36V Operation 0.6A Synchronous Step-Down DC/DC Converters
The XC9268 series are 36V operation synchronous step-down DC/DC converter ICs with a built-in P-channel MOS driver transistor and N-channel MOS switching transistor. The XC9268 series has operating voltage range of 3.0V～36.0V and high-efficiency power supply up to an output current of 0.6A. Low ESR capacitors such as ceramic capacitors can be used for the load capacitor (CL).
A 0.75V reference voltage source is incorporated in the IC, and the output voltage can be set to a value from 1.0V to 25.0V usingexternal resistors (RFB1,RFB2).
1.2MHz or 2.2MHz can be selected for the switching frequency. In automatic PWM/PFM control, the IC operates by PFM control when the load is light to achieve high efficiency over the full load range from light to heavy.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 transistor is forced OFF when input voltage becomes 2.7V or lower.The output state can be monitored using the power good function. Internal protection circuits include over current protection, short-circuit protection, and thermal shutdown circuits to enable safe use.
Typical Application Circuit
|Input Voltage Range||3.0 ~ 36V (Absolute Max 40V)|
|Output Voltage Range||1.0 ~ 25V|
|FB Voltage||0.75V ± 1.5%|
|Oscillation Frequency||1.2MHz, 2.2MHz|
|Quiescent Current||12.5μA (1.2MHz)
|Control Methods||PWM/PFM Auto
|Soft-start Time||Adjustable by RC|
|Protection Circuits||Over Current Protection
|Output Capacitor||Ceramic Capacitor|
|Operating Ambient Temperature||- 40℃ ~ + 105℃|
|Environmentally Friendly||EU RoHS Compliant, Pb Free|
|Package||SOT-89-5||Number of Pins||5|
|Pcs/Reel||1,000||Package Size(mm)||4.5 x 4.6 x 1.5|
|Package||USP-6C||Number of Pins||6|
|Pcs/Reel||3,000||Package Size(mm)||1.8 x 2.0 x 0.6|