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ADP5041:  Micro PMU with 1.2 A Buck, Two 300 mA LDOs, Supervisory, Watchdog and Manual Reset

Product Details

Product Status:Recommended for New Designs

The ADP5041 combines one high performance buck regulator and two low dropout regulators (LDO) in a small 20-lead LFCSP to meet demanding performance and board space requirements.

The high switching frequency of the buck regulator enables use of tiny multilayer external components and minimizes board space.

When the MODE pin is set to logic high, the buck regulator operates in forced PWM mode. When the MODE pin is set to logic low, the buck regulator operates in PWM mode when the load is around the nominal value. When the load current falls below a predefined threshold, the regulator operates in power save mode (PSM), improving the light load efficiency. The low quiescent current, low dropout voltage, and wide input voltage range of the ADP5041 LDOs extend the battery life of portable devices. The ADP5041 LDOs maintain a power supply rejection greater than 60 dB for frequencies as high as 10 kHz while operating with a low headroom voltage.

Each regulator in the ADP5041 is activated by a high level on the respective enable pin. The output voltages of the regulators and the reset threshold are programmed through external resistor dividers to address a variety of applications. The ADP5041 contains supervisory circuits that monitor power supply voltage levels and code execution integrity in microprocessor-based systems. They also provide power-on reset signals. An on-chip watchdog timer can reset the microprocessor if it fails to strobe within a preset timeout period.

FEATURES and BENEFITS

  • Input voltage range: 2.3 V to 5.5 V
  • One 1.2 A buck regulator
  • Two 300 mA LDOs
  • 20-lead, 4 mm × 4 mm LFCSP package
  • Overcurrent and thermal protection
  • Soft start
  • Undervoltage lockout
  • Open-drain processor reset with externally adjustable threshold monitoring
  • Guaranteed reset output valid to VAVIN = 1 V
  • Manual reset input
  • Watchdog refresh input
  • Buck key specifications
    Please see data sheet for additional information.
  • LDOs key specifications
    Please see data sheet for additional information.

Functional Block Diagram for ADP5041

Documentation

Title Content Type File Type
ADP5041: Micro PMU with 1.2 A Buck, Two 300 mA LDOs Supervisory, Watchdog and Manual Reset Preliminary Data Sheet (Rev 0, 01/2012) (pdf, 2620 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
Multi-output Regulators with Supervisory and Watchdog Timers Reduce Component Count, Increase Power Density and Reliability (23 Jan 2012) Press Releases HTML
Integrated Power Solutions for Xilinx FPGAs  (pdf, 2253 kB)
Combining multiple switching regulators and LDOs into a single package enables very small, flexible, highly efficient power management solutions for powering FPGAs.
Solutions Bulletins PDF
Integrated Power Solutions for Altera FPGAs  (pdf, 2460 kB) Solutions Bulletins PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

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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.

ADP5041 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADP5041CP-1-EVALZ Status: Production Evaluation Board $49.00 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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