Texas Instruments TPS76527DRG4

Overview

TPS76527DRG4 from Texas Instruments is a 2.7-V fixed-output, 150-mA ultra-low-quiescent-current LDO voltage regulator featuring PMOS pass element, 35-µA typical ground current, 85-mV typical dropout at 150 mA (TPS76550), ±3% output tolerance over temperature/load, and open-drain power-good (PG) output. It enables long battery life in portable instrumentation and low-power microcontroller subsystems.

For engineers reviewing the TPS76527DRG4 datasheet, TPS76527DRG4 pinout, TPS76527DRG4 application, or TPS76527DRG4 equivalent, key selection criteria include quiescent current stability across load, PG threshold hysteresis (0.5% VO), minimum input voltage (3.7 V), thermal shutdown (150°C), and SOIC-8 compatibility with 4.7-µF output capacitor.

Technical Context

The TPS76527DRG4 uses a PMOS pass transistor to achieve voltage-driven control, resulting in load-independent quiescent current (35 µA typ, ≤50 µA max over –40°C to 125°C) and low dropout (220 mV max at 150 mA, TJ = –40°C to 125°C). Its internal 1.224-V reference and error amplifier maintain regulation with 0.3% load regulation and 0.01%/V line regulation.

Power-good logic monitors output voltage with 92–98% VO trip threshold and 0.5% VO hysteresis; the open-drain PG output requires external pull-up. Enable (EN) input supports TTL-compatible shutdown, reducing quiescent current to ≤10 µA (max) in standby mode.

Key Specifications

Pinout & Package

TPS76527DRG4 is housed in an 8-pin SOIC (D) package with exposed pad not present; footprint matches JEDEC MS-012AC. Pin functions are validated per TI SLVS236 datasheet Section 4 (Terminal Functions).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS76527DRG4, TPS76527DR offers identical regulation performance in reel format for volume manufacturing, while MCP1702T-2702E/MB trades away PG and dual-pin robustness for lower IQ and smaller footprint - making it viable only where those features are omitted from system requirements.

Availability

TPS76527DRG4 is available at Aetrix Electronics and suitable for portable medical sensors, low-power MCU subsystems, and industrial data loggers requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TPS76527DRG4 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TPS765xx family was designed specifically for battery-powered applications demanding ultra-low quiescent current, stable operation with minimal output capacitance, and integrated power-good signaling - targeting portable instrumentation, wearables, and remote sensing nodes.

FAQ

What is the minimum input voltage required for stable operation of the TPS76527DRG4?

The TPS76527DRG4 requires a minimum input voltage of 3.7 V under recommended operating conditions, as specified in the datasheet. This ensures sufficient headroom above the 2.7-V output to maintain regulation across temperature and load extremes. At 150 mA load and –40°C to 125°C, the maximum dropout is 220 mV, so VIN must remain ≥2.92 V - however, the absolute minimum VIN is set to 3.7 V to guarantee performance across all test conditions. The TPS76527DRG4 will not regulate properly if VIN falls below this threshold.

Does the TPS76527DRG4 require an external pull-up resistor on the PG pin?

Yes, the TPS76527DRG4 PG pin is an open-drain output and requires an external pull-up resistor to a valid logic-high voltage (e.g., VO or another regulated rail). The datasheet specifies that PG asserts low when output voltage drops to 92–98% of nominal, and the internal transistor cannot drive high. Typical pull-up values range from 10 kΩ to 100 kΩ; selection depends on rise time requirements and bus loading. Leaving PG unconnected is acceptable if unused, but no pull-up means no active power-good signaling.

Can the TPS76527DRG4 operate without a minimum load current?

Yes, the TPS76527DRG4 is explicitly designed to be stable with zero load current. The datasheet confirms "no minimum load is required for operation" and characterizes ground current down to 10 µA. Unlike some older LDOs, its PMOS pass architecture and compensation scheme ensure loop stability across the full 0–150 mA output range. This makes the TPS76527DRG4 ideal for intermittent-load applications such as sensor wake-up circuits where current draw drops to near-zero between measurements.

What capacitor types and values are recommended for the TPS76527DRG4 output?

The TPS76527DRG4 requires a minimum 4.7-µF output capacitor with ESR between 300 mΩ and 20 Ω. Valid types include solid tantalum, aluminum electrolytic, and multilayer ceramic capacitors meeting those ESR constraints. The datasheet validates stability with 4.7 µF tantalum and notes that larger values (e.g., 10 µF) are acceptable if ESR remains within limits. Ceramic capacitors must include series resistance or be selected for ESR ≥300 mΩ; standard X7R/X5R ceramics often require added 1–2 Ω in series to meet stability criteria shown in Figures 21–24.

How does the enable (EN) function behave during power-up and shutdown of the TPS76527DRG4?

Applying a high signal (≥2.0 V) to EN enables the TPS76527DRG4, and regulated output is established in typically 160 µs. During shutdown, pulling EN low (≤0.8 V) disables the pass element, placing OUT in high-impedance state and reducing quiescent current to ≤10 µA (max). The EN pin has negligible input current (±1 µA), allowing direct connection to GPIO without level-shifting. Importantly, EN does not affect PG behavior - PG remains valid as long as VO is within specification, regardless of EN state.