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Dual 2.2MHz, Low-Voltage Step-Down DC-DC Converter

Automotive-Grade Dual DC-DC Converter Offers Two 1.5A Rails in a Small Footprint

Product Details

Key Features

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) 1.5
Switch Type Internal
Preset VOUT (V) 1.8
3.3
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 2
Switching Frequency (kHz) 2200
Package/Pins TQFN/16
TQFN-CU/16
TSSOP/16
Budgetary
Price (See Notes)
4.58
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Simplified Block Diagram

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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) 1.5
Switch Type Internal
Preset VOUT (V) 1.8
3.3
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 2
Switching Frequency (kHz) 2200
Package/Pins TQFN/16
TQFN-CU/16
TSSOP/16
Budgetary
Price (See Notes)
4.58

Key Features

  • Small Size Components
    • Dual 2.2MHz DC-DC Converter
  • Ideal for Point-of-Load Applications
    • Up to 1.5A Output Current
    • Adjustable Output Voltage: 0.8V to 3.6V
    • 2.7V to 5.5V Operating Supply voltage
  • High Efficiency at Light Load
    • Skip Mode with 36µA Quiescent Current
  • Low Electromagnetic Emission
    • Programmable SYNC I/O Pin
    • Spread Spectrum
  • Low Power Mode Saves Energy
    • Independent Enable Inputs
  • Output Rail Monitoring Helps Prevent System Failure
    • Open-Drain Power-Good Output
  • Limits Inrush Current During Startup
    • Built-In Soft-Start Timer
  • Overtemperature and Short-Circuit Protections
  • 4mm × 4mm, 16-Pin TQFN and 16-Pin TSSOP Packages
  • -40°C to 125°C Operating Temperature Range

Applications/Uses

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

Description

The MAX16963 is a high-efficiency, dual 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 device delivers up to 1.5A of load current per output. The low input/output voltage range and the ability to provide high output currents make this device ideal for on-board point-of-load and postregulation applications. The device achieves ±3% 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 skip mode for increased efficiency during light-load operation. The 2.2MHz frequency operation allows for an all-ceramic capacitor design and small-size external components. An optional spread-spectrum frequency modulation minimizes radiated electromagnetic emissions due to the switching frequency.

On-board low RDSON switches help minimize efficiency losses at heavy loads and reduce critical/parasitic inductance, making the layout a much simpler task with respect to discrete solutions. Following a simple layout and footprint ensures first-pass success in new designs.

The device is offered in a factory-preset output voltage or adjustable output-voltage version (see the Selector Guide in the full data sheet for options). Factory-preset output-voltage versions allow customers to achieve ±3% 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 and 3.6V using an external resistive divider.

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

The MAX16963 is available in thermally enhanced 16-pin TSSOP-EP and 4mm × 4mm, 16-pin TQFN-EP packages, and is specified for operation over the -40°C to +125°C automotive temperature range.

Simplified Block Diagram

MAX16963: Typical Application Circuit MAX16963: 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 .