Texas Instruments TLV71736PDQNT

Overview

TLV71736PDQNT from Texas Instruments is a 150-mA, low-dropout linear regulator with active output discharge, fixed 3.6-V output, 215-mV dropout at full load, 0.5% typical accuracy, and 35-µA quiescent current-designed for power-sensitive portable electronics requiring stable low-noise supply under light-to-moderate load.

For engineers reviewing the TLV71736PDQNT datasheet, TLV71736PDQNT pinout, TLV71736PDQNT application, or TLV71736PDQNT equivalent, key selection considerations include foldback current limiting (40-mA short-circuit limit), 1-mm × 1-mm X2SON package thermal performance (R_θJA = 393.3°C/W), PSRR of 70 dB at 1 kHz, and compatibility with 0.1-µF minimum ceramic output capacitance.

Technical Context

The TLV71736PDQNT uses a PMOS pass transistor to achieve low dropout and integrates an active pulldown circuit that discharges the output during shutdown. Its foldback current limit initiates near 350 mA and reduces short-circuit current to 40 mA, minimizing power dissipation in fault conditions.

It features undervoltage lockout (UVLO) at 1.6 V, active-high enable with 0.9-V turn-on threshold, and operates across –40°C to +85°C junction temperature. Stability is guaranteed with ≥0.1-µF effective output capacitance, enabling use of small-footprint, bias-voltage-derated ceramics.

Key Specifications

Pinout & Package

TLV71736PDQNT is housed in a 1.00 mm × 1.00 mm, 4-pin X2SON (DQN) package with exposed thermal pad connected to GND for enhanced thermal performance. The package is RoHS-compliant and moisture-sensitivity level (MSL) 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F0TESK and AP7361D-36SG-7, TLV71736PDQNT offers the smallest footprint, lowest quiescent current, and integrated active discharge-making it optimal for space- and battery-constrained portable designs where precise 3.6-V regulation and fast shutdown behavior are essential.

Availability

TLV71736PDQNT is available at Aetrix Electronics and suitable for smartphone power management, wearable sensor hubs, industrial handheld terminals, and point-of-sale peripherals requiring stable component supply with consistent parametric performance and long-term manufacturability.

Supply support for TLV71736PDQNT 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 TLV717P series was designed specifically for portable, battery-powered devices demanding ultra-low quiescent current, small size, and robust fault protection-including foldback current limiting and active output discharge.

FAQ

What is the minimum input voltage required for TLV71736PDQNT to regulate 3.6 V at 150 mA?

The TLV71736PDQNT requires a minimum input voltage of 3.815 V to maintain regulation at 150 mA, based on its 215-mV typical dropout voltage (3.6 V + 0.215 V). Operation below this voltage places the device in dropout mode, where output voltage tracks input minus dropout-reducing PSRR and transient response performance.

Does TLV71736PDQNT require an external output capacitor, and what value is recommended?

Yes, TLV71736PDQNT requires an external output capacitor for stability. It is stable with ≥0.1-µF effective capacitance (after bias and temperature derating), but Texas Instruments recommends a 1-µF X5R/X7R ceramic capacitor for robust performance across operating conditions. Lower values may compromise transient response and noise suppression.

How does the foldback current limit in TLV71736PDQNT improve system reliability compared to a fixed current limit?

The foldback current limit in TLV71736PDQNT reduces output current as output voltage drops-e.g., during a short circuit-limiting short-circuit current to ~40 mA. This cuts power dissipation [(V_IN – V_OUT) × I_LIMIT] significantly versus a fixed 150-mA limit, preventing thermal runaway and enabling safe, sustained fault operation without external current-limiting components.

Can TLV71736PDQNT be used with a 1.8-V GPIO to control the EN pin?

Yes, TLV71736PDQNT can be enabled using a 1.8-V GPIO because its enable threshold is specified at 0.9 V (min) for activation and 0.4 V (max) for disable. A 1.8-V logic high exceeds the 0.9-V requirement with margin, making it compatible with modern low-voltage microcontrollers and application processors without level-shifting.

What is the purpose of the active pulldown circuit in TLV71736PDQNT, and how does it affect system behavior?

The active pulldown circuit in TLV71736PDQNT integrates a 120-Ω resistor between OUT and GND during shutdown, rapidly discharging output capacitance. This prevents floating voltages, avoids unintended wake-up of downstream circuits, and ensures predictable power-down sequencing-critical in multi-rail systems where uncontrolled node discharge could cause latch-up or data corruption.