Toshiba Semiconductor and Storage TCR2LN085,LF(SE

Overview

TCR2LN085,LF(SE) from Toshiba Electronic Devices & Storage Corporation is a CMOS low-dropout linear regulator delivering fixed 0.85 V output at up to 200 mA, featuring ultra-low 2 μA max quiescent current, 1000 mV typical dropout at 150 mA, and auto-discharge functionality in an SDFN4 package (0.8 mm × 0.8 mm × 0.38 mm). It serves as a power supply for ultra-low-power microcontrollers and sensors in space-constrained portable electronics.

For engineers reviewing the TCR2LN085,LF(SE) datasheet, TCR2LN085,LF(SE) pinout, TCR2LN085,LF(SE) application, or TCR2LN085,LF(SE) equivalent, key selection criteria include its 0.85 V fixed output, ±18 mV output voltage tolerance (VOUT < 1.8 V), 250–1000 mV dropout range across load, SDFN4 thermal and footprint constraints, and CONTROL pin logic interface for ON/OFF sequencing in battery-powered systems.

Technical Context

The TCR2LN085,LF(SE) integrates a CMOS pass transistor with internal overcurrent protection and an active auto-discharge circuit tied to the CONTROL pin. Its bias network achieves 2 μA max quiescent current across −40°C to +85°C, enabling multi-year operation on coin-cell batteries.

It operates with ceramic input/output capacitors as small as 0.1 μF, leveraging stable phase margin design; dropout voltage scales with output voltage-1000 mV typ. at 150 mA for 0.85 V output-and CONTROL pin thresholds are defined at VCT(ON) ≥ 1.0 V and VCT(OFF) ≤ 0.4 V.

Key Specifications

Pinout & Package

SDFN4 package: 4-terminal ultra-small plastic mold (0.8 mm × 0.8 mm × 0.38 mm), center thermal pad recommended to be connected to GND for thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCR2LN085,LF(SE), the XC6210B085MR-G offers lower typical IQ but requires 10× more board area and omits auto-discharge, while RP114K085D-TR-F reduces footprint slightly but sacrifices 50 mA drive and all discharge functionality-making TCR2LN085,LF(SE) optimal for space- and discharge-sensitive ultra-low-power designs.

Availability

TCR2LN085,LF(SE) is available at Aetrix Electronics and suitable for wearable health sensors, BLE beacon modules, smart hearing aids, industrial wireless sensor nodes, and ultra-compact IoT edge devices requiring stable component supply with guaranteed long-term sourcing.

Supply support for TCR2LN085,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-efficiency, miniaturized semiconductor solutions for consumer, industrial, and automotive markets, with emphasis on power management and analog ICs.

The TCR2LN series targets ultra-low-power portable electronics, delivering CMOS LDOs optimized for coin-cell and energy-harvesting applications where quiescent current, footprint, and fast discharge control are primary design constraints.

FAQ

What is the maximum input voltage rating for TCR2LN085,LF(SE)?

The TCR2LN085,LF(SE) has an absolute maximum input voltage (VIN) rating of 6.0 V. Operation above this level risks permanent damage. For reliable 0.85 V output regulation, VIN must remain ≥ (0.85 V + dropout voltage), with typical dropout at 1000 mV under 150 mA load-so minimum functional VIN is ~1.85 V. Always observe derating guidelines per Toshiba's Reliability Handbook.

Does TCR2LN085,LF(SE) require external components for stability?

Yes, TCR2LN085,LF(SE) requires 0.1 μF ceramic capacitors on both VIN and VOUT pins, placed as close as possible to the device. These are mandatory for loop stability and transient response; omitting them causes oscillation or poor load regulation. The internal compensation is optimized specifically for 0.1 μF ceramics-larger values or different dielectrics may degrade performance.

How does the CONTROL pin function on TCR2LN085,LF(SE)?

The CONTROL pin on TCR2LN085,LF(SE) is an active-high enable input. When voltage ≥ 1.0 V is applied, the regulator turns ON; when ≤ 0.4 V, it shuts down and activates the internal 20 Ω auto-discharge path to drain VOUT. An internal pull-down ensures safe default-OFF behavior if the pin is left unconnected-no external resistor is needed.

What is the output voltage accuracy specification for TCR2LN085,LF(SE)?

TCR2LN085,LF(SE) specifies output voltage accuracy as ±18 mV over the full operating temperature range (−40°C to +85°C), applicable because its 0.85 V output falls below the 1.8 V threshold where ±1.0% tolerance applies. This tight absolute tolerance ensures compatibility with sub-1.0 V logic domains and precision analog circuits without additional calibration.

Can TCR2LN085,LF(SE) be used with lithium-polymer battery input?

Yes, TCR2LN085,LF(SE) supports input voltages from 1.5 V to 6.0 V, covering the full discharge curve of single-cell Li-Po (3.0–4.2 V nominal). Its 1000 mV dropout at 150 mA allows regulation down to ~1.85 V VIN, supporting operation well into battery depletion. Thermal design must account for PD = (VIN − 0.85 V) × IOUT-use the SDFN4 thermal pad and FR4 board layout per Toshiba's 40 mm × 40 mm reference.