BD8622EFV-E2

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Applications:	Converter, Flat Screen TV
Voltage - Input:	2.7 V ~ 5.5 V
Number of Outputs:	1
Voltage - Output:	--
Operating Temperature:	-10°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	20-VSSOP (0.173", 4.40mm Width) Exposed Pad
Supplier Device Package:	20-HTSSOP-B
Base Part Number:	BD862*

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BD8622EFV-E2

Description
The BD8622EFV-E2 is a product of the specialized field of PMIC (Power Management Integrated Circuits) voltage regulators. This product is part of the special purpose voltage regulator group in the PMIC family that provides a value-added feature; it is capable of supplying both a normal operating voltage and a low-voltage emergency operation voltage. The low-voltage emergency mode allows operation with an external source of standby power such as a battery, even when external power is intermittently turned off. This product can be used to maintain stability of the operated circuit, even when a primary power source is lost.

Features
The BD8622EFV-E2 is a special purpose, fixed output-voltage, positive in-line regulator. The main features of the product include:
• 2 V to 5.0 V (1.2 V) operation
• Maximum current-output capability of 1 A (depends on the operation voltage)
• Wide operating temperature range of 0°C to 70°C
• Low on-resistance of 5 mΩ (typical)
• Low power consumption of 0.47 W at 1 A
• High efficiency of up to 90%
• Built-in soft start and overload protection
• Short-circuit and over-current protection
• Enable pin for on/off

Applications
The BD8622EFV-E2 has a wide range of applications for power systems requiring low power consumption, low on-resistance and high efficiency. It is suitable for use in mobile systems, such as cell phones, digital cameras and PDAs, requiring specialized low-voltage power supplies.

Working Principle
The BD8622EFV-E2 operates according to a linear voltage regulation principle. It has an integrated operational amplifier (OpAmp) and two P-channel MOSFETs (metal–oxide–semiconductor field-effect transistors). When the en pin is low, the two MOSFETs are allowed to pass current between the input voltage and the output voltage. The OpAmp compares the output voltage to the internal reference voltage and its output is used to control the MOSFETs, so that the output voltage is maintained. The overall resistance of the two MOSFETs increases when the input voltage drops, so that the output voltage does not drop too much. This low-voltage operation ensures that the operating voltage is not affected by the variation of the input voltage.

Conclusion
The BD8622EFV-E2 is a special purpose in-line regulator with a wide range of applications. It provides a stable output voltage over a wide operating temperature range and is capable of supplying a normal operating voltage as well as a low-voltage emergency mode for operation with a backup power source. The product is designed for power systems requiring energy efficiency and low power consumption, and it achieves high efficiency up to 90% with a maximum current-output of 1 A. The product operates according to a linear voltage regulation principle with an integrated operational amplifier and two P-channel MOSFETs.

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