Toshiba Semiconductor and Storage TCR2EN125,LF(SE

Overview

TCR2EN125,LF(SE) from Toshiba Electronic Devices & Storage Corporation is a 1.25 V fixed-output CMOS low dropout regulator delivering up to 200 mA with 360 mV typical dropout at 150 mA load, ±1.0% output accuracy (for VOUT ≥ 1.8 V; 1.25 V variant specified as ±18 mV), and 35 µV_rms output noise. It integrates on/off control, auto-discharge, overcurrent protection, and operates in the ultra-small SDFN4/SDFN4E package (0.8 mm × 0.8 mm × 0.38 mm), targeting power management in space-constrained portable electronics.

For engineers reviewing the TCR2EN125,LF(SE) datasheet, TCR2EN125,LF(SE) pinout, TCR2EN125,LF(SE) application, or TCR2EN125,LF(SE) equivalent, key selection criteria include its 1.25 V output voltage tolerance (±18 mV), 360 mV dropout at 150 mA, 35 µV_rms noise performance, fast load transient response (±55 mV), and compatibility with 0.1 µF input / 1.0 µF ceramic output capacitors.

Technical Context

The TCR2EN125,LF(SE) employs a CMOS-based LDO architecture with integrated P-channel pass transistor, enabling low quiescent current (35 µA typ.) and fast transient recovery. Its control logic accepts TTL-compatible ON/OFF signals (V_CT(ON) ≥ 1.0 V, V_CT(OFF) ≤ 0.4 V) and activates internal discharge when disabled.

Designed for high-density portable systems, it supports stable regulation with minimal external components: only 0.1 µF ceramic input and 1.0 µF ceramic output capacitors are required. The device maintains ±55 mV load transient response under 1 mA ↔ 150 mA step changes and achieves 73 dB ripple rejection at 1 kHz with 2.5 V output - though actual ripple rejection for 1.25 V output is not specified in source data.

Key Specifications

Pinout & Package

The TCR2EN125,LF(SE) is housed in the ultra-small SDFN4/SDFN4E plastic mold package (0.8 mm × 0.8 mm × 0.38 mm, 0.6 mg weight), featuring a bottom-exposed thermal pad that must be connected to GND or left open per datasheet guidance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout regulator applications.

Compared with R1190L125B-TR-FE and MCP1703T-125I/MB, the TCR2EN125,LF(SE) offers superior space efficiency (0.64 mm² vs. 8.12 mm²), integrated auto-discharge for medical safety compliance, and lower dropout for extended battery runtime - making it optimal for next-generation miniaturized portable devices where board area and power sequencing are critical.

Availability

TCR2EN125,LF(SE) is available at Aetrix Electronics and suitable for wearable health sensors, Bluetooth LE audio earbuds, industrial wireless sensor nodes, medical patch monitors, and ultra-compact IoT edge devices requiring stable component supply and long-term lifecycle support.

Supply support for TCR2EN125,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, with expertise in power management, logic, memory, and discrete devices for consumer, industrial, and automotive markets.

The TCR2EN series targets ultra-compact, battery-powered applications demanding low quiescent current, minimal footprint, and fast transient response - specifically engineered for portable electronics where board space and energy efficiency are primary constraints.

FAQ

What is the output voltage tolerance specification for TCR2EN125,LF(SE)?

The TCR2EN125,LF(SE) has an output voltage accuracy of ±18 mV at IOUT = 50 mA and Tj = 25°C, as specified in the Electrical Characteristics table for VOUT < 1.8 V. This corresponds to ±1.44% of nominal 1.25 V, distinct from the ±1.0% tolerance applied to variants ≥1.8 V. The TCR2EN125,LF(SE) maintains this tolerance across −40°C to +85°C operating temperature range with a temperature coefficient of 75 ppm/°C.

Does TCR2EN125,LF(SE) require external components for stability?

Yes, the TCR2EN125,LF(SE) requires two external ceramic capacitors: a 0.1 µF input capacitor (CIN) placed close to the VIN pin and a 1.0 µF output capacitor (COUT) placed adjacent to the VOUT pin. Toshiba specifies ESR of the output capacitor must be below 10 Ω. No additional compensation network or feedforward capacitor is needed, and the device remains stable with these minimal components across its full operating range.

What is the dropout voltage of TCR2EN125,LF(SE) at full rated load?

The TCR2EN125,LF(SE) exhibits a typical dropout voltage of 360 mV at IOUT = 150 mA and Tj = 25°C, with a maximum of 550 mV under worst-case conditions. At its absolute maximum rated output current of 200 mA, dropout increases slightly but remains within specification limits. This enables regulation from as low as 1.61 V input, supporting single-cell LiFePO₄ or two-series alkaline battery configurations.

How does the CONTROL pin function on TCR2EN125,LF(SE)?

The CONTROL pin on TCR2EN125,LF(SE) is a TTL-compatible enable input: applying ≥1.0 V turns the regulator ON, while ≤0.4 V disables it. When left unconnected, the internal pull-down ensures default OFF state. In OFF mode, the auto-discharge function actively sinks current from VOUT to GND through an internal resistor, rapidly discharging the output capacitor - a key feature for safety-critical and medical applications.

Is TCR2EN125,LF(SE) RoHS compliant and lead-free?

Yes, TCR2EN125,LF(SE) is RoHS compliant and lead-free, as confirmed by Toshiba's product documentation and packaging designation "LF(SE)", where "LF" indicates lead-free and "SE" denotes tape-and-reel packaging. The device meets EU RoHS Directive 2011/65/EU requirements and contains no intentionally added lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE).