STMicroelectronics STPS3L60U

Overview

STPS3L60U from STMicroelectronics is a 60 V, 3 A low-drop Schottky rectifier optimized for high-frequency switching in SMPS and DC/DC converters, featuring a typical forward voltage of 0.53 V at 100 °C and 3 A, avalanche rating up to 144 W (10 µs), and thermal resistance of 15 °C/W (junction-to-leads, SMB Flat Notch). It serves as a primary output rectifier in telecom battery chargers and space-constrained low-voltage inverters.

For engineers reviewing the STPS3L60U datasheet, STPS3L60U pinout, STPS3L60U application, or STPS3L60U equivalent, key selection criteria include forward voltage drop at elevated temperature, avalanche energy capability, thermal resistance under real PCB copper area, and package-specific current derating curves - all confirmed in DS2134 Rev 7.

Technical Context

This Schottky rectifier uses a planar silicon structure with metal-semiconductor junction optimized for minimal reverse recovery charge and negligible switching losses. Its avalanche rating is validated per repetitive 10 µs pulses at Tj = 125 °C, enabling robustness against transient overvoltage in unregulated flyback or synchronous rectifier topologies.

Thermal performance is package-dependent: SMB Flat Notch achieves Rth(j-l) = 15 °C/W with short leads, while DO-15 rises to 35 °C/W; conduction loss modeling uses P = 0.44 × IF(AV) + 0.05 × IF²(RMS), verified in AN604 and AN4021.

Key Specifications

Pinout & Package

STPS3L60U is available in five discrete surface-mount and axial packages: SMB Flat Notch (primary variant for STPS3L60UFN), SMB (STPS3L60U), SMB Flat (STPS3L60UF), DO-201AD (STPS3L60RL), and DO-15 (STPS3L60Q/STPS3L60QRL). All variants are two-terminal devices with cathode band marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB360 and VSSAF360M, STPS3L60U delivers superior thermal performance (15 °C/W vs. ≥20 °C/W), highest validated avalanche energy (144 W), and unique SMB Flat Notch variant for height-sensitive applications - making it optimal for telecom chargers and compact industrial DC/DC.

Availability

STPS3L60U is available at Aetrix Electronics and suitable for telecom battery chargers, USB-C PD adapters, industrial DC/DC converters, and LED driver secondary rectification requiring stable component supply across multiple package variants (SMB Flat Notch, SMB, DO-201AD).

Supply support for STPS3L60U 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 analog, power, microcontroller, and sensor solutions for automotive, industrial, and consumer markets.

STPS3L60U belongs to ST's high-efficiency power Schottky rectifier product line, engineered specifically for high-frequency, low-loss secondary-side rectification in space- and thermally-constrained power supplies.

FAQ

What is the maximum junction temperature and how is it enforced?

The STPS3L60U has a maximum operating junction temperature of +150 °C, validated under conditions where (dPtot/dTj) < (1/Rth(j-a)) to prevent thermal runaway. This requires proper PCB copper area and thermal vias - especially critical in SMB Flat Notch, where Rth(j-a) drops from 100 °C/W (no copper) to ~4.5 °C/W with 200 cm² copper per lead, per Figure 14.

Does STPS3L60U support synchronous rectification drive schemes?

No - STPS3L60U is a passive Schottky rectifier and does not integrate gate drive or control logic. It functions as a self-commutated device; synchronous rectification requires an actively driven MOSFET (e.g., STripFET-based SR controllers). However, its low VF and zero Qrr make it a high-performance alternative where active control is impractical.

How does the SMB Flat Notch package differ electrically from standard SMB?

The SMB Flat Notch variant shares identical electrical specs (VRRM, IF(AV), VF) but features a flattened cathode lead with notch for improved mechanical stability and lower Rth(j-l) = 15 °C/W (vs. 20 °C/W for SMB). Its footprint (5.84 mm × 3.44 mm) matches SMB but enables tighter stacking and better thermal coupling to inner-layer copper planes.

Is STPS3L60U suitable for automotive applications?

STPS3L60U is not AEC-Q101 qualified and lacks automotive-grade screening or guaranteed PPAP documentation. While its 150 °C Tj rating and avalanche capability suit harsh environments, ST recommends automotive-qualified alternatives like STPS3L60TV1 (AEC-Q101) for under-hood or infotainment power rails.