The 1.0μF value is a hard design requirement, not a recommendation, and is validated across temperature and load conditions per the SBVS095 datasheet.

What is the maximum allowable input voltage for the TPS728185295YZUT?

The absolute maximum input voltage for the TPS728185295YZUT is +7.0V, but the recommended operating range is 2.7V to 6.5V. Operation above 6.5V is not characterized and may compromise reliability or parametric performance. For 2.95V output, minimum valid VIN is 3.18V (2.95V + 230mV dropout), ensuring the device remains outside dropout region under full 200mA load.

How does the thermal pad on the TPS728185295YZUT package function, and is it mandatory to connect?

The thermal pad on the TPS728185295YZUT's YZU WCSP package is electrically connected to GND and is mandatory for both thermal performance and electrical integrity. TI specifies that the pad must be soldered to a PCB ground plane to achieve the rated R_θJA of 268°C/W and prevent junction overheating. Leaving it unconnected degrades thermal resistance by >40% and risks premature thermal shutdown under 150mA+ loads.