The XCM520 series is a 600mA synchronous step-down DC/DC converter + dual LDO regulator.
The XCM520 Series is a multi‑chip module that combines a 600 mA synchronous step‑down DC/DC converter with a dual CMOS LDO regulator in a compact USP‑12B01 package. It is designed for space‑conscious applications and can replace separate DC/DC and regulator stages, reducing component count and output noise.
The manual details the device’s pin assignments, electrical characteristics, typical application circuits, and operational features such as soft‑start, current limiting, short‑circuit protection, and EN‑pin control for independent regulator shutdown. Guidance on layout, capacitor selection, and thermal considerations is also included.
| Input Voltage Range | 2.7 V – 6.0 V |
|---|---|
| Output Voltage (VOUT3) | 2.3 V |
| Maximum Output Current | 600 mA |
| Typical Efficiency | 86 % (typ.) |
| Dropout Voltage (LDO) | 100 mV @ 100 mA |
| Stand‑by Current | < 0.1 µA (typ.) |
| Ripple Rejection | 70 dB @ 1 kHz |
The DC/DC block operates with an input voltage from 2.7 V to 6.0 V.
Each regulator’s EN pin can be turned off independently, greatly reducing power consumption.
Low ESR ceramic capacitors are fully compatible and recommended for stable output.
The converter achieves about 86 % efficiency under typical conditions.