Click here for production status of specific part numbers. MAX38886 2.5V to 5.0V, 0.5A/2.5A, Charge/Discharge Regulator for Supercapacitor Backup Applications Benefits and Features General Description 2.5V to 5V System Output Voltage The MAX38886 is a storage capacitor or capacitor bank Up to 4.5V Capacitor Voltage Range backup regulator designed to efficiently transfer power Up to 2.5A Peak Inductor Discharge Current between a storage element and a system supply rail in Programmable Voltage and Current Thresholds reversible buck and boost operations using the same 2% Threshold Accuracy inductor. Up to 95% Efficiency, Charge or Discharge When the main supply is present and above the 2.5A Ready Quiescent Current minimum system supply voltage, the regulator operates Small Solution Size in buck mode and charges the storage element at up to 3mm x 3mm x 0.75mm TDFN Package 500mA peak inductor current. Once the storage element is charged, the circuit draws only 2.5A of current while Ordering Information appears at the end of data sheet. 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 1H inductor. Applications Handheld Industrial Equipment Portable Computers Portable Devices with a Removable Battery Simplified Block Diagram CHARGE DISCHARGE L1 1H V SYS VSC LX CAP SYS SYSTEM LOAD 2.7V (MAX) 10F 3V (MIN) + RSTOP MAIN C2 C1 SUPER 2.49 M 22F BATTERY MAX38886 22F CAP (REMOVABLE) CAPS RCTOP FBS 2.1M FBCH ENABLE EN ISET GND R R R CBOT ISET SBOT 499 k 20k 499 k www.maximintegrated.com 19-100855 Rev 1 8/20 MAX38886 2.5V to 5.0V, 0.5A/2.5A, Charge/Discharge Regulator for Supercapacitor Backup Applications Absolute Maximum Ratings CAP, EN, SYS, LX to GND ................................... -0.3V to +6V Output Short-Circuit Duration .................................. Continuous FBCH to GND ............................................ -0.3V to CAP +0.3V Operating Temperature Range ........................ -40C to +125C FBS, ISET to GND ..................................... -0.3V to SYS +0.3V Storage Temperature Range ........................... -65C to +150C PGND to GND .................................................... -0.3V to +0.3V Maximum Junction Temperature ................................... +150C LX RMS Current ........................................................ +2.0A Lead Temperature (Soldering,10 seconds) ................... +300C RMS Continuous Power Dissipation (T = +70C, TDFN, derate A 24.4mW/C above +70C) ....................................... 1951.2mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Information Package Code T1433+2C Outline Number 21-0137 Land Pattern Number 90-0063 Thermal Resistance, Four-Layer Board: Junction-to-Ambient (JA) 41C/W Junction-to-Case Thermal Resistance ( ) JC 8C/W For the latest package outline information and land patterns (footprints), go to