Texas Instruments TLV713185PDQNR

Overview

TLV713185PDQNR 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 foldback overcurrent protection. It operates from 1.4 V to 5.5 V input and delivers stable regulation in space-constrained portable power rails such as Bluetooth earbud battery management.

For engineers reviewing the TLV713185PDQNR datasheet, TLV713185PDQNR pinout, TLV713185PDQNR application, or TLV713185PDQNR equivalent, key selection considerations include capacitor-free stability, thermal shutdown at 158°C, active output discharge (enabled by P-suffix), EN logic thresholds (0.9 V high / 0.4 V low), and X2SON-4 package compatibility with high-density PCB layouts.

Technical Context

The TLV713185PDQNR implements an internal PMOS pass transistor with foldback current limiting that reduces output current to ~40 mA under short-circuit conditions-preventing thermal runaway during fault events. Its capacitor-free architecture eliminates mandatory output capacitance while maintaining stability across all load and temperature conditions (–40°C to 125°C).

It features undervoltage lockout (UVLO) with hysteresis, inrush current control during EN assertion, and a dedicated enable pin with rail-to-rail compatible logic thresholds. The device does not include an internal pull-down on EN; external biasing is required unless using the P-version's active pulldown resistor (120 Ω), which is present in TLV713185PDQNR.

Key Specifications

Pinout & Package

TLV713185PDQNR uses the 1.00 mm × 1.00 mm, 4-pin X2SON (DQN) package with wettable flank terminations. The thermal pad is electrically connected to GND and must be soldered to a PCB ground plane for thermal compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV713185PDQNT, TLV713185PDQNR adds active discharge for faster turn-off control; compared with TPS7A05185PDQNR, it trades 25 µA lower I_Q and 10 dB higher PSRR for guaranteed capacitor-free operation and simpler layout.

Availability

TLV713185PDQNR is available at Aetrix Electronics and suitable for wireless earbuds, medical patch monitors, and industrial sensor nodes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for TLV713185PDQNR 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, signal chain, and high-reliability ICs.

The TLV713 series was designed specifically for portable, battery-powered devices requiring ultra-small footprint, low quiescent current, and robust fault protection - targeting wearables, hearing aids, and IoT edge nodes.

FAQ

What is the maximum input voltage rating for TLV713185PDQNR?

The absolute maximum input voltage for TLV713185PDQNR is 6 V, but the recommended operating range is 1.4 V to 5.5 V. Exceeding 6 V risks permanent damage per JEDEC stress ratings. For reliable operation in battery-powered systems, VIN should remain below 5.5 V - for example, when used with a fully charged 2-cell Li-ion (8.4 V), a pre-regulator stage is required before TLV713185PDQNR.

Does TLV713185PDQNR require an output capacitor to operate stably?

No, TLV713185PDQNR is explicitly designed for capacitor-free operation and remains stable with zero output capacitance across all load and temperature conditions. While optional, adding a 1-µF ceramic capacitor improves transient response for dynamic loads like RF transceivers. This capability eliminates C_OUT from the BOM and reduces solution size - a key advantage in space-constrained designs such as hearing aids and smart patches.

How does the foldback current limit function in TLV713185PDQNR?

In TLV713185PDQNR, foldback current limiting reduces output current from 150 mA to approximately 40 mA when the output is shorted or heavily overloaded. This behavior lowers power dissipation during fault conditions, preventing thermal shutdown cycling and enabling safe auto-recovery once the fault is removed. The feature is intrinsic to the IC's internal current-sense architecture and requires no external components - critical for protecting battery cells and PCB traces in portable devices.

What is the purpose of the active output discharge in TLV713185PDQNR?

The active output discharge in TLV713185PDQNR uses an internal 120-Ω pulldown switch between OUT and GND, activated automatically when EN is driven low. This rapidly discharges residual voltage on the output node - typically within tens of microseconds - preventing unintended biasing of downstream circuitry (e.g., I/O pins of powered-down MCUs). It eliminates the need for external bleed resistors and ensures deterministic power sequencing in multi-rail systems.

Can TLV713185PDQNR be used with a 1.8-V microcontroller GPIO to control EN?

Yes, TLV713185PDQNR is fully compatible with 1.8-V GPIO: its EN pin has a guaranteed high threshold of 0.9 V (min) and low threshold of 0.4 V (max), providing >0.9 V noise margin above V_IL and >1.4 V margin below V_IH for standard 1.8-V logic. No level shifter is needed. Additionally, the EN pin draws only 0.01 µA, minimizing loading on the driving GPIO - making TLV713185PDQNR ideal for direct interfacing with low-power MCUs in battery-operated applications.