Texas Instruments TPS76530DRG4

Overview

TPS76530DRG4 from Texas Instruments is a 3.0-V fixed-output, ultra-low quiescent current (35 µA typ), 150-mA low-dropout linear regulator in an 8-pin SOIC package. It features PMOS pass element architecture, 160 mV typical dropout at 150 mA, open-drain power-good (PG) output, and thermal shutdown protection. It is designed for battery-powered portable electronics requiring long operating life and stable regulation under light-to-moderate load.

For engineers reviewing the TPS76530DRG4 datasheet, TPS76530DRG4 pinout, TPS76530DRG4 application, or TPS76530DRG4 equivalent, key selection criteria include dropout voltage at full load, ground current vs. load/temperature, PG trip threshold (92–98% VO), input voltage range (4.0 V to 10 V), and compatibility with 4.7-µF output capacitors with 300 mΩ–20 Ω ESR.

Technical Context

The TPS76530DRG4 employs a PMOS pass transistor, enabling ultra-low and load-independent quiescent current (35 µA typ over 0–150 mA). Its dropout voltage scales linearly with output current due to the resistive behavior of the PMOS channel, yielding 160 mV typ at 150 mA and remaining stable across –40°C to 125°C.

It integrates an internal 1.224-V reference, precision error amplifier, open-drain PG comparator with hysteresis (0.5% VO), and thermal shutdown (150°C trip). The EN pin supports TTL-compatible enable/disable control, reducing quiescent current to <1 µA in shutdown mode with fast 160-µs wake-up time.

Key Specifications

Pinout & Package

TPS76530DRG4 is housed in an 8-pin SOIC (D) package with exposed pad not present; standard JEDEC MS-012AC footprint. Pin 1 is NC/FB (no-connect for fixed-output variants), Pin 2 is PG (open-drain), Pins 3 and 4 are GND and EN respectively, Pins 5–6 are dual IN inputs, and Pins 7–8 are dual OUT outputs - enabling high-current routing and reduced trace resistance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-quiescent-current LDO applications.

Compared with TPS76530DRG4, TPS76533DR offers identical functionality at 3.3 V with slightly lower dropout, while MCP1700T-3002E/MB trades supervision features for nanoamp quiescent current and smaller footprint - making it suitable only for simpler, non-monitored rails.

Availability

TPS76530DRG4 is available at Aetrix Electronics and suitable for portable medical sensors, wireless sensor nodes, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TPS76530DRG4 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 over 50 years of innovation in high-reliability components.

The TPS765xx family was engineered specifically for ultra-low-power battery-operated systems demanding long runtime, precise voltage regulation, and integrated supervision - targeting portable instrumentation, wearables, and remote sensing.

FAQ

What is the minimum input voltage required for stable regulation of the TPS76530DRG4?

The TPS76530DRG4 requires a minimum input voltage of 4.0 V - defined as VO(typ) + 1 V per datasheet. Below this, dropout behavior begins; at 150 mA load, regulation holds until VI drops to ~3.16 V (3.0 V + 160 mV dropout), but line regulation degrades outside the 4.0–10 V recommended range. Always maintain VI ≥ 4.0 V for guaranteed 3.0-V output accuracy and PSRR performance.

Does the TPS76530DRG4 require an external pull-up resistor on the PG pin?

Yes, the PG pin on the TPS76530DRG4 is an open-drain output and requires an external pull-up resistor to a valid logic-high voltage (e.g., 3.0 V or 3.3 V) to generate a functional power-good signal. Typical values range from 10 kΩ to 100 kΩ. Leaving PG floating is permissible if unused, but no logic-level signal will be generated without the pull-up.

Can the TPS76530DRG4 operate without an output capacitor?

No - the TPS76530DRG4 requires a minimum 4.7-µF output capacitor with ESR between 300 mΩ and 20 Ω for loop stability. Omitting it causes oscillation or erratic regulation. Solid tantalum, aluminum electrolytic, or multilayer ceramic capacitors meeting these ESR constraints are acceptable; ceramic types must include series resistance or be selected for adequate ESR.

What happens to quiescent current when the TPS76530DRG4 enters dropout?

The TPS76530DRG4 maintains its ultra-low quiescent current (35 µA typ) even in dropout, unlike bipolar-based LDOs whose I_Q rises sharply. This is due to its PMOS pass element, which remains voltage-driven with no gate current dependency. As a result, battery discharge remains predictable and minimized during brownout conditions - a key advantage for energy-sensitive applications.

Is the TPS76530DRG4 pin-compatible with other members of the TPS765xx family?

Yes - all TPS765xx devices, including TPS76530DRG4, share identical 8-pin SOIC (D) packaging and pinout. The only functional differences are output voltage (1.5 V to 5.0 V or adjustable), dropout voltage scaling, and input voltage minimums. This allows direct substitution within the same package footprint when voltage and input requirements align.