The XC9301/XC9302 series are step-up/down DC/DC converter controller ICs with fast, low ON resistance drivers built-in
The XC9301/XC9302 series are step‑up/down DC/DC converter controller ICs with built‑in fast, low‑ON‑resistance drivers. They can be used in mobile phones, PDAs, portable audio equipment and various power‑supply applications, requiring only four basic external components (two transistors, an inductor, two diodes and capacitors).\n\nKey features include selectable output voltage from 2.4 V to 6.0 V in 0.1 V steps, switching frequencies of 180 kHz or 300 kHz, PWM to PFM mode transition for light loads, a 10 ms soft‑start, and standby current as low as 0.5 µA. The datasheet provides detailed pin assignments, electrical ratings, and typical performance curves.
| Input Voltage Range | 2.0 V – 10 V |
|---|---|
| Output Voltage Range | 2.4 V – 6.0 V (±2.5 % accuracy) |
| Oscillation Frequency | 180 kHz or 300 kHz |
| Maximum Output Current | 250 mA (V IN=2.4 V, V OUT=3.3 V) |
| Efficiency (typical) | 81 % @ V OUT=5.0 V, 78 % @ V OUT=3.3 V |
| Stand‑by Current | 0.5 µA (max) |
| Soft‑Start Time | 10 ms (typical) |
| Maximum Duty Cycle | 85 % (typical) |
The devices operate at either 180 kHz or 300 kHz, selectable by the designer.
Stand‑by current can be reduced to as little as 0.5 µA.
The internal soft‑start time is set to 10 ms.
The ICs are supplied in an SOT‑25 package.