Toshiba Semiconductor and Storage TCR2EN25,LF

Overview

TCR2EN25,LF from Toshiba Electronic Devices & Storage Corporation is a 2.5 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 160 mV typical dropout at 150 mA load, 35 µV_rms output noise, and ±55 mV load transient response - deployed in space-constrained portable power rails for cellular phones and wearables.

For engineers reviewing the TCR2EN25,LF datasheet, TCR2EN25,LF pinout, TCR2EN25,LF application, or TCR2EN25,LF equivalent, key selection criteria include dropout voltage at 150 mA, ±1.0% output accuracy (for 2.5 V ≥ 1.8 V), Auto-discharge functionality, ON/OFF control interface compatibility, and ceramic capacitor support (C_IN = 0.1 µF, C_OUT = 1.0 µF).

Technical Context

The TCR2EN25,LF implements a CMOS-based LDO architecture with integrated overcurrent protection and an active Auto-discharge circuit that rapidly discharges the output capacitor when disabled via the CONTROL pin. Its internal reference and error amplifier enable tight regulation across −40°C to +85°C ambient temperature.

It operates with a 1.5–5.5 V input range and requires only 35 µA quiescent current in active mode (0 mA load) and just 0.1 µA in standby (CONTROL = 0 V), making it suitable for always-on subsystems. The device achieves 73 dB ripple rejection at 1 kHz and supports fast load transients due to optimized internal compensation compatible with 1 µF ceramic output capacitors.

Key Specifications

Pinout & Package

TCR2EN25,LF is housed in the ultra-compact SDFN4/SDFN4E plastic mold package (0.8 mm × 0.8 mm × 0.38 mm, 0.6 mg weight), featuring a bottom-exposed thermal pad (center electrode) recommended to be connected to GND for optimal thermal performance and EMI suppression.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCR2EN25,LF, the XC6219B251MR-G trades ultra-small size for greater input voltage flexibility, while the BD3508HUV-ME2 delivers superior noise and current headroom but omits Auto-discharge-making TCR2EN25,LF uniquely balanced for space-constrained, sequenced-power portable designs.

Availability

TCR2EN25,LF is available at Aetrix Electronics and suitable for smartphone baseband power, wearable sensor hubs, IoT edge node MCUs, portable medical diagnostics, and other applications requiring stable component supply with ultra-small footprint and low-noise regulation.

Supply support for TCR2EN25,LF 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 belongs to Toshiba's CMOS Linear Regulator product line, engineered specifically for ultra-compact, low-power portable electronics demanding minimal board area, fast transient response, and precise voltage regulation under dynamic load conditions.

FAQ

What is the maximum input voltage rating for the TCR2EN25,LF?

The TCR2EN25,LF has an absolute maximum input voltage (VIN) rating of 6.0 V. However, its recommended operating input range is 1.5 V to 5.5 V under normal conditions. Exceeding 5.5 V may compromise reliability or trigger overvoltage stress, even if within absolute maximum limits. Always maintain VIN ≤ VOUT + 1 V for optimal dropout performance in the TCR2EN25,LF.

Does the TCR2EN25,LF require external components to operate stably?

Yes, the TCR2EN25,LF requires two external ceramic capacitors: a 0.1 µF input capacitor (CIN) placed near the VIN pin and a 1.0 µF output capacitor (COUT) placed near the VOUT pin. These are mandatory for stability, noise suppression, and transient response. The device is optimized for ceramic capacitors with ESR < 10 Ω - no series resistor or tantalum cap is needed for basic operation of the TCR2EN25,LF.

How does the Auto-discharge function work in the TCR2EN25,LF?

When the CONTROL pin is driven LOW (≤0.4 V), the TCR2EN25,LF disables regulation and activates an internal discharge switch between VOUT and GND. This rapidly bleeds charge from the output capacitor, preventing residual voltage from powering downstream circuits unintentionally. The discharge path remains active until CONTROL returns HIGH, ensuring clean, predictable power-down behavior in the TCR2EN25,LF.

What is the guaranteed output voltage accuracy of the TCR2EN25,LF over temperature and load?

The TCR2EN25,LF guarantees ±1.0% output voltage accuracy for VOUT ≥ 1.8 V (including its 2.5 V nominal output) across the full operating temperature range (−40°C to +85°C) and load currents from 1 mA to 150 mA. This specification is verified per Toshiba's electrical characteristics table and applies under standard test conditions (VIN = VOUT + 1 V, CIN = 0.1 µF, COUT = 1.0 µF). Accuracy degrades slightly below 1.8 V, but the TCR2EN25,LF is not rated for sub-1.8 V operation.

Can the TCR2EN25,LF be used with a 1.0 µF ceramic output capacitor only, without input capacitance?

No - while the TCR2EN25,LF is designed to work with a 1.0 µF ceramic output capacitor, a 0.1 µF ceramic input capacitor is also required for stability and to suppress high-frequency noise from the input source. Omitting CIN risks oscillation, degraded PSRR, and poor transient immunity. The datasheet explicitly specifies both capacitors as necessary for proper operation of the TCR2EN25,LF under all load and line conditions.