Toshiba Semiconductor and Storage TCR2LN105,LF(SE

Overview

TCR2LN105,LF(SE) from Toshiba Electronic Devices & Storage Corporation is a CMOS low-dropout linear voltage regulator delivering fixed 1.05 V output at up to 200 mA, featuring ultra-low 2 μA (max) quiescent current, 840 mV typical dropout at 150 mA load, and operation across −40°C to +85°C ambient. It integrates on/off control input, overcurrent protection, and auto-discharge functionality, and is optimized for space-constrained portable electronics such as cellular phone baseband IC power rails.

For engineers reviewing the TCR2LN105,LF(SE) datasheet, TCR2LN105,LF(SE) pinout, TCR2LN105,LF(SE) application, or TCR2LN105,LF(SE) equivalent, key selection criteria include its SDFN4 ultra-small package (0.8 mm × 0.8 mm), ±1.0% output accuracy (for VOUT ≥ 1.8 V; 1.05 V variant specified at ±18 mV), ceramic capacitor compatibility (0.1 μF input/output), and control logic thresholds (VCT(OFF) ≤ 0.4 V, VCT(ON) ≥ 1.0 V).

Technical Context

The TCR2LN105,LF(SE) implements a CMOS-based LDO architecture with internal P-channel pass transistor, enabling low dropout and minimal quiescent current across wide temperature range. Its control input enables active-low enable/disable with integrated pull-down (0.1 μA max ICT), and auto-discharge path (20 Ω typical RSD) ensures rapid output discharge when disabled.

Designed for high-density portable systems, it operates with VIN from 1.5 V to 6.0 V and supports stable regulation using only 0.1 μF ceramic capacitors on both input and output. The device maintains ±18 mV output voltage accuracy at 1.05 V under 50 mA load and 25°C junction temperature, with line regulation of ≤15 mV and load regulation ≤30 mV across full operating conditions.

Key Specifications

Pinout & Package

TCR2LN105,LF(SE) uses the SDFN4 ultra-small plastic mold package (0.8 mm × 0.8 mm × 0.38 mm, 0.6 mg typical weight), with exposed center thermal pad recommended to be connected to GND for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R1172L105B-TR-FE and MCP1703T-105I/OT, the TCR2LN105,LF(SE) uniquely combines ultra-small SDFN4 size, integrated auto-discharge, and sub-2 μA quiescent current-making it optimal for miniaturized, battery-sensitive designs where board area and standby power are primary constraints.

Availability

TCR2LN105,LF(SE) is available at Aetrix Electronics and suitable for portable medical devices, wearable electronics, cellular IoT modules, and ultra-compact consumer gadgets requiring stable component supply with guaranteed long-term sourcing.

Supply support for TCR2LN105,LF(SE) 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, miniaturized semiconductor components for consumer, industrial, and automotive markets, with emphasis on power management and analog integration.

The TCR2LN series targets ultra-low-power portable electronics, delivering CMOS LDO regulators optimized for minimal board footprint, battery longevity, and seamless integration with modern low-voltage SoCs and sensors.

FAQ

What is the output voltage tolerance of TCR2LN105,LF(SE) at room temperature?

The TCR2LN105,LF(SE) has an output voltage tolerance of ±18 mV at Tj = 25°C and IOUT = 50 mA, corresponding to ±1.71% of its nominal 1.05 V output. This specification is confirmed in the Electrical Characteristics table (page 4) under "Output voltage" test condition for VOUT < 1.8 V. The tighter ±1.0% tolerance applies only to variants with VOUT ≥ 1.8 V.

Does TCR2LN105,LF(SE) require external components for stable operation?

Yes - the TCR2LN105,LF(SE) requires 0.1 μF ceramic capacitors on both VIN and VOUT pins, placed as close as possible to the device. Per Application Note (page 5), these capacitors ensure stability and transient response; Toshiba recommends ESR < 10 Ω. No additional compensation network or bypass resistors are needed due to internal design optimization.

How does the CONTROL pin function on TCR2LN105,LF(SE)?

The CONTROL pin on TCR2LN105,LF(SE) is an active-low enable input with internal 0.1 μA pull-down. When pulled to ≤0.4 V, the regulator shuts down and activates the auto-discharge path (RSD ≈ 20 Ω). When held ≥1.0 V, regulation resumes. No external pull-up is required, simplifying GPIO interfacing in battery-powered systems.

What is the maximum allowable power dissipation for TCR2LN105,LF(SE) on a standard FR4 board?

TCR2LN105,LF(SE) has a maximum power dissipation (PD) rating of 300 mW when mounted on a defined FR4 test board (40 mm × 40 mm, 1.6 mm thickness, 50% copper coverage per side). This value assumes proper thermal connection of the center pad to GND. Actual usable PD must be derated based on ambient temperature and layout - e.g., at 85°C ambient, usable PD drops to ~120 mW per the thermal curve (page 5).

Is TCR2LN105,LF(SE) RoHS compliant and halogen-free?

Yes - TCR2LN105,LF(SE) meets EU RoHS Directive requirements and is halogen-free, as confirmed in Toshiba's official product documentation and environmental compliance statements. The "LF" suffix in the part number explicitly denotes lead-free and RoHS-compliant packaging; full material declarations are available upon request from Toshiba's sales representatives.