Texas Instruments TPS71701DCKTG4

Overview

TPS71701DCKTG4 from Texas Instruments is an adjustable-output, low-noise, high-PSRR linear regulator in a 5-pin SC-70 package. It delivers up to 150 mA with 170 mV typical dropout at full load, 30 µV_RMS output noise (100 Hz–100 kHz), and 70 dB PSRR at 1 kHz - optimized for RF sensor biasing and precision analog power in space-constrained portable systems.

For engineers reviewing the TPS71701DCKTG4 datasheet, TPS71701DCKTG4 pinout, TPS71701DCKTG4 application, or TPS71701DCKTG4 equivalent, key selection criteria include ultra-low ground current (45 µA typ), noise reduction capacitor support (NR pin), thermal shutdown (160°C), and compatibility with 1-µF ceramic output capacitance - all critical for battery-powered imaging and wireless front-end designs.

Technical Context

The TPS71701DCKTG4 uses a PMOS pass device with BiCMOS process technology to achieve fast startup, low noise, and high PSRR across wide frequency range. Its feedback architecture includes a precision 0.793 V reference (±2% over temp) and supports external resistor divider on FB/NR pin for output adjustment from 0.9 V to 6.2 V.

It integrates undervoltage lockout (UVLO rising threshold 2.45 V), active-high enable (VEN(high) = 1.2 V min), and thermal shutdown with hysteresis (140°C reset). The NR pin enables optional noise filtering via external capacitor, reducing output spectral noise density by >5× when C_NR = 0.01 µF.

Key Specifications

Pinout & Package

TPS71701DCKTG4 is housed in a 5-pin SC-70 (DCK) package measuring 2.00 mm × 1.25 mm, with exposed pad not present. Thermal resistance R_θJA = 279.2°C/W enables operation up to 125°C junction temperature with minimal PCB copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS71701DCKTG4, TPS7A0533PDBVR offers higher output current but sacrifices adjustability and noise performance, while MCP1703T-3302E/MB trades off PSRR, enable control, and dropout for lower unit cost - making TPS71701DCKTG4 optimal for noise-critical, space-constrained, and battery-sensitive designs requiring flexible output voltage.

Availability

TPS71701DCKTG4 is available at Aetrix Electronics and suitable for camera sensor power, mobile RF front-end biasing, wearable health monitors, and industrial sensor nodes requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS71701DCKTG4 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 designing analog ICs, embedded processors, and system solutions for industrial, automotive, and consumer markets.

The TPS717 family targets ultra-low-noise, high-PSRR LDO regulation in miniature packages - specifically engineered for RF, imaging, and portable electronics where power integrity and board space are critical constraints.

FAQ

What output voltage range does the TPS71701DCKTG4 support?

The TPS71701DCKTG4 is an adjustable LDO with output voltage set externally via resistor divider on the FB/NR pin. It supports 0.9 V to 6.2 V output, referenced to its internal 0.793 V bandgap. This flexibility allows precise tailoring for diverse analog and mixed-signal loads without requiring multiple fixed-voltage variants.

How does the NR pin function in the TPS71701DCKTG4?

In the TPS71701DCKTG4, the NR/FB pin serves dual purpose: as feedback input for output voltage setting. When used as NR, it connects to a noise-reduction capacitor (typically 0.01 µF) to filter bandgap reference noise - reducing output spectral noise density by up to 5× and enabling cleaner power for RF and precision analog circuits.

What is the minimum output capacitance required for stability of the TPS71701DCKTG4?

The TPS71701DCKTG4 requires a minimum 1 µF ceramic output capacitor connected between OUT and GND for guaranteed stability across all operating conditions. TI specifies this value with ±20% tolerance ceramic dielectrics (X5R/X7R); smaller values risk oscillation, especially under light or zero-load conditions.

Does the TPS71701DCKTG4 include thermal protection?

Yes, the TPS71701DCKTG4 integrates thermal shutdown protection that disables the output when junction temperature reaches approximately 160°C. It automatically recovers when temperature falls to ~140°C. This feature prevents permanent damage during overload or poor heatsinking, though continuous cycling indicates inadequate thermal design.

Can the TPS71701DCKTG4 operate with input voltage below 2.5 V?

No - the absolute minimum input voltage for the TPS71701DCKTG4 is 2.5 V per recommended operating conditions. Below this, UVLO prevents regulation; the device remains disabled even if EN is asserted. For sub-2.5 V inputs, alternative regulators such as TPS7A02 or TPS7A16A must be considered.