MMBT5087LT1

Series:	--
Packaging:	Cut Tape (CT)
Part Status:	Obsolete
Transistor Type:	PNP
Current - Collector (Ic) (Max):	50mA
Voltage - Collector Emitter Breakdown (Max):	50V
Vce Saturation (Max) @ Ib, Ic:	300mV @ 1mA, 10mA
Current - Collector Cutoff (Max):	50nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	250 @ 100µA, 5V
Power - Max:	300mW
Frequency - Transition:	40MHz
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3 (TO-236)
Base Part Number:	MMBT5087

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MMBT5087LT1 application field and working principle

The MMBT5087LT1 is a single-stage bipolar transistor (BJT) that can be widely used in numerous applications. The MMBT5087LT1 is widely used in power management and switching applications, such as power supplies, DC-DC converters, and motor controllers. It is also suitable for use in analog circuits, such as audio amplifiers and audio switches.The MMBT5087LT1 is a dual BJT device. The first is an NPN switching transistor and the second is a PNP Darlington device. The two complementary PNP and NPN transistors form a pair of Darlington transistors, which are useful for increasing current gain. The PNP and NPN transistors are connected in series with the base of the NPN transistor connected to the collector of the PNP transistor, and the base of the PNP transistor is connected to the collector of the NPN transistor. Together with the PNP and NPN transistors, the MMBT5087LT1 also contains a Zener diode and a resistor.The main purpose of the MMBT5087LT1 is to switch a current on or off by controlling the voltage applied to its base. For example, when a voltage is applied to its base, the NPN transistor switch is turned on, allowing current to flow from its collector to its emitter. The PNP transistor amplifies the current, increasing the current flow from its collector to its emitter. The Zener diode and resistor provide a current limit and help to protect the transistor from overvoltage.To summarise, the MMBT5087LT1 is an NPN and PNP BJT pair, often used as a switch, which can be used in a variety of different applications. The NPN transistor switches on when a voltage is applied to its base, allowing current to flow from its collector to its emitter. The PNP transistor amplifies the current, allowing the switch to switch larger currents. Finally, the Zener diode and resistor help to protect the transistor from overvoltage.

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