MAX15026

Low-Cost, Small, 4.5V to 28V Wide Operating Range, DC-DC Synchronous Buck Controller

Low-Cost, Versatile DC-DC Controller Operates from 4.5V to 28V Suitable for Multiple Applications


Please check latest availability status for a specific part variant.

Description

The MAX15026 synchronous step-down controller operates from a 4.5V to 28V input voltage range and generates an adjustable output voltage from 85% of the input voltage down to 0.6V while supporting loads up to 25A. The device allows monotonic startup into a prebiased bus without discharging the output and features adaptive internal digital soft-start.

The MAX15026 offers the ability to adjust the switching frequency from 200kHz to 2MHz with an external resistor. The MAX15026's adaptive synchronous rectification eliminates the need for an external freewheeling Schottky diode. The device also utilizes the external low-side MOSFET's on-resistance as a current-sense element, eliminating the need for a current-sense resistor. This protects the DC-DC components from damage during output overloaded conditions or output short-circuit faults without requiring a current-sense resistor. Hiccup-mode current limit reduces power dissipation during short-circuit conditions. The MAX15026 includes a power-good output and an enable input with precise turn-on/turn-off threshold, which can be used for input supply monitoring and for power sequencing.

Additional protection features include sink-mode current limit and thermal shutdown.

Sink-mode current limit prevents reverse inductor current from reaching dangerous levels when the device is sinking current from the output.

The MAX15026 is available in a space-saving and thermally enhanced 3mm x 3mm, 14-pin TDFN-EP package. The MAX15026 operates over the extended -40°C to +85°C and automotive -40°C to +125°C temperature ranges.

The MAX15026C is designed to provide additional margin for break-before-make times.

The MAX15026B/MAX15026C provide a soft-stop feature to ramp down the output voltage at turn-off. The soft-stop function is disabled in the MAX15026D.
MAX15026: Functional Diagram MAX15026: Functional Diagram Enlarge+

Key Features

  • 4.5V to 28V or 5V ±10% Input Supply Range
  • 0.6V to (0.85 x VIN) Adjustable Output
  • Adjustable 200kHz to 2MHz Switching Frequency
  • Ability to Start into a Prebiased Load
  • Lossless, Cycle-by-Cycle Valley Mode Current Limit with Adjustable, Temperature-Compensated Threshold
  • Sink-Mode Current-Limit Protection
  • Adaptive Internal Digital Soft-Start
  • ±1% Accurate Voltage Reference
  • Internal Boost Diode
  • Adaptive Synchronous Rectification Eliminates External Freewheeling Schottky Diode
  • Hiccup-Mode Short-Circuit Protection
  • Thermal Shutdown
  • Power-Good Output and Enable Input for Power Sequencing
  • ±5% Accurate Enable Input Threshold
  • AEC-Q100 Qualified (MAX15026B)

Applications/Uses

  • DSP Power Supplies
  • LCD TV Secondary Supplies
  • Points-of-Load Regulators
  • Power Modules
  • Set-Top Boxes
  • Switches/Routers
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingPower Good SignalDC-DC OutputsOper. Freq.
(kHz)
Design ToolsPackage/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX15026 4.5280.628Resistor25ExternalYesYes12000EE-Sim
TDFN/14
$1.30 @1k
See All Step-Down Switching Regulators (367)
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.


MAX15026BEVKIT: Evaluation Kit for the MAX15026B
MAX15026CEVKIT: Evaluation Kit for the MAX15026C

Technical Documents

Tutorial 5133 Power-Supply Solutions for Altera FPGAs
Tutorial 5132 Power-Supply Solutions for Xilinx FPGAs
Reference Schematic 4365 Reference Design Using the MAX15026 for an Auxiliary Power Supply for LCD TVs or Set-Top Boxes

Quality and Environmental Data

Product Reliability Reports: MAX15026.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Topmark Coding MAX15026

Tools & Models

  • EE-Sim: Design & Simulate MAX15026
  • MAX15026 SPICE Macro Model
  • MAX15026 SIMPLIS Schematic
  • CAD Symbols and Footprints

  • MAX15026BATD+
  • MAX15026BATD+T
  • MAX15026BETD+
  • MAX15026BETD+C91
  • MAX15026BETD+T
  • MAX15026BETD+TC91
  • MAX15026BETD/V+
  • MAX15026BETD/V+T
  • MAX15026CATD+
  • MAX15026CATD+T
  • MAX15026CETD+
  • MAX15026CETD+G1D
  • MAX15026CETD+T
  • MAX15026CETD+TG1D
  • MAX15026CETD+TW
  • MAX15026CETD+W
  • MAX15026DATD+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    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.

    Quality Management System >
    Environmental Management System >

     
    Status:
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