LT6109-1/LT6109-2 High Side Current Sense Amplifier with Reference and Comparators FEATURES DESCRIPTION n Current Sense Amplifier The LT 6109 is a complete high side current sense device Fast Step Response: 500ns that incorporates a precision current sense amplifier, an Low Offset Voltage: 125V Maximum integrated voltage reference and two comparators. Two Low Gain Error: 0.2% Maximum versions of the LT6109 are available. The LT6109-1 has n Internal 400mV Precision Reference the comparators connected in opposing polarity and the n Internal Latching Comparators with Reset LT6109-2 has the comparators connected in the same polar- Fast Response Time: 500ns ity. In addition, the current sense amplifier and comparator Total Threshold Error: 1.25% Maximum inputs and outputs are directly accessible. The amplifier Two Comparator Polarity Options gain and comparator trip points are configured by external n Wide Supply Range: 2.7V to 60V resistors. The open-drain comparator outputs allows for n Supply Current: 550A easy interface to other system components. n Low Shutdown Current: 5A Maximum The overall propagation delay of the LT6109 is typically n Specified for 40C to 125C Temperature Range only 1.4s, allowing for quick reaction to overcurrent n Available in 10-Lead MSOP Package and undercurrent conditions. The 1MHz bandwidth al- lows the LT6109 to be used for error detection in critical applications such as motor control. The high threshold APPLICATIONS accuracy of the comparators, combined with the ability to n Overcurrent, Undercurrent and Fault Detection latch both comparators, ensures the LT6109 can capture n Current Shunt Measurement high speed events. n Battery Monitoring The LT6109 is fully specified for operation from 40C to n Motor Control 125C, making it suitable for industrial and automotive ap- n Automotive Monitoring and Control plications. The LT6109 is available in a small 10-lead MSOP. n Remote Sensing L, LT, LTC, LTM, TimerBlox, Linear Technology and the Linear logo are registered trademarks n Industrial Control of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Response to Overcurrent Event Circuit Fault Protection with Latching Load Disconnect and Early Warning Indication 0.1 IRF9640 12V TO LOAD V LOAD 0.1F 6.2V* 10V/DIV 1k 100 3.3V 0V SENSEHI SENSELO + V V OUTA OUT I 10k 1.62k 100k LOAD LT6109-2 6.04k 200mA/DIV 0mA RESET EN/RST INC2 V 1k 100mA WARNING OUTC1 250mA DISCONNECT 2.37k OUTC2 5V/DIV 0V 250mA DISCONNECT V OUTC2 2N2700 OUTC1 INC1 100mA WARNING 5V/DIV V 0V 1.6k 610912 TA01a 610912 TA01b 5s/DIV *CMH25234B 610912fa 1LT6109-1/LT6109-2 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) + TOP VIEW Total Supply Voltage (V to V ) .................................60V SENSELO 1 10 SENSEHI Maximum Voltage + EN/RST 2 9 V + OUTC2 3 8 OUTA (SENSELO, SENSEHI, OUTA) ............................... V + 1V OUTC1 4 7 INC2 + Maximum V (SENSELO or SENSEHI) ....................33V V 5 6 INC1 Maximum EN/RST Voltage ........................................60V MS PACKAGE 10-LEAD PLASTIC MSOP Maximum Comparator Input Voltage ........................60V = 160C/W, = 45C/W JA JC Maximum Comparator Output Voltage......................60V Input Current (Note 2) ..........................................10mA SENSEHI, SENSELO Input Current ....................... 10mA Differential SENSEHI or SENSELO Input Current ...2.5mA Amplifier Output Short-Circuit Duration (to V ) .. Indenfi ite Operating Temperature Range (Note 3) LT6109I ................................................40C to 85C LT6109H ............................................ 40C to 125C Specified Temperature Range (Note 3) LT6109I ................................................40C to 85C LT6109H ............................................ 40C to 125C Maximum Junction Temperature .......................... 150C Storage Temperature Range .................. 65C to 150C Lead Temperature (Soldering, 10 sec) ...................300C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT6109AIMS-1 PBF LT6109AIMS-1 TRPBF LTFNJ 10-Lead Plastic MSOP 40C to 85C LT6109IMS-1 PBF LT6109IMS-1 TRPBF LTFNJ 10-Lead Plastic MSOP 40C to 85C LT6109AHMS-1 PBF LT6109AHMS-1 TRPBF LTFNJ 10-Lead Plastic MSOP 40C to 125C LT6109HMS-1 PBF LT6109HMS-1 TRPBF LTFNJ 10-Lead Plastic MSOP 40C to 125C LT6109AIMS-2 PBF LT6109AIMS-2 TRPBF LTFWY 10-Lead Plastic MSOP 40C to 85C LT6109IMS-2 PBF LT6109IMS-2 TRPBF LTFWY 10-Lead Plastic MSOP 40C to 85C LT6109AHMS-2 PBF LT6109AHMS-2 TRPBF LTFWY 10-Lead Plastic MSOP 40C to 125C LT6109HMS-2 PBF LT6109HMS-2 TRPBF LTFWY 10-Lead Plastic MSOP 40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: