Texas Instruments TLV71730PDQNR

Overview

TLV71730PDQNR from Texas Instruments is a 150-mA, low-dropout linear regulator with 3.0-V fixed output, 215-mV dropout at full load, 0.5% typical output accuracy, and active pulldown for fast output discharge. It delivers stable regulation in portable electronics where low quiescent current (35 µA) and foldback current limiting (40 mA short-circuit limit) are critical for battery life and fault resilience.

For engineers reviewing the TLV71730PDQNR datasheet, TLV71730PDQNR pinout, TLV71730PDQNR application, or TLV71730PDQNR equivalent, key selection criteria include its 1-mm × 1-mm X2SON (DQN) package, stability with ≥0.1-µF ceramic output capacitance, 70-dB PSRR at 1 kHz, UVLO threshold of 1.6 V, and enable logic compatible with low-voltage GPIOs (EN high = >0.9 V).

Technical Context

The TLV71730PDQNR uses a PMOS pass transistor to achieve ultra-low dropout and supports foldback current limiting-reducing output current as V_OUT drops, limiting short-circuit power dissipation. Its internal bandgap reference and error amplifier maintain ±1.5% output accuracy across –40°C to +85°C junction temperature.

Functional modes include normal regulation (VIN > VOUT + VDO and EN > 0.9 V), dropout operation (VIN insufficient for regulation but EN active), and disabled state (EN < 0.4 V or VIN < 1.6 V UVLO), during which the 120-Ω active pulldown resistor discharges the output node.

Key Specifications

Pinout & Package

TLV71730PDQNR is housed in a 4-pin, 1.00 mm × 1.00 mm X2SON (DQN) package with an exposed thermal pad connected to GND for enhanced thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F3TLE and MCP1700T-3002E/MB, TLV71730PDQNR offers the optimal balance of ultra-small footprint (1 mm²), low dropout (215 mV), and enable-controlled fast discharge-making it ideal for consumer portable designs where board area and dynamic power sequencing are critical.

Availability

TLV71730PDQNR is available at Aetrix Electronics and suitable for smartphone baseband power, wearable sensor nodes, POS terminal display drivers, and Bluetooth LE audio modules requiring stable component supply, consistent parametric performance, and long-term production availability.

Supply support for TLV71730PDQNR 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 applications demanding ultra-low IQ, small size, and robust fault protection-including foldback current limiting and active output discharge.

FAQ

What is the minimum input voltage required for TLV71730PDQNR to regulate 3.0 V at 150 mA?

The TLV71730PDQNR requires a minimum input voltage of 3.215 V to maintain 3.0-V regulation at 150 mA, based on its 215-mV typical dropout voltage. Input voltage must also exceed the 1.6-V UVLO threshold; however, regulation only begins once VIN exceeds VOUT + VDO under load.

Does TLV71730PDQNR require an external pull-up resistor on the EN pin?

No, TLV71730PDQNR does not require an external pull-up on EN. The EN pin has no internal pull-up; it must be driven actively-either by a GPIO or tied to IN for always-on operation. Driving EN below 0.4 V disables the device and engages the 120-Ω active pulldown resistor on OUT.

Can TLV71730PDQNR operate stably with a 0.1-µF output capacitor?

Yes, TLV71730PDQNR is explicitly characterized for stability with an effective output capacitance of ≥0.1 µF. This refers to the capacitance value *under operating bias and temperature*, not the nominal rated value-so a 1-µF X5R/X7R ceramic is recommended to ensure ≥0.1 µF effective capacitance across voltage and temperature ranges.

What happens to the output of TLV71730PDQNR when the input voltage falls below 1.6 V?

When VIN falls below the 1.6-V UVLO rising threshold, TLV71730PDQNR enters disabled mode regardless of EN state. The pass transistor turns off, and the 120-Ω active pulldown resistor discharges the OUT pin to GND, preventing uncontrolled floating voltages during brownout conditions.

How does the foldback current limit in TLV71730PDQNR improve system reliability compared to a fixed current limit?

The foldback current limit in TLV71730PDQNR reduces output current as VOUT decreases during overload, lowering power dissipation [(VIN – VOUT) × ILIMIT] in the PMOS pass element. This mitigates thermal runaway during sustained shorts-unlike fixed limits-and enables safer auto-recovery once the fault clears, enhancing long-term reliability in portable end equipment.