The XCL201/XCL202 series is a synchronous step-down micro DC/DC converter that integrates an inductor and a control IC in one tiny package (2.5mm×2.0mm, h=1.0mm). A stable power supply with an output current of 400mA is configured using only two capacitors connected externally. Operating voltage range is from 2.0V to 6.0V. Output voltage is internally set in a range from 0.8V to 4.0V in increments of 0.05V. The device is operated by 1.2MHz, and includes 0.42ΩP-channel driver transistor and 0.52ΩN-channel switching transistor. As for operation mode, the XCL201 series is PWM control, the XCL202 series is automatic PWM/PFM switching control, allowing fast response, low ripple and high efficiency over the full range of loads (from light load to heavy load). During stand-by, the device is shutdown to reduce current consumption to as low as 1.0μA or less.
The XCL201/XCL202 Series are synchronous step‑down micro DC/DC converters that integrate an inductor and control IC in a 2.5 mm × 2.0 mm × 1.0 mm package. They operate from 2.0 V to 6.0 V input and provide a selectable output voltage from 0.8 V to 4.0 V, delivering up to 400 mA.
Key features include high efficiency (up to 92 % at 4.2 V → 3.3 V), PWM control for the XCL201, automatic PWM/PFM switching for the XCL202, built‑in UVLO, soft‑start, auto‑discharge, and low standby current (≈1 µA). The datasheet provides pin assignments, absolute maximum ratings, and typical application circuits.
| Input Voltage Range | 2.0 V – 6.0 V |
|---|---|
| Output Voltage Range | 0.8 V – 4.0 V |
| Maximum Output Current | 400 mA |
| Efficiency (4.2 V → 3.3 V) | 92 % |
| Oscillation Frequency | 1.2 MHz |
| Stand‑by Current | ≈1 µA |
| Package Size | 2.5 mm × 2.0 mm × 1.0 mm |
The converters operate from 2.0 V to 6.0 V input voltage.
They can supply up to 400 mA of output current.
In standby mode the current consumption is as low as about 1 µA.