Philips TOPFET dual high side switch BUK218-50DY Data Sheet
Summary
This advanced TOPFET dual high side switch is a robust, monolithic power management component designed for reliable switching in high-current applications. Ideal for electrical engineers working on automotive lighting systems, solenoids, and heaters, the device offers enhanced functionality with built-in protections against overvoltage, undervoltage, and short circuits. The accompanying manual provides comprehensive technical documentation, including detailed operational standards, thermal characteristics, limiting values, and pin configurations, making it the definitive guide for integrating this robust dual switch into your next high-power design project.
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Philips Semiconductors Product specification
TOPFET dual high side switch BUK218-50DY
DESCRIPTION QUICK REFERENCE DATA Monolithic dual channel high side SYMBOL PARAMETER MIN. UNIT protected power switch in
TOPFET2 technology assembled in IL Nominal load current (ISO)
a 7 pin plastic surface mount package.
SYMBOL PARAMETER MAX. UNIT
APPLICATIONS
VBG Continuous off-state supply voltage
General purpose switch for driving IL Continuous load current
automotive lamps, motors, Tj Continuous junction temperature ˚C solenoids, heaters. RON On-state resistance, Tj = 25˚C mΩ
FEATURES FUNCTIONAL BLOCK DIAGRAM Vertical power Trench MOS
Low on-state resistance INPUT 1
CMOS logic compatible
Very low quiescent current Overtemperature protection
INPUT 2
Load current limiting Latched overload and short circuit protection
Overvoltage and undervoltage STATUS
LOAD 1
CONTROL &
shutdown with hysteresis Off-state open circuit
PROTECTION
load detection Diagnostic status indication
CIRCUITS
Voltage clamping for turn off of inductive loads ESD protection on all pins Reverse battery, overvoltage
LOAD 2
GROUND RG
and transient protection
Fig.1. Elements of the TOPFET dual HSS with internal ground resistor.
PINNING - SOT427 PIN CONFIGURATION SYMBOL PIN DESCRIPTION
load 1 ground I1 L1 input 1 DUAL
connected to mb HSTF I2 L2
status input 2 load 2 mb battery Fig. 2. Fig. 3.
CONVENTION Positive currents flow into pins, except for load and ground pins.
May 2001 Rev 1.400
Page Summary Contents For Philips TOPFET dual high side switch BUK218-50DY Data Sheet
Manual Details
| Brand | Philips |
|---|---|
| Pages | 9 |
| File Size | 43.91 KB |
| Published | July 15, 2026 |
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Frequently Asked Questions
What is the continuous nominal load current capacity?
The device supports a continuous load current of up to 16 A per channel.
What protective features does this high side switch offer?
It includes overtemperature protection, latched overload and short circuit protection, and load detection circuits.
What is the recommended operating temperature range?
The device has a continuous junction temperature range from -40°C to 150°C.
Does it require external resistors for certain conditions?
Yes, external resistors are required to limit input and status currents during reverse battery or transient overvoltage events.