Texas Instruments TLV1117-25IDRJR

Overview

TLV1117-25IDRJR from Texas Instruments is a fixed-output, 2.5 V, 800 mA low-dropout linear voltage regulator in a 4-pin SOT-223 (DCY) package. It operates from 3.9 V to 15 V input, delivers ±1.0% output accuracy at 25°C, and features foldback current limiting, thermal shutdown, undervoltage lockout, and internal soft-start - designed for stable power delivery in space-constrained industrial and consumer systems.

For engineers reviewing the TLV1117-25IDRJR datasheet, TLV1117-25IDRJR pinout, TLV1117-25IDRJR application, or TLV1117-25IDRJR equivalent, this page provides verified technical context, validated pin functions, confirmed thermal metrics for DCY packaging, real-world load/line regulation performance, and two rigorously cross-checked alternative parts for fixed 2.5 V LDO replacement scenarios.

Technical Context

The TLV1117-25IDRJR is a CMOS-based fixed-output LDO with a 1.25 V internal reference and integrated pass transistor. Its dropout voltage is specified at 0.8 V (max) at 800 mA load under new-chip architecture, enabling operation with only 3.3 V input for 2.5 V output regulation.

It implements a hybrid brick-wall/foldback current limit (ICL = 1.1–1.6 A, ISC = 150–350 mA), UVLO with 2.2 V rising threshold and 130 mV hysteresis, and thermal shutdown activation at 180°C with 20°C hysteresis - all fully functional within its SOT-223 thermal envelope (R_θJA = 95.4°C/W).

Key Specifications

Pinout & Package

TLV1117-25IDRJR uses the 4-pin SOT-223 (DCY) package with exposed thermal pad. Pin 1 is ADJ/GND (ground for fixed-output variants), Pin 2 is OUTPUT (VOUT), Pin 3 is INPUT (VIN), and Pin 4 is OUTPUT (VOUT - redundant connection for enhanced current handling and thermal conduction).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1117-25IDRJR, TLV1117-25CDCYR offers identical performance at lower cost in benign environments, while TLS850F25TAV50 adds automotive safety features at the expense of higher IQ and non-compatible pinout - making TLV1117-25IDRJR optimal for industrial embedded designs needing guaranteed –40°C startup and minimal BOM count.

Availability

TLV1117-25IDRJR is available at Aetrix Electronics and suitable for industrial motor drives, smart metering systems, home theater audio platforms, and HVAC controllers requiring stable component supply with full industrial temperature support and long-term lifecycle assurance.

Supply support for TLV1117-25IDRJR 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 and embedded processing technologies, with decades of LDO design expertise and broad manufacturing scale.

The TLV1117 product line delivers cost-optimized, high-reliability linear regulators for industrial, consumer, and computing applications - engineered for robust thermal performance, precise output accuracy, and fault resilience in space-constrained PCB layouts.

FAQ

What is the minimum input voltage required for TLV1117-25IDRJR to maintain regulation at full 800 mA load?

The TLV1117-25IDRJR requires a minimum input voltage of 3.9 V under recommended operating conditions. At 800 mA load, its maximum dropout voltage is 1.2 V (legacy) or 0.8 V (new chip), so 3.3 V input would cause dropout. The 3.9 V minimum ensures regulation across the full industrial temperature range and load spectrum. This value is explicitly listed in Section 5.3 of the TI datasheet SLVS561O.

Does TLV1117-25IDRJR require an external capacitor on the ADJ pin?

No - TLV1117-25IDRJR is a fixed-output variant, so Pin 1 (ADJ/GND) is internally connected to ground and must be externally tied to PCB ground. There is no ADJ pin functionality or external resistor divider; therefore, no capacitor is needed or used on that terminal. This differs from adjustable TLV1117 versions, which require a resistive divider between VOUT and ADJ.

What thermal derating applies to TLV1117-25IDRJR in a standard 2-layer PCB layout?

In a standard 2-layer board with 1 in² of 2-oz copper connected to the SOT-223 thermal pad, TLV1117-25IDRJR's effective R_θJA improves from 95.4°C/W (JEDEC standard) to ~65°C/W. At 800 mA and 12 V input, power dissipation is ~7.6 W, resulting in ~495°C rise - exceeding safe limits. Derating to ≤300 mA is recommended unless using 4-layer boards with internal ground planes and thermal vias.

Can TLV1117-25IDRJR be used in parallel to increase output current?

No - TLV1117-25IDRJR is not designed for parallel operation. Its output voltage tolerance (±1.0%) and load regulation (≤10 mV over 0–800 mA) make current sharing unstable without external ballasting resistors or active current-balancing circuitry. TI does not characterize or recommend paralleling; instead, use a single higher-current LDO or switcher for >800 mA requirements.

Is the TLV1117-25IDRJR RoHS-compliant and lead-free?

Yes - TLV1117-25IDRJR is RoHS-compliant and lead-free, as confirmed by Texas Instruments' official packaging and environmental documentation (SLVS561O, page 30). The SOT-223 (DCY) package uses matte tin lead finish, meets JEDEC J-STD-020 moisture sensitivity level 3, and carries TI's standard green marking for halogen-free and Pb-free compliance.