The ADP1829 is a versatile, dual, interleaved, synchronous
PWM buck controller that generates two independent output rails from an input of 3.0 V to 20 V, with power input voltage
ranging from 1.0 V to 24 V. Each controller can be configured to provide output voltages from 0.6 V to 85% of the input
voltage and is sized to handle large MOSFETs for point-of-load
regulators. The two channels operate 180° out of phase, reducing stress on the input capacitor and allowing smaller, low
cost components. The ADP1829 is ideal for a wide range of high power applications, such as DSP and processor core I/O
power, and general-purpose power in telecommunications,
medical imaging, PC, gaming, and industrial applications.
The ADP1829 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 ADP1829
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 utilizing external MOSFET sensing.
For applications requiring power supply sequencing, the
ADP1829 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 ADP1829 is specified over the −40°C to +125°C junction temperature range and is available in a 32-lead LFCSP package.
Applications
- Telecommunications and networking systems
- Medical imaging systems
- Base station power
- Set-top boxes
- Printers
- DDR termination
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