Texas Instruments TPS71727DSER

Overview

TPS71727DSER from Texas Instruments is a fixed-output, low-noise, high-PSRR linear regulator delivering 2.7 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 - designed for powering noise-sensitive analog and RF circuitry in portable wireless systems.

For engineers reviewing the TPS71727DSER datasheet, TPS71727DSER pinout, TPS71727DSER application, or TPS71727DSER equivalent, key selection considerations include ultra-low ground current (45 μA), SC-70-5 package compatibility, noise reduction capacitor support (0.01 μF on NR pin), and guaranteed ±3% output accuracy across –40°C to 125°C.

Technical Context

The TPS71727DSER uses a PMOS pass device and high-gain BiCMOS error amplifier to achieve fast transient response, stable operation with only 1 μF ceramic output capacitance, and high PSRR even at low headroom (e.g., 70 dB at 1 kHz with VIN – VOUT = 1 V). Its quick-start circuit charges the NR capacitor within ~160 μs for rapid enable-to-regulation timing.

It integrates undervoltage lockout (UVLO rising threshold 2.45 V), thermal shutdown (160°C trip, 140°C reset), and internal current limiting (200–575 mA). The fixed 2.7 V output version features a dedicated NR pin - unlike adjustable variants - enabling bandgap noise filtering and improved high-frequency PSRR without external feedback components.

Key Specifications

Pinout & Package

TPS71727DSER is packaged in a 5-pin SC-70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for space-constrained portable designs. Thermal performance is characterized by R_θJA = 279.2°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS71727DSER, TPS7A0527PDBVR trades PSRR and dropout for lower quiescent current, while MCP1700T-2702E/TT sacrifices noise performance and PSRR for cost - making TPS71727DSER the optimal choice when simultaneous low noise, high PSRR, and compact SC-70 packaging are mandatory.

Availability

TPS71727DSER is available at Aetrix Electronics and suitable for camera sensor power, mobile RF front-end biasing, wearable health monitor analog front-ends, and industrial IoT edge sensor nodes requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS71727DSER 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 engineered specifically for ultra-low-noise, high-PSRR regulation in space-constrained, battery-powered RF and imaging applications - emphasizing SC-70 integration, sub-50 μA quiescent current, and robust transient immunity.

FAQ

What is the minimum input voltage required for TPS71727DSER to regulate 2.7 V output?

The TPS71727DSER requires a minimum input voltage of 2.87 V under full-load conditions (150 mA), based on its 170 mV typical dropout voltage. At lighter loads, input can drop closer to 2.7 V + V_DO(light), but the absolute minimum specified operating input is 2.5 V - below which UVLO disables regulation. For reliable operation across temperature and process variation, maintain VIN ≥ 2.9 V at 150 mA.

Does TPS71727DSER require an external noise reduction capacitor?

Yes - the TPS71727DSER has a dedicated NR pin that must be connected to a 0.01 μF ceramic capacitor to achieve its specified 30 μV_RMS output noise and high-frequency PSRR. Omitting this capacitor increases output noise by up to 3× and degrades PSRR above 10 kHz. The quick-start circuit fully charges this capacitor within ~160 μs at power-up.

Can TPS71727DSER operate with zero load current?

Yes - the TPS71727DSER is explicitly designed to remain stable and well-regulated with no output load. Its low-current mode circuit maintains loop gain at light loads, ensuring ±3% output accuracy and minimal voltage deviation even at 0 mA output - critical for intermittent-sensing applications where the load may be disconnected.

What is the thermal shutdown behavior of TPS71727DSER?

The TPS71727DSER activates thermal shutdown at approximately 160°C junction temperature and resets at ~140°C. During shutdown, the output is disabled and ground current drops to ≤1.5 μA. Cycling indicates excessive power dissipation - for reliable operation, design to keep T_J ≤ 125°C using the SC-70 package's R_θJA = 279.2°C/W and ambient thermal management.

Is TPS71727DSER compatible with 1.8 V microcontroller GPIO for enable control?

Yes - the TPS71727DSER EN pin has a guaranteed V_EN(high) threshold of 1.2 V minimum, making it fully compatible with standard 1.8 V GPIO outputs. Driving EN to 1.8 V ensures reliable turn-on across temperature and process corners, with input leakage current ≤1.0 μA at 6.5 V - eliminating need for external pull-ups or level shifters.