Texas Instruments TPS77615PWPRG4

Overview

TPS77615PWPRG4 from Texas Instruments is a 500mA, 1.5V fixed-output low-dropout (LDO) voltage regulator with power-good (PG) output, PMOS pass element, 169mV typical dropout at 500mA, ±2% output voltage tolerance over line/load/temperature, and 85µA typical quiescent current. It operates from 2.7V to 10V input and supports FPGA core power, DSP I/O rails, and battery-powered embedded systems.

For engineers reviewing the TPS77615PWPRG4 datasheet, TPS77615PWPRG4 pinout, TPS77615PWPRG4 application, or TPS77615PWPRG4 equivalent, key selection criteria include PG output timing behavior, thermal shutdown threshold (150°C), SOIC-8 vs. TSSOP-20 package thermal performance, and compatibility with 10µF low-ESR output capacitors for fast transient response.

Technical Context

The TPS77615PWPRG4 uses a PMOS pass transistor enabling ultralow, load-independent quiescent current (85µA typ) and dropout voltage directly proportional to output current. Its internal 1.183V reference and error amplifier drive the gate of the PMOS device to regulate output voltage with 2% accuracy across –40°C to +125°C.

It integrates an open-drain power-good (PG) output that asserts high when VOUT reaches ≥92% of nominal (1.395V) and deasserts low when VOUT falls below 98% hysteresis threshold (1.47V), with no internal delay-unlike the RESET variant's 200ms timeout. The EN pin enables TTL-compatible shutdown, reducing quiescent current to 1µA.

Key Specifications

Pinout & Package

TPS77615PWPRG4 is packaged in a 20-pin HTSSOP PowerPAD™ (PWP) with exposed thermal pad soldered to PCB ground plane for enhanced heat dissipation. The package supports up to 3460mW at TA = +25°C with recommended copper layout on 1-layer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS77615PWPRG4, TPS77615PWPR offers identical performance in a functionally equivalent package, while TPS76715QDG4R trades higher IQ and larger dropout for AEC-Q100 qualification and doubled current capacity - making it suitable for automotive systems but less optimal for space- or battery-constrained industrial nodes.

Availability

TPS77615PWPRG4 is available at Aetrix Electronics and suitable for FPGA core power, DSP I/O supply, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TPS77615PWPRG4 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 decades of LDO design expertise and broad industrial qualification coverage.

The TPS776xx family was designed specifically for high-performance, low-quiescent-current applications in portable and embedded systems - emphasizing fast transient response, precision output regulation, and integrated power supervision via PG output.

FAQ

What is the function of the RESET/PG pin on the TPS77615PWPRG4?

The RESET/PG pin on the TPS77615PWPRG4 is an open-drain, active-high power-good (PG) output. It transitions high when the regulated 1.5V output reaches ≥92% of nominal (≥1.395V) and goes low when VOUT drops below 98% (≤1.47V), with 0.5% hysteresis. Unlike the TPS775xx RESET variant, the TPS77615PWPRG4 PG has no built-in 200ms delay - its assertion is immediate and synchronous with output voltage crossing the threshold. An external pull-up resistor is required.

Does the TPS77615PWPRG4 require a minimum load current to maintain regulation?

No, the TPS77615PWPRG4 does not require a minimum load current. It remains stable and fully regulated from 0mA to 500mA output current, thanks to its PMOS pass architecture and internal compensation optimized for 10µF low-ESR output capacitors. This zero-load stability simplifies design in standby or intermittent-operation systems where load may drop to near-zero between active cycles.

What is the maximum allowable input voltage for the TPS77615PWPRG4?

The absolute maximum input voltage for the TPS77615PWPRG4 is +13.5V, but the recommended operating range is 2.7V to 10V. Operation above 10V is not characterized and may degrade long-term reliability. For 1.5V output, the minimum input is VIN ≥ VOUT + VDO ≈ 1.669V - however, the datasheet specifies 2.7V as the practical lower limit due to internal circuitry requirements and startup behavior.

Can the TPS77615PWPRG4 be used with ceramic output capacitors?

Yes, the TPS77615PWPRG4 is compatible with multilayer ceramic capacitors (MLCCs) as output capacitors, provided they meet the 10µF minimum capacitance and 50mΩ–1.5Ω ESR range. MLCCs within this ESR window ensure loop stability and fast transient response. Avoid ultra-low-ESR ceramics (<50mΩ) unless verified with TI's stability guidelines, as they may induce oscillation in some PCB layouts.

How does the EN pin behave, and what voltage levels enable/disable the TPS77615PWPRG4?

The EN pin on the TPS77615PWPRG4 is an active-high enable input with TTL-compatible thresholds: it enables regulation when voltage exceeds 1.7V (VEN(HI)) and disables the output when pulled below 0.9V (VEN(LO)). In shutdown, quiescent current drops to 1µA at TJ = +25°C. The pin draws ≤1µA, allowing direct connection to MCU GPIO without level-shifting. Leaving EN floating is not recommended - tie to VIN or use a pull-up if unused.