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2.5V–5.5V, 3A Reversible Buck/Boost Regulator for Backup Power Applications

Continua™ Family of Backup Power Regulators Using Super Capacitor or Capacitor Bank

Product Details

Key Features

Parametric specs for Battery Chargers
Charging VIN (V) (max) 5.5
Max. ICHG (A) 3
Cell Chemistry Supercapacitor
Charger (V) 0.5 to 5.5
Oper. Temp. (°C) -40 to +125
Package/Pins TQFN-CU/16
Budgetary
Price (See Notes)
2.45
Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 0.5
VIN (V) (max) 5.5
VOUT1 (V) (min) 2.5
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 3
Switch Type Internal
Output Adjust. Method Resistor
IQ (mA) (typ) 0.075
Shutdown Mode Supply Current (µA) (typ) 0.001
Shutdown Mode Supply Current (µA) (max) 1
# DC-DC Outputs 1
Design Tools EE-Sim
Package/Pins TQFN-CU/16
Budgetary
Price (See Notes)
2.45
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Simplified Block Diagram

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Parameters

Parametric specs for Battery Chargers
Charging VIN (V) (max) 5.5
Max. ICHG (A) 3
Cell Chemistry Supercapacitor
Charger (V) 0.5 to 5.5
Oper. Temp. (°C) -40 to +125
Package/Pins TQFN-CU/16
Budgetary
Price (See Notes)
2.45
Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 0.5
VIN (V) (max) 5.5
VOUT1 (V) (min) 2.5
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 3
Switch Type Internal
Output Adjust. Method Resistor
IQ (mA) (typ) 0.075
Shutdown Mode Supply Current (µA) (typ) 0.001
Shutdown Mode Supply Current (µA) (max) 1
# DC-DC Outputs 1
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=29529', '')
Package/Pins TQFN-CU/16
Budgetary
Price (See Notes)
2.45

Key Features

  • 2.5V to 5.5V System Output Voltage Range
  • 0.5V to 5.5V Supercapacitor Voltage Range
  • ±1% Threshold Accuracy
  • 2.5% Hysteresis between Backup and Charging
  • 1A to 3A Peak Inductor Current Limit
    • Peak Inductor Current Is Pin-Programmable over 1A to 3A through External Resistor
  • 94% Peak Efficiency, Charging or Discharging Mode
  • 4µA Quiescent Current in Ready State
    • After Supercapacitor Is Charged, Draws only 4µA of Quiescent Current
  • Ready and Backup State Outputs
    • RDY and BKB Flags Provide Real-Time Status to System
  • 3mm x 3mm, 16-Pin TQFN Package

Applications/Uses

  • Aftermarket Automotive Tracking
  • Handheld Industrial Equipment
  • Industrial Sensor and Actuators
  • Portable Devices/Computers with Removable Battery

Description

Simplified Block Diagram

MAX38889: Simplified Application Diagram MAX38889: Simplified Application Diagram Zoom icon

Technical Docs

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 .