MAX8649EWE+T

Voltage - Output (Min/Fixed):	0.75V
Base Part Number:	MAX8649
Supplier Device Package:	16-WLP (2x2)
Package / Case:	16-UFBGA, WLCSP
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	3.25MHz
Current - Output:	1.8A
Voltage - Output (Max):	1.38V
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.5V
Number of Outputs:	1
Output Type:	Programmable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

MAX8649EWE+T application field and working principle

Introduction

MAX8649EWE+T is a high-efficiency, high-voltage step-down DC-DC switching regulator with a maximum output voltage of 4.0V, resulting in an efficiency of over 95%. The chip provides 3A continuous output current for powering medium- to small-sized applications including digital cameras, portable navigation devices, PDAs and cell phones.

Application Field

MAX8649EWE+T can be used in a variety of applications, such as digital cameras, portable navigation devices, PDAs, and cell phones. As a step-down DC-DC switching regulator, the chip helps ensure a low power consumption and helps maximize runtime of the applications. The chip offers a wide range of features that enable a high efficiency and output voltage accuracy, such as adjustable output voltage, overload protection, as well as short-circuit protection with auto-recovery.

Working Principle

To understand the working principle of the MAX8649EWE+T, first, let\'s look at the structure of the chip, which consists of an input capacitor and a power MOSFET. There are two main functions of the chip — regulating the output voltage and maintaining a constant output current. The input voltage is stepped-down by the power MOSFET and then regulated by the MAX8649EWE+T. The output voltage is monitored by a feedback circuit, which adjusts the MOSFET\'s gate voltage to maintain the desired output voltage. The output current is maintained by a current-sense amplifier and a current error amplifier. The current error amplifier keeps the output current constant by sensing the actual output current and comparing it with the programmed current limit, and adjusting the gate voltage of the power MOSFET accordingly.

Conclusion

MAX8649EWE+T is a high-efficiency, high-voltage step-down DC-DC switching regulator. The chip offers efficient regulation of the output voltage and constant output current, which makes it ideal for powering medium- to small-sized applications in the digital camera, portable navigation device, PDA, and cell phone industries. The chip offers various features to ensure a low power and maximize the applications\' runtime.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description