The XC9515 series is a 2-channel synchronous step-down DC/DC converter with a built-in voltage detector and delay circuit. It delivers highly efficient and stable output current up to 800mA. With high switching frequencies, it allows the use of small inductors. The series features an under-voltage lock-out function and a voltage detector with freely adjustable delay time. It is suitable for applications such as DVDs, Blu-ray discs, LCD TVs, and LCD modules.
The XC9515 series from Torex provides two independent synchronous step‑down converters in a compact QFN‑20 package. It is intended for use in DVDs, Blu‑ray disks, LCD TVs, multifunction printers, photo printers and set‑top boxes, offering flexible voltage settings and a built‑in manual reset function.
Key features include an input range of 2.5 V‑5.5 V, selectable output voltages from 1.2 V to 4.0 V, a fixed 1 MHz switching frequency, UVLO protection (1.8 V typical for series B, 2.7 V for series A), and high efficiency up to 95 % at 5 V → 3.3 V conversion. The device integrates P‑channel driver and N‑channel synchronous switch transistors, thermal shutdown, over‑current latch, and a voltage‑detector block with programmable delay.
| Input Voltage Range | 2.5 V – 5.5 V |
|---|---|
| Output Voltage Range | 1.2 V – 4.0 V (each channel) |
| Maximum Output Current | 800 mA per channel |
| Efficiency | 95 % (V IN=5 V, V OUT=3.3 V) |
| Switching Frequency | 1 MHz |
| UVLO Voltage (typical) | 1.8 V (Series B) / 2.7 V (Series A) |
| Package | QFN‑20 |
| Manual Reset Function | Provides reset signal on demand |
Each channel can deliver up to 800 mA of output current.
The converter operates at a fixed 1 MHz switching frequency.
Yes, it includes a manual reset function that can generate a reset signal at any time.