STMicroelectronics STPS2L30AF

Overview

STPS2L30AF from STMicroelectronics is a 30 V, 2 A low-drop Schottky rectifier in SMA Flat Notch package, optimized for high-frequency DC/DC converters and synchronous rectification with MOSFETs. It features typ. VF = 0.325 V at 2 A / 125 °C, Tj(max) = 150 °C, avalanche-rated (108 W), and ECOPACK2-compliant surface-mount construction.

For engineers reviewing the STPS2L30AF datasheet, STPS2L30AF pinout, STPS2L30AF application, or STPS2L30AF equivalent, key selection criteria include forward voltage drop at high temperature, thermal resistance junction-to-lead (20 °C/W), repetitive peak reverse voltage (30 V), and compatibility with parallel MOSFET-based synchronous rectifier topologies in compact power supplies.

Technical Context

This Schottky rectifier uses a single-chip silicon structure to minimize conduction losses while maintaining controlled reverse leakage-critical for efficiency in high-frequency SMPS operating above 100 kHz. Its low VF and optimized trade-off between conduction and reverse recovery losses enable higher system efficiency than standard PN diodes in battery charger and telecom power applications.

The device supports multiple thermally enhanced packages (SMA Flat Notch, SMA Flat, SMB Flat) with validated Rth(j-l) values of 20 °C/W (SMA Flat Notch/SMA Flat) and 15 °C/W (SMB Flat), enabling design flexibility for PCB layout and thermal management under varying ambient conditions and duty cycles.

Key Specifications

Pinout & Package

SMA Flat Notch is a surface-mount, lead-free, UL94 V0 epoxy package with cathode band marking and optimized thermal conduction via leads. Dimensions: D = 2.25–2.90 mm, E = 5.00–5.35 mm, E1 = 3.95–4.60 mm, L = 0.75–1.20 mm, G = 2.00 mm, G1 = 0.85 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB230-E3/54 and SS23, STPS2L30AF delivers superior thermal performance (20 °C/W vs. ≥25 °C/W), higher junction temperature rating (+150 °C), and verified avalanche capability-making it the preferred choice for compact, high-reliability DC/DC converters in industrial and telecom equipment.

Availability

STPS2L30AF is available at Aetrix Electronics and suitable for battery chargers, telecom power supplies, SSD power rails, and cordless appliance PSUs requiring stable component supply across extended production lifecycles.

Supply support for STPS2L30AF 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 industrial, automotive, and consumer markets.

The STPS2L30AF belongs to ST's high-efficiency Schottky rectifier product line, engineered specifically for high-frequency, space-constrained DC/DC conversion where low VF, thermal robustness, and avalanche tolerance are mandatory.

FAQ

What is the maximum allowable PCB copper area for optimal thermal performance of STPS2L30AF in SMA Flat Notch?

For STPS2L30AF in SMA Flat Notch, thermal resistance junction-to-ambient drops from 5.0 °C/W (no copper) to ≤2.5 °C/W with ≥100 mm² of 35 µm copper per lead, as confirmed in Figure 14 of DS1526 Rev 8. Minimum recommended copper area is 50 mm² per lead to maintain Tj < 130 °C at 2 A continuous load in still air.

Does STPS2L30AF support synchronous rectification with gate drivers like STMicroelectronics' SRK1001?

Yes-STPS2L30AF is explicitly designed for parallel operation with N-channel MOSFETs in synchronous rectifier topologies, as stated in the product description. Its low VF and fast switching behavior align with control timing requirements of dedicated SR controllers such as SRK1001, which drive external MOSFETs while the STPS2L30AF provides fail-safe body-diode backup.

Is STPS2L30AF pin-compatible with STPS2L30A (SMA) or STPS2L30UF (SMB Flat)?

No-STPS2L30AF (SMA Flat Notch), STPS2L30A (SMA), and STPS2L30UF (SMB Flat) have different footprints and lead configurations. SMA Flat Notch has a notched edge and asymmetric lead spacing; SMA uses standard gull-wing leads; SMB Flat has wider body and longer leads. PCB layout and stencil must be redesigned for each variant.

What is the typical reverse recovery time (trr) of STPS2L30AF, and why is it not specified in the datasheet?

Schottky rectifiers like STPS2L30AF are majority-carrier devices with no minority-carrier storage; thus, they exhibit negligible reverse recovery time (effectively <1 ns). The datasheet omits trr because it is not a meaningful parameter-unlike PN diodes, Schottkys avoid reverse recovery losses entirely, which is a core reason for their use in high-frequency SMPS.