Texas Instruments TPS72718YFFT

Overview

TPS72718YFFT from Texas Instruments is a 1.8-V fixed-output, 250-mA ultralow-I_Q LDO linear regulator in a 4-ball DSBGA package (1.2 mm × 0.8 mm), featuring 65 mV dropout at 100 mA, 2% output accuracy over load/line/temperature, and 7.9 µA quiescent current - designed for RF-sensitive battery-powered applications such as Bluetooth® transceivers and smartphone baseband ICs.

For engineers reviewing the TPS72718YFFT datasheet, TPS72718YFFT pinout, TPS72718YFFT application, or TPS72718YFFT equivalent, key selection criteria include its 1.8-V factory-programmed output, 70 dB PSRR at 1 kHz, ±50 mV load transient response at 200 mA step, stability with 1.0-µF ceramic output capacitor, and thermal shutdown at +160°C.

Technical Context

The TPS72718YFFT uses a PMOS pass transistor to achieve low dropout and high PSRR, with internal EEPROM programming fixing the 1.8-V output without external resistors. Its bandgap reference and error amplifier deliver 2% DC accuracy across –40°C to +125°C junction temperature.

Functional modes are controlled by an active-high EN pin (0.9 V threshold), enabling shutdown current of 120 nA. The device integrates undervoltage lockout (UVLO at 1.90 V), current limiting (typ. 400 mA), and thermal protection that cycles between +140°C (restart) and +160°C (shutdown).

Key Specifications

Pinout & Package

TPS72718YFFT 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 1.8-V variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS72718DSE, TPS72718YFFT offers 20% lower thermal resistance and 35% smaller footprint - critical for ultra-thin mobile modules. Versus TPS7A0218PDBVR, it delivers 50 mA more output current and supports 1.0-µF stability, trading ultra-low I_Q for higher drive capability and simpler design.

Availability

TPS72718YFFT is available at Aetrix Electronics and suitable for wireless handsets, Bluetooth® peripherals, and portable consumer electronics requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.

Supply support for TPS72718YFFT 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TPS727 family was engineered specifically for RF-sensitive, battery-constrained portable devices - prioritizing ultralow quiescent current, fast transient response, and minimal board area without sacrificing accuracy or protection features.

FAQ

What is the maximum input voltage rating for the TPS72718YFFT?

The TPS72718YFFT has an absolute maximum input voltage (VIN) rating of +6.0 V. However, the recommended operating range is 2.0 V to 5.5 V. Exceeding 6.0 V risks permanent damage per the Absolute Maximum Ratings table. For reliable operation, maintain VIN ≤5.5 V and ensure sufficient headroom above 1.8 V to meet dropout requirements - e.g., ≥2.0 V input for 100 mA load given 65 mV typical dropout.

Does the TPS72718YFFT require an input capacitor for stability?

The TPS72718YFFT does not require an input capacitor for basic stability, but TI strongly recommends a 0.1–1.0 µF ceramic capacitor between IN and GND. This improves transient response, reduces noise coupling from upstream sources, and mitigates effects of high source impedance. In designs with fast load steps or non-ideal power distribution networks, omitting the input capacitor may degrade PSRR and increase output voltage deviation during line transients.

How does the enable pin (EN) function on the TPS72718YFFT?

The EN pin on the TPS72718YFFT is an active-high digital control input. Driving EN ≥0.9 V enables regulation; driving EN ≤0.4 V places the device in shutdown mode with 120 nA typical ground current. The pin accepts standard TTL/CMOS logic levels and draws only 40–500 nA. If shutdown is unused, EN may be tied directly to IN - ensuring always-on operation without additional pull-up components.

Can the TPS72718YFFT be used with a 1.0-µF output capacitor?

Yes, the TPS72718YFFT is explicitly characterized and guaranteed stable with a 1.0-µF or larger X5R/X7R ceramic output capacitor. This is a key design advantage over many older LDOs requiring ≥2.2 µF or specific ESR ranges. Using a 1.0-µF capacitor minimizes board area and cost while maintaining ±50 mV load transient response and adequate phase margin across –40°C to +125°C.

What thermal protection behavior does the TPS72718YFFT exhibit under overload?

The TPS72718YFFT activates thermal shutdown at approximately +160°C junction temperature and resumes operation once the die cools to +140°C - providing 20°C hysteresis. Under sustained overload, this causes cycling between regulation and shutdown. While protective, repeated cycling degrades reliability. Designers must ensure worst-case power dissipation (e.g., (VIN − 1.8 V) × I_LOAD) stays within limits defined by R_θJA = 160°C/W and ambient temperature to avoid entering this mode during normal operation.