Toshiba Semiconductor and Storage TCR2EE39,LM(CT

Overview

TCR2EE39,LM(CT) from Toshiba Electronic Devices & Storage Corporation is a 3.9 V fixed-output CMOS low dropout (LDO) regulator delivering up to 200 mA with 150 mV typical dropout voltage at 3.0 V output/150 mA, 35 μV_rms output noise, ±60 mV load transient response, and ±1.0% output accuracy for 3.9 V ≥ 1.8 V. It serves as a precision power supply for RF front-ends and analog signal chains in portable instrumentation.

For engineers reviewing the TCR2EE39,LM(CT) datasheet, TCR2EE39,LM(CT) pinout, TCR2EE39,LM(CT) application, or TCR2EE39,LM(CT) equivalent, key selection criteria include fast load transient performance under ceramic capacitor constraints, Auto-discharge functionality for system power sequencing, and SOT-553 (ESV) package compatibility with space-constrained PCB layouts.

Technical Context

The TCR2EE39,LM(CT) employs a CMOS pass transistor architecture enabling ultra-low quiescent current (35 μA typ.) and high ripple rejection (73 dB typ. at 1 kHz). Its control input supports ON/OFF operation with defined logic thresholds (V_CT(ON) ≥ 1.0 V, V_CT(OFF) ≤ 0.4 V), and integrated overcurrent protection triggers foldback limiting without external components.

Designed for stability with 1.0 μF ceramic output capacitance and 0.1 μF input capacitance, the device features an Auto-discharge function that actively discharges V_OUT via internal pull-down when CONTROL is low - critical for preventing residual voltage during power-down sequences in battery-powered systems.

Key Specifications

Pinout & Package

TCR2EE39,LM(CT) is packaged in ESV (SOT-553), a 1.6 mm × 1.6 mm × 0.55 mm surface-mount package weighing 3.0 mg (typ.). This ultra-compact footprint supports high-density routing in wearables and IoT edge nodes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCR2EE39,LM(CT), TCS2023-3.9V trades off dropout and sequencing capability for broader distributor availability, while TPS7A2039PDBVR delivers superior noise performance at the expense of footprint size and lack of Auto-discharge - making TCR2EE39,LM(CT) optimal for space-constrained, sequenced-power designs needing balanced specs.

Availability

TCR2EE39,LM(CT) is available at Aetrix Electronics and suitable for portable RF transceivers, industrial sensor signal conditioning, and wearable health monitors requiring stable component supply with guaranteed long-term sourcing.

Supply support for TCR2EE39,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 high-reliability semiconductor solutions for industrial, automotive, and consumer applications, with expertise in analog, power, and logic ICs.

The TCR2EE series targets space- and power-constrained embedded systems requiring low-noise, fast-transient LDOs in ultra-small packages - specifically optimized for battery-powered IoT endpoints and portable instrumentation.

FAQ

What is the maximum input voltage rating for TCR2EE39,LM(CT)?

The absolute maximum input voltage for TCR2EE39,LM(CT) is 6.0 V. However, the recommended operating range is 1.5 V to 5.5 V per the datasheet's Operating Ranges table. Exceeding 5.5 V may trigger overvoltage stress even if within absolute maximum limits, risking long-term reliability degradation. Always maintain VIN ≤ 5.5 V in normal operation for TCR2EE39,LM(CT).

Does TCR2EE39,LM(CT) require an external resistor on the CONTROL pin?

No, TCR2EE39,LM(CT) does not require an external pull-up or pull-down resistor on the CONTROL pin. The datasheet specifies internal pull-down between CONTROL and GND, and logic thresholds are defined as V_CT(ON) ≥ 1.0 V and V_CT(OFF) ≤ 0.4 V. Direct connection to MCU GPIO or open-drain drivers is sufficient for reliable enable/disable control of TCR2EE39,LM(CT).

Can TCR2EE39,LM(CT) be used with aluminum polymer capacitors instead of ceramic?

The TCR2EE39,LM(CT) is characterized and guaranteed for stability with ceramic capacitors (C_IN ≥ 0.1 μF, C_OUT ≥ 1.0 μF, ESR < 10 Ω). Aluminum polymer capacitors typically exhibit higher ESR and different frequency response, which may compromise phase margin and cause oscillation. Toshiba explicitly recommends ceramic types for TCR2EE39,LM(CT); substitution requires full stability validation per application note guidelines.

What is the thermal resistance (θ_JA) of TCR2EE39,LM(CT) in its ESV package?

The datasheet does not specify θ_JA as a single value for TCR2EE39,LM(CT) in ESV (SOT-553). Instead, it provides board-mounted power dissipation ratings: 150 mW (unit rating) and 320 mW (on 30 mm × 30 mm × 0.8 mm FR4 board with 20 mm² copper). Thermal performance depends entirely on PCB layout - designers must follow Toshiba's recommended copper area and board stack-up to achieve rated power handling for TCR2EE39,LM(CT).

Is the ±1.0% output voltage accuracy of TCR2EE39,LM(CT) specified over temperature and line/load conditions?

Yes - the ±1.0% output voltage accuracy for TCR2EE39,LM(CT) applies to all units with V_OUT ≥ 1.8 V across the full operating temperature range (−40°C to +85°C), input voltage range (1.5 V to 5.5 V), and load current range (1 mA to 150 mA), as confirmed in the Electrical Characteristics table (Note 6). This specification excludes initial tolerance only; it encompasses initial error, line regulation, load regulation, and thermal drift combined.