In circuit designs such as portable consumer electronics, lithium battery protection, small load switches and low-power power management, the conduction loss, switching speed, drive compatibility and package size of low-power MOSFETs directly affect the battery life and miniaturization level of end equipment. The Slkor FDV305N is an N-channel trench power MOSFET (TrenchFET) in a miniature SOT-23 surface-mount package. It features a drain-source breakdown voltage of 20V and a continuous drain current of 0.9A, with low on-resistance, low gate charge and low-voltage drive compatibility. Suitable for various low-voltage low-power control scenarios, it serves as a cost-effective power switching solution for portable electronics and small power systems.

1. Core Product Parameters

• Device Type: N-Channel Trench Power MOSFET (TrenchFET)
• Drain-Source Breakdown Voltage (VDS): 20V
• Gate-Source Voltage (VGS): ±12V
• On-Resistance (RDS(on)): 220mΩ max. @ VGS=4.5V, ID=0.9A; 300mΩ max. @ VGS=2.5V, ID=0.7A
• Continuous Drain Current (ID, TC=25℃): 0.9A
• Pulsed Drain Current (IDM): 2.0A
• Maximum Power Dissipation (PD, TC=25℃): 0.35W
• Gate Threshold Voltage (VGS(th)): 0.6V ~ 1.5V
• Total Gate Charge (Qg): 0.8nC typical
• Maximum Operating Junction Temperature (TJ): 150℃
• Storage Temperature Range: -50℃ ~ 155℃
• Package: SOT-23 surface-mount

2. Core Product Advantages

2.1 TrenchFET Architecture with Low Conduction Loss

Built with TrenchFET process technology, the device delivers optimized conduction performance. With a typical on-resistance of only 170mΩ at 4.5V gate drive, it effectively reduces power loss in the on-state, improves circuit energy conversion efficiency, and fits low-voltage low-current operating scenarios.

2.2 Low Gate Charge for Fast Switching Response

The device features a typical total gate charge of 0.8nC, paired with nanosecond-scale switching delay and rise/fall times. It enables fast switching speed and low dynamic loss, supports high-frequency switching operation, and meets the fast switching requirements of small power management and load switch applications.

2.3 Low-Voltage Drive Compatibility for Multiple Control Signals

With a gate threshold voltage ranging from 0.6V to 1.5V, the device can be fully turned on at a gate voltage as low as 2.5V. It is compatible with various low-voltage control levels including 1.8V, 2.5V, 3.3V and 4.5V, and can be directly driven by low-voltage master chips such as MCUs and PMICs, adapting to the low-voltage system architecture of portable devices.

2.4 Miniature SMD Package for Product Miniaturization

The ultra-compact SOT-23 surface-mount package occupies minimal PCB space and supports standard automated SMT assembly with consistent soldering quality. It is suitable for high-density, compact circuit designs and matches the miniaturization requirements of portable electronic products.

2.5 Low Leakage for Reduced Standby Power

Both zero-gate drain current and gate leakage current are kept at low levels, which reduces static power consumption in circuit standby mode. It is ideal for battery-powered portable devices and helps extend product battery life.

3. Main Application Fields

With its advantages of low-voltage drive, low loss and small package, the FDV305N is widely used in various low-voltage low-power control scenarios: lithium battery protection boards, load switches for portable devices, USB power switches, small power management modules, wearable electronics, low-power control circuits in consumer electronics, and power switching circuits in battery-powered systems.

4. Engineering Design Guidelines

Drive Matching: A 4.5V gate drive voltage is recommended for optimal conduction performance. When using gate voltages of 2.5V or lower, pay attention to the increased loss caused by higher on-resistance, and verify whether the current carrying capacity meets design requirements. Temperature Derating: Perform current derating design based on ambient temperature, heat dissipation conditions and duty cycle in practical applications. Ensure the device junction temperature does not exceed 150℃ to guarantee long-term operational reliability. PCB Layout: It is recommended to widen power trace paths appropriately to optimize the device heat dissipation path. Keep gate drive traces short to reduce the influence of parasitic parameters on switching speed. ESD Protection: MOSFETs are electrostatic sensitive devices. Standard ESD protection procedures shall be implemented during production, storage and assembly to avoid gate electrostatic breakdown. Body Diode Application: The built-in source-drain body diode can be used for low-current freewheeling scenarios. In case of large reverse current surges, verify diode parameters according to actual working conditions.

5. Product Summary

The Slkor FDV305N is an N-channel trench MOSFET designed for low-voltage low-power scenarios, housed in a miniature SOT-23 package. It features 20V voltage withstand, 0.9A current carrying capability, low on-resistance, low gate charge and low-voltage drive compatibility. With balanced parameters and compact size, it is widely adaptable to applications such as battery protection, load switching and power management for portable devices, serving as a cost-effective domestic power device choice for low-power low-voltage control circuits.

Slkor introduction
According to Song Shiqiang, Slkor Semiconductor (https://www.slkormicro.com) grandly opened its third franchised store in Huaqiangbei on August 14, 2026. The store mainly offers MOSFETs, power-management ICs, Hall elements, optocouplers, IGBTs, SiC silicon-carbide components, AC/DC devices, TVS diodes, Schottky diodes, thyristors and other electronic components.



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