Texas Instruments TPS72733YFFT

Overview

TPS72733YFFT from Texas Instruments is a 3.3-V fixed-output, 250-mA ultralow-quiescent-current LDO linear regulator in a 4-ball DSBGA (1.2 mm × 0.8 mm) package. It delivers 2% output accuracy over load, line, and temperature (–40°C to +125°C), features 7.9 µA quiescent current, 65 mV typical dropout at 100 mA, and 70 dB PSRR at 1 kHz - optimized for RF-sensitive portable power rails including Bluetooth® and Zigbee® transceivers.

For engineers reviewing the TPS72733YFFT datasheet, TPS72733YFFT pinout, TPS72733YFFT application, or TPS72733YFFT equivalent, key selection criteria include its wafer-level chip-scale packaging for space-constrained designs, factory-programmed output voltage eliminating external resistors, stable operation with 1.0-µF ceramic output capacitance, and fast ±50-mV load transient response under 200-mA step loading.

Technical Context

The TPS72733YFFT uses a PMOS pass transistor architecture enabling low dropout and high PSRR without requiring a noise-reduction capacitor. Its internal EEPROM sets the 3.3-V output during manufacturing, eliminating external feedback components and ensuring consistent regulation across production lots.

It integrates active enable control (EN pin threshold: 0.9 V high, 0.4 V low), thermal shutdown (+160°C trip), overcurrent protection (400 mA typical limit), and undervoltage lockout (1.90 V nominal UVLO). Ground pin current remains stable at 7.9 µA (I_OUT = 0 mA) and rises to 130 µA at 250 mA, supporting precise low-power budgeting.

Key Specifications

Pinout & Package

TPS72733YFFT is housed in a 4-ball, 0.4-mm pitch DSBGA (YFF) package measuring 1.20 mm × 0.80 mm. The top-side marking includes a dot indicating ball A1 location; GND is marked with a dot for 3.3-V variants per TI package outline documentation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A0233PDBVR and MCP1700T-3302E/TT, the TPS72733YFFT uniquely balances wafer-level miniaturization (1.2 mm × 0.8 mm), RF-grade PSRR (70 dB), integrated EN control, and full protection - making it the only option meeting simultaneous size, noise, and reliability requirements for next-gen wireless wearables.

Availability

TPS72733YFFT is available at Aetrix Electronics and suitable for wireless handsets, BLE sensor nodes, and portable medical devices requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.

Supply support for TPS72733YFFT 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 and embedded processing technologies, with decades of expertise in precision power management ICs.

The TPS727 family was designed specifically for ultra-small, battery-powered RF systems - delivering ultralow IQ, factory-set outputs, and wafer-level packaging to eliminate design compromises between size, efficiency, and noise performance.

FAQ

What is the maximum input voltage for the TPS72733YFFT?

The TPS72733YFFT supports an absolute maximum input voltage of +6.0 V, but its recommended operating range is 2.0 V to 5.5 V. Operation above 5.5 V risks permanent damage, while inputs below 2.0 V may trigger undervoltage lockout (UVLO) at 1.90 V nominal, preventing regulation until VIN exceeds this threshold. For reliable 3.3-V output, maintain VIN ≥ 3.365 V to stay above the 65-mV dropout margin at 100 mA.

Does the TPS72733YFFT require an input capacitor?

The TPS72733YFFT does not require an input capacitor for stability, but Texas Instruments strongly recommends a 0.1-µF to 1.0-µF ceramic capacitor between IN and GND. This improves transient response, reduces input ripple coupling, and mitigates noise from upstream switching regulators - especially critical in RF applications like Bluetooth® where supply noise degrades receiver sensitivity. Without it, PSRR and load-step performance degrade measurably.

How does the enable (EN) pin function on the TPS72733YFFT?

The EN pin on the TPS72733YFFT is active-high with a 0.9-V turn-on threshold and 0.4-V turn-off threshold. Driving EN ≥ 0.9 V enables regulation; pulling EN ≤ 0.4 V places the device in shutdown mode, reducing ground current to 120 nA nominal. If shutdown is unnecessary, EN can be tied directly to IN. The pin draws only 40–500 nA, enabling direct drive from low-power microcontroller GPIOs without level-shifting.

Can the TPS72733YFFT be used with a 1.0-µF output capacitor?

Yes - the TPS72733YFFT is explicitly characterized and guaranteed stable with a 1.0-µF ceramic output capacitor (X5R or X7R dielectric), unlike many older LDOs requiring larger or specialized capacitors. This enables minimal BOM count and compact layout. Using smaller capacitors (<0.82 µF) risks instability and excessive overshoot; larger values (>2.2 µF) improve transient response but extend startup time beyond the specified 100-µs maximum.

What thermal protection behavior does the TPS72733YFFT exhibit?

The TPS72733YFFT activates thermal shutdown at approximately +160°C junction temperature and resets at +140°C. During sustained overload, it cycles between regulation and shutdown - a protective behavior that prevents permanent damage but degrades reliability if repeated. For robust operation, design to keep T_J ≤ +125°C using the YFF package's 76 °C/W junction-to-board thermal resistance, adequate copper area, and conservative power dissipation limits.

Is the TPS72733YFFT pin-compatible with other TPS727xxYFF variants?

Yes - all TPS727xxYFF devices (e.g., TPS72718YFF, TPS72728YFFT) share identical 4-ball DSBGA-4 pinout (IN, EN, GND, OUT), identical package dimensions (1.2 mm × 0.8 mm), and identical ball pitch (0.4 mm). Only the factory-programmed output voltage differs; no PCB redesign is needed when substituting between 0.9-V to 5.0-V variants, provided input voltage and load requirements remain compatible.