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4.5V to 60V Input, High-Efficiency, Iso-Buck DC-DC Converter

Reduces External Components and Cost for DC-DC Isolation

Product Details

Key Features

Applications/Uses

Parametric specs for Step-Down/Up Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 60
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 60
Switch Type Internal
VOUT1 Tolerance (±%) 1.7
Output Adjust. Method Resistor
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (max) 1.95
# DC-DC Outputs 1
Alternate Topology Step-Down
Step-Up
Switching Frequency (kHz) 200
Design Tools EE-Sim
Package/Pins TDFN/10
Oper. Temp. (°C) -40 to +125
Budgetary
Price (See Notes)
1.73
Parametric specs for Isolated Power Supplies
VIN (V) (min) 4.5
VIN (V) (max) 60
Topology Flyback
Application (VIN) Base Station (24V)
Industrial (24V)
Networking (48V)
Switch Type Internal
Control Loop Current Mode
Feedback Primary Side
Switching Frequency (kHz) 200
Duty Cycle (%) (max) 97.5
Oper. Temp. (°C) -40 to +125
Package/Pins TDFN/10
Budgetary
Price (See Notes)
1.73
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down/Up Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 60
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 60
Switch Type Internal
VOUT1 Tolerance (±%) 1.7
Output Adjust. Method Resistor
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (max) 1.95
# DC-DC Outputs 1
Alternate Topology Step-Down
Step-Up
Switching Frequency (kHz) 200
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=9817', '')
Package/Pins TDFN/10
Oper. Temp. (°C) -40 to +125
Budgetary
Price (See Notes)
1.73
Parametric specs for Isolated Power Supplies
VIN (V) (min) 4.5
VIN (V) (max) 60
Topology Flyback
Application (VIN) Base Station (24V)
Industrial (24V)
Networking (48V)
Switch Type Internal
Control Loop Current Mode
Feedback Primary Side
Switching Frequency (kHz) 200
Duty Cycle (%) (max) 97.5
Oper. Temp. (°C) -40 to +125
Package/Pins TDFN/10
Budgetary
Price (See Notes)
1.73

Key Features

  • Reduces External Components and Total Cost
    • No OptoCoupler
    • Synchronous Primary Operation
    • All-Ceramic Capacitors, Compact Layout
  • Supports Numerous Isolated DC-DC Applications
    • Wide 4.5V to 60V Input
    • Delivers Up to 5W Output Power
  • Reduces Power Dissipation
    • Peak Efficiency > 90%
    • 0.9µA (typ) Shutdown Current
  • Operates Reliably in Adverse Industrial Environments
    • Peak and Sink Current-Limit Protection
    • Robust Secondary-Side Output Overcurrent Protection
    • ±1.7% Feedback Accuracy
    • Programmable EN/UVLO Threshold
    • Adjustable Soft-Start
    • Overtemperature Protection
    • -40°C to +125°C Operation

Applications/Uses

  • Floating Power Supply Generation
  • Isolated Fieldbus Interfaces
  • Isolated Power Supplies in Medical Equipment
  • PLC I/O Modules
  • Smart Meters

Description

The Rainier series of isolated DC-DC products enable small, efficient solutions with a lower BOM cost. The MAX17686 is a high-voltage, high-efficiency, iso-buck DC-DC converter designed to provide isolated power up to 5W. The device operates over a wide 4.5V to 60V input and uses primary-side feedback to regulate the output voltage.

The MAX17686 uses peak-current-mode control. The lowresistance, on-chip MOSFETs ensure high efficiency at full load while simplifying the PCB layout.

The device generates a well regulated primary side voltage which is then scaled by a suitable transformer turns ratio to derive isolated secondary output rails. The MAX17686 features robust overcurrent protection on both the primary and secondary side.

The MAX17686 is available in a compact 10-pin (3mm x 2mm) TDFN package. Simulation model and design automation are available in EE-Sim.

Simplified Block Diagram

MAX17686: Typical Application Circuit MAX17686: Typical Application Circuit Zoom icon

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 .