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3A, 2.2MHz, Synchronous Step-Down DC-DC Converter

Compact 3A Automotive DC-DC Solution with EMI Reduction Features

Product Details

Key Features

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Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 3.6
IOUT1 (A) (max) 3
Switch Type Internal
Preset VOUT (V) 3.3
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 2200
Package/Pins TQFN/16
TSSOP/16
Budgetary
Price (See Notes)
4.38
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Simplified Block Diagram

Technical Docs

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Sampling:
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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 3.6
IOUT1 (A) (max) 3
Switch Type Internal
Preset VOUT (V) 3.3
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 2200
Package/Pins TQFN/16
TSSOP/16
Budgetary
Price (See Notes)
4.38

Key Features

  • Small External Components
    • 2.2MHz Operating Frequency
  • Ideal for Point-of-Load Applications
    • 3A Maximum Load Current
    • Adjustable Output Voltage: 0.8V to 3.6V
    • 2.7V to 5.5V Operating Supply Voltage
  • High Efficiency at Light Load
    • 26µA Skip Mode Quiescent Current
  • Minimizes Electromagnetic Interference
    • Programmable SYNC I/O Pin
    • Operates Above AM-Radio Band
    • Available Spread Spectrum
  • Low Power Mode Saves Energy
    • 1µA Shutdown Current
  • Open-Drain Power-Good Output
  • Limits Inrush Current During Startup
    • Soft-Start
  • Overtemperature and Short-Circuit Protections
  • 16-Pin TSSOP-EP and 16-Pin (4mm x 4mm) TQFN-EP Packages
  • -40°C to 125°C Operating Temperature Range

Applications/Uses

  • Automotive Infotainment
  • Industrial/Military
  • Point-of-Load Applications

Description

The MAX16961 is a high-efficiency, synchronous step-down converter that operates with a 2.7V to 5.5V input voltage range and provides a 0.8V to 3.6V output voltage range. The wide input/output voltage range and the ability to provide up to 3A to load current make this device ideal for on-board point-of-load and post-regulation applications. The device achieves -3.7%/+2.6% output error over load, line, and temperature ranges.

The device features a 2.2MHz fixed-frequency PWM mode for better noise immunity and load transient response, and a pulse-frequency modulation mode (skip) for increased efficiency during light-load operation. The 2.2MHz frequency operation allows for the use of all-ceramic capacitors and minimizes external components. The optional spread-spectrum frequency modulation minimizes radiated electromagnetic emissions.

Integrated low RDSON switches improve efficiency at heavy loads and make the layout a much simpler task with respect to discrete solutions.

The device can be offered with factory-preset output voltages, or with an adjustable output voltage (contact factory for preset output-voltage options). Factory-preset output-voltage versions allow customers to achieve -3.7%/+2.6% output-voltage accuracy without using external resistors, while the adjustable output-voltage version provides the flexibility to set the output voltage to any desired value between 0.8V to 3.6V using an external resistive divider.

Additional features include 8ms soft-start, 16ms power-good output delay, overcurrent, and overtemperature protections.

The MAX16961 is available in thermally enhanced 16-pin TSSOP-EP and 16-pin (4mm x 4mm) TQFN-EP packages, and is specified for operation over the -40°C to +125°C automotive temperature range.

Simplified Block Diagram

MAX16961: Typical Application Circuit MAX16961: Typical Application 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.