Texas Instruments TLV713185PDBVR

Overview

TLV713185PDBVR from Texas Instruments is a capacitor-free, 150-mA low-dropout linear regulator with fixed 1.85-V output, 230-mV dropout at 150 mA, ±1% DC accuracy over temperature, and active output discharge. It operates from 1.4 V to 5.5 V input and delivers stable power to ultra-low-power microcontrollers in space-constrained portable devices.

For engineers reviewing the TLV713185PDBVR datasheet, TLV713185PDBVR pinout, TLV713185PDBVR application, or TLV713185PDBVR equivalent, key selection criteria include dropout performance at full load, foldback current limiting for short-circuit robustness, active pulldown for fast output discharge, and stability without external capacitors in X2SON packaging.

Technical Context

The TLV713185PDBVR implements a PMOS pass transistor architecture enabling ultra-low dropout and capacitor-free operation. Its internal foldback current limit reduces thermal stress during output shorts, while the EN pin provides precise 0.9-V turn-on and 0.4-V shutdown thresholds.

Unlike traditional LDOs, it integrates an active pulldown circuit (enabled only in 'P' variants) that discharges the output node through a 120-Ω internal resistor when disabled-critical for preventing back-powering of downstream logic in battery-powered systems.

Key Specifications

Pinout & Package

TLV713185PDBVR uses the 4-pin X2SON (DQN) package: 1.00 mm × 1.00 mm body, 0.35-mm pitch, thermal pad connected to GND. This ultra-compact footprint targets high-density PCBs 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 TLV713185PDBVR, TPL713185PDQNR omits active discharge but matches all electrical specs and package, while MCP1711T-185I/OT trades capacitor-free operation and ultra-low IQ for higher current capability and wider input range (1.7–6.0 V), making it better suited for non-battery applications.

Availability

TLV713185PDBVR is available at Aetrix Electronics and suitable for wearable health sensors, BLE audio earbuds, and industrial wireless nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TLV713185PDBVR 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 specializing in analog and embedded processing technologies, with decades of LDO design expertise for portable and industrial applications.

The TLV713 series was engineered specifically for capacitor-free, low-I_Q power delivery in space- and energy-constrained portable electronics - emphasizing solution size reduction and battery longevity.

FAQ

What is the maximum input voltage rating for TLV713185PDBVR?

The absolute maximum input voltage for TLV713185PDBVR is 6 V, but the recommended operating range is 1.4 V to 5.5 V. Exceeding 5.5 V may trigger internal protection or cause permanent damage. The device maintains regulation across this full range, with dropout performance optimized above 2.08 V for its 1.85-V output. Always refer to Section 6.1 of the SBVS195F datasheet for stress ratings.

Does TLV713185PDBVR require an output capacitor to remain stable?

No, TLV713185PDBVR is explicitly designed for capacitor-free operation and remains stable with C_OUT = 0 µF. This is confirmed in the device description and Figure 18 of the SBVS195F datasheet. Adding a 1-µF ceramic capacitor improves load transient response but is optional - a key differentiator from most LDOs that mandate minimum output capacitance.

How does the active output discharge function work in TLV713185PDBVR?

When the EN pin is driven below 0.4 V, TLV713185PDBVR activates an internal 120-Ω pulldown resistor between OUT and GND. This discharges a 1-µF load to under 100 mV within 120 µs, preventing back-powering of downstream circuitry. This feature is exclusive to 'P'-suffix variants like TLV713185PDBVR and is documented in Section 6.5 (RPULLDOWN parameter) of the datasheet.

What is the thermal performance of TLV713185PDBVR in its X2SON package?

In the 1.00 mm × 1.00 mm X2SON (DQN) package, TLV713185PDBVR has a junction-to-board thermal resistance (R_θJB) of 208.2°C/W when the thermal pad is properly soldered to a 1-in² copper pour. At 150 mA and 230-mV dropout, power dissipation is 34.5 mW, resulting in ~7.2°C junction-to-board rise - well within safe limits for ambient temperatures up to 85°C.

Can TLV713185PDBVR be used with a 1.4-V input source?

Yes, TLV713185PDBVR supports input voltages as low as 1.4 V, but regulation to 1.85 V is only possible when VIN exceeds VOUT + V_DO. At 150 mA, V_DO is 230 mV minimum, so 1.4 V is insufficient. Minimum functional input is 2.08 V (1.85 V + 0.23 V). Below that, the device enters dropout and output voltage drops linearly with input - verified in Figure 4 of SBVS195F.