Toshiba Semiconductor and Storage CMS11(TE12L)

Overview

CMS11(TE12L) from Toshiba is a Schottky barrier rectifier optimized for low-loss DC/DC conversion in compact power supplies, delivering 2.0 A average forward current at ≤0.55 V peak forward voltage (IFM = 2.0 A), with 40 V repetitive peak reverse voltage rating and thermal resistance of 60 °C/W when mounted on ceramic board. It serves as a primary output rectifier in switching mode power supplies and battery charging circuits for portable electronics.

For engineers reviewing the CMS11(TE12L) datasheet, CMS11(TE12L) pinout, CMS11(TE12L) application, or CMS11(TE12L) equivalent, key selection criteria include verified VFM performance at rated IF, junction-to-ambient thermal resistance under defined PCB mounting conditions, reverse leakage at full VRRM, and compatibility with high-frequency SMPS topologies requiring fast recovery and low conduction loss.

Technical Context

The CMS11(TE12L) employs a planar Schottky barrier structure enabling zero minority-carrier storage and ultrafast switching with no reverse recovery charge. Its forward voltage is characterized across three test currents (0.5 A, 1.0 A, 2.0 A), confirming monotonic rise to 0.55 V max at full-rated 2.0 A.

Thermal performance is explicitly defined for two mounting configurations: 60 °C/W on ceramic board (50 mm × 50 mm, 2 mm × 2 mm pad) and 135 °C/W on glass-epoxy board (6 mm × 6 mm pad), directly linking layout decisions to safe operating area limits.

Key Specifications

Pinout & Package

Package: M-FLAT™ (Toshiba proprietary surface-mount package, JEITA 3-4E1A footprint, 3.0 × 1.4 × 2.1 mm, 0.023 g). Two-terminal device: Anode and Cathode only.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Compared with RB055LAM-40TR and SS24-HF, CMS11(TE12L) offers the lowest thermal resistance (60 °C/W) under ceramic-mount conditions and is qualified for long-lifecycle portable equipment production since 2000, whereas alternatives prioritize newer compliance or higher current headroom.

Availability

CMS11(TE12L) is available at Aetrix Electronics and suitable for switching mode power supply applications, portable equipment battery charging circuits, and compact industrial DC/DC modules requiring stable component supply and proven field reliability.

Supply support for CMS11(TE12L) 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 discrete semiconductors, power devices, and logic ICs with emphasis on energy efficiency and miniaturization.

The CMS11(TE12L) belongs to Toshiba's M-FLAT™ Schottky rectifier product line, engineered specifically for high-frequency, space-constrained power conversion in consumer and portable electronics.

FAQ

What is the maximum allowable junction temperature for CMS11(TE12L) during continuous operation?

The absolute maximum junction temperature for CMS11(TE12L) is 150°C, but Toshiba recommends limiting continuous operation to Tj ≤ 120°C to ensure high reliability. This derating guideline is based on accelerated life testing and applies regardless of ambient temperature or mounting condition. For example, at 2.0 A load with 0.55 V forward drop, CMS11(TE12L) dissipates 1.1 W; using its 60 °C/W Rth(j-a) on ceramic board yields ΔT = 66°C, allowing safe operation up to ~54°C ambient before reaching 120°C junction.

Does CMS11(TE12L) have a specified reverse recovery time (trr)?

No - CMS11(TE12L) is a Schottky barrier rectifier and exhibits no minority-carrier storage, so it has no defined reverse recovery time (trr = 0 ns). This eliminates reverse recovery losses and associated EMI spikes common in PN-junction rectifiers, making CMS11(TE12L) ideal for high-frequency switching applications like QR flyback and resonant converters where trr-induced losses degrade efficiency.

Can CMS11(TE12L) be used in place of a standard PN junction rectifier in an existing 40 V, 2 A design?

Yes, CMS11(TE12L) can replace a PN rectifier in a 40 V, 2 A design, provided polarity is observed and thermal layout accommodates its specific Rth(j-a) values. Its lower VFM reduces conduction loss significantly - e.g., replacing a 1.0 V PN diode with CMS11(TE12L) at 2 A cuts power loss from 2.0 W to 1.1 W. However, higher IRRM (up to 500 μA) versus typical PN diodes (<1 μA) must be evaluated in high-impedance bias networks.

What is the soldering land recommendation for achieving the 60 °C/W thermal resistance spec of CMS11(TE12L)?

To achieve the published 60 °C/W junction-to-ambient thermal resistance, CMS11(TE12L) must be mounted on a ceramic board measuring 50 mm × 50 mm with a soldering land of exactly 2.0 mm × 2.0 mm. Deviations - such as smaller pads, different board material (e.g., FR-4), or reduced copper area - increase Rth(j-a) substantially; on glass-epoxy with 6 mm × 6 mm pads, Rth(j-a) rises to 135 °C/W. Layout adherence is mandatory to meet the datasheet's thermal performance claim.

Is CMS11(TE12L) compliant with RoHS and REACH regulations?

CMS11(TE12L) is manufactured per Toshiba's environmental compliance program, but its standard version (TE12L suffix) uses a Pb-containing termination finish. For RoHS-compliant designs, specify SS24-HF or consult Toshiba for Pb-free variants. REACH SVHC screening confirms no substances above threshold levels in active die or mold compound. Always verify latest compliance status via Toshiba's official product change notices before high-volume deployment.