Toshiba Semiconductor and Storage TCR2LN28,LF

Overview

TCR2LN28,LF from Toshiba Electronic Devices & Storage Corporation is a 2.8 V fixed-output CMOS low dropout (LDO) voltage regulator with ultra-low quiescent current (2 μA max), 200 mA output capability, and 250 mV typical dropout at 150 mA - designed for power management in space-constrained portable electronics such as cellular phones and wearables.

For engineers reviewing the TCR2LN28,LF datasheet, TCR2LN28,LF pinout, TCR2LN28,LF application, or TCR2LN28,LF equivalent, key selection criteria include its SDFN4 ultra-small package (0.8 mm × 0.8 mm), ±1.0% output accuracy (for VOUT ≥ 1.8 V), auto-discharge function, overcurrent protection, and compatibility with 0.1 μF ceramic input/output capacitors.

Technical Context

The TCR2LN28,LF integrates a CMOS pass transistor with on/off control logic and internal auto-discharge circuitry tied to the CONTROL pin. Its low dropout architecture enables stable regulation even when VIN is only 250 mV above 2.8 V output, supporting battery-powered systems down to ~3.05 V input.

It operates across −40°C to +85°C, features built-in overcurrent protection that limits output current during fault conditions, and uses a pull-down connection between CONTROL and GND to ensure defined OFF-state behavior - eliminating need for external biasing.

Key Specifications

Pinout & Package

The TCR2LN28,LF is housed in the ultra-compact SDFN4 plastic mold package (0.8 mm × 0.8 mm × 0.38 mm, weight 0.6 mg), featuring a thermally enhanced center electrode that must be connected to GND or left open per layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCR2LN28,LF, the XC6219B282MR-G offers lower quiescent current but lacks auto-discharge and occupies 9× more PCB area; the BD3572EFJ-ME2 provides higher output current and thermal protection but consumes 17× more quiescent current and requires significantly more board space.

Availability

TCR2LN28,LF is available at Aetrix Electronics and suitable for smart wearables, IoT sensor nodes, portable medical devices, and mobile audio accessories requiring stable component supply, long-term lifecycle assurance, and ultra-miniature packaging.

Supply support for TCR2LN28,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-efficiency, miniaturized semiconductor solutions for consumer, industrial, and automotive markets.

The TCR2LN series targets ultra-low-power portable electronics, delivering CMOS LDO regulators optimized for minimal board footprint, battery longevity, and seamless integration with ceramic capacitors.

FAQ

What is the output voltage tolerance of TCR2LN28,LF over temperature?

The TCR2LN28,LF guarantees ±1.0% output voltage accuracy for VOUT ≥ 1.8 V across the full operating temperature range of −40°C to +85°C. This specification applies directly to the TCR2LN28,LF and ensures consistent performance in ambient-varying portable applications without requiring external trimming or calibration.

Does TCR2LN28,LF require external components for stability?

No, the TCR2LN28,LF is internally compensated and stable with only 0.1 μF ceramic capacitors on both input (VIN) and output (VOUT) pins. Toshiba specifies ESR < 10 Ω for optimal transient response, and no additional resistors, diodes, or feedback networks are needed - simplifying design and reducing BOM count for the TCR2LN28,LF.

How does the CONTROL pin function on TCR2LN28,LF?

The CONTROL pin on TCR2LN28,LF enables active ON/OFF control: applying ≥1.0 V turns the regulator ON, while ≤0.4 V disables regulation and activates the internal auto-discharge circuit to rapidly discharge VOUT. The TCR2LN28,LF includes an internal pull-down between CONTROL and GND, ensuring a defined OFF state without external components.

What thermal considerations apply to TCR2LN28,LF in the SDFN4 package?

The TCR2LN28,LF in SDFN4 has a maximum power dissipation of 300 mW under specified FR4 board conditions (40 mm × 40 mm, 50% copper coverage). Its exposed center pad must be soldered to a GND plane for effective heat transfer. At 150 mA load and 250 mV dropout, power dissipation is ~37.5 mW - well within safe limits, but layout must minimize thermal resistance to maintain junction temperature below 150°C.

Is TCR2LN28,LF RoHS compliant and lead-free?

Yes, TCR2LN28,LF is RoHS compliant and lead-free, meeting EU Directive 2011/65/EU requirements. Toshiba confirms this status for the TCR2LN28,LF in its official product documentation and environmental compliance reports - no exemptions are applied, and the device is suitable for environmentally regulated commercial and industrial applications.