LTC4370CMS#PBF Analog Devices

LTC4370 Two-Supply Diode-OR Current Balancing Controller Fea T Descrip T n Shares Load Between Two Supplies The LTC 4370 is a two-supply current sharing controller n Eliminates Need for Active Control of which incorporates MOSFET ideal diodes. The diodes Input Supplies block reverse and shoot-through currents during start-up n No Share Bus Required and fault conditions. Their forward voltage is adjusted to n Blocks Reverse Current share the load currents between supplies. Unlike other n No Shoot-Through Current During Start-Up or Faults sharing methods, neither a share bus nor trim pins on n 0V to 18V High Side Operation the supply are required. n Enable Inputs The maximum MOSFET voltage drop can be set with a n MOSFET On Status Outputs resistor. A fast gate turn-on reduces the load voltage n Dual Ideal Diode Mode droop during supply switchover. If the input supply fails n 16-Lead DFN (4mm 3mm) and MSOP Packages or is shorted, a fast turn-off minimizes reverse current transients. a T The controller operates with supplies from 2.9V to 18V. n Redundant Power Supplies For lower rail voltages, an external supply is needed at n High Availability Systems and Servers the V pin. Enable inputs can be used to turn off the CC n Telecom and Network Infrastructure MOSFET and put the controller in a low current state. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Status outputs indicate whether the MOSFETs are on or PowerPath and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 7920013 and off. The load sharing function can be disabled to turn the 8022679. Additional patent pending. LTC4370 into a dual ideal diode controller. Typical a T 12V, 10A Load Share Current Sharing Error vs Supply Difference SUM85N03-06P V INA 12V 20 39nF* 15 10 EN1 CPO1 V GATE1 IN1 OUT1 5 V CC 2m FETON1 0.1F OUT 0 GND LTC4370 12V, 10A FETON2 2m 5 NC RANGE OUT2 10 EN2 CPO2 V GATE2 COMP IN2 15 0.18F 39nF* 20 750 500 250 0 250 500 750 V INB V V (mV) INA INB 4370 TA01 4370 TA01b 12V SUM85N03-06P *OPTIONAL, FOR FAST TURN-ON 4370f 1 SHARING ERROR (I I )/I (%) VINA VINB L ion pplica ions pplica ion uresLTC4370 a T e Maxi Mu M r a T (Notes 1, 2) V , V , OUT1, OUT2 Voltages ...................2V to 24V FETON1, FETON2 Currents .......................................5mA IN1 IN2 V Voltage ............................................... 0.3V to 6.5V Operating Ambient Temperature Range CC GATE1, GATE2 Voltages (Note 3) ............... 0.3V to 34V LTC4370C ................................................ 0C to 70C CPO1, CPO2 Voltages (Note 3) ................... 0.3V to 34V LTC4370I .............................................40C to 85C RANGE Voltage ................................0.3V to V + 0.3V Storage Temperature Range .................. 65C to 150C CC COMP Voltage .............................................. 0.3V to 3V Lead Temperature (Soldering, 10 sec) EN1, EN2, FETON1, FETON2 Voltages .........0.3V to 24V MS Package ......................................................300C CPO1, CPO2 Average Current .................................10mA p c F T TOP VIEW EN2 1 16 EN1 TOP VIEW RANGE 2 15 GND EN2 1 16 EN1 COMP 3 14 V CC RANGE 2 15 GND COMP 3 14 V V 4 13 V CC IN2 17 IN1 V 4 13 V IN2 IN1 GATE2 5 12 GATE1 GATE2 5 12 GATE1 CPO2 6 11 CPO1 CPO2 6 11 CPO1 OUT2 7 10 OUT1 OUT2 7 10 OUT1 FETON2 8 9 FETON1 FETON2 8 9 FETON1 MS PACKAGE 16-LEAD PLASTIC MSOP DE PACKAGE 16-LEAD (4mm 3mm) PLASTIC DFN T = 125C, = 125C/W JMAX JA T = 125C, = 43C/W JMAX JA EXPOSED PAD (PIN 17) PCB GND CONNECTION IS OPTIONAL o r D i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4370CDE PBF LTC4370CDE TRPBF 4370 16-Lead (4mm 3mm) Plastic DFN 0C to 70C LTC4370IDE PBF LTC4370IDE TRPBF 4370 16-Lead (4mm 3mm) Plastic DFN 40C to 85C LTC4370CMS PBF LTC4370CMS TRPBF 4370 16-Lead Plastic MSOP 0C to 70C LTC4370IMS PBF LTC4370IMS TRPBF 4370 16-Lead Plastic MSOP 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: