MAX20094ATID/VY+ Analog Devices

Click here to ask about the production status of specific part numbers. MAX20094/MAX20095 Backup Battery Charger and Boost Controller General Description Benefits and Features The MAX20094/MAX20095 ICs combine a configurable Efficient Solution constant-current/constant-voltage (CC/CV) battery charg- Minimum 2V Sync Boost with n-Channel FET er with a high-efficiency synchronous boost controller to Control supply critical systems in the event the primary power Skip Mode Guarantees > 50% Efficiency at 1mA source is lost. In addition, diagnostic features are available Multiple Functions to Enable Small Solution Size to check battery state-of-health (SOH) and IC functionality. 3V to 6V CC/CV Battery Charger Charging thresholds and the boost output voltage are con- 2 I C-Settable Charging Current Up to 1A figurable to support popular battery chemistries and a 2 I C-Selectable CV Voltage and CC Current Levels wide range of cell counts. To support system integration, Gate-Driver Output for p-Channel Load Disconnect 2 the ICs have an I C slave port through which configuration Backup Battery Switchover-Trigger Signal and status bits can be accessed. State-of-Health for Backup Battery Monitoring Switching frequency of 2.2MHz also helps to reduce sys- 2 I C Interface Diagnostics and Control Interface tem cost by minimizing inductor size. The ICs also include Accurate Internal Current Sink for Battery a precision battery SOH check and have built-in function- Impedance Measurement ality to minimize leakage current out of the backup battery Analog Readout of Internal Sink Current from (BUB). Backup Battery The MAX20094/MAX20095 are available in a 28-pin Remote Sense for BATT Voltage Measurement (5mm x 5mm) side-wettable TQFN package and are Robust for Automotive Environment AECQ-100 qualified. 3.5V to 36V V (40V Load-Dump Tolerant) IN < 1A Leakage for Pins Connected to the Battery Applications -40C to +125C Operating Temperature Range Automotive Telematics Battery Backup 28-Pin, Side-Wettable TQFN Package Enables Single or Multicell Battery-Backup Systems Optical Inspection Ordering Information appears at end of data sheet. 19-100060 Rev 5 10/20MAX20094/MAX20095 Backup Battery Charger and Boost Controller Simplified Block Diagram MBATT1 D1 L2 12V BATTERY OUTPUT 5V TO M3 SYSTEM C8 C9 M2 R1 L1 12V UP TO 3.5A SUPPLY MBATT2 C4 BIAS C3 BST V CSP CSN DDIO DH SDA CSA OSC + SCL LX SLOPE PWM BIAS M1 COMP CONTROL DL FBB EAMP LOGIC BUBTRIG SYSTEM REF COMP MICROCONTROLLER STATUSB SG1 BATTS AVB G1 ISNK AVI EN1B 3.5V TO 6.5V SUP1 SUP1 BATTS BUB 0 TO 6V LITHIUM N.C. CELL, BATTP UP TO 1A CC/CV SUP2 OR NiMH BATTERY CHARGER CELLS 125mA BIAS TO 2A REGULATOR IMON SNK COMP M4 BIAS NEGATIVE G2 CHARGE PUMP AGND PGND www.maximintegrated.com Maxim Integrated 2