Diodes Incorporated SDM1L20DCP3-7

Overview

SDM1L20DCP3 from Diodes Incorporated is a 20V dual common-cathode Schottky barrier diode optimized for low forward voltage (max 0.50 V at 1 A) and ultra-low leakage (max 100 µA at 20 V), housed in a compact X3-DSN1006-3 package occupying only 0.6 mm² board area. It serves as a blocking or reverse-polarity protection diode in space-constrained portable power rails.

For engineers reviewing the SDM1L20DCP3 datasheet, SDM1L20DCP3 pinout, SDM1L20DCP3 application, or SDM1L20DCP3 equivalent, key selection criteria include its 1 A average current rating, 245 °C/W thermal resistance on FR-4, 8.6 ns reverse recovery time, and NiAu bump terminations compatible with standard reflow profiles.

Technical Context

This dual-diode device integrates two independent Schottky junctions sharing a common cathode terminal, enabling bidirectional reverse protection or dual-path DC/DC output rectification. Its low VF (260–500 mV across 10–500 mA) directly reduces conduction loss in battery-fed systems, while sub-100 µA IR at 20 V preserves standby runtime.

The X3-DSN1006-3 package uses a 3-terminal die-size outline with cathode dot marking and 0.275 mm profile, supporting high-density layout. Thermal performance varies significantly with PCB pad design: RθJA is 245 °C/W on minimum recommended FR-4 layout but improves to 105 °C/W with a 1-inch-square 2 oz Cu pad.

Key Specifications

Pinout & Package

Package: X3-DSN1006-3 - ultra-thin (0.275 mm height), 0.6 mm² footprint, 3-terminal die-size package with NiAu bump terminations and cathode dot polarity indicator.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RB050M-30TR and NSR20F30NXT5G, SDM1L20DCP3 delivers the best balance of ultra-small footprint, lowest VF, and adequate leakage for consumer portable designs-making it optimal for next-gen wearables where board area and efficiency are co-constrained.

Availability

SDM1L20DCP3 is available at Aetrix Electronics and suitable for USB PD input protection, wireless earbud charging paths, Bluetooth SoC OR-ing, and smartwatch backlight boost circuits requiring stable component supply and consistent lead-free sourcing.

Supply support for SDM1L20DCP3 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, specializing in high-efficiency power management and signal integrity solutions for consumer, industrial, and automotive markets.

The SDM1L20DCP3 belongs to Diodes' low-profile Schottky diode product line, engineered specifically for space- and efficiency-critical portable electronics where minimal board area and ultra-low power loss are mandatory design requirements.

FAQ

What is the maximum continuous current per diode in SDM1L20DCP3?

The device is rated for 1 A total average rectified output current across both diodes. Since it is a dual common-cathode configuration, each diode can handle up to 1 A individually if the other is inactive-but thermal limits apply. Derating is required above 70 °C ambient, especially with minimal PCB copper.

Does SDM1L20DCP3 support reflow soldering with standard Pb-free profiles?

Yes. Its NiAu bump terminations are qualified for standard Pb-free reflow processes with peak temperatures up to 260 °C. The X3-DSN1006-3 package is compatible with IPC-J-STD-020 Level 1 moisture sensitivity handling-no baking required prior to assembly.

How does the common-cathode configuration affect PCB layout?

The shared cathode (Pin 2) must be routed as a low-impedance, low-inductance node-ideally connected directly to ground or power return plane. Separating anode traces (Pins 1 and 3) prevents crosstalk, and symmetric layout ensures matched thermal and electrical behavior between diodes.

Can SDM1L20DCP3 be used in automotive body electronics?

No. While it operates from –55 °C to +150 °C, it is not AEC-Q200 qualified and lacks automotive-specific reliability testing, traceability, or PPAP documentation. Diodes Incorporated offers AEC-Q200-qualified alternatives like DFLS120Q for such applications.