Texas Instruments TLV1117-50IDRJRG4

Overview

TLV1117-50IDRJRG4 from Texas Instruments is a fixed-output, 5.0 V, 800 mA low-dropout linear voltage regulator in an 8-pin WSON (DRJ) package. It operates from 6.5 V to 15 V input, delivers ±1.0% output accuracy at 25°C, features 70 dB ripple rejection at 120 Hz, and integrates foldback current limiting, thermal shutdown, undervoltage lockout (UVLO), and internal output pulldown for robust power management in space-constrained industrial systems.

For engineers reviewing the TLV1117-50IDRJRG4 datasheet, TLV1117-50IDRJRG4 pinout, TLV1117-50IDRJRG4 application, or TLV1117-50IDRJRG4 equivalent, this page provides verified electrical parameters, thermal metrics, functional block context, and real-world implementation guidance specific to the DRJ-packaged fixed 5.0 V variant - including UVLO thresholds (2.2 V rising / 1.9 V falling), 0.8–1.2 V dropout at 800 mA, and 65–110 µA quiescent current in shutdown-ready operation.

Technical Context

The TLV1117-50IDRJRG4 implements a CMOS-based LDO architecture with a precision 1.25 V internal bandgap reference, enabling tight output regulation across temperature and load. Its fixed 5.0 V output eliminates external resistor networks, while integrated UVLO (2.2 V rise/1.9 V fall with 130 mV hysteresis) prevents erratic startup during brownout conditions.

This DRJ-packaged variant uses an 8-pin WSON footprint with three VIN pins (2, 3, 4), three VOUT pins (5, 6, 7), one ADJ/GND pin (1), and one NC pin (8), supporting high-current routing and low-inductance layout. Thermal performance is characterized by R_θJA = 38.3°C/W and R_θJB = 60.5°C/W, optimized for PCB copper area conduction rather than heatsink attachment.

Key Specifications

Pinout & Package

TLV1117-50IDRJRG4 is housed in an 8-pin, 4 mm × 4 mm WSON (DRJ) package with exposed thermal pad. The package supports high-current density routing via three parallel VIN and three parallel VOUT pins, minimizing trace resistance and inductance in compact layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F5BEXX and TPS7A4701RGWR, TLV1117-50IDRJRG4 offers balanced integration of protection features (UVLO, foldback, thermal shutdown), industry-standard 5.0 V accuracy, and WSON-8 thermal efficiency at lower BOM cost - making it optimal for industrial and consumer embedded systems where automotive qualification or ultra-low noise are unnecessary.

Availability

TLV1117-50IDRJRG4 is available at Aetrix Electronics and suitable for smart metering, HVAC control, home theater audio, and industrial motor drive applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TLV1117-50IDRJRG4 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 connectivity technologies, with decades of LDO regulator innovation and broad industrial qualification.

The TLV1117 product line delivers cost-optimized, feature-rich linear regulators for space-constrained industrial, appliance, and building automation systems - emphasizing thermal robustness, integrated protection, and ease of layout in WSON and TO-252 packages.

FAQ

What is the minimum input voltage required for TLV1117-50IDRJRG4 to maintain 5.0 V regulation?

The TLV1117-50IDRJRG4 requires a minimum input voltage of 6.5 V to sustain full 5.0 V output at 800 mA load, based on its 1.5 V headroom requirement (VIN ≥ VOUT + 1.5 V). At lighter loads, dropout drops to 0.8 V, allowing operation down to 5.8 V input while maintaining regulation - verified per Section 5.3 Recommended Operating Conditions in the datasheet.

Does TLV1117-50IDRJRG4 require an external capacitor on the ADJ pin?

No - TLV1117-50IDRJRG4 is a fixed-output variant; Pin 1 (ADJ/GND) functions solely as ground and does not require any external components. Unlike adjustable versions, there is no feedback network or capacitor needed on this pin, simplifying layout and reducing BOM count.

How does the foldback current limit in TLV1117-50IDRJRG4 improve system reliability compared to standard current limiting?

The foldback current limit in TLV1117-50IDRJRG4 reduces output current to ~250 mA during short-circuit events (vs. constant 800 mA in brick-wall mode), cutting power dissipation by >60%. This prevents rapid junction temperature rise, delays thermal shutdown activation, and avoids destructive thermal cycling - enhancing long-term reliability in unattended industrial deployments.

Can TLV1117-50IDRJRG4 be used without a heatsink in a 4-layer PCB design?

Yes - the TLV1117-50IDRJRG4 in its WSON-8 (DRJ) package achieves R_θJB = 60.5°C/W when soldered to a standard 4-layer board with 1 oz copper and thermal vias under the exposed pad. At 800 mA and 10°C/W board thermal resistance, junction rise is ~48°C above ambient, well within the 125°C max TJ limit - eliminating need for external heatsinks in most designs.

What is the purpose of the NC pin (Pin 8) on TLV1117-50IDRJRG4, and how should it be handled on the PCB?

Pin 8 is a true no-connect (NC) terminal with no internal silicon connection. It must remain unconnected - neither routed nor plated on the PCB. Leaving it unpopulated avoids unintended parasitic coupling or solder bridging risks, and aligns with TI's mechanical recommendations in the DRJ package drawing (SLVS561O, Section 10).