BAT54W - Planar Schottky Barrier Diode

Overview

The BAT54W is a planar Schottky barrier diode designed for high-efficiency rectification and switching applications. This surface-mount device features a low forward voltage drop and fast switching characteristics, making it ideal for high-frequency circuits. The diode is constructed with a guard ring for junction protection, enhancing reliability in demanding environments. Packaged in a very small SMD form factor, the BAT54W is optimized for space-constrained applications while maintaining excellent electrical performance.

Key Features

• Low Forward Voltage: Minimizes power loss and improves system efficiency
• Guard Ring Protected: Enhanced junction protection against electrostatic discharge and reverse voltage transients
• Compact SMD Package: Space-saving design for high-density PCB layouts
• Fast Switching: Ideal for high-frequency applications
• High Temperature Operation: Reliable performance across a wide temperature range
• Lead-Free and RoHS Compliant: Meets environmental standards

Applications

The BAT54W is versatile and finds use in numerous electronic applications, including:

• Power Management: DC-DC converters, voltage clamping circuits
• Signal Demodulation: RF and mixer circuits
• Reverse Polarity Protection: Battery-powered devices
• High-Speed Switching: Digital circuits, logic gates
• Portable Electronics: Smartphones, tablets, wearables
• Automotive Systems: Infotainment, lighting controls

Electrical Characteristics

Absolute Maximum Ratings

• Reverse Voltage (VR): 30 V
• Forward Continuous Current (IF): 200 mA
• Peak Forward Surge Current (IFSM): 1 A (pulse width = 1 μs)
• Power Dissipation (Ptot): 200 mW
• Operating Temperature Range (Tj): -65°C to +125°C
• Storage Temperature Range (Tstg): -65°C to +150°C

Typical Electrical Parameters

• Forward Voltage (VF): 0.32 V (at IF = 100 mA)
• Reverse Leakage Current (IR): 0.1 μA (at VR = 25 V)
• Junction Capacitance (Cj): 2 pF (at VR = 0 V, f = 1 MHz)
• Reverse Recovery Time (trr): 4 ns (typical)

Package Information

The BAT54W is available in a compact SOT-323 (SC-70) surface-mount package, which is ideal for space-sensitive applications. The package dimensions and pin configuration are as follows:

Package Dimensions

• Package Type: SOT-323 (SC-70)
• Height: 1.1 mm (max)
• Width: 1.25 mm (max)
• Length: 2.0 mm (max)
• Lead Pitch: 0.65 mm

Pin Configuration

• Pin 1: Anode (A1) - First diode anode
• Pin 2: Common Cathode (K) - Shared cathode connection
• Pin 3: Anode (A2) - Second diode anode

Reliability and Quality

The BAT54W is manufactured using high-quality materials and processes to ensure long-term reliability. The device undergoes rigorous testing to meet industry standards for performance and durability. Key reliability features include:

• ESD Protection: Withstands electrostatic discharges up to 2 kV (Human Body Model)
• Moisture Sensitivity: MSL Level 1 (unlimited floor life at ≤30°C/85% RH)
• Flammability Rating: UL 94 V-0 compliant

Thermal Characteristics

Proper thermal management is essential for optimal performance. The BAT54W features the following thermal properties:

• Thermal Resistance (Junction-to-Ambient): 625°C/W
• Maximum Junction Temperature: 125°C

Ordering Information

The BAT54W is available in tape and reel packaging for automated assembly. Standard ordering options include:

• BAT54W-7-F: Standard package, tape and reel (3000 units per reel)
• BAT54WT-7-F: Alternative packaging option

Conclusion

The BAT54W planar Schottky barrier diode offers an excellent combination of low forward voltage, fast switching, and compact packaging. Its robust design and reliable performance make it suitable for a wide range of applications in consumer electronics, automotive systems, and power management circuits. The guard ring protection and SMD package further enhance its versatility for modern electronic designs.