STMicroelectronics STPS15L45CB

Overview

STPS15L45CB from STMicroelectronics is a dual-center-tab Schottky rectifier in DPAK package, rated for 45 V repetitive peak reverse voltage and 2 × 7.5 A average forward current per diode, with typical forward voltage drop of 0.40 V at 125 °C and 7.5 A - optimized for low-loss freewheeling and high-frequency DC-DC converters in SMPS.

For engineers reviewing the STPS15L45CB datasheet, STPS15L45CB pinout, STPS15L45CB application, or STPS15L45CB equivalent, key selection criteria include its dual-diode configuration, avalanche-rated 265 W peak power, 150 °C max junction temperature, low 0.40 V VF at operating conditions, and DPAK thermal performance with Rth(j-c) = 4 °C/W per diode.

Technical Context

This dual Schottky rectifier integrates two independent anode-cathode paths sharing a common center tab (cathode-connected), enabling synchronous freewheeling or dual-channel polarity protection. Its low 0.40 V forward voltage at 125 °C and 7.5 A minimizes conduction loss, while negligible reverse recovery charge supports operation up to several MHz.

The device features specified avalanche capability (265 W, tp = 10 µs), low junction-to-case thermal resistance (4 °C/W per diode), and low capacitance (typ. 1.0 nF at VR = 4 V), making it suitable for hard-switched topologies where reverse leakage (<60 mA at 125 °C, VR = 45 V) and thermal coupling between diodes must be managed.

Key Specifications

Pinout & Package

Package: DPAK (TO-252-3), surface-mount, single-side heatsinkable with exposed center tab (cathode connection). Dimensions: 6.22 mm × 6.73 mm × 10.40 mm (L × W × H); thermal pad area supports ≥30 cm² copper pour for Rth(j-a) ≤ 70 °C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-15BQ040-M3/45 and MBR1545CT, STPS15L45CB uniquely combines dual-anode integration, 45 V blocking, 0.40 V low-VF at operating temperature, and certified avalanche robustness - delivering superior thermal density and transient resilience in compact SMT power stages.

Availability

STPS15L45CB is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, solar microinverters, and automotive ADAS power modules requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for STPS15L45CB 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

The STPS series targets high-efficiency, high-reliability power conversion - specifically engineered for low-voltage, high-frequency rectification where thermal density, avalanche tolerance, and Schottky conduction loss are critical.

FAQ

What is the center tab connection in STPS15L45CB?

The center tab is the common cathode for both internal Schottky diodes and serves as the primary thermal interface. It must be soldered to a large copper area (≥30 cm² recommended) to achieve specified Rth(j-c) = 4 °C/W per diode and prevent thermal runaway under simultaneous conduction.

Can STPS15L45CB replace a single-diode Schottky in existing designs?

Yes, but only if the circuit uses a common-cathode configuration and does not require independent cathode routing. Pin 1 and Pin 3 are isolated anodes; using only one anode reduces total current capacity to 7.5 A and leaves half the die unused - thermal derating still applies to the active diode.

Is STPS15L45CB suitable for automotive under-hood applications?

Yes - it is qualified per AEC-Q101, operates up to 150 °C junction temperature, and features ECOPACK2 compliance. Its 265 W avalanche rating meets ISO 7637-2 Pulse 5a requirements when properly heatsunk, making it appropriate for engine control and ADAS power modules.

How does the dual-diode structure affect thermal behavior?

When both diodes conduct simultaneously, self-heating raises junction temperature nonlinearly due to thermal coupling via the shared tab. Use ΔTj(diode1) = P₁×4 + P₂×0.7 °C (per AN5088) - the 0.7 °C/W coupling factor means 1 W in Diode 2 adds 0.7 °C to Diode 1's junction temperature.