Texas Instruments TPS728180300YZUT

Overview

TPS728180300YZUT from Texas Instruments is a 200mA low-dropout linear regulator with pin-selectable dual-output voltages (1.80V and 3.00V), 230mV typical dropout at full load, ±3% output accuracy over load/line/temperature, and stable operation with only a 1.0μF ceramic output capacitor. It serves as a power management IC in ultra-compact handheld devices requiring dynamic voltage scaling between active and low-power states.

For engineers reviewing the TPS728180300YZUT datasheet, TPS728180300YZUT pinout, TPS728180300YZUT application, or TPS728180300YZUT equivalent, key selection criteria include dual-voltage toggle timing (<40μs), ultra-low 50μA quiescent current in active mode, thermal shutdown at +160°C, WCSP-5 package footprint compatibility, and EEPROM-programmed fixed outputs eliminating external feedback components.

Technical Context

The TPS728180300YZUT implements a PMOS pass transistor architecture enabling low dropout and inherent reverse-current blocking. Its VSET pin directly controls an internal multiplexer to select between two factory-programmed output voltages without external resistors or digital interface overhead.

Internal circuitry includes precision bandgap reference, error amplifier with 3% total accuracy, undervoltage lockout (2.38–2.65V threshold), active pulldown for fast discharge during shutdown, and thermal shutdown with hysteresis (+140°C reset). It operates across –40°C to +125°C junction temperature with no minimum load requirement.

Key Specifications

Pinout & Package

TPS728180300YZUT uses the YZU wafer-level chip-scale package (WCSP-5), 1.2mm × 1.2mm, 0.5mm pitch, with solder bumps on five terminals. Thermal performance relies on PCB copper area under the die; no exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS728180300DRVR, the YZU package offers 60% smaller footprint but limits thermal headroom; compared with TPS728175295YZUR, the 1.80V/3.00V outputs provide precise alignment with standard 1.8V logic and 3.0V analog subsystems.

Availability

TPS728180300YZUT is available at Aetrix Electronics and suitable for mobile memory card power, dynamic voltage scaling, EEPROM programming interfaces, and low-power wireless sensor nodes requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS728180300YZUT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The TPS728xx series was designed specifically for ultra-compact portable devices requiring dual-voltage rail generation with zero external components-targeting nanometer-process leakage reduction and fast wake-up in battery-powered systems.

FAQ

What are the factory-programmed output voltages of the TPS728180300YZUT?

The TPS728180300YZUT is factory-programmed with two fixed output voltages: 1.80V (selected when VSET < 0.4V) and 3.00V (selected when VSET > 1.2V). These values are permanently stored in on-chip EEPROM and cannot be altered in the field. The "180300" in the part number explicitly denotes this 1.80V/3.00V pairing.

Does the TPS728180300YZUT require an external resistor network to set output voltage?

No, the TPS728180300YZUT does not require any external resistors. Its dual output voltages are programmed into internal EEPROM during manufacturing, and the VSET pin acts solely as a digital select signal-not a feedback node. This eliminates resistor tolerance errors, layout sensitivity, and BOM cost associated with adjustable LDOs.

Can the TPS728180300YZUT operate without an output capacitor?

No, the TPS728180300YZUT requires a minimum 1.0μF ceramic capacitor (X5R or X7R) from OUT to GND for stability. While it is stable with no load, omitting the output capacitor will cause oscillation and loss of regulation. The capacitor must be placed within 3mm of the OUT and GND pins to maintain PSRR and transient performance.

What is the maximum input voltage rating for the TPS728180300YZUT?

The absolute maximum input voltage for the TPS728180300YZUT is +7.0V, but the recommended operating range is 2.7V to 6.5V. Operation above 6.5V risks exceeding internal power dissipation limits, especially at high output currents or elevated ambient temperatures. The device includes undervoltage lockout (UVLO) that prevents startup below ~2.38V.

How does the TPS728180300YZUT handle reverse current flow from OUT to IN?

Like all PMOS-based LDOs, the TPS728180300YZUT contains a body diode from OUT to IN. When VOUT exceeds VIN, this diode conducts uncontrolled reverse current. To prevent damage or system malfunction, external reverse-current protection (e.g., a series Schottky diode or ideal diode controller) is required if reverse voltage conditions are possible in the application.