Analog Devices MAX20095 Product Info

• Efficient Solution
  • Minimum 2V Sync Boost with n-Channel FET Control
  • Skip Mode Guarantees > 50% Efficiency at 1mA
• Multiple Functions to Enable Small Solution Size
  • 3V to 6V CC/CV Battery Charger
  • I²C-Settable Charging Current up to 1A
  • I²C-Selectable CV Voltage and CC Current Levels
  • Gate-Driver Output for p-Channel Load Disconnect
  • Backup Battery Switchover-Trigger Signal
• State-of-Health for Backup Battery Monitoring
  • I²C Interface Diagnostics and Control Interface
  • Accurate Internal Current Sink for Battery Impedance Measurement
  • Analog Readout of Internal Sink Current from Backup Battery
  • Remote Sense for BATT_ Voltage Measurement
• Robust for Automotive Environment
  • 3.5V to 36V V_IN (40V Load-Dump Tolerant)
  • < 1µA Leakage for Pins Connected to the Battery
  • -40°C to +125°C Operating Temperature Range
  • 28-Pin, Side-Wettable TQFN Package Enables Optical Inspection

The MAX20094/MAX20095 ICs combine a configurable constant-current/constant-voltage (CC/CV) battery charger with a high-efficiency synchronous boost controller to supply critical systems in the event the primary power source is lost. In addition, diagnostic features are available to check battery state-of-health (SOH) and IC functionality. Charging thresholds and the boost output voltage are configurable to support popular battery chemistries and a wide range of cell counts. To support system integration, the ICs have an I²C target port through which configuration and status bits can be accessed.

Switching frequency of 2.2MHz also helps to reduce system cost by minimizing inductor size. The ICs also include a precision battery SOH check and have built-in functionality to minimize leakage current out of the backup battery (BUB).

The MAX20094/MAX20095 are available in a 28-pin (5mm x 5mm) side-wettable TQFN package and are AECQ-100 qualified.

Applications

• Automotive Telematics Battery Backup
• Single or Multicell Battery-Backup Systems