The ADP1829ACPZ-R7 is a versatile, dual, interleaved, synchronousPWM buck controller that generates two independent output rails from an input of 3.0 V to 20 V, with power input voltageranging from 1.0 V to 24 V. Each controller can be configured to provide output voltages from 0.6 V to 85% of the inputvoltage and is sized to handle large MOSFETs for point-of-loadregulators. The two channels operate 180° out of phase, reducing stress on the input capacitor and allowing smaller, lowcost components. The ADP1829ACPZ-R7 is ideal for a wide range of high power applications, such as DSP and processor core I/Opower, and general-purpose power in telecommunications,medical imaging, PC, gaming, and industrial applications.
The ADP1829ACPZ-R7 operates at a pin-selectable, fixed switchingfrequency of either 300 kHz or 600 kHz, minimizing external component size and cost. For noise-sensitive applications, it canalso be synchronized to an external clock to achieve switching frequencies between 300 kHz and 1 MHz. The ADP1829includes soft start protection to prevent inrush current from theinput supply during startup, reverse current protection during soft start for precharged outputs, as well as a unique adjustablelossless current-limit scheme utilizing external MOSFET sensing.
For applications requiring power supply sequencing, theADP1829ACPZ-R7 also provides tracking inputs that allow the output voltages to track during startup, shutdown, and faults. Thisfeature can also be used to implement DDR memory bustermination.
The ADP1829ACPZ-R7 is specified over the −40°C to +125°C junction temperature range and is available in a 32-lead LFCSP package.
Feature
- Fixed frequency operation: 300 kHz, 600 kHz, or synchronized operation up to 1 MHz
- Supply input range: 3.0 V to 20V
- Wide power stage input range: 1 V to 24 V
- Interleaved operation results in smaller, low cost input capacitor
- All-N-channel MOSFET design for low cost
- ±0.85% accuracy at 0°C to 70°C
- Soft start, thermal overload, current-limit protection
- 10 µA shutdown supply current
- Internal linear regulator
- Lossless RDSON current-limit sensing
- Reverse current protection during soft start for handling precharged outputs
- Independent Power OK outputs
- Voltage tracking for sequencing or DDR termination
- Available in 5 mm × 5 mm, 32-lead LFCSP
Applications
- Telecommunications and networking systems
- Medical imaging systems
- Base station power
- Set-top boxes
- Printers
- DDR termination
(Picture: Pinout)
