BSS87 - N-Channel Vertical D-MOS Transistor

Overview

The BSS87 is an N-channel vertical D-MOS transistor designed for high-efficiency switching applications. This component offers excellent performance in low-voltage, high-speed switching scenarios, making it ideal for interfacing directly with CMOS and TTL logic circuits. Its advanced vertical D-MOS construction ensures low on-state resistance and fast switching times, which are critical for power management applications.

Engineered for reliability and efficiency, the BSS87 is widely used in power supply circuits, motor control, and other applications requiring precise switching capabilities. Its compact package and robust electrical characteristics make it a versatile choice for both industrial and consumer electronics.

Features

• Direct Interface to CMOS and TTL: Compatible with standard logic levels, simplifying circuit design.
• Low On-State Resistance (R_DS(on)): Minimizes power loss and improves efficiency in switching applications.
• Fast Switching Speed: Enables high-frequency operation, suitable for PWM and other time-critical applications.
• High Input Impedance: Reduces drive power requirements, making it energy-efficient.
• Low Gate Drive Requirements: Operates efficiently with low control voltages, reducing overall system power consumption.
• Excellent Thermal Stability: Designed to maintain performance under varying temperature conditions.
• Compact Package Options: Available in industry-standard packages for easy integration into PCB designs.

Applications

The BSS87 is suitable for a wide range of applications, including but not limited to:

• Power Management: DC-DC converters, voltage regulators, and load switches.
• Motor Control: H-bridge circuits, PWM motor drivers, and servo control systems.
• Logic Level Shifting: Interface circuits between low-voltage microcontrollers and higher-voltage peripherals.
• Automotive Electronics: Switching and control circuits in automotive systems.
• Consumer Electronics: Power switches in portable devices, LED drivers, and battery management systems.
• Industrial Automation: Relay replacements, solenoid drivers, and actuator control.

Electrical Characteristics

The following table summarizes the key electrical specifications of the BSS87 under standard operating conditions (unless otherwise noted):

Absolute Maximum Ratings

• Drain-Source Voltage (V_DS): 60V
• Gate-Source Voltage (V_GS): ±20V
• Drain Current (I_D): 0.5A (continuous), 2A (pulsed)
• Total Power Dissipation (P_tot): 1W at 25°C
• Operating Junction Temperature (T_j): -55°C to +150°C
• Storage Temperature (T_stg): -55°C to +150°C

Static Characteristics

• Threshold Voltage (V_GS(th)): 1V to 3V (V_DS = V_GS, I_D = 1mA)
• On-State Resistance (R_DS(on)): 5Ω max (V_GS = 10V, I_D = 0.5A)
• Gate-Source Leakage Current (I_GSS): ±100nA (V_GS = ±20V)
• Drain-Source Leakage Current (I_DSS): 1µA max (V_DS = 60V, V_GS = 0V)

Dynamic Characteristics

• Input Capacitance (C_iss): 30pF typical (V_DS = 25V, V_GS = 0V, f = 1MHz)
• Output Capacitance (C_oss): 10pF typical (V_DS = 25V, V_GS = 0V, f = 1MHz)
• Reverse Transfer Capacitance (C_rss): 5pF typical (V_DS = 25V, V_GS = 0V, f = 1MHz)
• Turn-On Delay Time (t_d(on)): 10ns typical (V_DD = 30V, I_D = 0.5A, R_G = 25Ω)
• Turn-Off Delay Time (t_d(off)): 30ns typical (V_DD = 30V, I_D = 0.5A, R_G = 25Ω)

Package Information

The BSS87 is available in a variety of package options to suit different application requirements. The most common package is the SOT-23, which provides a compact footprint for space-constrained designs.

SOT-23 Package Dimensions

• Package Type: SOT-23 (TO-236)
• Mounting Style: Surface Mount
• Number of Pins: 3
• Pin Configuration:
  • Pin 1: Gate (G)
  • Pin 2: Source (S)
  • Pin 3: Drain (D)
• Dimensions: 2.9mm x 1.3mm x 0.95mm (L x W x H)
• Weight: Approximately 0.008g

Thermal Characteristics

• Thermal Resistance, Junction-to-Ambient (R_θJA): 357°C/W
• Thermal Resistance, Junction-to-Case (R_θJC): 125°C/W

Conclusion

The BSS87 N-channel vertical D-MOS transistor is a highly reliable and efficient component for a variety of switching applications. Its compatibility with CMOS and TTL logic levels, combined with low on-state resistance and fast switching speeds, makes it an excellent choice for modern electronic designs. Whether used in power management, motor control, or logic interfacing, the BSS87 delivers consistent performance in a compact and robust package.