MAX20095

Backup Battery Charger and Boost Controller

Integrated Backup Battery Charger and Boost Controller


Please check latest availability status for a specific part variant.

Description

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 slave 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.

Key Features

  • 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 VIN (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

Applications/Uses

  • Automotive Telematics Battery Backup
  • Single or Multicell Battery-Backup Systems
Part NumberLithium Ion CellsProtected VIN
(V)
Charging VIN
(V)
Charge Rate Set byMax. ICHG
(A)
Charge TerminationCharge RegulationOper. Temp.
(°C)
Package/PinsBudgetary
Price
maxmaxSee Notes
MAX20094 177I2C/SMBus1
Current Limit
External Control
Max. Voltage
Min. Charge Current
Smart Battery Control
Linear
-55 to +125
-40 to +85
-40 to +125
TQFN/28
$2.96 @1k
MAX20095 
TQFN/28
See All Battery Chargers (74)
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.


MAX20094EVKIT: Evaluation Kit for the MAX20094/MAX20095
MAX20094EVSYS: Evaluation Kit for the MAX20094/MAX20095
MAX20095EVKIT: Evaluation Kit for the MAX20094/MAX20095
MAX20095EVSYS: Evaluation Kit for the MAX20094/MAX20095
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

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.

Quality Management System >
Environmental Management System >

 
Status:
Package:
Temperature:

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