Toshiba Semiconductor and Storage TCR2LN15,LF(SE

Overview

TCR2LN15,LF(SE) from Toshiba Electronic Devices & Storage Corporation is a 1.5 V fixed-output CMOS low dropout (LDO) voltage regulator with ultra-low quiescent current (2 μA max), 200 mA output capability, and SDFN4 package (0.8 mm × 0.8 mm × 0.38 mm). It features overcurrent protection, auto-discharge, and supports ceramic input/output capacitors as small as 0.1 μF - ideal for space-constrained portable electronics such as wearable sensors and Bluetooth LE modules.

For engineers reviewing the TCR2LN15,LF(SE) datasheet, TCR2LN15,LF(SE) pinout, TCR2LN15,LF(SE) application, or TCR2LN15,LF(SE) equivalent, key selection criteria include its 350 mV typical dropout at 150 mA (1.5 V output), ±1.0% output accuracy (for VOUT ≥ 1.8 V; note: 1.5 V falls under ±18 mV tolerance), -40°C to +85°C operating range, and on/off control interface enabling system-level power sequencing.

Technical Context

The TCR2LN15,LF(SE) implements a CMOS-based LDO architecture with integrated P-channel pass transistor, enabling low dropout and minimal quiescent current across load and temperature. Its control input accepts TTL-compatible logic levels (VCT(OFF) ≤ 0.4 V, VCT(ON) ≥ 1.0 V) and includes internal pull-down to GND.

It delivers stable regulation with only 0.1 μF ceramic capacitors on both input and output, leveraging internal compensation optimized for low-ESR ceramics. The device incorporates thermal shutdown and foldback overcurrent protection - not latch-off - and provides controlled discharge via internal 20 Ω switch when disabled.

Key Specifications

Pinout & Package

TCR2LN15,LF(SE) uses the ultra-compact SDFN4 package (0.8 mm × 0.8 mm × 0.38 mm, 0.6 mg weight), with exposed center pad recommended for GND connection to enhance thermal performance and EMI suppression.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R1190J151B-TR-FE and MCP1703T-1502E/MB, the TCR2LN15,LF(SE) uniquely balances 200 mA drive, 2 μA IQ, auto-discharge, and 0.8 mm² footprint - making it optimal for miniaturized, long-life wireless edge nodes where all four attributes are simultaneously required.

Availability

TCR2LN15,LF(SE) is available at Aetrix Electronics and suitable for wearable health sensors, Bluetooth Low Energy modules, and industrial wireless sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TCR2LN15,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 high-efficiency, miniaturized semiconductor solutions for power management, motor control, and analog signal conditioning.

The TCR2LN series was developed specifically for ultra-low-power portable electronics, emphasizing minimal quiescent current, tiny footprint, and ceramic capacitor compatibility to enable next-generation wearables and IoT endpoints.

FAQ

What is the output voltage tolerance of TCR2LN15,LF(SE) across temperature and load?

The TCR2LN15,LF(SE) specifies output voltage accuracy as ±18 mV (±1.2%) over -40°C to +85°C and 1–150 mA load, per Electrical Characteristics Table (Page 4). This tolerance applies because its 1.5 V output falls below the 1.8 V threshold where ±1.0% is guaranteed; the ±18 mV limit ensures predictable behavior in precision analog circuits powered from this rail.

Does TCR2LN15,LF(SE) require an external resistor on the CONTROL pin?

No, TCR2LN15,LF(SE) includes an internal pull-down between CONTROL and GND, so no external resistor is needed for default OFF-state behavior. The CONTROL pin accepts direct logic-level signals (0–6.0 V), and driving it to ≥1.0 V enables regulation while ≤0.4 V disables output and activates auto-discharge - simplifying interface design with MCUs or GPIOs.

Can TCR2LN15,LF(SE) operate with a 1.8 V input supply?

Yes, TCR2LN15,LF(SE) supports minimum input voltage of 1.5 V per Absolute Maximum Ratings. With a 1.5 V output and 600 mV max dropout at 150 mA, a 1.8 V input yields functional margin only at very light loads (<~20 mA). For reliable 150 mA operation, VIN ≥ 2.1 V is recommended - aligning with partially discharged single-cell Li-ion or fresh alkaline sources.

What is the thermal performance of TCR2LN15,LF(SE) on a standard FR4 PCB?

On a 40 mm × 40 mm, two-layer FR4 board (50% copper coverage per side), TCR2LN15,LF(SE) has a power dissipation rating of 300 mW. At 200 mA and 0.6 V dropout (VIN = 2.1 V), power dissipation is 120 mW - well within limits and resulting in <15°C junction-to-ambient rise, ensuring stable operation without heatsinking in handheld applications.

Is the center pad of the SDFN4 package electrically connected and how should it be handled?

Yes, the center pad of the TCR2LN15,LF(SE) SDFN4 package is internally connected to GND. Toshiba recommends soldering it to a dedicated GND plane to improve thermal conduction (reducing θJA by ~30%) and lowering EMI susceptibility. Leaving it floating or unconnected degrades thermal performance and may compromise long-term reliability under sustained load.