Microchip Technology TC1017R-1.8VLTTR

Overview

TC1017R-1.8VLTTR from Microchip Technology is a 150 mA, fixed-output CMOS low-dropout (LDO) voltage regulator in SC-70 package, delivering ±0.5% output accuracy at 1.8 V with 285 mV typical dropout at 150 mA load and 53 µA typical quiescent current-designed for battery-powered medical instruments and portable computing systems.

For engineers reviewing the TC1017R-1.8VLTTR datasheet, TC1017R-1.8VLTTR pinout, TC1017R-1.8VLTTR application, or TC1017R-1.8VLTTR equivalent, key selection criteria include shutdown current (0.05 µA typ), ceramic capacitor compatibility (1 µF min), wake-up time (10 µs typ), thermal shutdown threshold (160°C), and SC-70 footprint constraints.

Technical Context

The TC1017R-1.8VLTTR uses a P-channel MOSFET pass element with internal bandgap reference and error amplifier feedback, enabling stable regulation across 2.7–6.0 V input and 0–150 mA load. Its architecture supports fast transient response (32 µs settling time) and integrates overcurrent limiting (120 mA typ during short-circuit) and thermal shutdown (160°C trip, 10°C hysteresis).

It operates with minimal external components: only 1 µF ceramic output capacitor required for stability, and no ESR constraints beyond 0–2 Ω. Input voltage must satisfy VIN ≥ (1.8 V × 1.025) + VDROPOUT and VIN ≥ 2.7 V-ensuring regulation under worst-case dropout and line conditions.

Key Specifications

Pinout & Package

TC1017R-1.8VLTTR is supplied in a 5-pin SC-70 package (1.6 mm × 1.6 mm × 0.9 mm), optimized for space-constrained portable electronics. Pin 2 is NC (no connect); all other pins are electrically functional and thermally critical.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1802E/TT and TPS78218DRVR, TC1017R-1.8VLTTR uniquely balances 10 µs wake-up, 1 µF ceramic stability, and ±0.5% accuracy in SC-70-making it optimal for portable systems demanding both rapid responsiveness and minimal footprint.

Availability

TC1017R-1.8VLTTR is available at Aetrix Electronics and suitable for medical instrumentation, portable computing, cellular subsystems, and electronic games requiring stable component supply with long-term manufacturability and consistent parametric performance.

Supply support for TC1017R-1.8VLTTR 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

Microchip Technology Inc. is a leading provider of microcontrollers, analog devices, and power management ICs, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The TC1017 family was developed specifically for battery-powered systems requiring ultra-low quiescent current, fast wake-up, and small-footprint LDO regulation-targeting portable, medical, and consumer electronics where efficiency and board space are critical.

FAQ

What is the maximum input voltage rating for TC1017R-1.8VLTTR?

The absolute maximum input voltage for TC1017R-1.8VLTTR is 6.0 V. Operation above this level risks permanent damage. The recommended operating range is 2.7 V to 6.0 V, with minimum input determined by both dropout and output accuracy constraints: VIN must be ≥ (1.8 V × 1.025) + VDROPOUT and ≥ 2.7 V. At 150 mA load, VDROPOUT is typically 285 mV, so minimum VIN ≈ 2.085 V + 0.285 V = 2.37 V-but 2.7 V is the hard lower limit per specification.

Does TC1017R-1.8VLTTR require an input capacitor, and if so, what value is recommended?

Yes, TC1017R-1.8VLTTR requires an input capacitor for stability, especially when powered from high-impedance sources like batteries or long PCB traces. A minimum of 0.1 µF ceramic capacitor is recommended, placed as close as possible to the VIN pin. For improved noise rejection and transient response-particularly in portable systems-1 µF X7R/X5R ceramic is commonly used. The datasheet confirms that larger values further reduce input impedance and high-frequency noise without compromising stability.

Can TC1017R-1.8VLTTR be used with tantalum or aluminum electrolytic output capacitors?

TC1017R-1.8VLTTR supports ceramic, tantalum, and aluminum electrolytic output capacitors, provided ESR stays within 0–2 Ω. However, ceramic (X7R/X5R) is strongly recommended: it meets the 1 µF minimum requirement with low ESR (~50 mΩ), performs reliably across –40°C to +125°C, and avoids freezing issues below –25°C seen in many aluminum electrolytics. Tantalum is acceptable but carries surge-current and failure-mode risks not present with ceramics-so TC1017R-1.8VLTTR designs prioritize ceramic for robustness and consistency.

What is the thermal shutdown behavior of TC1017R-1.8VLTTR, and how does it recover?

TC1017R-1.8VLTTR initiates thermal shutdown when junction temperature reaches ~160°C (typical), turning off the P-channel MOSFET to halt power dissipation. Recovery occurs when die temperature falls to ~150°C (10°C hysteresis), at which point regulation resumes automatically. This cycle prevents permanent damage but is not intended for continuous operation-designers must ensure steady-state power dissipation (calculated as (VIN – 1.8 V) × I_LOAD) stays within limits defined by ambient temperature and package thermal resistance (θ_JA = 450°C/W for SC-70).

Is TC1017R-1.8VLTTR pin-compatible with standard SOT-23 LDOs such as the LM1117?

No, TC1017R-1.8VLTTR is not pin-compatible with LM1117 or other 3-pin SOT-23 LDOs. It uses a 5-pin SC-70 package with dedicated SHDN and NC pins-pinout differs fundamentally from LM1117's VIN-GND-VOUT arrangement. Even its 5-pin SOT-23 variant (TC1017-1.8VCT) uses non-standard pin mapping (e.g., SHDN on pin 3, not shared with GND). Direct replacement requires PCB redesign; TC1017R-1.8VLTTR is intended as a drop-in upgrade for legacy bipolar regulators only when using matching SC-70 footprints and layout.