MAX38886

2.5V to 5.0V, 0.5A/2.5A, Charge/Discharge Regulator for Supercapacitor Backup Applications

Family of Backup Power Regulators Using Supercapacitor or Capacitor Bank


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Description

The MAX38886 is a storage capacitor or capacitor bank backup regulator designed to efficiently transfer power between a storage element and a system supply rail in reversible buck and boost operations using the same inductor.

When the main supply is present and above the minimum system supply voltage, the regulator operates in buck mode and charges the storage element at up to 500mA peak inductor current. Once the storage element is charged, the circuit draws only 2.5μA of current while it maintains the supercapacitor or other storage element in its ready state. When the main supply is removed, the regulator operates in boost mode and prevents the system from dropping below the minimum operating voltage, discharging the storage element at up to 2.5A peak inductor current.

The MAX38886 is externally programmable for minimum and maximum voltage of the storage element, such as supercapacitor, minimum system voltage, and maximum charge and discharge currents. The internal DC-DC converter requires only a 1µH inductor.

MAX38886: Typical Application Circuit MAX38886:Typical Application Circuit Enlarge+

Key Features

  • 2.5V to 5V System Output Voltage
  • Up to 4.5V Capacitor Voltage Range
  • Up to 2.5A Peak Inductor Discharge Current
  • Programmable Voltage and Current Thresholds
  • ±2% Threshold Accuracy
  • Up to 95% Efficiency, Charge or Discharge
  • 2.5μA Ready Quiescent Current
  • Small Solution Size
    • 3mm x 3mm x 0.75mm TDFN Package

Applications/Uses

  • Handheld Industrial Equipment
  • Portable Computers
  • Portable Devices with a Removable Battery

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.

MAX38886EVKIT: Evaluation Kit for the MAX38886

Tools & Models

  • EE-Sim: Design & Simulate MAX38886
  • Request Reliability Report for: MAX38886 
    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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