XD9707 Series

Qualified for automotive applications up to 125℃ Ta, 36V & 600mA Synchronous Step-Down DC/DC Converters

The XD9707 series are 36V operation synchronous step-down DC/DC converter ICs with a built-in P-channel MOS driver FET and N-channel MOS switching FET. The XD9707 series has an operating voltage range of 3V to 36V, a switching frequency of 2.2MHz, and the circuit scheme of synchronous rectification to be a highly efficient and stable power supply. An internal reference voltage source of 0.75V is available, and the output voltage can be set to 1.8V to 12V by external resistors (RFB1, RFB2).

The soft-start time is internally set to 2.0ms (TYP.), but can be adjusted to set a longer time using an external resistor and capacitor. With the built-in UVLO function, the driver FET is forced OFF when input voltage becomes 2.7V or lower.

The output state can be monitored using the power good function. Over-current protection and thermal shutdown are built in as protection function, and it can be used safely even in the case of short circuit. Internal protection circuits include over current protection and thermal shutdown circuits to enable safe use.

Typical Application Circuit


Input Voltage Range 3.0~36V(Absolute Max 40V)
Output Voltage Range 1.8V ~ 12.0V
FB Voltage 0.75V±1.5%
Oscillation Frequency 2.2MHz
Output Current 600mA
Control Methods PWM Control
Efficiency 88%@12V→5V,300mA
Soft-start Time Adjustable by RC
Protection functions Over Current Protection(Automatic Recovery)
Thermal Shutdown
Output Capacitor Ceramic Capacitor
Operating Ambient Temperature - 40℃ ~ + 125℃
Environmentally Friendly EU RoHS Compliant, Pb Free



Technical Document