Texas Instruments TPS71319DRCT

Overview

TPS71319DRCT from Texas Instruments is a dual-output, ultra-low-noise, high-PSRR low-dropout linear regulator with integrated supply voltage supervisor (SVS) monitoring OUT2. It delivers 250 mA per channel, features 32 µV_rms output noise (with 0.01 µF NR capacitor), 65 dB PSRR at 10 kHz, and 125 mV typical dropout at 250 mA - optimized for RF and noise-sensitive analog circuits in portable wireless systems.

For engineers reviewing the TPS71319DRCT datasheet, TPS71319DRCT pinout, TPS71319DRCT application, or TPS71319DRCT equivalent, key selection criteria include dual independent enable control, SVS reset delay (50–200 ms), thermal shutdown (+160°C), and stable operation with 2.2 µF ceramic output capacitors - all in a thermally enhanced 3 mm × 3 mm SON-10 package.

Technical Context

The TPS71319DRCT integrates two independent PMOS-based LDOs sharing a common input but with separate EN1/EN2, OUT1/OUT2, and feedback paths. Channel 1 is fixed at 1.8 V; Channel 2 is adjustable via FB2 (1.225 V internal reference), supporting outputs from 1.2 V to 5.5 V. Each LDO uses active pull-down for fast load transient recovery and achieves <60 µs startup with 0.001 µF NR capacitor.

Its integrated SVS monitors only OUT2 voltage, asserting open-drain RESET when VOUT2 falls below 95% of nominal (±2.5% threshold accuracy, 0.5% hysteresis). The NR pin connects to an internal 250 kΩ resistor tied to the bandgap reference, enabling programmable noise filtering - critical for preserving SNR in RF front-ends and high-resolution ADC/DAC supplies.

Key Specifications

Pinout & Package

TPS71319DRCT is housed in a thermally enhanced 3 mm × 3 mm × 1 mm VSON-10 (DRC) package with exposed thermal pad (Pin 5/PAD = GND). The package supports high-power-density PCB layouts and achieves R_θJA = 52°C/W on JEDEC High-K board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS71319DRCT, TPS71334DRCT offers identical form-factor and feature set but targets 3.3 V–adjustable systems, while TPS7A8300RGRT trades dual output and SVS for higher current and lower noise in single-rail applications - neither is pin-compatible, but both serve adjacent design requirements in TI's low-noise LDO portfolio.

Availability

TPS71319DRCT is available at Aetrix Electronics and suitable for cellular modems, wireless LAN modules, digital camera sensor subsystems, and FPGA-based industrial vision systems requiring stable component supply across extended temperature ranges (-40°C to +125°C).

Supply support for TPS71319DRCT 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, embedded processing, and power management technologies with over 50 years of innovation in high-reliability, high-performance ICs.

The TPS713xx family was designed specifically for noise-critical RF and portable wireless applications - delivering dual ultra-low-noise LDOs with integrated supervision in miniature thermally enhanced packages.

FAQ

What is the output voltage configuration of the TPS71319DRCT?

The TPS71319DRCT features a fixed 1.8 V output on OUT1 and an adjustable output on OUT2, set via an external resistor divider connected to the FB2 pin. The internal reference is 1.225 V, enabling OUT2 voltages from 1.2 V to 5.5 V. This dual configuration supports systems requiring a stable digital core rail and a programmable analog/RF supply - such as baseband processors paired with tunable RF transceivers. The TPS71319DRCT does not support fixed/fixed or adjustable/adjustable variants.

Does the TPS71319DRCT require external capacitors, and what values are recommended?

Yes, the TPS71319DRCT requires a 0.1 µF ceramic input capacitor between IN and GND, and ≥2.2 µF ceramic output capacitors on both OUT1 and OUT2. For OUT2, if configured for ≤1.8 V, the minimum output capacitance increases to 4.7 µF. A 0.01 µF ceramic capacitor on the NR pin is strongly recommended to achieve the specified 32 µV_rms output noise. All capacitors must be placed close to their respective pins to ensure stability and optimal transient response - the TPS71319DRCT is not stable with tantalum or electrolytic capacitors alone.

How does the integrated supply voltage supervisor (SVS) function in the TPS71319DRCT?

The SVS in the TPS71319DRCT continuously monitors only the OUT2 voltage and asserts the open-drain RESET pin low when VOUT2 falls below 95% of its nominal value (e.g., 2.66 V for a 2.8 V setting), with 0.5% hysteresis. RESET remains asserted for 50–200 ms after VOUT2 recovers, providing glitch-free system reset timing. The RESET pin requires an external pull-up resistor (10 kΩ–1 MΩ) to a valid logic voltage ≤ VIN + 0.3 V. This integrated SVS eliminates the need for a discrete supervisor IC in the TPS71319DRCT design.

What thermal performance can be expected from the TPS71319DRCT in a standard PCB layout?

The TPS71319DRCT in its 3 mm × 3 mm SON-10 (DRC) package achieves R_θJA = 52°C/W on a JEDEC High-K test board (3″ × 3″ multilayer with internal ground/power planes). With proper PCB design - including soldering the exposed thermal pad to a solid ground plane and using thermal vias - junction temperature rise can be kept within safe limits. At 250 mA per channel and 125 mV dropout, power dissipation is ~63 mW per LDO; under worst-case ambient (85°C), this yields ~117°C junction temperature - well below the +125°C max operating limit and thermal shutdown threshold (+160°C).

Can the TPS71319DRCT be used in automotive applications?

The TPS71319DRCT is specified for operation from -40°C to +125°C junction temperature and is qualified per JEDEC standards, making it suitable for under-hood and infotainment applications meeting AEC-Q100 Grade 2 (–40°C to +105°C ambient) requirements. However, it is not officially AEC-Q100 certified - TI offers the pin-compatible TPS71319QDRCRQ1 variant for full automotive qualification. For non-safety-critical automotive subsystems (e.g., telematics power rails), the TPS71319DRCT may be used with appropriate system-level validation, but the TPS71319QDRCRQ1 is required for ASIL-B or higher compliance.