XC6365/XC6366 Series PWM Controlled, PWM/PFM Switchable Step-Down DC/DC Controllers
The XC6365/XC6366 series are multi‑functional step‑down DC/DC controllers with up to 1 A output current, programmable output voltage from 1.5 V to 6.0 V, and a 300 kHz switching frequency that allows small external components. The XC6366 variant can switch between PWM and PFM operation for efficient performance under light loads, while the XC6365 operates in PWM mode.
Key features include a standby current of less than 0.5 µA, internal UVLO protection, soft‑start timing configurable from 10 ms to 20 ms, and RoHS‑compliant SOT‑25 and USP‑6C packages. The datasheet lists detailed pin assignments, electrical characteristics, typical application circuits, and marking rules for product identification.
| Input Voltage Range | 2.2 V – 10 V |
|---|---|
| Output Voltage Range | 1.5 V – 6.0 V (0.1 V steps) |
| Switching Frequency | 300 kHz (±15%) |
| Maximum Output Current | > 1 A |
| Stand‑by Current | < 0.5 µA |
| Efficiency | ≈ 92 % |
The standby current is less than 0.5 µA.
They operate at a switching frequency of 300 kHz (±15%).
Yes, the XC6366 variant is PWM/PFM switchable, while the XC6365 operates in PWM mode only.