Texas Instruments TLV70518YFMT

Overview

TLV70518YFMT from Texas Instruments is a 1.8-V fixed-output, 200-mA low-dropout (LDO) linear regulator in a 4-pin PicoStar™ package (0.77 mm × 0.77 mm, 0.15-mm max height), featuring 35 μA quiescent current, 0.5% output accuracy, and 145 mV dropout at 200 mA - designed for power-sensitive RF and portable applications such as Bluetooth® and Zigbee® devices.

For engineers reviewing the TLV70518YFMT datasheet, TLV70518YFMT pinout, TLV70518YFMT application, or TLV70518YFMT equivalent, key selection considerations include ultra-low profile packaging for space-constrained handheld PCBs, stability with only 0.1-μF ceramic output capacitance, high PSRR (70 dB at 1 kHz), thermal shutdown protection, and enable-controlled sequencing with 0.9-V turn-on threshold compatible with low-voltage GPIOs.

Technical Context

The TLV70518YFMT uses a PMOS pass transistor architecture to achieve low dropout and maintain regulation down to (VIN – VOUT) = 145 mV at full load. Its error amplifier delivers 0.5% typical DC accuracy across –40°C to +125°C and supports zero-load regulation.

It integrates undervoltage lockout (UVLO) triggering at 1.9 V, active-high enable logic with 0.4-V disable threshold, and internal current limiting (260–550 mA) coupled with thermal shutdown at 160°C. The device is stable with ≥0.1-μF effective ceramic output capacitance and achieves 70 dB PSRR at 1 kHz due to optimized internal compensation.

Key Specifications

Pinout & Package

TLV70518YFMT is housed in a 4-pin PicoStar™ package (YFM), measuring 0.77 mm × 0.77 mm with maximum height of 0.15 mm - optimized for ultra-thin mobile and wearables PCBs where Z-height is constrained.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPL72018PDQNR, TLV70518YFMT offers 15-μA lower IQ and 10-dB higher PSRR - critical for battery life and RF performance; versus MCP1826T-1802E/DB, it provides 110-mV lower dropout, integrated enable, and thermal protection in half the board area.

Availability

TLV70518YFMT is available at Aetrix Electronics and suitable for wireless handsets, Bluetooth® devices, and Zigbee® networks requiring stable component supply with consistent parametric performance across production lots.

Supply support for TLV70518YFMT 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 TLV705 series was engineered specifically for ultra-low-power, space-constrained portable applications - emphasizing minimal quiescent current, sub-millimeter packaging, and robust RF noise rejection in battery-operated handheld systems.

FAQ

What is the minimum input voltage required for stable operation of TLV70518YFMT?

The TLV70518YFMT requires a minimum input voltage of 2.0 V per its recommended operating conditions. With a 1.8-V output and 145-mV dropout at 200 mA, it maintains regulation down to VIN = 1.945 V under full load - but TI specifies 2.0 V as the absolute minimum to ensure guaranteed performance across temperature and process variation. Below 2.0 V, UVLO activates and disables regulation.

Can TLV70518YFMT operate without an enable signal connected?

Yes, TLV70518YFMT can operate without an external enable signal: connect the EN pin directly to VIN to force permanent enable. This configuration draws 35 μA quiescent current continuously and bypasses shutdown control. For systems requiring power sequencing or low-power sleep, however, a dedicated GPIO-driven EN signal is recommended to reduce system IQ to 1 μA in shutdown mode.

What output capacitor value is required for stability with TLV70518YFMT?

TLV70518YFMT is stable with a minimum effective output capacitance of 0.1 μF ceramic. TI recommends a 1-μF X5R/X7R ceramic capacitor (0402 or 0603) placed close to the VOUT and GND pins for optimal transient response and noise filtering. Larger values (e.g., 2.2 μF) improve load-step immunity but are not required for stability - enabling smaller PCB area and lower BOM cost than legacy LDOs.

Does TLV70518YFMT include reverse-voltage protection?

No, TLV70518YFMT does not include reverse-voltage protection. Its PMOS pass transistor has an inherent body diode that conducts when VOUT exceeds VIN, potentially damaging upstream sources or sinking uncontrolled current. If reverse voltage is possible (e.g., hot-swap, backup battery, or shared rail scenarios), TI recommends adding an external Schottky diode in series with VIN or a dedicated reverse-protection IC - especially since the body diode is not current-limited.

How does TLV70518YFMT handle thermal overload conditions?

TLV70518YFMT incorporates thermal shutdown protection that triggers at 160°C junction temperature and resets at 140°C (20°C hysteresis). During overload, it cycles between current-limit conduction and thermal shutdown - dissipating power until temperature drops below the reset threshold. This auto-recovery behavior prevents permanent damage but requires proper PCB thermal design (e.g., thermal vias to inner ground planes) to avoid sustained cycling in high-ambient environments.