Toshiba Semiconductor and Storage TCR2EF29,LM(CT

Overview

TCR2EF29,LM(CT) from Toshiba Electronic Devices & Storage Corporation is a 2.9 V fixed-output CMOS low dropout (LDO) regulator delivering up to 200 mA with 180 mV typical dropout at 150 mA load, 35 μVrms output noise, and ±60 mV load transient response-designed for analog/RF power rails in portable instrumentation and wireless sensor nodes.

For engineers reviewing the TCR2EF29,LM(CT) datasheet, TCR2EF29,LM(CT) pinout, TCR2EF29,LM(CT) application, or TCR2EF29,LM(CT) equivalent, key selection criteria include dropout voltage at 2.9 V output, fast transient behavior under 1 mA–150 mA step loads, ceramic capacitor compatibility (CIN ≥ 0.1 μF, COUT ≥ 1.0 μF), and on/off control interface timing.

Technical Context

The TCR2EF29,LM(CT) integrates a CMOS pass transistor with internal overcurrent protection and auto-discharge functionality activated when CONTROL is pulled low. Its feedback loop is optimized for stability with 1.0 μF ceramic output capacitance and supports input voltages from 1.5 V to 5.5 V.

It operates across −40°C to +85°C ambient temperature, maintains ±1.0% output accuracy for VOUT ≥ 1.8 V, and achieves 73 dB ripple rejection at 1 kHz-enabling clean biasing of RF front-ends and precision ADCs without external filtering.

Key Specifications

Pinout & Package

TCR2EF29,LM(CT) is packaged in ESV (SOT-553), a 1.6 mm × 1.6 mm × 0.55 mm ultra-small surface-mount package weighing 3.0 mg (typ.), optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCR2EF29,LM(CT), the TCS2EF29,LM(CT) offers identical performance in a drop-in replacement form, while the MCP1703T-2902E/MB trades noise and dropout performance for wider package availability and higher current margin-making it viable only where 2.9 V rail cleanliness is secondary to layout flexibility.

Availability

TCR2EF29,LM(CT) is available at Aetrix Electronics and suitable for portable medical sensors, wireless IoT endpoints, RF front-end biasing, and industrial signal conditioning requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for TCR2EF29,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 over 50 years of analog IC expertise.

The TCR2EF series targets ultra-low-noise, fast-transient LDO applications in space-constrained portable electronics-emphasizing ceramic capacitor compatibility, sub-200 mV dropout, and auto-discharge for intelligent power sequencing.

FAQ

What is the minimum input voltage required for TCR2EF29,LM(CT) to maintain regulation at full 200 mA load?

The TCR2EF29,LM(CT) requires VIN ≥ VOUT + VDO = 2.9 V + 0.23 V = 3.13 V (max dropout at 200 mA, per datasheet Table "Dropout voltage" for 3.0 V ≤ VOUT ≤ 5.0 V). At 150 mA, typical dropout is 180 mV, so VIN ≥ 3.08 V suffices. Below this, output voltage drops linearly with input.

Can TCR2EF29,LM(CT) be used with aluminum polymer capacitors instead of ceramic for COUT?

No-TCR2EF29,LM(CT) is characterized and stabilized exclusively for ceramic output capacitors with ESR < 10 Ω. Aluminum polymer capacitors typically exhibit higher ESR and different frequency-phase behavior, risking oscillation or degraded transient response. The datasheet explicitly recommends ceramic types only.

Does TCR2EF29,LM(CT) require an external pull-up resistor on the CONTROL pin?

No. TCR2EF29,LM(CT) includes an internal pull-down on the CONTROL pin, ensuring default OFF state when left unconnected. An external pull-up is only needed if active-high enable logic must override the default OFF condition-e.g., interfacing with open-drain microcontroller GPIO.

How does the auto-discharge function behave during CONTROL pin transition from HIGH to LOW?

When CONTROL transitions from ≥1.0 V to ≤0.4 V, TCR2EF29,LM(CT) disables the pass transistor and activates an internal discharge FET between VOUT and GND. This discharges a 1.0 μF output capacitor from 2.9 V to <0.1 V in <1 ms-verified in Application Note Figure 9 "Control Transient Response" waveforms.

Is TCR2EF29,LM(CT) compatible with PCB reflow profiles for lead-free assembly?

Yes. TCR2EF29,LM(CT) in ESV (SOT-553) package is rated for standard JEDEC J-STD-020D lead-free reflow, with peak temperature up to 260°C for 30 seconds. The package dimensions and thermal mass align with IPC-7095 guidelines for small-outline SMT components.