Texas Instruments TPS72748YFFT

Overview

TPS72748YFFT from Texas Instruments is a 4.8-V fixed-output, 250-mA ultralow-I_Q LDO linear regulator in a 4-ball DSBGA package (1.20 mm × 0.80 mm), featuring 65 mV typical dropout at 100 mA, 7.9 µA quiescent current, and ±50 mV load transient response for 200 mA step changes. It powers RF-sensitive analog rails in compact portable devices.

For engineers reviewing the TPS72748YFFT datasheet, TPS72748YFFT pinout, TPS72748YFFT application, or TPS72748YFFT equivalent, key selection criteria include its 2% output accuracy over –40°C to +125°C, 70 dB PSRR at 1 kHz, stability with 1.0-µF ceramic output capacitance, and active-high enable with 0.9 V logic threshold.

Technical Context

The TPS72748YFFT uses a PMOS pass transistor architecture enabling low dropout and high PSRR without requiring a noise-reduction capacitor. Its factory-programmed EEPROM sets the 4.8-V output voltage, eliminating external feedback resistors.

It integrates thermal shutdown (trip at +160°C, reset at +140°C), overcurrent protection (typical 400 mA limit), undervoltage lockout (1.90 V nominal), and soft-start with 0.07 V/µs output ramp rate - all operating across –40°C to +125°C junction temperature.

Key Specifications

Pinout & Package

TPS72748YFFT is housed in a 4-ball, 0.4-mm pitch wafer-level chip-scale package (DSBGA-4), measuring 1.20 mm × 0.80 mm with bottom-side solder balls. Ball A1 is marked by a top-side dot on 4.8-V variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS72748DSET, the TPS72748YFFT offers superior size efficiency and lower thermal resistance to board (76 °C/W vs 149.3 °C/W), while MCP1700T-4802E/TT trades protection and RF performance for ultra-low I_Q, making it unsuitable for demanding portable RF systems.

Availability

TPS72748YFFT is available at Aetrix Electronics and suitable for wireless handsets, Bluetooth® audio devices, and portable medical instrumentation requiring stable component supply with full lifecycle support.

Supply support for TPS72748YFFT 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 engineered for power-sensitive portable electronics, delivering ultralow quiescent current, fast transient response, and RF-optimized PSRR in wafer-level chip-scale packages.

FAQ

What is the maximum input voltage rating for the TPS72748YFFT?

The TPS72748YFFT has an absolute maximum input voltage of +6.0 V. Operation above this level risks permanent damage. The recommended operating range is 2.0 V to 5.5 V, ensuring reliable regulation while maintaining low dropout and thermal safety margins across the full –40°C to +125°C junction temperature range. Exceeding 5.5 V may trigger internal protection circuits or degrade long-term reliability.

Does the TPS72748YFFT require an input capacitor for stability?

The TPS72748YFFT does not require an input capacitor for basic stability, but TI recommends a 0.1–1.0 µF ceramic capacitor between IN and GND to improve transient response, noise rejection, and ripple suppression - especially when the device is located far from the power source or subjected to fast load steps. This capacitor mitigates source impedance effects and enhances PSRR performance without impacting startup behavior or regulation accuracy.

How does the enable pin (EN) function on the TPS72748YFFT?

The EN pin on the TPS72748YFFT is an active-high logic input: driving it to ≥0.9 V enables regulation, while pulling it to ≤0.4 V places the device in shutdown mode, reducing ground current to 120 nA nominal. The pin draws only 40–500 nA, allowing direct interfacing with GPIOs or low-power microcontrollers. For always-on operation, EN may be tied to IN; no external pull-up is required due to internal biasing.

Can the TPS72748YFFT operate with a 1.0-µF output capacitor made of standard X5R ceramic dielectric?

Yes, the TPS72748YFFT is explicitly characterized and guaranteed stable with a 1.0-µF X5R or X7R ceramic capacitor on the OUT pin. These dielectrics provide low ESR (<200 mΩ) and minimal capacitance shift over temperature - meeting TI's stability requirements without needing tantalum or electrolytic alternatives. Using Y5V or NP0 ceramics is not recommended due to insufficient effective capacitance under DC bias or temperature variation.

What thermal protection behavior does the TPS72748YFFT exhibit under overload?

The TPS72748YFFT activates thermal shutdown at approximately +160°C junction temperature and resets at +140°C, creating hysteresis to prevent oscillation. During sustained overload, it cycles between current-limited conduction and shutdown - dissipating (VIN – VOUT) × ILIMIT until cooling occurs. Continuous cycling degrades reliability; design must ensure worst-case junction temperature remains ≤+125°C using PCB copper area, ambient derating, and appropriate load management - verified via thermal simulation or empirical testing.