Texas Instruments TPS76615D

Overview

TPS76615D from Texas Instruments is a 1.5V fixed-output, 250mA low-dropout linear voltage regulator in an 8-pin SOIC package. It operates from 2.5V to 16V input, delivers ±1% output accuracy over load and temperature, features open-drain power-good signaling, and supports stable operation with ≥2.2µF output capacitance - used for powering microcontrollers and SiC gate drivers in HVAC control modules.

For engineers reviewing the TPS76615D datasheet, TPS76615D pinout, TPS76615D application, or TPS76615D equivalent, key selection criteria include dropout voltage at full load (270mV typ), thermal shutdown threshold (173°C), enable logic thresholds (0.4V low / 1.2V high), and PSRR performance (46dB at 1MHz) in noise-sensitive industrial power rails.

Technical Context

The TPS76615D implements a PMOS pass transistor architecture enabling low dropout and high PSRR. Its internal soft-start (750µs typical) limits inrush current, while the open-drain PG output requires an external pullup for power-on reset generation.

It integrates overcurrent limiting (0.725A min), thermal shutdown with hysteresis (157°C reset), and operates across –40°C to +125°C junction temperature. The EN pin accepts TTL-compatible logic levels and reduces standby current to 0.9µA typical when asserted high.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (D), 4.9mm × 6mm body, standard JEDEC MS-012AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS76615D, TPS76715D sacrifices PG and PSRR for lower BOM count, while MCP1700T-1502E/MB trades output current and input range for ultra-low IQ and compact packaging - neither matches the full specification set of the TPS76615D for 12V-input, 250mA, PG-enabled designs.

Availability

TPS76615D is available at Aetrix Electronics and suitable for residential HVAC systems, industrial motor drives, automotive body electronics, and white goods requiring stable component supply with long-term manufacturability.

Supply support for TPS76615D 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.

The TPS766 family is designed for industrial and automotive power management applications demanding wide input range, high accuracy, and robust protection features in compact packages.

FAQ

What is the maximum input voltage rating for the TPS76615D?

The TPS76615D has an absolute maximum input voltage of 18V, with recommended operation up to 16V. This allows direct use with 12V transformer-derived supplies and compatibility with regulated intermediate rails in multi-rail systems. Exceeding 18V risks permanent damage per the absolute maximum ratings table in the datasheet.

Does the TPS76615D require an external feedback resistor network?

No, the TPS76615D is a fixed-output 1.5V regulator. Pin 1 (FB/NC) is not connected internally and should be left floating or tied to GND for improved thermal performance. External resistors are only required for adjustable versions like the TPS76601.

What output capacitor value is required for stable operation of the TPS76615D?

The TPS76615D is stable with a minimum 2.2µF ceramic or polymer output capacitor. Using ≥4.7µF improves transient response and PSRR. Electrolytic or tantalum capacitors are not required, reducing size and improving reliability compared to legacy LDOs.

How does the power-good (PG) output function on the TPS76615D?

The PG pin on the TPS76615D is an open-drain output that goes high (via external pullup) when VOUT reaches 91–98.5% of nominal 1.5V and remains valid. It asserts low during undervoltage or startup. This signal is commonly used to generate power-on reset pulses or trigger system fault interrupts.

What is the thermal shutdown behavior of the TPS76615D?

The TPS76615D shuts down at a junction temperature of 173°C and resumes operation only after cooling to 157°C, providing 16°C hysteresis. This prevents rapid cycling during thermal overload and protects both the TPS76615D and downstream circuitry during sustained overcurrent or poor heatsinking conditions.