Diodes Incorporated DFLS220L-7

Overview

DFLS220L-7 from Diodes Incorporated is a 2.0A surface-mount Schottky barrier rectifier in PowerDI123 package, designed for low-loss DC/DC conversion and reverse polarity protection. It delivers VF = 0.36V at IF = 2.0A, VRRM = 20V, and IFSM = 40A, enabling high-efficiency power management in space-constrained consumer and industrial power supplies.

For engineers reviewing the DFLS220L-7 datasheet, DFLS220L-7 pinout, DFLS220L-7 application, or DFLS220L-7 equivalent, key selection criteria include forward voltage drop at rated current, thermal resistance (RθJA = 60°C/W on GETEK), surge capability (40A half-sine), and RoHS-compliant green packaging with matte tin annealed terminals.

Technical Context

This Schottky rectifier uses guard ring die construction to suppress transient-induced avalanche breakdown and patented interlocking clip design to sustain 40A non-repetitive surge current without bond wire failure. Its low 0.36V forward drop at 2.0A directly reduces conduction loss in 3.3V–12V output buck converters.

Thermal performance is defined by two RθJA values: 60°C/W on a 50.8mm × 50.8mm GETEK board (25% anode / 75% cathode copper) and 180°C/W on FR-4 with minimal pads - confirming layout-dependent thermal design sensitivity.

Key Specifications

Pinout & Package

Package: PowerDI123 - surface-mount, single-diode configuration with cathode band marking; molded green plastic (UL 94V-0), 0.01g weight, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB220-E3/54 and SS22, DFLS220L-7 offers the lowest VF (0.36V) and highest IFSM (40A) in the 20V/2A PowerDI123 class, making it optimal for thermally constrained, high-reliability power paths where both efficiency and surge immunity are critical.

Availability

DFLS220L-7 is available at Aetrix Electronics and suitable for USB PD adapters, industrial PLC I/O modules, automotive body control units, and smart home hub power stages requiring stable component supply and long-term production continuity.

Supply support for DFLS220L-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The DFLS220L belongs to Diodes' Power Discrete product line, engineered specifically for high-efficiency, low-profile power conversion and protection in consumer, industrial, and automotive applications.

FAQ

What is the maximum junction temperature for continuous operation?

The DFLS220L-7 has an operating junction temperature range of –55°C to +125°C. At maximum rated IF(AV) = 2.0A and ambient temperature of +85°C on a GETEK board, junction temperature remains within limit due to RθJA = 60°C/W and PD = 1.67W - resulting in ~145°C worst-case, which exceeds rating; derating is required above +70°C ambient.

Is DFLS220L-7 qualified for automotive applications?

Yes - DFLS220L-7 is AEC-Q101 qualified for automotive use. It is manufactured in IATF 16949 certified facilities and supports PPAP documentation. The guard ring die and interlocking clip design meet stringent automotive surge and reliability requirements including load dump and reverse battery testing.

How does the PowerDI123 package compare thermally to SMA or SOD-123?

PowerDI123 provides significantly lower RθJA (60°C/W on GETEK) than SMA (typically >100°C/W) and SOD-123 (≈120°C/W) due to its exposed cathode tab acting as a thermal pad. This enables 2× higher power dissipation in same PCB area, confirmed by Diodes' test data using standardized 25.4mm × 25.4mm copper layout.

Can DFLS220L-7 be used in place of a 3A Schottky rectifier?

No - DFLS220L-7 is rated for 2.0A average forward current. Substituting it for a 3A device risks thermal runaway under sustained load. Its 40A surge rating applies only to short-duration (8.3ms) events; continuous current must remain ≤2.0A with appropriate PCB copper and ambient derating per datasheet Figure 1 and thermal notes.