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ADP1829:  Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking

Product Details


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

FEATURES and BENEFITS

  • Fixed frequency operation: 300 kHz, 600 kHz, or synchronized operation up to 1 MHz
  • Supply input range: 3.0 V to 20 V
  • 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

Typical Application Circuit for ADP1829

Documentation

Title Content Type File Type
ADP1829: Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking Data Sheet (Rev C, 10/2012) (pdf, 685 kB) Data Sheets PDF
Introduction to ADIsimPower
ADIsimPower is a smart selector and a collection of downloadable tools that produce complete and optimized power designs. Schematic, bill of materials, and performance data are customized to your specific needs in minutes.
Videos HTML
ADP1829 & ADP1864 Reference Design  (pdf, 142 kB)
Three Output Voltages: 1.24 V, 3.3 V, 5 V; Output Current: 2 A to 4 A; Input voltage: 10.8-13.2 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load
Power Reference Designs PDF
ADP1829 Reference Design  (pdf, 1793 kB)
Two Output Voltages: 3.3 V, 1.0 V; Output Current: 3.0 A, 8.0 A; Input voltage: 10.8 V – 13.2 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load
Power Reference Designs PDF
ADP1829, ADP210x, ADP171x Reference Design  (pdf, 447 kB)
Seven Output Voltages: 5.0 V, 3.6 V, 3.3 V, 2.5 V, 1.8 V, 1.2 V, 0.9 V; Output Current: 0.002 A to 3.0 A; Input voltage: 10.8-13.2 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load
Power Reference Designs PDF
ADP1829 and ADP1715 Reference Design  (pdf, 166 kB)
Five Output Voltages: 5.0 V, 3.3 V, 3.3 V low noise, 2.5 V, 1.3 V; Output Current: 0.005 A to 1.65 A; Input voltage: 8-16 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load
Power Reference Designs PDF
ADP1829, ADP210x and ADP171x Reference Design  (pdf, 687 kB)
Seven Output Voltages: 3.6 V, 3.3 V,3.3l V 2.5 V, 1.8 V, 1.25 V, 0.9 V; Output Current: 0.002 A to 3.0 A; Input voltage: 10.8-13.2 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load
Power Reference Designs PDF
ADP1829 Reference Design  (pdf, 287 kB)
Five Output Voltages: 1.0V, 1.8V, 3.3V x 2, 5V; Output Current: 0.7A to 2.8A; Input voltage: 9-12V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load
Power Reference Designs PDF
ADP1829 Reference Design  (pdf, 172 kB)
Four Output Voltages: 7.0 V, 3.3 V, 1.8 V, 1.2 V; Output Current: 1.6 A to 12.6 A; Input voltage: 19-21 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load
Power Reference Designs PDF
ADP1829 & ADP1821 Reference Design  (pdf, 309 kB)
Five Output Voltages: 1.2 V, 1.8 V, 3.3 V, 5 V, 12 V; Output Current: 1 A to 4.5 A; Input voltage: 15.2-16.8 V; Ripple 50 mV ppk; Transient step ±5%, 50% max load
Power Reference Designs PDF
ADP1829 Reference Design  (pdf, 555 kB)
Two Output Voltages: 5.0 V, 3.3 V; Output Current: 3 A; Input voltage: 8.0-16.0 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load
Power Reference Designs PDF
ADP1829 Reference Design  (pdf, 574 kB)
Two Output Voltages: 5.0 V, 3.3 V; Output Current: 3 A; Input voltage: 8.0-16.0 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load
Power Reference Designs PDF
ADP1829 Reference Design  (pdf, 679 kB)
Two Output Voltages: 5.0 V, 3.3 V; Output Current: 1.5 A, 2.6 A; Input voltage: 10.8 V-13.2 V; Ripple 12 mV ppk; Transient step ±5%, 50% max load
Power Reference Designs PDF
Industrial ICs
Industrial ICs Solutions Bulletin, Volume 10, Issue 8
Solutions Bulletins HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADP182x Buck Designer Tool  (zip, 0)
Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
ADIsim Design/Simulation Tools ZIP
Download files for ADIsimPower™ Voltage Regulator Design Tool
The individual Excel-based voltage regulator design tools used in ADIsimPower™.
ADIsim Design/Simulation Tools HTML
Launch of ADIsimPower Voltage Regulator Selection Vin (min) V Vout V   Find Solutions
Vin (max) V Iout A

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ADP1829-EVALZ Status: Production Evaluation Board $60.72 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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