Texas Instruments TPS71719DCKTG4

Overview

TPS71719DCKTG4 from Texas Instruments is a fixed-output, low-noise, high-PSRR linear regulator delivering 1.9 V at up to 150 mA with 170 mV typical dropout, 30 µV_RMS output noise (100 Hz–100 kHz), and 70 dB PSRR at 1 kHz - optimized for camera sensor power in space-constrained mobile devices.

For engineers reviewing the TPS71719DCKTG4 datasheet, TPS71719DCKTG4 pinout, TPS71719DCKTG4 application, or TPS71719DCKTG4 equivalent, this page provides verified package mapping (SC-70-5), confirmed thermal performance (R_θJA = 279.2°C/W), validated startup behavior (0.16 ms for 1.9 V output), and real-world noise reduction capacitor guidance (0.01 µF on NR pin).

Technical Context

The TPS71719DCKTG4 uses a PMOS pass device with BiCMOS process technology to achieve fast start-up, ultra-low ground current (45 µA typical), and stable regulation with only 1 µF ceramic output capacitance. Its error amplifier features high gain and bandwidth to sustain 70 dB PSRR at 1 kHz while maintaining <3% output accuracy over –40°C to 125°C.

A dedicated noise reduction (NR) pin bypasses bandgap reference noise via an external 0.01 µF capacitor, enabling 30 µV_RMS noise performance; a quick-start circuit fully charges CNR within 135 µs. The device integrates undervoltage lockout (UVLO rising threshold 2.45 V), thermal shutdown (160°C), and current limiting (200–575 mA).

Key Specifications

Pinout & Package

TPS71719DCKTG4 is housed in a 5-pin SC-70 package (2.00 mm × 1.25 mm), optimized for ultra-compact PCB layouts in portable electronics. Thermal performance is characterized with R_θJA = 279.2°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS71719DCKTG4, TPS717185DCKR offers identical performance at 1.85 V with full pin compatibility, while MCP1703T-1902E/MB trades 10 dB PSRR and 10 µV_RMS noise for lower unit cost - making the former ideal for voltage-tolerant upgrades and the latter suitable only for non-critical digital loads.

Availability

TPS71719DCKTG4 is available at Aetrix Electronics and suitable for camera sensor power, mobile phone baseband supplies, wireless audio codecs, and portable medical imaging systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS71719DCKTG4 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 and embedded processing technologies, with decades of expertise in precision power management ICs.

The TPS717 family was designed specifically for noise-sensitive, battery-powered applications such as camera modules and portable communications equipment - prioritizing ultra-low noise, high PSRR, and minimal quiescent current in sub-2-mm packages.

FAQ

What is the minimum input voltage required for TPS71719DCKTG4 to regulate 1.9 V?

The TPS71719DCKTG4 requires a minimum input voltage of 2.07 V under full-load conditions, calculated as V_OUT + V_DO = 1.9 V + 170 mV. However, the absolute minimum specified input is 2.5 V per datasheet operating conditions - meaning 2.5 V is the guaranteed functional floor across temperature, process, and load extremes. Below 2.5 V, regulation is not assured even if dropout voltage appears sufficient.

Can TPS71719DCKTG4 operate without the NR capacitor?

Yes, TPS71719DCKTG4 functions without the NR capacitor, but output noise increases significantly: from 30 µV_RMS (with 0.01 µF NR) to approximately 95 × V_OUT ≈ 180 µV_RMS. The NR pin is internally connected to the bandgap reference; omitting the capacitor removes high-frequency noise filtering, degrading PSRR above 10 kHz and increasing susceptibility to RF interference in sensitive analog circuits.

Is TPS71719DCKTG4 pin-compatible with other TPS717xx variants in SC-70-5 package?

Yes, all TPS717xx SC-70-5 variants (e.g., TPS717185DCKR, TPS71728DCKR) share identical pinout, footprint, and thermal pad configuration. The only differences are output voltage and minor electrical tolerances - enabling drop-in replacement for voltage tuning without PCB redesign, provided the new V_OUT meets system requirements.

What is the maximum junction temperature for continuous operation of TPS71719DCKTG4?

The TPS71719DCKTG4 is rated for continuous operation up to 125°C junction temperature. While thermal shutdown activates at 160°C, sustained operation above 125°C accelerates parametric drift and reduces long-term reliability. With R_θJA = 279.2°C/W, ambient temperature must be limited to ≤85°C at 150 mA load to maintain T_J ≤125°C - requiring careful thermal layout or derating in enclosed environments.

Does TPS71719DCKTG4 require an external pull-up resistor on the EN pin?

No, TPS71719DCKTG4 does not require an external pull-up on EN. The enable pin has negligible leakage (<1 µA), and the internal circuitry interprets any voltage ≥1.2 V as active. If left floating, EN may float near threshold and cause erratic behavior; therefore, tie EN directly to IN for always-on operation or drive it actively from a GPIO - no pull-up resistor is needed or recommended.