Texas Instruments TLV713185PDQNT

Overview

TLV713185PDQNT 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, and 50-µA quiescent current. It operates from 1.4 V to 5.5 V input and delivers stable power to ultra-low-power microcontrollers and RF transceivers in space-constrained portable devices.

For engineers reviewing the TLV713185PDQNT datasheet, TLV713185PDQNT pinout, TLV713185PDQNT application, or TLV713185PDQNT equivalent, key selection criteria include foldback current limiting for short-circuit robustness, active output discharge capability (P-version), capacitor-free stability, and X2SON package thermal performance in battery-powered systems.

Technical Context

The TLV713185PDQNT implements an NMOS pass transistor architecture enabling ultra-low dropout and fast line/load transient response. Its internal foldback current limit reduces output current during overloads to minimize power dissipation and thermal stress.

It features an enable pin with 0.9-V turn-on threshold and 0.4-V shutdown threshold, integrated thermal shutdown at 158°C, and stable operation without output capacitance-eliminating board area and BOM cost while maintaining PSRR of 65 dB at 1 kHz.

Key Specifications

Pinout & Package

TLV713185PDQNT is housed in a 1.00 mm × 1.00 mm, 4-pin X2SON (DQN) package with exposed thermal pad electrically connected to GND. The compact footprint and low thermal resistance (R_θJA = 255.8°C/W) support high-density PCB 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 TLS850F2EJXUMA1 and MCP1703T-1802E/MB, TLV713185PDQNT uniquely balances capacitor-free operation, foldback current limiting, and active discharge in a 1-mm² package-making it optimal for space- and safety-constrained portable electronics where reliability and miniaturization are co-priorities.

Availability

TLV713185PDQNT is available at Aetrix Electronics and suitable for wireless earbuds, medical wearables, and industrial handheld scanners requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TLV713185PDQNT 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 and precision analog solutions.

The TLV713 series was designed specifically for portable, battery-powered devices requiring ultra-low quiescent current, small solution size, and robust fault protection-targeting applications from wearables to handheld instrumentation.

FAQ

What is the maximum input voltage rating for TLV713185PDQNT?

The absolute maximum input voltage for TLV713185PDQNT is 6 V, but the recommended operating range is 1.4 V to 5.5 V. Exceeding 6 V may cause permanent damage. For reliable operation in Li-ion battery applications, the device supports up to 4.2 V fully charged cells without derating. TLV713185PDQNT includes internal overvoltage protection that clamps input transients above 6.3 V.

Does TLV713185PDQNT require an output capacitor to remain stable?

No, TLV713185PDQNT is explicitly designed for capacitor-free operation and remains stable with zero output capacitance. This feature eliminates the need for external C_OUT, reducing BOM count and PCB area. However, adding a 1-µF ceramic capacitor improves transient response and is recommended for loads with fast current steps. TLV713185PDQNT also remains stable with any value of C_OUT from 0 to 100 µF.

What is the purpose of the active output discharge function in TLV713185PDQNT?

The active output discharge in TLV713185PDQNT uses an internal 120-Ω pulldown resistor to rapidly discharge the output node when the EN pin is driven low. This prevents floating voltages that could cause unintended behavior in downstream logic or analog circuits during power-down sequencing. TLV713185PDQNT achieves full discharge within 100 µs for a 1-µF load, ensuring deterministic system-level power states.

How does the foldback current limit protect TLV713185PDQNT during short-circuit events?

During a short circuit, TLV713185PDQNT reduces its output current from 150 mA to approximately 40 mA as V_OUT collapses toward 0 V. This foldback behavior limits power dissipation (P = V × I) and prevents thermal runaway. Unlike constant-current limiters, this feature keeps junction temperature below 158°C shutdown threshold even under sustained shorts. TLV713185PDQNT resumes normal regulation automatically once the fault is removed.

Can TLV713185PDQNT be used with a 1.2-V input supply?

No, TLV713185PDQNT requires a minimum input voltage of 1.4 V to maintain regulation at 1.85 V output. At 1.2 V input, the device cannot achieve dropout headroom and will drop out of regulation, causing V_OUT to track VIN minus internal losses. For 1.2-V input applications, consider lower-V_OUT variants such as TLV71312PDQNT (1.2 V output) or alternative regulators with sub-1.4-V input capability. TLV713185PDQNT is specified only for VIN ≥1.4 V.