Toshiba Semiconductor and Storage TCR2LN11,LF

Overview

TCR2LN11,LF from Toshiba Electronic Devices & Storage Corporation is a fixed-output 1.1 V CMOS low dropout (LDO) voltage regulator with on/off control input, ultra-low 2 μA quiescent current (max), 200 mA output capability, and 760 mV typical dropout voltage at 150 mA load - designed for power management in space-constrained portable electronics.

For engineers reviewing the TCR2LN11,LF datasheet, TCR2LN11,LF pinout, TCR2LN11,LF application, or TCR2LN11,LF equivalent, this device is selected for battery-powered systems requiring high accuracy (±1.0 % for ≥1.8 V outputs; ±18 mV for 1.1 V), ceramic capacitor compatibility (0.1 μF input/output), auto-discharge functionality, and operation across −40 to +85 °C ambient temperature.

Technical Context

The TCR2LN11,LF integrates a CMOS pass transistor with internal overcurrent protection and an active pull-down circuit on the CONTROL pin (0.1 μA max pull-down current). Its regulation architecture supports stable operation with minimal external components: only two 0.1 μF ceramic capacitors are required for input and output filtering.

It operates across an input voltage range of 1.5–5.5 V, delivers 1.1 V output with ±18 mV accuracy (−40 to +85 °C), and maintains line regulation ≤15 mV and load regulation ≤30 mV under specified conditions - enabling reliable biasing of low-voltage logic, sensors, and RF subsystems in compact designs.

Key Specifications

Pinout & Package

TCR2LN11,LF is housed in the ultra-compact SDFN4 plastic mold package (0.8 mm × 0.8 mm × 0.38 mm, 0.6 mg typical weight), with exposed center pad intended for GND connection or left floating per layout requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCR2LN11,LF, the XC6219B112MR-G offers lower quiescent current but sacrifices miniaturization, while the BD3572EFJ-ME2 provides greater current headroom and thermal robustness at the expense of footprint - making TCR2LN11,LF optimal for space- and battery-life-critical portable designs.

Availability

TCR2LN11,LF is available at Aetrix Electronics and suitable for wearable health monitors, BLE sensor nodes, smart hearing aids, and industrial handheld scanners requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TCR2LN11,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 discrete semiconductors, power devices, and analog ICs for industrial, automotive, and consumer applications.

The TCR2LN series was developed specifically for ultra-low-power portable electronics, emphasizing miniature packaging, nanoscale quiescent current, and ceramic capacitor compatibility to enable next-generation compact battery-powered systems.

FAQ

What is the output voltage tolerance of TCR2LN11,LF over temperature?

The TCR2LN11,LF has an output voltage tolerance of ±18 mV across the full operating temperature range of −40 to +85 °C. This specification is confirmed in the Electrical Characteristics table (Page 4) under "Output voltage" for VOUT < 1.8 V, and applies directly to the TCR2LN11,LF's 1.1 V output. The value reflects absolute deviation, not percentage, due to its sub-1.8 V rating - ensuring predictable biasing for low-voltage logic without additional calibration.

Does TCR2LN11,LF require external resistors for output voltage setting?

No, TCR2LN11,LF does not require external resistors. It is a fixed-output LDO with factory-trimmed 1.1 V regulation, as confirmed in the "List of Products Number, Output voltage and Marking" table (Page 3), where TCR2LN11 maps to 1.1 V and marking "L2". The device uses internal feedback networks, eliminating resistor placement, trimming, or associated board area - simplifying design and improving long-term stability.

Can TCR2LN11,LF operate with input voltages below 1.8 V?

Yes, TCR2LN11,LF supports input voltages as low as 1.5 V, per the Absolute Maximum Ratings table (Page 2) and Electrical Characteristics (Page 4). With a 1.1 V output and 760 mV typical dropout, it remains functional down to VIN = 1.86 V at 150 mA load. At lighter loads, dropout decreases further - enabling operation from partially discharged single-cell batteries such as LiFePO₄ (nominal 3.2 V, cutoff ~2.5 V) or alkaline (1.5 V/cell, usable down to ~1.1 V under light load).

What is the purpose of the center electrode on the SDFN4 package of TCR2LN11,LF?

The center electrode on the SDFN4 package of TCR2LN11,LF is an exposed thermal pad intended for connection to the PCB ground plane to enhance thermal dissipation and electrical stability. As shown in the Pin Assignment diagram (Page 2), it is labeled "*Center electrode should be connected to GND or Open". While functional operation is maintained if left open, grounding this pad improves power handling (up to 300 mW rating) and reduces junction temperature rise - critical for sustained 200 mA operation in confined spaces.

How does the auto-discharge feature of TCR2LN11,LF behave during shutdown?

When the CONTROL pin of TCR2LN11,LF is driven LOW (≤0.4 V), the internal auto-discharge circuit activates a 20 Ω discharge path between VOUT and GND, as specified in the Electrical Characteristics table (Page 4) under "Discharge on resistance RSD". This rapidly depletes stored charge on the output capacitor - reducing VOUT to <100 mV within ~1 ms for a 0.1 μF capacitor - preventing unintended wake-up of downstream circuitry and ensuring clean power sequencing in battery-powered systems.