A7442

AiT Semiconductor Inc. www.ait-ic.com A7442 DC-DC CONVERTER/ BUCK (STEP-DOWN) 40V, 4.2AHIGHPERFORMANCECV/CCQUICKCHARGERSYNCHRONOUS DESCRIPTION AP7442 is a High Efficiency Synchronous DC-DC Buck Converters with CV / CC modes, which can output up to 4.2 A in a wide input range from 6 V to 36 V. The A7442 operates either in CV (Constant Voltage) mode or CC (Constant Current) mode. With the CV / CC mode, adjustable current limit and output voltage, the A7442 is particularly suitable for QC 2.0 / 3.0 (12V / 1.5A, 9V / 2A and 5V / 3A), Type-C PD (5 V / 3 A) and Apple portable device (5V / 2.4A) applications. The output voltage and CC limit can be programed through the FB, CSP and CSN pins respectively. In order to achieve better EMI performance and comply with Apple’s MFi standard, the switching frequency was fixed at 130kHz. A7442 is capable to operate in CC mode down to 3V output voltage to protect the soft-short condition that is from the over current of the portable device A discharg...