MAX15048
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MAX15048

Triple-Output Buck Controllers with Tracking/Sequencing

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Low-Cost Triple Buck Controllers with Sequencing and Tracking in Small Form Factor (5mm x 5mm)

Part Details
Features
  • 4.7V to 23V or 5V ±10% Input Voltage Range
  • Triple-Output Synchronous Buck Controllers with 120° Out-of-Phase Operation
  • Prebias Power-Up (MAX15049)
  • Output Voltage Adjustable Down to 0.6V
  • Coincident/Ratiometric Tracking (MAX15048)
  • Accurate Sequencing Through Enable Threshold (MAX15049)
  • External Compensation for Maximum Flexibility
  • Digital Soft-Start (MAX15048/MAX15049) and Soft-Stop (MAX15048)
  • Lossless Valley-Mode Current Sensing Using RDS(ON) of the Low-Side MOSFET
  • PGOOD Output
  • Integrated Bootstrap Diodes
  • Programmable Switching Frequency from 200kHz to 1.2MHz
  • Thermal Shutdown and Hiccup Mode Short-Circuit Protection
  • Space-Saving (5mm x 5mm), 32-Pin TQFN Package
Additional Details
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The MAX15048/MAX15049 are triple-output pulse-width modulated (PWM), step-down, DC-DC controllers with tracking (MAX15048) and sequencing (MAX15049) options. The devices operate over the 4.7V to 23V input-voltage range. Each PWM controller provides an adjustable output down to 0.6V and delivers up to 15A of load current with excellent load and line regulation. The MAX15049 can start into prebiased outputs. The MAX15048/MAX15049 are optimized for high-performance, small-size power-management solutions.

The options of coincident or ratiometric tracking (MAX15048) or output sequencing (MAX15049) allow the tailoring of the power-up/power-down sequence depending on the system requirements. Each of the MAX15048/MAX15049 PWM sections utilizes a voltage-mode control scheme with external compensation, allowing for good noise immunity and maximum flexibility with a wide selection of inductor values and capacitor types. Each PWM section operates at the same fixed switching frequency that is programmable from 200kHz to 1.2MHz. Each converter, operating at up to 1.2MHz with 120° out-of-phase, increases the input capacitor ripple frequency up to 3.6MHz, reducing the RMS input ripple current and thus the size of the input bypass capacitor significantly. The MAX15048/MAX15049 integrate boost diodes for additional system cost savings.

The MAX15048/MAX15049 include internal undervoltage lockout (UVLO) with hysteresis and digital soft-start (MAX15048/MAX15049)/soft-stop (MAX15048) for glitch-free power-up and power-down of the converter. The power-good circuitry (PGOOD) monitors all three outputs and provides a power-good signal to the system control/processor when all outputs are within regulation. Protection features include lossless valley-mode current limit, hiccup mode output short-circuit protection, and thermal shutdown.

The MAX15048/MAX15049 are available in space-saving, 5mm x 5mm, lead-free, 32-pin TQFN-EP packages and are specified for operation over the -40°C to +85°C extended temperature range.

Applications

  • ASIC/CPU/DSP Core and I/O Voltages
  • Base-Station Power Supplies
  • DDR Power Supply
  • Point-of-Load DC-DC Converters
  • RAID Control Power Supplies
  • Set-Top Boxes
  • Telecom and Networking Power Supplies

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX15049EVKIT

Evaluation Kit for the MAX15049

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MAX15049EVKIT

Evaluation Kit for the MAX15049

Evaluation Kit for the MAX15049

Features and Benefits

  • Triple-Output Power Supply
    • VOUT1 (3.3V, 3A)
    • VOUT2 (1.8V, 3A)
    • VOUT3 (1.2V, 6A)
  • 5.5V to 16V Input-Voltage Operation (Design Optimized for 12V Input)
  • Optional 4.5V to 5.5V Input-Voltage Operation
  • 500kHz Switching Frequency per Converter
  • Programmable Switching Frequency Up to 1.2MHz
  • Sequencing Operation (Tracking Possible with Component Changes)
  • PGOOD Power Monitoring
  • Small 1.5in x 1in Circuit Footprint
  • 92.8% Peak Efficiency for OUT1
  • Fully Assembled and Tested

Product Detail

The MAX15049 evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the capabilities of the MAX15049. The MAX15049 is a high-performance, triple-output synchronous buck controller with sequencing capability. The EV kit requires a 5V to 16V (12V, typ) DC input-voltage range for normal operation.

The MAX15049 EV kit outputs are configured for 3.3V, 1.8V, and 1.2V. They provide a load current of 3A, 3A, and 6A, respectively. The EV kit's switching frequency is set to 500kHz, but can be programmed up to 1.2MHz by replacing a resistor. The EV kit comes configured for sequencing (MAX15049) and is capable of prebias startup. The EV kit can also be used to evaluate the MAX15048 for tracking applications by changing a few components. The PGOOD logic signal output pad is provided for circuit monitoring.

The MAX15049 EV kit comes with a MAX15049ETJ+ installed. To evaluate the MAX15048, contact the factory for samples of the pin-compatible MAX15048ETJ+.

Applications

  • ASIC/CPU/DSP Core and I/O Voltages
  • Base-Station Power Supplies
  • DDR Power Supply
  • Point-of-Load DC-DC Converters
  • RAID Control Power Supplies
  • Set-Top Boxes
  • Telecom and Networking Power Supplies

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