Texas Instruments TLV713185PDBVT

Overview

TLV713185PDBVT from Texas Instruments is a capacitor-free, 150-mA, low-dropout linear regulator with fixed 1.85-V output, 1% accuracy, 230-mV dropout at 150 mA, 50-µA quiescent current, and active output discharge. It operates from 1.4 V to 5.5 V input and delivers stable power to ultra-low-power microcontrollers and RF modules in space-constrained portable devices.

For engineers reviewing the TLV713185PDBVT datasheet, TLV713185PDBVT pinout, TLV713185PDBVT application, or TLV713185PDBVT equivalent, key selection criteria include dropout performance at full load, foldback current limiting for short-circuit robustness, active pulldown for fast output discharge, capacitor-free stability, and thermal behavior in 1-mm × 1-mm X2SON packaging.

Technical Context

The TLV713185PDBVT implements a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-current blocking. Its internal foldback current limit reduces thermal stress during overloads by lowering output current as voltage collapses - critical for battery-powered systems where sustained short-circuit events must not drain cells or damage PCB traces.

Unlike traditional LDOs, it achieves stability without mandatory output capacitance due to an integrated compensation scheme, while remaining compatible with any ceramic COUT (0.1–100 µF). The P-suffix variant adds an internal 120-Ω pulldown resistor between OUT and GND, enabling rapid discharge of downstream capacitive loads upon shutdown.

Key Specifications

Pinout & Package

TLV713185PDBVT is housed in a 4-pin, 1.00 mm × 1.00 mm X2SON package with wettable flanks and an exposed thermal pad electrically tied to GND. The compact footprint supports high-density layouts in wearables and hearing aids.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F0TESK and MCP1700T-1802E/TT, TLV713185PDBVT offers the smallest solution size, lowest dropout, and fastest output discharge - making it optimal for space- and energy-constrained portable electronics where reliability under transient overload is essential.

Availability

TLV713185PDBVT is available at Aetrix Electronics and suitable for wearable health monitors, BLE peripheral nodes, industrial sensor transmitters, and audio codec power rails requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for TLV713185PDBVT 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 specializing in analog and embedded processing technologies, with leadership in power management ICs, precision amplifiers, and high-reliability interface solutions.

The TLV713 series targets portable, battery-powered applications demanding ultra-low IQ, capacitor-free operation, and robust fault handling - delivering optimized power integrity for next-generation wearables, IoT endpoints, and miniaturized industrial sensors.

FAQ

What is the maximum input voltage rating for TLV713185PDBVT?

The absolute maximum input voltage for TLV713185PDBVT is 6 V, but recommended operating conditions specify 1.4 V to 5.5 V. Exceeding 5.5 V risks permanent damage per Absolute Maximum Ratings. The device's internal protection circuits do not guard against overvoltage beyond this limit, so proper upstream voltage clamping or regulation is required in systems where input transients may occur.

Does TLV713185PDBVT require an output capacitor to remain stable?

No, TLV713185PDBVT is designed for capacitor-free stability and operates reliably with zero output capacitance. This eliminates BOM cost and board area while avoiding aging or microphonic effects associated with ceramic capacitors. However, adding a 0.1–100 µF ceramic COUT improves transient response and further reduces output noise - especially beneficial in audio or precision analog applications.

How does the foldback current limit function in TLV713185PDBVT during a short-circuit event?

In TLV713185PDBVT, foldback current limiting reduces output current as output voltage drops below regulation - e.g., from 150 mA at 1.85 V to ~40 mA near 0 V. This lowers power dissipation in the pass element during sustained shorts, preventing thermal shutdown and preserving battery charge. Unlike constant-current limiters, foldback avoids overheating in handheld devices where enclosure airflow is limited.

What is the purpose of the active output discharge feature in TLV713185PDBVT?

The active output discharge in TLV713185PDBVT uses an internal 120-Ω pulldown resistor between OUT and GND, activated when EN is low. It discharges downstream capacitance (e.g., 1 µF) to <100 mV within 120 µs, ensuring predictable power-down sequencing and eliminating floating outputs that could cause latch-up or false wake-up in connected logic. This feature is exclusive to P-suffix variants like TLV713185PDBVT.

Can TLV713185PDBVT operate with a 1.4-V input while delivering 1.85-V output?

No - TLV713185PDBVT cannot regulate 1.85 V from a 1.4-V input because the minimum input must exceed the output voltage plus dropout. With 230-mV dropout at full load, the minimum valid input is 2.085 V. At light loads, dropout decreases, but even at 1 mA, dropout remains >70 mV; thus, 1.4 V is below the functional input range and will result in unregulated or zero output.