Texas Instruments TPS71711DCKTG4

Overview

TPS71711DCKTG4 from Texas Instruments is a fixed-output, 1.1-V low-dropout linear regulator with PMOS pass device, 170-mV typical dropout at 150 mA, 30-μVRMS output noise (100 Hz–100 kHz), and 70-dB PSRR at 1 kHz - designed for powering noise-sensitive analog and RF circuitry in portable battery-operated systems.

For engineers reviewing the TPS71711DCKTG4 datasheet, TPS71711DCKTG4 pinout, TPS71711DCKTG4 application, or TPS71711DCKTG4 equivalent, key selection criteria include ultra-low noise performance under light-to-moderate load, high PSRR across 100 Hz–1 MHz, fast startup with NR capacitor support, SC-70-5 package footprint constraints, and thermal shutdown behavior in compact layouts.

Technical Context

The TPS71711DCKTG4 employs a BiCMOS-based error amplifier with high-gain, high-bandwidth feedback loop to achieve stable regulation with only 1-μF ceramic output capacitance. Its PMOS pass transistor enables low dropout and eliminates reverse current flow without external diode.

Fixed-output variants like TPS71711DCKTG4 integrate a dedicated NR (Noise Reduction) pin that filters bandgap reference noise via an external 0.01-μF capacitor, reducing integrated output noise by up to 75% versus NR-open configuration - critical for camera sensor and RF front-end power rails.

Key Specifications

Pinout & Package

TPS71711DCKTG4 is packaged in a 5-pin SC-70 (DCK) package, measuring 2.00 mm × 1.25 mm with 0.65-mm lead pitch. The package features gull-wing leads and is RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS71711DCKTG4, TPS71712DCKTG4 offers identical performance in every parameter except output voltage, making it a direct functional alternative for 1.2-V systems; MCP1700T-1102E/TT trades noise/PSRR performance for lower cost and wider input range, requiring careful evaluation in noise-sensitive signal chains.

Availability

TPS71711DCKTG4 is available at Aetrix Electronics and suitable for camera sensor power, mobile phone baseband supplies, Bluetooth audio codecs, wearable health monitors, and other applications requiring stable component supply with tight noise and PSRR specifications.

Supply support for TPS71711DCKTG4 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 decades of LDO design expertise for high-reliability and low-power applications.

The TPS717 family was engineered specifically for ultra-low-noise, high-PSRR power delivery in space-constrained portable electronics - targeting camera modules, RF transceivers, and precision analog signal chains where traditional LDOs fail to meet noise or transient response requirements.

FAQ

What is the maximum output current capability of the TPS71711DCKTG4?

The TPS71711DCKTG4 delivers up to 150 mA continuous output current under recommended operating conditions. Its internal current limit is specified between 200 mA and 575 mA depending on input voltage and temperature, but sustained operation above 150 mA is not guaranteed and may trigger thermal shutdown. For reliable 150-mA operation, ensure adequate PCB copper area and ambient temperature ≤85°C.

Does the TPS71711DCKTG4 require an external noise reduction capacitor?

Yes - the TPS71711DCKTG4 includes an NR (Noise Reduction) pin that must be connected to a 0.01-μF ceramic capacitor to achieve its rated 30-μVRMS output noise. Without this capacitor, output noise rises significantly (e.g., ~95×VOUT μVRMS). The NR capacitor also enables the internal quick-start circuit, reducing startup time to ~160 μs.

Can the TPS71711DCKTG4 operate with a 2.5-V input supplying a 1.1-V output?

Yes - the TPS71711DCKTG4 supports input voltages from 2.5 V to 6.5 V. With a 2.5-V input and 1.1-V output, headroom is 1.4 V, well above the 170-mV typical dropout voltage. This ensures full regulation and maintains PSRR, noise, and transient performance across the entire 150-mA load range.

What is the enable pin behavior and logic threshold for the TPS71711DCKTG4?

The EN pin on the TPS71711DCKTG4 is active-high with VEN(high) ≥1.2 V (min) to enable regulation and VEN(low) ≤0.4 V (max) to enter shutdown mode drawing only 0.2–1.5 μA. It is TTL/CMOS-compatible and can be driven directly from 1.2-V, 1.8-V, or 3.3-V GPIOs without level shifting. Tying EN to IN is acceptable if always-on operation is required.

Is the TPS71711DCKTG4 stable with ceramic output capacitors smaller than 1 μF?

No - the TPS71711DCKTG4 requires a minimum 1-μF ceramic output capacitor (X5R or X7R dielectric) for guaranteed stability across all operating conditions. Using smaller values risks oscillation or degraded transient response. The datasheet explicitly specifies COUT ≥1 μF, and TI validation confirms stability only within this range.