Onsemi BSS84LT1G P-Channel Logic Level Enhancement Mode Field Effect Transistor (FET) Datasheet and Application Overview

The Onsemi BSS84LT1G is a P-Channel Logic Level Enhancement Mode Field Effect Transistor widely used in low-voltage, low-power switching applications. Designed with advanced process technology, this MOSFET offers high efficiency and reliability in compact circuit designs, making it suitable for portable electronics, power management systems, and load switching.

Key Electrical Characteristics

The device features a low threshold voltage (VGS(th)) of -1.5 V to -2.5 V, enabling seamless operation with logic-level signals from microcontrollers or digital ICs (e.g., 3.3 V or 5 V systems). Its drain-source voltage (VDS) is rated at -50 V, while the continuous drain current (ID) reaches -130 mA. With a low on-resistance (RDS(on)) of 10 Ω (max) at VGS = -10 V, it minimizes power loss and heat generation during conduction. The compact SOT-23 surface-mount package ensures space-efficient PCB integration.

Application Overview

The BSS84LT1G is ideal for:

1. Load Switching: Controls power to peripherals in battery-operated devices.

2. Power Management: Used in DC-DC converters and voltage inversion circuits.

3. Signal Level Shifting: Interfaces between high- and low-voltage components.

4. Protection Circuits: Serves as a reverse-polarity guard or over-current switch.

Designers should consider gate-source voltage limits (VGS max ±12 V) and operating temperature range (-55°C to +150°C) for robust performance.

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ICGOODFIND: The BSS84LT1G excels in low-voltage, high-efficiency switching, offering designers a balance of performance and compactness for modern electronic systems.

Keywords:

1. Logic-Level MOSFET

2. Low On-Resistance

3. Enhancement Mode

4. Load Switching

5. SOT-23 Package