XD9268 Series
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 XD9268 series has an operating voltage range of 3 V to 36 V, a switching frequency of 2.2 MHz, and the circuit scheme of synchronous rectification to be a highly efficient and stable power supply. An internal reference voltage source of 0.75 V is available, and the output voltage can be set to 1 V to 25 V 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 transistor 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
Features
| Input Voltage Range | 3～36V（Absolute Max 40V） |
|---|---|
| Output Voltage Range | 1.0～25V |
| FB Voltage | 0.75V±1.5% |
| Oscillation Frequency | 2.2MHz |
| Output Current | 600mA |
| Quiescent Current | 13.5μA |
| Control Methods | PWM/PFM Auto Efficiency 82%@12V→5V、1mA |
| Soft-start Time | Adjustable by RC |
| Protection Functions | Over Current Protection(Automatic Recovery) Thermal Shutdown |
| Output Capacitor | Ceramic Capacitor |
| Operating Ambient Temperature | - 40℃ ~ + 105℃ |
| Environmentally Friendly | EU RoHS Compliant, Pb Free |
Packages
| Package | SOT-89-5 | Number of Pins | 5 |
|---|---|---|---|
| Pcs/Reel | 1,000 | Package Size(mm) | 4.5 x 4.6 x 1.6 |
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| Package | USP-6C | Number of Pins | 6 |
|---|---|---|---|
| Pcs/Reel | 3,000 | Package Size(mm) | 1.8 x 2.0 x 0.6 |
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