Toshiba Semiconductor and Storage TCR2LN33,LF

Overview

TCR2LN33,LF from Toshiba Electronic Devices & Storage Corporation is a fixed-output 3.3 V, 200 mA CMOS low dropout (LDO) regulator in an ultra-small SDFN4 package (0.8 mm × 0.8 mm × 0.38 mm), featuring 2 μA max quiescent current, 200 mV typical dropout at 150 mA, ±1.0% output accuracy (≥1.8 V), overcurrent protection, and auto-discharge functionality - designed for power management in space-constrained portable electronics such as cellular phones and wearables.

For engineers reviewing the TCR2LN33,LF datasheet, TCR2LN33,LF pinout, TCR2LN33,LF application, or TCR2LN33,LF equivalent, this page delivers verified electrical parameters, validated package and terminal mapping, confirmed alternative options with functional distinctions, and real-world use context for battery-powered, high-density PCB designs requiring ultra-low standby power and stable low-voltage rail generation.

Technical Context

The TCR2LN33,LF integrates a CMOS pass transistor with on/off control logic and internal auto-discharge circuitry tied to the CONTROL pin. Its low 2 μA quiescent current enables multi-year battery life in always-on sensor nodes, while the 200 mV dropout at 150 mA supports operation down to VIN = 3.5 V under full load - critical for Li-ion or coin-cell systems where input voltage sags near end-of-life.

It uses ceramic capacitors (0.1 μF input/output) without ESR requirements, eliminating bulkier tantalum alternatives. The pull-down connection between CONTROL and GND ensures defined OFF-state behavior, and overcurrent protection activates at ~250 mA with foldback characteristics to limit thermal stress during short-circuit events.

Key Specifications

Pinout & Package

TCR2LN33,LF is housed in the ultra-compact SDFN4 plastic mold package (0.8 mm × 0.8 mm × 0.38 mm), with exposed center pad recommended for grounding to enhance thermal performance and noise immunity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCR2LN33,LF, the XC6219B332MR-G offers lower quiescent current but lacks auto-discharge and occupies 9× more PCB area, while the BD33IC0WEFJ-C adds thermal shutdown at the cost of 17× higher IQ - making TCR2LN33,LF optimal for miniaturized, battery-sensitive designs where rapid VOUT collapse and minimal footprint are mandatory.

Availability

TCR2LN33,LF is available at Aetrix Electronics and suitable for wireless sensor nodes, wearable health monitors, smart card readers, and industrial handheld scanners requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for TCR2LN33,LF 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

Toshiba Electronic Devices & Storage Corporation designs and manufactures high-efficiency, miniature semiconductor components for consumer, industrial, and automotive applications, with emphasis on power management, logic, and analog integration.

The TCR2LN series targets ultra-portable and energy-harvesting systems, delivering CMOS-based LDO regulators optimized for sub-μA standby operation, minimal board area, and seamless integration with ceramic capacitors - addressing design constraints in next-generation IoT endpoints.

FAQ

What is the maximum input voltage rating for TCR2LN33,LF?

The TCR2LN33,LF has an absolute maximum input voltage (VIN) rating of 6.0 V. However, its recommended operating range is 1.5 V to 5.5 V per electrical characteristics testing conditions. Exceeding 5.5 V may compromise reliability or trigger overvoltage stress, especially at elevated junction temperatures. Always maintain VIN ≤ 5.5 V in normal operation to ensure compliance with specified dropout, accuracy, and thermal performance of the TCR2LN33,LF.

Does TCR2LN33,LF require external resistors for output voltage setting?

No, the TCR2LN33,LF is a fixed-output regulator with factory-trimmed 3.3 V output - no external feedback resistors are needed or supported. Its output voltage is internally set and guaranteed within ±1.0% tolerance for 3.3 V models, eliminating layout complexity and component count. This simplifies design validation and improves long-term stability compared to adjustable LDOs where resistor drift affects regulation accuracy of the TCR2LN33,LF.

How does the auto-discharge feature work in TCR2LN33,LF?

When the CONTROL pin is driven LOW or left floating (due to internal pull-down), the TCR2LN33,LF activates an internal discharge switch (RSD ≈ 20 Ω) between VOUT and GND, collapsing the output voltage within microseconds. This prevents residual charge from holding downstream circuitry in undefined states - critical for clean power sequencing in microcontrollers and RF ICs. The feature is intrinsic to the TCR2LN33,LF and requires no external components.

Can TCR2LN33,LF operate with input voltage below 3.3 V?

Yes, the TCR2LN33,LF can regulate down to VIN = VOUT + VDO, where VDO is 200 mV typical at 150 mA. Thus, it maintains regulation with VIN as low as 3.5 V under full load. At lighter loads (e.g., 1 mA), dropout drops further - enabling operation with VIN = 3.35 V. Below dropout, the device enters pass-through mode; regulation ceases, but the TCR2LN33,LF remains functional and safe within absolute maximum ratings.

What is the thermal performance of TCR2LN33,LF on a standard FR4 PCB?

On a 40 mm × 40 mm, two-layer FR4 board (50% copper coverage per side), the TCR2LN33,LF has a power dissipation rating of 300 mW at 25°C ambient. Its thermal resistance θJA is approximately 417°C/W, meaning a 100 mW load raises junction temperature by ~42°C above ambient. For continuous 200 mA output at 3.3 V with 2 V dropout, derating is essential - the TCR2LN33,LF should be used below 70% of max PD in enclosed or high-Ta environments.