RT9945GQW Allicdata Electronics
Allicdata Part #:

RT9945GQW-ND

Manufacturer Part#:

RT9945GQW

Price: $ 0.00
Product Category:

Integrated Circuits (ICs)

Manufacturer: Richtek USA Inc.
Short Description: IC LI-ION CHARGE MGMT 40WQFN
More Detail: Handheld/Mobile Devices PMIC 40-WQFN (5x5)
DataSheet: RT9945GQW datasheetRT9945GQW Datasheet/PDF
Quantity: 1000
Stock 1000Can Ship Immediately
Specifications
Series: --
Packaging: Tape & Reel (TR) 
Part Status: Obsolete
Applications: Handheld/Mobile Devices
Current - Supply: --
Voltage - Supply: 3.3 V ~ 5.5 V
Operating Temperature: -40°C ~ 85°C
Mounting Type: Surface Mount
Package / Case: 40-WFQFN Exposed Pad
Supplier Device Package: 40-WQFN (5x5)
Description

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RT9945GQW Application Field and Working Principle

PMIC - Power Management - Specialized

The RT9945GQW is a dual-channel, synchronous step-down regulator IC designed for use in mobile phones, tablets, laptop computers, and other portable electronic devices. It is optimized for low voltage applications and can be easily integrated into a mobile device power management system. The IC provides good transient response, high efficiency, and good thermal performance.

Overview of RT9945GQW

The RT9945GQW is a dual channel synchronous step-down regulator IC with an integrated MOSFET. It operates from an input voltage of 4.2V to 20V, with a maximum output current of 6A. The device provides over-current protection (OCP), over-voltage protection (OVP), over-temperature protection (OTP) and under-voltage protection (UVP). It also offers low output ripple and excellent load and line regulation.

Features of RT9945GQW

  • Integrated MOSFET.
  • Operating input voltage range: 4.2V to 20V.
  • Output current up to 6A.
  • High efficiency.
  • Good transient response.
  • Over-current, over-voltage, over-temperature and under-voltage protection.
  • Low output ripple.

Application Areas of RT9945GQW

The RT9945GQW is used in mobile phones, tablets, laptop computers, and other portable electronic devices. It is optimized for low voltage applications and can be easily integrated into a mobile device power management system. Some of the applications in which the RT9945GQW can be used are:

  • Mobile phone chargers.
  • Portable battery chargers.
  • USB power adapters.
  • Tablet power adapters.
  • Laptop power adapters.

Working Principle of RT9945GQW

The RT9945GQW is a synchronous step-down regulator IC that operates from an input voltage of 4.2V to 20V, with a maximum output current of 6A. The device turns on and off the output MOSFETs to regulate the output voltage to the desired level. When the voltage at the input exceeds the desired output voltage, the output MOSFETs are turned off and the output voltage starts to drop. When the input voltage falls below the desired output voltage, the output MOSFETs turn on and the output voltage increases. When the input voltage is equal to the desired output voltage, the output MOSFETs remain on. Thus, the output voltage is regulated to the desired level. The device also provides over-current, over-voltage, over-temperature, and under-voltage protection.

Conclusion

The RT9945GQW is a dual-channel, synchronous step-down regulator IC designed for use in mobile phones, tablets, laptop computers, and other portable electronic devices. It provides good transient response, high efficiency, and good thermal performance. Additionally, it is optimized for low voltage applications and offers various protection features. Thus, the RT9945GQW is an ideal choice for mobile device power management applications.

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

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