Texas Instruments TLV2217-33KCE3

Overview

TLV2217-33KCE3 from Texas Instruments is a fixed-output 3.3-V low-dropout linear regulator with ±1% output voltage tolerance at 25°C, 500-mA output current capability, and 500-mV maximum dropout voltage at full load-designed for stable power delivery in embedded microcontroller and DSP supply rails.

For engineers reviewing the TLV2217-33KCE3 datasheet, TLV2217-33KCE3 pinout, TLV2217-33KCE3 application, or TLV2217-33KCE3 equivalent, key selection criteria include dropout performance at 500 mA, thermal protection behavior under sustained load, output accuracy across −40°C to 125°C, and compatibility with 22-µF tantalum output capacitors per TI's stability guidelines.

Technical Context

The TLV2217-33KCE3 employs a PNP pass transistor architecture enabling low dropout operation while maintaining regulation down to VI = VO + 0.6 V. It integrates internal overcurrent limiting, thermal-overload shutdown, and overvoltage protection-no external components required for basic fault coverage.

Its control loop is optimized for stability with a 22-µF tantalum output capacitor (ESR ≈ 1.5 Ω), and ripple rejection reaches −62 dB at 120 Hz. Bias current ranges from 2 mA (no load) to 49 mA (500 mA load), supporting efficient light-load operation without compromising transient response.

Key Specifications

Pinout & Package

TLV2217-33KCE3 uses the TO-220 (KC) package: 3-pin through-hole, heat sink tab electrically connected to GND, with standard pin 1 = INPUT, pin 2 = GND, pin 3 = OUTPUT (top view).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2217-33KCE3, TLV2217-33KCSE3 offers identical performance with RoHS compliance, while TLS850F3TLE adds automotive qualification and lower dropout but introduces system-level control requirements and non-compatible enable functionality.

Availability

TLV2217-33KCE3 is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and test equipment requiring stable component supply with long-term continuity planning.

Supply support for TLV2217-33KCE3 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.

The TLV2217 family was designed for cost-sensitive, space-constrained applications needing reliable fixed-voltage regulation-particularly in industrial and consumer systems where simplicity, thermal robustness, and wide-input capability are critical.

FAQ

What is the maximum input voltage rating for TLV2217-33KCE3?

The TLV2217-33KCE3 has an absolute maximum continuous input voltage of 16 V, verified per its datasheet (SLVS067L). This allows safe operation in 12-V automotive or industrial bus environments with transient headroom. Exceeding 16 V risks permanent damage, even briefly.

Does TLV2217-33KCE3 require an external capacitor on the output?

Yes - TLV2217-33KCE3 requires a 22-µF tantalum output capacitor with ~1.5 Ω ESR for guaranteed stability, as specified in Figure 1 and Figure 2 of the SLVS067L datasheet. Using ceramic capacitors without series resistance may cause oscillation or poor transient response.

What thermal protection behavior does TLV2217-33KCE3 exhibit under overload?

TLV2217-33KCE3 features internal thermal-overload protection that shuts down the output when junction temperature exceeds ~150°C. It automatically resumes regulation once the die cools below the hysteresis threshold - no latch-up or manual reset required. This protects both the IC and downstream circuitry during sustained overloads.

Can TLV2217-33KCE3 be used with a 3.3-V input source?

No - TLV2217-33KCE3 requires minimum input voltage of VO + 0.6 V = 3.9 V under load. At 3.3-V input, it cannot maintain regulation. The recommended operating input range is 3.8 V to 12 V (per datasheet Section 6.3), with 16 V as absolute maximum.

Is TLV2217-33KCE3 pin-compatible with other TLV2217 variants?

Yes - all TLV2217 variants in the KC (TO-220) package share identical pinout: Pin 1 = INPUT, Pin 2 = GND, Pin 3 = OUTPUT. TLV2217-33KCE3 can replace TLV2217-25KC or TLV2217-18KC on the same PCB, provided input voltage and thermal design accommodate the specific output voltage's dropout and power dissipation.