Toshiba Semiconductor and Storage TCR2LE21,LM(CT

Overview

TCR2LE21,LM(CT) from Toshiba is a 2.1 V fixed-output, 200 mA CMOS low-dropout regulator in ESV (SOT-553) package, featuring ultra-low 2 μA max quiescent current, 270 mV typical dropout at 150 mA, ±1.0% output accuracy, overcurrent protection, and auto-discharge functionality - designed for power management in space-constrained portable electronics.

For engineers reviewing the TCR2LE21,LM(CT) datasheet, TCR2LE21,LM(CT) pinout, TCR2LE21,LM(CT) application, or TCR2LE21,LM(CT) equivalent, key selection criteria include low-I_Q operation under light load, ceramic capacitor compatibility (0.1 μF input/output), on/off control interface, thermal performance in SOT-553, and dropout behavior across 1.5–5.5 V input range.

Technical Context

The TCR2LE21,LM(CT) implements a CMOS-based LDO architecture with integrated P-channel pass transistor, enabling low dropout voltage and minimal bias current. Its CONTROL pin accepts TTL-compatible logic levels (ON: 1.0–5.5 V; OFF: 0–0.4 V) to enable/disable regulation and activate auto-discharge via internal 20 Ω discharge path.

It operates across −40°C to +85°C ambient temperature with guaranteed output accuracy of ±1.0% for V_OUT ≥ 1.8 V, and supports stable regulation using only 0.1 μF ceramic capacitors on both input and output - eliminating need for tantalum or electrolytic types.

Key Specifications

Pinout & Package

TCR2LE21,LM(CT) uses the ESV (SOT-553) package: 1.6 mm × 1.6 mm × 0.55 mm, 5-pin surface-mount, with exposed pad not electrically connected. Pin 1 = VOUT, Pin 2 = GND, Pin 3 = CONTROL, Pin 4 = NC, Pin 5 = VIN (top view).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCR2LE21,LM(CT), TCS2121A-2.1V offers +100 mA drive but occupies >3× more board area and lacks auto-discharge; MCP1703T-2102E/MB matches I_Q but doubles dropout voltage and omits discharge - making TCR2LE21,LM(CT) optimal for ultra-compact, battery-critical designs requiring fast shutdown decay.

Availability

TCR2LE21,LM(CT) is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth LE sensor nodes, industrial wireless transmitters, and portable medical diagnostic devices requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for TCR2LE21,LM(CT) 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-reliability semiconductor solutions for consumer, industrial, and automotive markets, with emphasis on energy efficiency and miniaturization.

The TCR2LE series belongs to Toshiba's ultra-low-I_Q CMOS LDO family, engineered specifically for battery-powered portable electronics where extended runtime, minimal footprint, and rapid enable/disable response are critical.

FAQ

What is the maximum input voltage rating for TCR2LE21,LM(CT)?

The absolute maximum input voltage for TCR2LE21,LM(CT) is 6.0 V. However, the recommended operating range is 1.5 V to 5.5 V per electrical characteristics testing conditions. Exceeding 5.5 V may compromise long-term reliability even if within absolute maximum ratings - always maintain VIN ≤ 5.5 V in normal operation to ensure specified performance and lifetime of the TCR2LE21,LM(CT).

Does TCR2LE21,LM(CT) require an external pull-down resistor on the CONTROL pin?

No, TCR2LE21,LM(CT) integrates an internal pull-down connection between CONTROL and GND, eliminating need for external components. The CONTROL pin draws only 0.1 μA typical standby current when held low, and the internal structure ensures defined OFF-state behavior without external biasing - simplifying design and reducing BOM count for the TCR2LE21,LM(CT).

Can TCR2LE21,LM(CT) operate stably with only 0.1 μF ceramic capacitors?

Yes, TCR2LE21,LM(CT) is fully characterized and guaranteed stable with 0.1 μF ceramic input and output capacitors (X5R/X7R, ESR <10 Ω). This is a key design feature confirmed in Toshiba's application notes and electrical test data - enabling high-density layouts and removing dependency on larger, less reliable capacitor types for the TCR2LE21,LM(CT).

What is the dropout voltage of TCR2LE21,LM(CT) at 200 mA load?

At 200 mA output current, the dropout voltage of TCR2LE21,LM(CT) is not explicitly specified in the datasheet; however, the rated 270 mV typical value applies at 150 mA. Based on the dropout vs. I_OUT curve for 2.0–2.5 V outputs, dropout rises to approximately 320 mV at 200 mA - meaning minimum input voltage must be ≥2.42 V to sustain 2.1 V output under full load for the TCR2LE21,LM(CT).

Is the NC pin on TCR2LE21,LM(CT) electrically connected internally?

No, the NC (Pin 4) on TCR2LE21,LM(CT) is not connected to any internal circuitry. It is a no-connect terminal per Toshiba's pin assignment diagram and package documentation. While it may be left floating, grounding Pin 4 is acceptable and often recommended in high-noise environments to reduce potential coupling - but it has no functional impact on regulation or performance of the TCR2LE21,LM(CT).