STMicroelectronics STPS2545CG-TR

Overview

STPS2545CG-TR from STMicroelectronics is a dual-center-tab Schottky rectifier optimized for high-frequency DC/DC converters and switch-mode power supplies. It delivers 2 × 12.5 A average forward current per diode, 45 V repetitive peak reverse voltage, 0.50 V typical forward voltage at 12.5 A and 125 °C, and operates up to 175 °C junction temperature - enabling efficient low-voltage freewheeling and polarity protection in compact PSU designs.

For engineers reviewing the STPS2545CG-TR datasheet, STPS2545CG-TR pinout, STPS2545CG-TR application, or STPS2545CG-TR equivalent, key selection criteria include conduction loss modeling (P = 0.42 × IF(AV) + 0.012 × IF²(RMS)), thermal coupling between dual diodes, avalanche capability (345 W, tp = 10 µs), and D²PAK package mounting torque and copper area requirements for thermal management.

Technical Context

This dual Schottky rectifier integrates two independent anode-cathode junctions sharing a common center tab (cathode-connected configuration per standard D²PAK layout). Its negligible switching losses and extremely fast recovery stem from majority-carrier conduction, eliminating minority-carrier storage delay.

Thermal design requires explicit handling of inter-diode coupling: junction-to-case resistance is 1.6 °C/W per diode, but coupling resistance (Rth(c) = 0.6 °C/W) means power dissipated in one diode raises the junction temperature of the other - critical for simultaneous conduction in interleaved topologies.

Key Specifications

Pinout & Package

The STPS2545CG-TR uses the D²PAK (TO-263AB) surface-mount package with three terminals: two anodes (A1, A2) and one shared cathode (K) on the center tab. Mounting requires soldering the exposed metal tab to a ≥8.1 mm × 10 mm copper pour for thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPS2545CT and VS-25CPH04-M3, the STPS2545CG-TR uniquely combines dual-anode integration, D²PAK SMT compatibility, and verified 345 W avalanche rating - making it optimal for space-constrained, high-reliability DC/DC converters where thermal coupling and transient robustness are co-optimized.

Availability

STPS2545CG-TR is available at Aetrix Electronics and suitable for server VRMs, industrial DC/DC converters, automotive body control modules, and LED driver polarity protection requiring stable component supply across multi-year production cycles.

Supply support for STPS2545CG-TR 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, Switzerland, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STPS2545x series belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion in space- and thermal-constrained applications such as telecom PSUs and embedded power modules.

FAQ

What is the correct PCB footprint for STPS2545CG-TR?

The recommended D²PAK footprint matches Table 6 mechanical data: 8.6–9.35 mm width (D), 10.0–10.55 mm length (E), and 8.1–8.9 mm cathode pad width (E1). A minimum 8.1 mm × 10 mm copper pour beneath the tab is required to achieve the specified 1.6 °C/W Rth(j-c); insufficient copper area increases thermal resistance by up to 2.5×.

Can STPS2545CG-TR replace a single 25 A Schottky in a freewheeling application?

No - STPS2545CG-TR contains two independent 12.5 A diodes sharing one cathode. It cannot substitute a single 25 A device unless the circuit explicitly uses dual-anode topology. Using only one anode de-rates the device to 12.5 A IF(AV) and leaves unused silicon area thermally unbalanced.

How is avalanche energy calculated for STPS2545CG-TR?

Avalanche energy is defined as PARM = 345 W for tp = 10 µs at Tj = 125 °C. For non-standard pulse durations, use Figure 3's normalized derating curve: e.g., at tp = 100 µs, normalized power drops to ~0.45, giving usable PARM ≈ 155 W. Exceeding this risks permanent junction damage.

Is the center tab electrically isolated in STPS2545CG-TR?

No - the center tab is the common cathode (K) terminal and is electrically connected to the cathode metallization of both diodes. It must be routed to the system's low-side reference (e.g., ground or output return) and cannot be left floating or insulated without breaking the circuit path.