Toshiba Semiconductor and Storage TCR2EN12,LF(SE

Overview

TCR2EN12,LF(SE) from Toshiba Electronic Devices & Storage Corporation is a 1.2 V fixed-output CMOS low-dropout linear regulator in an ultra-small SDFN4/SDFN4E package (0.8 mm × 0.8 mm × 0.38 mm), delivering up to 200 mA with 360 mV typical dropout at 150 mA load, ±1.0% output accuracy (for VOUT ≥ 1.8 V; 1.2 V variant specified as ±18 mV), and 23 µVrms output noise. It integrates on/off control, auto-discharge, overcurrent protection, and supports ceramic input/output capacitors (0.1 µF/1.0 µF) for space-constrained portable power rails.

For engineers reviewing the TCR2EN12,LF(SE) datasheet, TCR2EN12,LF(SE) pinout, TCR2EN12,LF(SE) application, or TCR2EN12,LF(SE) equivalent, key selection criteria include its 1.2 V fixed output, ultra-low quiescent current (35 µA typ.), fast load transient response (±55 mV), high ripple rejection (73 dB at 1 kHz), and compatibility with minimal PCB footprint in battery-powered IoT sensors and wearable MCU core supplies.

Technical Context

The TCR2EN12,LF(SE) employs a CMOS-based LDO architecture with internal P-channel pass transistor, enabling low dropout and low bias current. Its control logic accepts TTL-compatible ON/OFF signals (VCT(OFF) ≤ 0.4 V, VCT(ON) ≥ 1.0 V) and activates auto-discharge when disabled, rapidly discharging the output capacitor via an internal pull-down path.

Stability is achieved using only 0.1 µF input and 1.0 µF output ceramic capacitors with ESR < 10 Ω, eliminating need for bulk electrolytics. The device operates across −40°C to +85°C ambient temperature and features thermal shutdown and overcurrent foldback protection-critical for unattended embedded systems.

Key Specifications

Pinout & Package

TCR2EN12,LF(SE) uses the ultra-compact SDFN4/SDFN4E package (0.8 mm × 0.8 mm × 0.38 mm, 0.6 mg weight) with wettable flank terminals for automated optical inspection. Pin 1 (VOUT) and Pin 4 (VIN) are diagonally opposite; Pin 2 (CONTROL) enables logic-level on/off control; Pin 3 (GND) and center thermal pad (to be connected to GND) provide low-impedance return and thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, ultra-small LDO applications.

Compared with TCR2EN12,LF(SE), the XC6210B122MR-G offers higher current but lacks auto-discharge and occupies 9× more board area; the BD3985FVM-1.2TR provides lower dropout and higher current but requires additional external circuitry for discharge functionality - making TCR2EN12,LF(SE) optimal for space- and power-constrained designs needing integrated control and rapid shutdown.

Availability

TCR2EN12,LF(SE) is available at Aetrix Electronics and suitable for wearable health sensors, IoT edge node microcontrollers, portable audio CODECs, and medical diagnostic handhelds requiring stable component supply with guaranteed long-term continuity.

Supply support for TCR2EN12,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-reliability semiconductor solutions for consumer, industrial, and automotive markets, with emphasis on energy efficiency and miniaturization.

The TCR2EN series targets ultra-compact, low-quiescent-current LDO applications in battery-powered portable electronics - specifically engineered to replace larger regulators while maintaining precision, noise performance, and integrated control features.

FAQ

What is the maximum input voltage rating for TCR2EN12,LF(SE)?

The absolute maximum input voltage for TCR2EN12,LF(SE) 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 degrade long-term reliability even if within absolute ratings, especially under elevated temperature or continuous load.

Does TCR2EN12,LF(SE) require an external resistor for the CONTROL pin?

No, TCR2EN12,LF(SE) does not require an external resistor on the CONTROL pin. It features an internal pull-down connection between CONTROL and GND, allowing direct interfacing with standard GPIO outputs. A logic HIGH (≥1.0 V) enables regulation; a logic LOW (≤0.4 V) disables output and activates auto-discharge.

Can TCR2EN12,LF(SE) be used with tantalum output capacitors?

Toshiba specifies ceramic capacitors (0.1 µF input, 1.0 µF output) for stable operation of TCR2EN12,LF(SE). While tantalum capacitors may function, their higher ESR and aging characteristics risk instability or degraded transient response. The datasheet explicitly recommends ESR < 10 Ω and cites ceramic compatibility - use only if validated per application note guidelines.

What is the output voltage accuracy specification for TCR2EN12,LF(SE) at 1.2 V?

For TCR2EN12,LF(SE), the output voltage accuracy is specified as ±18 mV (min/max) at IOUT = 50 mA and Tj = 25°C, per the Electrical Characteristics table. This corresponds to ±1.5% of nominal 1.2 V, distinct from the ±1.0% tolerance applied to variants with VOUT ≥ 1.8 V.

How does the auto-discharge function operate in TCR2EN12,LF(SE)?

When the CONTROL pin is driven LOW (≤0.4 V), TCR2EN12,LF(SE) disables the pass transistor and activates an internal discharge path from VOUT to GND. This rapidly depletes stored charge on the output capacitor - critical for preventing unintended wake-up or latch-up in power-gated subsystems. Discharge time depends on COUT value and load; typical behavior is sub-millisecond for 1 µF.