AS3604C-ZQFP

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Applications:	Handheld/Mobile Devices
Current - Supply:	195mA
Voltage - Supply:	3 V ~ 5.5 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	48-VFQFN Exposed Pad
Supplier Device Package:	48-QFN (6x6)

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AS3604C-ZQFP is a highly integrated power management specialized for for system, ASIC and application processor. It provides an efficient and reliable solution for system power architecture in battery powered, AC powered and USB powered applications. This article will discuss the application field and working principle of the AS3604C-ZQFP.Application FieldThe AS3604C-ZQFP is a 45 V adaptive output voltage step-down switching regulator designed to supply up to four integrated copper coils. It is mainly used in the following application fields:1.Portable industrial, medical, and consumer electronics.2.High-performance ASICs and microprocessors.3.Embedded systems with complex computing and data processing requirements.4.Wireless base stations and routers.5.Battery-powered applications.6.Switched mode power supplies.Working PrincipleThe working principle of the AS3604C-ZQFP is based on step down switching regulator. A step-down topology is used to convert an input voltage to a lower voltage output. This is done by switching a power MOSFET or BJT at a high frequency. The MOSFET/BJT is switched ON for a fixed period of time and then turned OFF for a fixed period of time, thereby reducing the input voltage. The output voltage is regulated by comparison between a reference voltage and the error amplifier’s output, controlling the duty cycle of the switch.The AS3604C-ZQFP is designed to integrate all the components required for the implementation of an input voltage step-down converter onto a single chip. The main components are the power MOSFET, error amplifier, oscillator and a driver circuit.The power MOSFET is designed to switch a large amount of current with good efficiency. This MOSFET is driven by a driver circuit, consisting of an inverting driver, a pull-up PMOS device and a pull-down NMOS device. The oscillator is used to generate the switching signal for the MOSFET.The error amplifier locks the output voltage to the target value by controlling the duty cycle of the power MOSFET. The internal comparators compare the output voltage with the reference voltage and adjust the duty cycle accordingly. This results in a steady output voltage.The AS3604C-ZQFP also has protection features, such as overvoltage, undervoltage and short-circuit protection. These features protect the device from damage caused by excessive input voltage, low input voltage and short circuits.ConclusionThe AS3604C-ZQFP is a specialized power management IC designed for use in portable, industrial and consumer electronics. It features an integrated power MOSFET, oscillator, driver circuit and error amplifier, allowing it to convert an input voltage to a lower output voltage. It also offers protection features for overvoltage, undervoltage and short-circuit events. The AS3604C-ZQFP is a highly integrated and efficient solution for system power architecture in battery-powered, AC-powered and USB-powered applications.

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