Texas Instruments TLV70731DQNR

Overview

TLV70731DQNR from Texas Instruments is a 200-mA, low-quiescent-current (25 µA), low-noise LDO regulator with 0.5% output accuracy and fixed 3.1-V output voltage, housed in a 1-mm × 1-mm DQN (X2SON-4) package. It delivers high PSRR (70 dB at 100 Hz, 50 dB at 1 MHz), supports ultra-low 0.1-µF output capacitance, and integrates thermal shutdown and overcurrent protection - ideal for space-constrained portable RF power rails.

For engineers reviewing the TLV70731DQNR datasheet, TLV70731DQNR pinout, TLV70731DQNR application, or TLV70731DQNR equivalent, key selection criteria include dropout voltage at 150 mA (220–270 mV for 3.1 V), EN pin logic thresholds (VIH = 0.9 V, VIL = 0.4 V), shutdown current (1 µA), and stability with bias-derated ceramic capacitors in wearable and handheld designs.

Technical Context

The TLV70731DQNR uses a PMOS pass transistor architecture enabling low dropout and reverse-voltage tolerance via its intrinsic body diode. Its enable circuitry operates with TTL/CMOS-compatible thresholds, allowing direct interfacing with low-voltage GPIOs without level-shifting.

It achieves stable regulation with no load and maintains ±1.5% DC accuracy across –40°C to +125°C junction temperature. The device's 45 µV_RMS output noise (100 Hz–100 kHz) and fast 100-µs startup time support sensitive analog and RF subsystems requiring clean, responsive local power.

Key Specifications

Pinout & Package

TLV70731DQNR is packaged in a 1-mm × 1-mm DQN (X2SON-4) thermally enhanced leadless package with wettable flanks, optimized for automated optical inspection and high-density portable layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F0TESK and MCP1700T-3102E/MB, TLV70731DQNR offers the optimal balance of miniature size (1 mm²), integrated enable logic, full protection suite, and RF-grade noise performance - making it preferred for consumer portable electronics where board area and transient immunity are critical.

Availability

TLV70731DQNR is available at Aetrix Electronics and suitable for smartphone subsystem power, wearable sensor hubs, wireless gaming peripherals, and set-top box HDMI audio processors requiring stable component supply, rapid prototyping support, and long-term production continuity.

Supply support for TLV70731DQNR 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 delivering analog and embedded processing solutions, with core expertise in power management, signal chain, and connectivity technologies.

The TLV707 series was engineered specifically for portable RF and battery-powered applications demanding ultra-small footprint, low IQ, and high PSRR - targeting smartphones, wearables, and wireless peripherals where every micron and microamp matters.

FAQ

What is the minimum input voltage required for TLV70731DQNR to regulate 3.1 V at 150 mA?

The TLV70731DQNR requires a minimum input voltage of 3.32 V to maintain regulation at 150 mA, based on its maximum dropout voltage of 270 mV (3.1 V + 0.27 V). This allows operation from partially discharged single-cell Li-ion sources (≥3.3 V) without brownout.

Does TLV70731DQNR require an external pull-up resistor on the EN pin?

No, TLV70731DQNR does not require an external pull-up on EN. Its internal pull-up ensures default-enable behavior when EN is left floating. However, for deterministic startup in noisy environments, TI recommends tying EN to IN via a 100-kΩ resistor or driving it actively from a GPIO.

Can TLV70731DQNR be used with a 0.1-µF X5R capacitor rated at 6.3 V?

Yes, TLV70731DQNR is stable with a 0.1-µF X5R capacitor rated at 6.3 V. At 3.1-V bias and room temperature, such a capacitor typically retains >0.08 µF effective capacitance - meeting the device's 0.1-µF minimum requirement and ensuring loop stability per TI's characterization.

Is TLV70731DQNR pin-compatible with other devices in the TLV707 family?

Yes, all TLV707 and TLV707P variants in the DQN (X2SON-4) package share identical pinout (IN, GND, EN, OUT), including TLV70731DQNR. Voltage variants (e.g., TLV70712DQNR, TLV70728DQNR) and P-version pulldown variants (e.g., TLV70731PDQNR) are mechanically and electrically pin-compatible.

What is the thermal resistance (R_θJA) of TLV70731DQNR in standard JEDEC PCB layout?

The TLV70731DQNR has a junction-to-ambient thermal resistance (R_θJA) of 208.1°C/W under standard JEDEC High-K test board conditions. With 250 mA load and 1.5 V dropout, this corresponds to ~120°C junction rise - confirming safe operation within its 125°C max T_J limit only with appropriate copper pour and thermal vias.