Texas Instruments TPS720102YZUR

Overview

TPS720102YZUR from Texas Instruments is a 350 mA ultra-low VIN, RF-grade low-dropout linear regulator with dual-rail architecture (VIN and VBIAS), delivering 1.02 V output at ±2% accuracy over –40°C to 125°C. It features 38 μA quiescent current, 110 mV dropout at full load, 48 μVRMS output noise (10 Hz–100 kHz), and stable operation with only 2.2 μF ceramic output capacitance. It is deployed in cellular camera phones and wireless LAN modules where low-noise, fast transient response, and bias-rail efficiency are critical.

For engineers reviewing the TPS720102YZUR datasheet, TPS720102YZUR pinout, TPS720102YZUR application, or TPS720102YZUR equivalent, key selection criteria include its dual-rail input architecture (VIN ≤ VBIAS), light-load regulation with floating IN pin, monotonic soft-start (140 μs), and compatibility with sub-1.1 V output voltages - all validated for handheld RF power management.

Technical Context

The TPS720102YZUR employs an NMOS pass transistor with integrated body diode and uses BICMOS fabrication to achieve 110 mV dropout at 350 mA while maintaining 2% output accuracy across load, line, temperature, and process. Its dual-rail design separates main power path (VIN) from control circuit supply (VBIAS), enabling VIN as low as VOUT + 0.5 V when VBIAS ≥ VOUT + 1.4 V or 2.5 V (whichever is greater).

It implements a dedicated inrush current limit architecture that caps VIN current at 100 mA + ILOAD during startup, ensures monotonic VOUT rise with <3% overshoot, and supports light-load regulation (<500 μA) with IN pin floating - sourcing current solely from VBIAS under that condition. UVLO on VBIAS (2.45 V nominal, 150 mV hysteresis) and thermal shutdown (160°C trip) provide robust fault protection.

Key Specifications

Pinout & Package

TPS720102YZUR is packaged in a 1.33 mm × 0.96 mm, 5-pin DSBGA (YZU) package with bottom-side solder balls. Thermal performance is optimized via PCB copper pour under the thermal pad (pin 5/GND). The package is RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS720102YZUR, TPS720105YZUR offers identical performance at 1.05 V - making it a direct voltage variant alternative - while TPS79510DRVR lacks bias-rail efficiency, light-load floating-IN operation, and RF-grade noise/PSRR, limiting its use to non-critical digital rail applications.

Availability

TPS720102YZUR is available at Aetrix Electronics and suitable for cellular camera phones, wireless LAN modules, and handheld medical sensors requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for FDA-regulated designs.

Supply support for TPS720102YZUR 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 expertise in high-reliability, low-power, and RF-optimized solutions.

The TPS720 family was designed specifically for ultra-low-noise, dual-rail power management in battery-powered RF and imaging systems - prioritizing sub-1.1 V output accuracy, floating-IN light-load operation, and 100 kHz+ PSRR for coexistence with switching regulators.

FAQ

What is the factory-programmed output voltage of the TPS720102YZUR?

The TPS720102YZUR is factory-programmed to deliver a precise 1.02 V output voltage. This value is trimmed into on-chip EEPROM and guaranteed within ±2% over –40°C to 125°C junction temperature, full load range (0–350 mA), and line variations. It is not adjustable externally and differs from other members of the TPS720xx family such as the 1.05 V TPS720105YZUR or 1.3 V TPS72013YZUR.

Can the TPS720102YZUR regulate when the IN pin is left unconnected?

Yes, the TPS720102YZUR supports light-load regulation with the IN pin floating - a unique feature enabled by its dual-rail architecture. When IN is unconnected, the device draws current solely from the VBIAS rail to maintain 1.02 V regulation for loads up to 500 μA. This is especially valuable in power-saving states where upstream DC-DC converters are disabled but the LDO must remain active for memory retention or sensor biasing.

What are the minimum and maximum allowable voltages on the VBIAS pin of the TPS720102YZUR?

The VBIAS pin of the TPS720102YZUR requires a supply between 2.5 V and 5.5 V, or ≥ VOUT + 1.4 V (i.e., ≥ 2.42 V), whichever is greater. Since VOUT = 1.02 V, the effective minimum is 2.5 V. Exceeding 5.5 V risks damage, and falling below 2.41 V triggers undervoltage lockout (UVLO), disabling regulation until VBIAS rises above 2.49 V (with 150 mV hysteresis).

Is the TPS720102YZUR stable with ceramic output capacitors, and what value is required?

Yes, the TPS720102YZUR is explicitly designed for stability with standard X5R or X7R ceramic capacitors. A minimum 2.2 μF output capacitance is required - with ESR ≤ 250 mΩ - to ensure loop stability, adequate transient response, and noise filtering. Larger values improve load transient suppression but are not necessary for basic functionality. No tantalum or electrolytic capacitors are needed or recommended.

Does the TPS720102YZUR provide overcurrent and thermal protection?

Yes, the TPS720102YZUR integrates both overcurrent and thermal protection. Its internal current limit activates between 420 mA and 800 mA depending on operating conditions, preventing damage during short circuits. Thermal shutdown engages at 160°C junction temperature, disabling the output until the die cools to ~140°C, after which automatic recovery occurs. These protections are fully characterized over –40°C to 125°C and require no external components.