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Dual Step-Down Converters with 6 LDOs for Baseband and Applications Processor

Achieve Smaller Component Size and Board Area with This Integrated Solution

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Multi-Output PMIC in a Compact Package
    • Two 2A Step-Down Converters with Remote Output Voltage Sensing
    • Two 300mA LDOs
    • Four 150mA LDOs
    • < 1µA Shutdown Current
    • 2.32mm x 2.44mm Package
  • Versatile Step-Down Converters
    • Programmable Output Voltage (0.6V to 3.3875V) Through I²C Bus
    • Programmable Output Voltage Slew Rate (12.5mV/µs to 50mV/µs)
    • Dynamic Switching Between Two Output Voltages Through VID_ Pins
  • Efficient Step-Down Converters
    • Over 95% Efficiency with Internal Synchronous Rectifier
    • Automatic Skip Mode at Light Loads
    • Low 61µA (typ) Quiescent Current
    • 5µA (typ) Green Mode per Step-Down Converter
  • Programmable LDOs
    • Programmable Output Voltage (0.8V to 3.95V in 50mV Steps)
    • Programmable Soft-Start Slew Rate (5mV/µs–100mV/µs)
  • Reduces Component Size and Board Area Solution
    • 4.4MHz Step-Down Switching Allows for 1µH Inductors
    • COUT = 1µF for All LDOs
    • Reduced Board Space with Remote Capacitor LDOs
    • Internal Feedback for Step-Down Converters and LDOs

Applications/Uses

  • Cellular Handsets and Smartphones
  • Portable Devices
  • Tablets

Description

The MAX8967 is an µPMIC with two DC-to-DC step-down switching converters and six remote capacitor-capable LDOs. The step-down converters deliver up to 2A of output current independently. Two of the LDOs deliver a load current up to 300mA, while the remaining four deliver up to 150mA. Both step-down converters have remote sense, allowing loads to be placed away from the IC. The IC operates over a 2.6V to 5.5V input supply range.

Fixed-frequency 4.4MHz PWM operation and clocks that are 180° out of phase permit the use of small external components. Under light load conditions, the step-down converters automatically switch to skip mode operation. In skip mode operation, switching occurs only as needed, allowing efficient operation. Placing either of the step-down converters into green mode reduces the quiescent current consumption of that converter to 5µA (typ).

The IC supports dynamic adjustment of the output voltage through its I²C interface. Each step-down converter has two register settings for output voltage and a setting for ramp rate. Also, each step-down converter has a dedicated enable pin and a dedicated VID pin to toggle between the two programmed output voltages. Additionally, an interrupt output is provided, allowing the IC to signal its master.

Simplified Block Diagram

MAX8967: Typical Operating Circuit MAX8967: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.