Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking
The ADP1823 operates at a pin-selectable, fixed switching frequency of either 300 kHz or 600 kHz, minimizing external component size and cost. For noise sensitive applications, it can also be synchronized to an external clock to achieve switching frequencies between 300 kHz and 1 MHz. The ADP1823 includes soft start protection to prevent inrush current from the input supply during startup, reverse current protection during soft start for precharged outputs, as well as a unique adjustable lossless current-limit scheme using external MOSFET sensing.
For applications requiring power supply sequencing, the ADP1823 also provides tracking inputs that allow the output voltages to track during startup, shutdown, and faults. This feature can also be used to implement DDR memory bus termination.
The ADP1823 is specified over the −40°C to +125°C junction temperature range and is available in a 32-lead LFCSP.
- Telecommunications and networking systems
- Medical imaging systems
- Base station power
- Set-top boxes
- DDR termination
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