EL7564CRE

Voltage - Output (Min/Fixed):	1V
Base Part Number:	EL7564
Supplier Device Package:	28-HTSSOP
Package / Case:	28-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	200kHz ~ 1MHz
Current - Output:	4A
Voltage - Output (Max):	3.8V
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	4.5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Obsolete
Packaging:	Tube

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EL7564CRE Application Field and Working Principle

EL7564CRE is a DC-DC switching regulator PMIC designed to provide a highly efficient and robust system power solution by utilizing integrated high-speed switching elements, control, and protection circuits. Its applications include mobile phones, power supply, storage products, and many other types of consumer electronics.

General Overview

EL7564CRE is a monolithic DC-DC switching regulator for low power and portable applications. It integrated an oscillator, PWM controller and MOSFET switches that reduce external components count to a minimum. It has a wide operating voltage range of 2.7V to 5.5V and can provided up to 4A output current with voltage mode control. It also features frequency synchronization, safe shutdown, programmable under-voltage threshold, output current limit and thermal shutdown protection. It is available in a miniature package which makes it ideal for applications where size is a major concern.

Features of EL7564CRE

The EL7564CRE is equipped with several features that enhances its performance and range of applications. These features include:• Wide operating voltage range (2.7V to 5.5V)• Frequency synchronization up to 1MHz• Low-side MOSFET current sense capability• Programmable UVLO, output current limit, and thermal shutdown protections• Overcurrent protection• Output voltage mathching, rectify and noise filters.

Applications for EL7564CRE

The EL7564CRE is commonly used for mobile applications such as cellphones, cameras and other portable consumer electronics. It is also used to provide power to LED lighting, medical equipment, audio/visual equipment, automotive components, automotive modules, and industrial automation systems.

Working Principle of EL7564CRE

The EL7564CRE operates through a voltage mode control system. The operation of the voltage mode controller starts with a sensed current in the system that is then compared with the internal reference voltage. The resulting difference is used as an input error signal to adjust the output voltage of the system.To generate the output voltage, the MOSFETs are switched at a fixed frequency and also they switch at the same fixed frequency when they receive an input voltage. The output voltage from the MOSFET is fed to the output filter capacitor. This voltage is outputted during each switching cycle and the average voltage over a period of time is equal to the DC output voltage.To maintain and control the output voltage, the device uses separate reference and error amplifier tubes. Both of these contain a comparator and an amplifier. With these two in use, the device can perform critical functions like soft start and GPU-safe low voltage operation mode.The EL7564CRE uses a wide operating voltage range from 2.7V to 5.5V and also has many different protection mechanisms in-built including frequency synchronization, overload and overcurrent protection, UVLO, output current limit, and thermal shutdown protection circuits.To maximize efficiency, it employs Pulse Width Modulated (PWM) switching techniques with a constant frequency and minimum output ripple voltage. The switching frequency is programmable and can be synchronized to an external clock via the SYNC pin.

Conclusion

The EL7564CRE DC-DC switching regulator PMIC is ideal for portable consumer electronics and provides a highly efficient, reliable and robust system power solution. The device integrates several features such as wide operating voltage range, frequency synchronization, and various protection circuits to maximize power efficiency and safety. Its low power and miniaturized package allows it to be used in applications where space is a concern.

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