Texas Instruments TLV713285PDQNT

Overview

TLV713285PDQNT from Texas Instruments is a capacitor-free, 150-mA, low-dropout linear regulator with fixed 2.85-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 power to ultra-low-power microcontrollers in portable battery-powered systems.

For engineers reviewing the TLV713285PDQNT datasheet, TLV713285PDQNT pinout, TLV713285PDQNT application, or TLV713285PDQNT equivalent, key selection considerations include capacitor-free stability, thermal shutdown at 158°C, active output discharge capability, 1.0 mm × 1.0 mm X2SON package, and compatibility with Li-ion, coin-cell, and multi-rail PMIC outputs.

Technical Context

The TLV713285PDQNT implements a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-current blocking. Its internal foldback current limit reduces power dissipation during overload by lowering output current as voltage drops below regulation - critical for battery safety in handheld devices.

It features an enable pin with 0.9 V turn-on threshold and 0.4 V shutdown threshold, integrated thermal shutdown (158°C trip, 140°C reset), and active pulldown circuitry (enabled in 'P' variant) that discharges the output when disabled - eliminating external bleed resistors in space-constrained designs.

Key Specifications

Pinout & Package

TLV713285PDQNT uses the 1.0 mm × 1.0 mm, 4-pin X2SON (DQN) package with exposed thermal pad electrically tied to GND. The compact footprint supports high-density portable PCB layouts and enables direct thermal coupling to ground planes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F2BHTSA1 and MCP1700T-2802E/TT, TLV713285PDQNT uniquely balances capacitor-free operation, 150 mA capability, active discharge, and 1-mm² footprint - making it optimal for consumer portables where size, simplicity, and controlled shutdown are prioritized over automotive qualification or nanoamp IQ.

Availability

TLV713285PDQNT is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth LE sensor nodes, industrial handheld scanners, and portable medical glucometers requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for TLV713285PDQNT 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, personal electronics, and communications markets.

The TLV713 series was designed specifically for portable, battery-powered devices requiring ultra-small footprint, capacitor-free stability, and intelligent fault protection - targeting PDAs, MP3 players, WLAN cards, and modern wearables.

FAQ

What is the minimum input voltage required for TLV713285PDQNT to regulate 2.85 V at 150 mA?

The TLV713285PDQNT requires a minimum input voltage of 3.08 V to maintain regulation at 150 mA, calculated from its 230 mV dropout voltage (2.85 V + 0.23 V). This allows reliable operation from partially discharged Li-ion cells (3.2 V–3.4 V) and regulated 3.3 V rails with margin. Input voltage must remain ≥1.4 V for basic functionality, but regulation is only guaranteed above the dropout threshold.

Does TLV713285PDQNT require external capacitors to operate stably?

No, TLV713285PDQNT is explicitly designed for stable operation with zero output capacitance - a core feature confirmed in TI's SBVS195F datasheet. While optional 1-µF ceramic capacitors on IN and OUT improve EMI immunity and transient response, they are not required for loop stability. This eliminates capacitor aging, leakage, and board space concerns in long-life portable designs.

How does the foldback current limit in TLV713285PDQNT protect the system during a short circuit?

During output short-circuit, TLV713285PDQNT reduces output current as output voltage collapses - e.g., from 150 mA at 2.85 V to ~40 mA near 0 V. This foldback behavior limits power dissipation (P = V × I) and prevents thermal runaway. Unlike constant-current limiters, it inherently lowers junction temperature rise, allowing safe indefinite short-circuit operation without thermal shutdown cycling.

What is the purpose of the active output discharge function in TLV713285PDQNT?

The active output discharge in TLV713285PDQNT uses an internal 120 Ω pulldown switch (enabled when EN = low) to rapidly drain stored charge from output capacitors. This prevents floating or slowly decaying voltages that could cause downstream ICs to latch up or behave unpredictably during power sequencing - eliminating the need for external bleed resistors in space-constrained designs like hearing aids and smart patches.

Can TLV713285PDQNT be used with a 1.8 V input supply?

No, TLV713285PDQNT cannot regulate 2.85 V from a 1.8 V input because 1.8 V is below its minimum recommended input voltage of 1.4 V *and* insufficient to overcome the 230 mV dropout requirement (2.85 V + 0.23 V = 3.08 V). At 1.8 V input, the device enters dropout, delivering unregulated, input-following output. It is only functional as a regulator when VIN ≥ VOUT + VDO - i.e., ≥3.08 V at full load.