4.5V to 60V, Synchronous Step-Down Supercapacitor Charger Controller

Wide Input Voltage, High Efficiency, Switching Super Cap Battery Charger

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The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power supply solutions. The MAX17701 is a high efficiency, high voltage, Himalaya synchronous, step-down, supercapacitor charger controller designed to operate over an input-voltage range of a 4.5V to 60V. The MAX17701 operates over a -40°C to +125°C industrial temperature range and charges a supercapacitor with a ±4% accurate constant current. After the supercapacitor is charged, the device regulates the no-load output voltage with ±1% accuracy. The output voltage is programmable from 1.25V up to (VDCIN - 4V).

The MAX17701 supercapacitor charger controller is designed to provide a holistic application solution requiring backup energy storage with a precise charging capability. The device uses an external nMOSFET to provide input supply-side short-circuit protection; thus, preventing supercapacitor discharge.

The MAX17701 provides a safety timer (TMR) feature to set the maximum allowed constant current (CC) mode charging time. The device features an uncommitted comparator, which can be used to detect an output overvoltage event (OVI) and prevent the supercapacitor from overcharging. The MAX17701 is available in a 24-pin 4mm x 4mm TQFN package with an exposed pad.

MAX17701: Typical Application Circuit MAX17701: Typical Application Circuit Enlarge+

Key Features

  • Optimized Feature Set for Supercapacitor Charging
    • ±4% Charging Current Regulation Accuracy
    • ±6% Charging Current Monitor Accuracy (ISMON)
    • ±1% Voltage Regulation Accuracy
    • Programmable CC Mode Charging Current (ILIM)
    • Wide 4.5V to 60V Input-Voltage Range
    • Adjustable Output-Voltage Range from 1.25V Up To (VDCIN - 4V)
    • 125kHz to 2.2MHz Adjustable Frequency with External Clock Synchronization (RT/SYNC)
  • Reliable Operation in Adverse Environmental Conditions
    • Input Short-Circuit Protection (GATEN)
    • Safety Timer Feature (TMR)
    • Output Overvoltage Protection (OVI)
    • Cycle-by-Cycle Overcurrent Limit
    • Programmable EN/UVLO Threshold
    • Fault Monitoring Open-Drain Output (FLG)
    • Overtemperature Protection
    • Wide -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range


  • Peak Power Delivery and Energy Storage
  • Backup Power for Industrial Safety
  • Ride-Through Last-Gasp Supplies
  • Portable Medical Equipment
  • Building and Home Automation Backup Power

See parametric specs for Battery Chargers (74)

Part NumberProtected VIN
Charging VIN
Charge Rate Set byMax. ICHG
Charge TerminationCharge RegulationOper. Temp.
MAX17701 NEW!6060Resistor20Min. Charge CurrentSwitchmode-40 to +125

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.

MAX17701EVKITA: Evaluation Kit for the MAX17701 in 5V Output-Voltage Application
Request Reliability Report for: MAX17701 
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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Type ID Title
Evaluation Board10676MAX17701EVKITA Evaluation Kit for the MAX17701 in 5V Output-Voltage Application