MAX16961

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

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


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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.
MAX16961: Typical Application Circuit MAX16961: Typical Application Circuit Enlarge+

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

See parametric specs for Step-Down Switching Regulators (408)


Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingPower Good SignalDC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxmaxSee Notes
MAX16961 2.75.50.83.63.3
Preset
Resistor
3InternalYesYes12200
TQFN/16
TSSOP/16
$3.51 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Request Reliability Report for: MAX16961 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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