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ADP1877:  Dual Output Synchronous Buck PWM Controller

Product Details


Newer Alternatives: NEW DESIGNS:
- ADP1850 Wide Range Input, Dual/Two-Phase, DC-to-DC Synchronous Buck Controller
- ADP1829 Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking

The ADP1877 is a Flexmode® (proprietary architecture of Analog Devices, Inc.), dual-channel, step-down switching controller with integrated drivers that drive N-channel synchronous power MOSFETs. The two PWM outputs are phase shifted 180°, which reduces the input RMS current, thus minimizing required input capacitance.

The boost diodes are built into the ADP1877, thus lowering the overall system cost and component count. The ADP1877 can be set to operate in pulse skip high efficiency mode under light load or in PWM continuous conduction mode.

The ADP1877 includes externally adjustable soft start, output overvoltage protection, externally adjustable current limit, power good, and a programmable oscillator frequency that ranges from 200 kHz to 1.5 MHz. The ADP1877 provides an output voltage accuracy of ±0.85% from −40°C to +85°C and ±1.5% from −40°C to 125°C in junction temperature. This part can be powered from a 2.75 V to 14.5 V supply, operates over the −40oC to +125oC junction temperature range, and is availa-ble in a 32-lead 5 mm × 5 mm LFCSP package.

Applications

  • Set top boxes
  • Printers
  • Communication infrastructure
  • Distributor power dc systems
  • Industrial and instrumentation

FEATURES and BENEFITS

  • Input voltage range: 2.75 V to 14.5 V
  • Output voltage range: 0.6 V to 90% VIN
  • Maximum output current greater than 25 A per channel
  • Programmable frequency: 200 kHz to 1.5 MHz
  • Flexmode® architecture with integrated drivers
  • 180° phase shift minimizes input ripple current and required input capacitance
  • ±0.85% output voltage accuracy −40°C to +85°C
  • Please see data sheet for additional features.

ADP1877 Functional Block Diagram

Documentation

Title Content Type File Type
ADP1877: Dual Output Synchronous Buck PWM Controller Datasheet (Rev D, 04/2012) (pdf, 3315 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
UG-247: Evaluating the ADP1877 Step-Down DC-to-DC Controller  (pdf, 1035 kB) User Guides PDF
Synchronous Inverse SEPIC Topology Provides High Efficiency Buck/Boost Voltage Converters
The article describes the inverse SEPIC (single-ended primary inductor converter) topology using the ADP1877, an efficient noninverting dc-to-dc converters that can operate in either buck or boost mode with minimal cost and component count.
(Analog Dialogue, May 2010)
Analog Dialogue HTML
Synchronous Inverse SEPIC Topology Provides High Efficiency Buck/Boost Voltage Converters
The article describes the inverse SEPIC (single-ended primary inductor converter) topology using the ADP1877, an efficient noninverting dc-to-dc converters that can operate in either buck or boost mode with minimal cost and component count.
(Analog Dialogue, May 2010)
Technical Articles HTML
ADP1877 Vin 10.8-13.2V Vout 1.2, 1.8, 3.3, 5V  (pdf, 264 kB)
Four Output Voltages: 1.2 V, 1.8 V, 3.3 V, 5 V; Output Current: 1 A to 3.5 A; Ripple 50 mV ppk; Transient step ±5%, 50% max load
Power Reference Designs PDF
ADP1877 Reference Design  (pdf, 616 kB)
Input 10.8 V to 13.2 V. The output voltages: VOUT1 = 1.2 V 2 A, VOUT2 = 1.8 V 1.8 A, VOUT3 = 3.3 V 1 A, VOUT4 = 5.0 V 2.2 A
Power Reference Designs PDF
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADP1850-77 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
ADIsimPower™ Voltage Regulator Design Tool
This expert design tool produces custom DC-DC converter designs in about a minute. The user enters 5 inputs and chooses to optimize for efficiency, PCB space, cost, or part count. Output is a complete schematic, BOM, efficiency plot, and performance summary. A PDF summary and a blank PCB is offered for each design to facilitate fast prototyping to verify the design.
ADIsim Design/Simulation Tools HTML
Launch of ADIsimPower Voltage Regulator Selection Vin (min) V Vout V   Find Solutions
Vin (max) V Iout A

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADP1877 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADP1877HC-EVALZ Status: Production Evaluation Board $60.00 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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