Toshiba Semiconductor and Storage TCR2LE19,LM(CT

Overview

TCR2LE19,LM(CT) from Toshiba is a 1.9 V fixed-output, 200 mA CMOS low-dropout (LDO) voltage 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 (for VOUT ≥ 1.8 V), overcurrent protection, and auto-discharge function-designed for power-sensitive portable electronics such as cellular phone baseband ICs and wearable sensor nodes.

For engineers reviewing the TCR2LE19,LM(CT) datasheet, TCR2LE19,LM(CT) pinout, TCR2LE19,LM(CT) application, or TCR2LE19,LM(CT) equivalent, key selection criteria include guaranteed 1.9 V output stability under 150 mA load, compatibility with 0.1 μF ceramic input/output capacitors, thermal performance on FR4 boards (30 mm × 30 mm × 0.8 mm), and control-pin logic thresholds (VCT(OFF) ≤ 0.4 V, VCT(ON) ≥ 1.0 V).

Technical Context

The TCR2LE19,LM(CT) implements a CMOS-based LDO architecture with integrated on/off control input and internal auto-discharge circuitry tied to the CONTROL pin. Its low 270 mV dropout at 150 mA enables operation from input voltages as low as 2.17 V while maintaining regulated 1.9 V output.

It features active pull-down on the CONTROL pin (ICT = 0.1 μA typ.), supports stable regulation with 0.1 μF ceramic capacitors on both VIN and VOUT, and delivers ±1.0% output voltage accuracy across −40°C to +85°C ambient temperature for VOUT = 1.9 V.

Key Specifications

Pinout & Package

TCR2LE19,LM(CT) uses the ESV (SOT-553) package: 1.6 mm × 1.6 mm × 0.55 mm, 5-pin surface-mount, weight 3.0 mg (typ.). Pin assignment is standardized per Toshiba top-view layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCR2LE19,LM(CT), TCS2117-1900 trades 0.5 μA higher quiescent current for broader long-term reliability data, while MCP1700T-1902E/TT offers pin-compatible legacy support at the cost of 330 mV higher dropout and 3× larger PCB footprint-making TCR2LE19,LM(CT) optimal for next-gen miniaturized, battery-critical designs.

Availability

TCR2LE19,LM(CT) is available at Aetrix Electronics and suitable for smartphone baseband power, wearable health sensor nodes, and industrial wireless sensor transmitters requiring stable component supply, full traceability, and lifecycle continuity assurance.

Supply support for TCR2LE19,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 targets ultra-low-power portable electronics, delivering CMOS LDO performance in sub-2 mm² packages to meet stringent size and battery-life requirements of modern mobile and wearable devices.

FAQ

What is the guaranteed output voltage tolerance for TCR2LE19,LM(CT) across temperature?

The TCR2LE19,LM(CT) guarantees ±1.0% output voltage accuracy for VOUT = 1.9 V over the full operating temperature range of −40°C to +85°C. This specification is explicitly confirmed in the Electrical Characteristics table under "Output voltage accuracy" for 1.8 V ≤ VOUT, with no derating required across the specified junction temperature range. The TCR2LE19,LM(CT) achieves this via laser-trimmed internal feedback resistors and process-matched CMOS pass elements.

Can TCR2LE19,LM(CT) operate with a 2.0 V input supply?

No-TCR2LE19,LM(CT) requires a minimum input voltage of 2.17 V to maintain regulation at 150 mA load, based on its 270 mV typical dropout voltage (VIN − VOUT). At 2.0 V input, the device enters dropout and cannot sustain 1.9 V output. The Absolute Maximum Ratings specify VIN ≥ 1.5 V, but functional regulation requires VIN ≥ (VOUT + dropout), and the datasheet confirms stable operation only when VIN ≥ VOUT + 0.3 V under typical conditions. For 1.9 V output, 2.2 V is the practical minimum.

Does TCR2LE19,LM(CT) require an external pull-up resistor on the CONTROL pin?

No-TCR2LE19,LM(CT) integrates an internal pull-down on the CONTROL pin (ICT = 0.1 μA typ.), so no external pull-up is needed. When left floating, the CONTROL pin defaults to LOW, disabling the regulator. To enable operation, drive CONTROL to ≥1.0 V using a GPIO or open-drain driver; the internal pull-down ensures defined OFF-state behavior without external components. This simplifies PCB layout and reduces BOM count.

What is the maximum allowable power dissipation for TCR2LE19,LM(CT) on a standard FR4 board?

When mounted on a 30 mm × 30 mm × 0.8 mm FR4 board (per Note 3 in Absolute Maximum Ratings), the TCR2LE19,LM(CT) has a maximum board-mounted power dissipation rating of 320 mW. Exceeding this limit risks junction temperature exceeding 150°C. Derating is required above 25°C ambient: the PD–Ta curve shows usable dissipation drops to ~200 mW at 60°C ambient. Thermal design must ensure copper area ≥20 mm² under the ESV package for reliable operation.

Is the NC pin on TCR2LE19,LM(CT) safe to connect to ground or leave unpopulated?

The NC (No Connect) pin on TCR2LE19,LM(CT) must remain electrically floating-neither grounded nor connected to any net. It is internally unconnected and not bonded. Soldering it to ground or routing traces to it may cause unpredictable leakage paths or mechanical stress on the die bond wire. Per Toshiba's Package Dimensions and Pin Assignment documentation, the NC pin is explicitly marked "no connection" and must be left unpopulated and unconnected in layout and assembly. Violation risks parametric shift or early failure.