STMicroelectronics STPS3H100UFN

Overview

STPS3H100UFN from STMicroelectronics is a 100 V, 3 A average forward current power Schottky rectifier optimized for high-frequency switch-mode power supplies and 12 V rail DC/DC converters. It features a typical forward voltage drop of 0.63 V at 3 A and 125 °C, negligible switching losses, avalanche capability (172 W at 10 µs), and operates up to 175 °C junction temperature - enabling compact, thermally efficient designs in LED lighting and consumer power adapters.

For engineers reviewing the STPS3H100UFN datasheet, STPS3H100UFN pinout, STPS3H100UFN application, or STPS3H100UFN equivalent, key selection criteria include its SMB Flat package thermal resistance (R_th(j-l) = 15 °C/W), low leakage (≤1.00 mA at 125 °C), and trade-off-optimized VF/IR balance for efficiency-critical 100 V rectification.

Technical Context

This Schottky rectifier uses a planar silicon structure with metal-semiconductor junction design to achieve near-zero reverse recovery charge and minimal switching loss - critical for >100 kHz SMPS topologies. Its avalanche rating (172 W, 10 µs pulse) enables robustness against transient overvoltage without external clamping.

The device is characterized across temperature (–65 to +175 °C) and supports two package variants: SMB (R_th(j-l) = 25 °C/W) and SMB Flat (R_th(j-l) = 15 °C/W). The STPS3H100UFN variant uses the thinner SMB Flat package, reducing thermal resistance by 40% versus standard SMB while maintaining identical electrical specs and footprint compatibility.

Key Specifications

Pinout & Package

STPS3H100UFN is housed in an SMB Flat surface-mount package - a low-profile variant of SMB with reduced height and improved thermal performance. It features two terminals: cathode and anode, with cathode marked by a band on the package body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-3EY10-M3 and SB3100, STPS3H100UFN delivers superior thermal performance (15 °C/W), lower VF at operating temperature, and guaranteed avalanche robustness - making it the preferred choice for high-density, high-reliability 12 V power conversion where efficiency and transient immunity are critical.

Availability

STPS3H100UFN is available at Aetrix Electronics and suitable for LED lighting drivers, 12 V DC/DC converters, and industrial AC/DC modules requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for STPS3H100UFN 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

STPS3H100UFN belongs to ST's high-efficiency power Schottky rectifier product line, engineered specifically for high-frequency, low-voltage-output SMPS where thermal management and conduction loss minimization are primary design constraints.

FAQ

What is the maximum allowable PCB copper area for optimal thermal performance of STPS3H100UFN?

For SMB Flat package, thermal resistance junction-to-ambient drops to ≤35 °C/W with ≥2 cm² of 35 µm copper per lead (per Figure 10). Using 4 cm² total (2 cm² per pad) achieves ≤28 °C/W, enabling full 3 A current at 85 °C ambient without forced air. Thermal vias under pads further reduce R_th(j-a) by ~15%.

Does STPS3H100UFN support synchronous rectification replacement?

No - STPS3H100UFN is a passive Schottky rectifier, not a synchronous rectifier IC or MOSFET controller. It replaces standard diodes in non-synchronous topologies. For synchronous designs, ST offers dedicated controllers like SRK1001 or discrete N-channel MOSFETs such as STD10NF10L.

Is STPS3H100UFN pin-compatible with STPS3H100U?

Yes - STPS3H100UFN (SMB Flat) and STPS3H100U (SMB) share identical pinout, cathode marking, and land pattern outline dimensions (E, E1, D per datasheet Figures 12 & 14). However, SMB Flat has lower profile (A = 0.90–1.10 mm vs. SMB A2 = 0.05–0.20 mm), requiring adjusted stencil aperture height for solder paste volume control.

How is avalanche capability validated for STPS3H100UFN?

ST specifies P_ARM = 172 W at T_j = 125 °C, t_p = 10 µs (Table 1). This is measured per JEDEC JESD24-10 using controlled unclamped inductive switching (UIS) tests. The device is rated for repetitive operation under these conditions - confirmed via 1000-cycle stress testing with thermal monitoring and post-test parameter verification.