The XC9128/XC9129 series are synchronous step-up DC/DC converters with a 0.2 (TYP.) N-channel driver transistor and a synchronous 0.2 (TYP.) P-channel switching transistor built-in. A highly efficient and stable current can be supplied up to 1.0A by reducing ON resistance of the built-in transistors. With a high switching frequency of 1.2MHz, a small inductor is selectable making the series ideally suited for applications requiring low profile or space saving solutions.
The XC9128/XC9129 series are synchronous step‑up DC/DC converters that integrate a 0.2 Ω N‑channel driver transistor and a 0.2 Ω P‑channel switching transistor. They deliver up to 1 A output current with high efficiency, thanks to a fixed 1.2 MHz switching frequency and low ON‑resistance components. The series supports PWM control and automatic PWM/PFM switching, providing low output ripple across a wide load range.
The datasheet includes pin configurations for MSOP‑10 and USP‑10B packages, electrical characteristics, typical application circuits, and protection features such as thermal shutdown and integral latch protection. It also details absolute maximum ratings, recommended external components, and marking conventions for product identification.
| Output Current (150 mA @ 3.3 V, 0.9 V) | 150 mA |
|---|---|
| Input Voltage Range | 0.8 V ~ 6.0 V |
| Oscillation Frequency | 1.2 MHz (fixed) |
| Thermal Shutdown Temperature | 150 °C (typ.) |
| Package Types | MSOP‑10, USP‑10B |
The converters operate at a fixed oscillation frequency of 1.2 MHz.
The series supports an input voltage from 0.8 V up to 6.0 V.
They are offered in MSOP‑10 and USP‑10B surface‑mount packages.