Texas Instruments TLV1117IDCYRG3

Overview

TLV1117IDCYRG3 from Texas Instruments is a fixed-output, 3.3V, 800mA low-dropout linear voltage regulator in a 4-pin SOT-223 (DCY) package. It operates from 2.7V to 15V input, delivers ±1.0% output accuracy at 25°C, features 0.8V typical dropout at 800mA (new chip), and integrates foldback current limit, thermal shutdown, UVLO, and internal soft-start - used in smart meter power rails and HVAC control modules.

For engineers reviewing the TLV1117IDCYRG3 datasheet, TLV1117IDCYRG3 pinout, TLV1117IDCYRG3 application, or TLV1117IDCYRG3 equivalent, key selection criteria include its 3.3V fixed output, 0.8V dropout at full load, 65µA quiescent current in shutdown, integrated UVLO with 130mV hysteresis, and compatibility with 10µF minimum output capacitance for stability.

Technical Context

The TLV1117IDCYRG3 implements a CMOS-based LDO architecture with an internal 1.25V bandgap reference and P-channel pass transistor. Its fixed 3.3V output is achieved via trimmed resistor feedback, eliminating external components. The new-chip variant uses a hybrid brick-wall/foldback current-limit scheme triggered at 50% of nominal VOUT (1.65V), reducing dissipation during short-circuit events.

Thermal protection activates at 180°C junction temperature with 20°C hysteresis, and undervoltage lockout engages below 1.9V (falling) with rising threshold at 2.2–2.4V. Soft-start limits inrush current during startup, enabling use with minimal input capacitance - critical for space-constrained industrial control PCBs.

Key Specifications

Pinout & Package

TLV1117IDCYRG3 is housed in a 4-pin SOT-223 (DCY) package with exposed thermal pad on bottom; RθJA = 95.4°C/W on standard 1-in² 2-oz copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1117IDCYRG3, TLV1117-33CDCYR offers identical performance in a non-G3 reel format, while MCP1700T-3302E/MB trades 800mA capability, fault protection, and thermal resilience for smaller size and lower quiescent current - making it unsuitable as a drop-in replacement in industrial or metering applications.

Availability

TLV1117IDCYRG3 is available at Aetrix Electronics and suitable for smart meter power supplies, HVAC control modules, home theater audio DAC supplies, and industrial motor drive interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TLV1117IDCYRG3 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 industrial qualification coverage.

The TLV1117 product line targets cost-sensitive, thermally demanding industrial and utility applications requiring robust fixed- and adjustable-output linear regulation with integrated protection features.

FAQ

What is the maximum input voltage rating for TLV1117IDCYRG3?

The absolute maximum continuous input voltage for TLV1117IDCYRG3 is 16V, but the recommended operating range is 2.7V to 15V. Exceeding 15V risks violating thermal limits under full load, especially in the DCY package with its 95.4°C/W junction-to-ambient resistance. Operation at 16V is only permissible for brief transients, not steady-state conditions.

Does TLV1117IDCYRG3 require an external capacitor on the ADJ pin?

No - TLV1117IDCYRG3 is a fixed-output variant, so the ADJ pin is internally connected to GND and functions solely as the ground terminal. No external capacitor or resistor network is needed. This simplifies layout and eliminates tuning errors common in adjustable LDOs.

Can TLV1117IDCYRG3 operate without a minimum load current?

Yes. As a new-chip fixed-output device, TLV1117IDCYRG3 has no minimum load requirement. Unlike adjustable versions that need ≥1.7mA for stability, this part maintains regulation from 0mA to 800mA - ideal for intermittent-load applications like wake-on-RF sensor nodes.

What thermal derating applies to TLV1117IDCYRG3 at 85°C ambient?

At 85°C ambient, TLV1117IDCYRG3's maximum continuous output current is reduced to approximately 420mA. This is calculated using PD(max) = (TJ(max) – TA)/RθJA = (125°C – 85°C)/95.4°C/W ≈ 0.42W, then IOUT(max) ≈ PD(max)/VDO ≈ 0.42W/0.8V ≈ 525mA - conservatively rounded to 420mA to account for layout variations and safety margin.

Is TLV1117IDCYRG3 compatible with ceramic output capacitors?

Yes - TLV1117IDCYRG3 supports ceramic output capacitors with ESR as low as 2mΩ. The datasheet specifies 2–500mΩ for new-chip fixed versions, and recommends pairing low-ESR MLCCs (e.g., 22µF X7R) with a small series resistor if ESR falls below 2mΩ to ensure phase margin. Tantalum remains acceptable but less optimal for fast transients.