ISL6551IR

Frequency - Switching:	50kHz ~ 500kHz
Base Part Number:	ISL6551
Supplier Device Package:	28-QFN (6x6)
Package / Case:	28-VQFN Exposed Pad
Operating Temperature:	0°C ~ 85°C (TA)
Control Features:	Current Limit, Dead Time Control, Enable, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	50%
Series:	--
Voltage - Supply (Vcc/Vdd):	10.8 V ~ 13.2 V
Output Phases:	1
Number of Outputs:	1
Topology:	Full-Bridge
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Obsolete
Packaging:	Tube

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The ISL6551IR is a DC/DC switching controller integrated circuit, produced by Renasas Electronics, that provides a constant-voltage/constant-current output based on the output from a DC/DC converter. This device is commonly found in a variety of applications and provides a variable voltage and/or current output, based on the power requirement of the device or system it is powering.In terms of application and working principle, the ISL6551IR is typically used for power management in various portable electronic applications and is suitable for input voltage ranges of 2.7V to 5.5V. The built-in control circuit allows the user to control the output voltage and current in a variety of ways and offers a wide range of applications, such as automotive, industrial and communications.The ISL6551IR’s internal switch control circuit operates by controlling the on-time, off-time, switching frequency and output voltage, depending on the specific requirements of the application. This control circuit is able to provide a constant and stable output voltage, even during fluctuations in the input voltage.The charge pump circuit and the output voltage compare circuit inside the device enable the accurate and quick adjustment of the output voltage and current. This ensures a constant and beneficial output voltage, no matter what the input voltage is. The internal current sense amplifier helps to monitor the output current, which can both prevent over current and keep a more accurate output current.The ISL6551IR features a number of features and benefits not typically found in other voltage regulator designs. For instance, the inrush current limit, under voltage protection, and overvoltage protection features incorporated into this device provide great protection against potential problems. In addition, the embedded over temperature protection, power save mode and selectable diode-emulation soft-start features help to optimize the device for specific applications and ensure that it is always operating safely and efficiently.Furthermore, this device consists of a high integration level, meaning that fewer external components are required for its operation. This, in turn, helps to reduce the size and cost of the entire system and makes it more energy efficient. As a bonus, the ISL6551IR can be easily set up using a graphical user interface or via the serial port interface.In summary, the ISL6551IR is a versatile and efficient DC/DC switching controller, suitable for a variety of applications. With its wide range of onboard features and benefits, this device can be easily implemented in any power management application and its capabilities can be adjusted to meet the needs of the user. Furthermore, the high level of integration and the convenient setup make it an ideal solution for any power management requirement.

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