Toshiba Semiconductor and Storage TCR2EE125,LM(CT

Overview

TCR2EE125,LM(CT from Toshiba Electronic Devices & Storage Corporation is a 1.25 V fixed-output CMOS low dropout (LDO) regulator delivering up to 200 mA with fast load transient response (±60 mV), low dropout voltage (380 mV typ. at 150 mA), and ultra-low output noise (35 μVrms typ.). It features on/off control, overcurrent protection, auto-discharge, and operates from −40°C to +85°C - ideal for powering sensitive analog and RF circuitry in portable instrumentation and wireless modules.

For engineers reviewing the TCR2EE125,LM(CT datasheet, TCR2EE125,LM(CT pinout, TCR2EE125,LM(CT application, or TCR2EE125,LM(CT equivalent, key selection criteria include dropout performance at 1.25 V output, stability with 1.0 μF ceramic output capacitance, control logic compatibility (V_CT(OFF) ≤ 0.4 V), and thermal derating on small PCB footprints using the ESV (SOT-553) package.

Technical Context

The TCR2EE125,LM(CT uses a CMOS pass transistor architecture enabling low quiescent current (35 μA typ.) and high ripple rejection (73 dB typ. at 1 kHz). Its internal control loop is optimized for fast transient recovery under dynamic load steps (1 mA ↔ 150 mA), minimizing output voltage deviation without requiring external compensation.

It integrates an active pull-down on the CONTROL pin and supports direct connection to microcontroller GPIOs. The device maintains ±1.0% output accuracy for V_OUT ≥ 1.8 V; for 1.25 V output, accuracy is specified as ±18 mV (−1.44% / +1.44%), validated across temperature and line/load conditions.

Key Specifications

Pinout & Package

TCR2EE125,LM(CT is packaged in the ESV (SOT-553) footprint: 1.6 mm × 1.6 mm × 0.55 mm, 5-pin surface-mount package with exposed pad (not electrically connected), weighing 3.0 mg (typ.). This ultra-compact package supports high-density PCB layouts in space-constrained wearables and miniaturized modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCR2EE125,LM(CT, the XC6219B122MR-G offers identical output voltage tolerance and lower dropout but omits critical power-management features, while the BD3572EFJ-ME2 trades auto-discharge for higher current and thermal protection - making TCR2EE125,LM(CT optimal for compact, sequenced, low-noise embedded systems.

Availability

TCR2EE125,LM(CT is available at Aetrix Electronics and suitable for portable medical sensors, RF front-end power, industrial IoT edge nodes, and low-power microcontroller core supply requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for TCR2EE125,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 and manufactures high-reliability semiconductor solutions for automotive, industrial, and consumer applications, with emphasis on energy efficiency and miniaturization.

The TCR2EE series belongs to Toshiba's CMOS LDO regulator product line, engineered specifically for noise-sensitive analog and RF power domains where fast transient response, ultra-low noise, and minimal footprint are mandatory.

FAQ

What is the guaranteed output voltage accuracy of TCR2EE125,LM(CT over temperature?

The TCR2EE125,LM(CT guarantees output voltage accuracy of ±18 mV (±1.44%) over the full operating temperature range of −40°C to +85°C, as confirmed in the Electrical Characteristics table (Note 6) for 1.25 V output. This specification applies under standard test conditions: VIN = VOUT + 1 V, IOUT = 50 mA, CIN = 0.1 μF, COUT = 1.0 μF, and Tj = 25°C - with line and load regulation contributing ≤45 mV additional deviation.

Can TCR2EE125,LM(CT operate with only a 1.0 μF ceramic output capacitor?

Yes, TCR2EE125,LM(CT is fully stable with a single 1.0 μF ceramic output capacitor (X5R/X7R, ESR < 10 Ω), as explicitly validated in Toshiba's datasheet (Features section and Absolute Maximum Ratings). This eliminates need for secondary bulk capacitance and supports compact layout - critical for the ESV (SOT-553) package used by TCR2EE125,LM(CT.

What happens to the output when the CONTROL pin is left floating on TCR2EE125,LM(CT?

When the CONTROL pin is left floating on TCR2EE125,LM(CT, the internal pull-down resistor (explicitly stated in Features) forces the pin to logic LOW, disabling the regulator and activating the auto-discharge function. As a result, VOUT rapidly discharges to GND - ensuring a known safe state during power-up or undefined MCU GPIO conditions.

Is TCR2EE125,LM(CT compatible with 1.5 V input supply?

Yes, TCR2EE125,LM(CT supports minimum input voltage of 1.5 V per its Operating Ranges table. With a 1.25 V output and 380 mV typical dropout, it delivers regulated output down to VIN = 1.63 V. At VIN = 1.5 V, the device enters dropout and cannot maintain regulation - so 1.5 V is the absolute lower limit for functional enablement, not sustained regulation.

Does TCR2EE125,LM(CT include thermal shutdown protection?

No, TCR2EE125,LM(CT does not include thermal shutdown protection. Its Absolute Maximum Ratings specify a maximum junction temperature of 150°C, and reliability guidance directs users to apply derating based on ambient temperature, power dissipation, and PCB thermal design. Overcurrent protection is present, but thermal fault handling relies on external design measures - consistent with Toshiba's published reliability documentation for the TCR2EE series.