1A synchronous rectifier antihypertensive DC/DC converter
■ Characteristics
The XC9224 series is a 0.21Ω (Typ.) PCH driver TR and 0.23Ω (Typ.) NCH synchronous rectifier DC/DC converter with built -in NCH synchronous rectification switch TR. By reducing the on -resistance of the built -in TR, you can supply high -efficiency and stable current up to 1.0A.
The switching frequency is as high as 1MHz or 2MHz, so you can select a small inductor and is ideal for HDDs and space -saving applications with height restrictions. The current restriction can be selected by the LIM terminal, "H" = 1.2a, and "L" = 0.6A. For example, if the power supply is a USB and an AC adapter, the current restriction value is different, and it can be selected according to the specification.
You can select PWM control and PWM/PFM automatic switching control by Mode/Sync terminal. In addition, unnecessary noise production can be reduced by synchronizing with external CLK in an internal CLK in a range of ± 25%.
In order to protect the IC from thermal destruction, we have three protection functions: accumulation latch protection, thermal shutdown, and short -circuit protection circuit. U.V.L.O (Under Voltage Lock Out) function is built -in, and input voltage 1.8V or less is forcibly turned off the internal driver TR.
The B type has a built -in voltage detector, allowing any voltage monitoring by external resistance.
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