DC2749A Analog Devices

LTC7003 Fast 60V Protected High Side NMOS Static Switch Driver FEATURES DESCRIPTION n Wide Operating V : 3.5V to 60V The LTC 7003 is a fast high side N-channel MOSFET IN n 1 Pull-Down, 2.2 Pull-Up for Fast Turn-On and gate driver that operates from input voltages up to 60V. Turn-Off Times with 35ns Propagation Delays It contains an internal charge pump that fully enhances an n Internal Charge Pump for 100% Duty Cycle external N-channel MOSFET switch, allowing it to remain n Short-Circuit Protected on indefinitely. n Adjustable Current Trip Threshold Its powerful driver can easily drive large gate capacitances n Current Monitor Output with very short transition times, making it well suited for n Automatic Restart Timer both high frequency switching applications or static switch n Open-Drain Fault Flag applications that require a fast turn-on and/or turn-off time. n Adjustable Turn-On Slew Rate n When an internal comparator senses that the switch Gate Driver Supply from 3.5V to 15V n current has exceeded a preset level, a fault flag is asserted Adjustable V Undervoltage and Overvoltage IN and the switch is turned off after a period of time set by Lockouts n an external timing capacitor. After a cooldown period, the Adjustable Driver Supply V Undervoltage Lockout CC n LTC7003 automatically retries. Low Shutdown Current: 1A n CMOS Compatible Input The LTC7003 is available in the thermally-enhanced n Thermally Enhanced, High Voltage Capable 16-Lead 16-lead MSOP package. MSOP Package All registered trademarks and trademarks are the property of their respective owners. APPLICATIONS n Static Switch Driver n Load and Supply Switch Driver n Electronic Valve Driver n High Frequency High Side Gate Driver TYPICAL APPLICATION High Side Switch with 100% Duty Cycle and Overcurrent Protection Turn-On Transient Waveform V IN 3.5V TO 60V + SNS V V INP IN 2V/DIV RUN LTC7003 0.007 100 OFF ON INP SNS V TGUP CC TGDN V LOAD 100k 1F 20V/DIV BST LOAD FAULT 0.1F 3.5V TO 60V TIMER TS V = 60V IN 3A CONTINOUS MAX V 1nF CCUV 7003 TA01b OVLO 20ns/DIV GND PINS NOT USED IN THIS CIRCUIT: 7003 TA01a IMON ISET Rev. B 1 Document Feedback For more information www.analog.comLTC7003 TABLE OF CONTENTS Features ..................................................... 1 Applications Information ................................ 12 Applications ................................................ 1 Input Stage ............................................................. 12 Typical Application ........................................ 1 Output Stage ........................................................... 12 + Description.................................................. 1 SNS and SNS Pins ............................................... 12 Absolute Maximum Ratings .............................. 3 I Pin ................................................................... 13 SET Order Information .......................................... 3 Fault Timer and Fault Flag ....................................... 13 Pin Configuration .......................................... 3 Cooldown Period and Restart ................................. 14 Electrical Characteristics ................................. 4 Fast Turn-Off Mode ................................................. 15 Typical Performance Characteristics ................... 6 High Side Current Monitor Output .......................... 15 Pin Functions ............................................... 8 RUN Pin and External Input Overvoltage/ Block Diagram .............................................. 9 Undervoltage Lockout ............................................. 15 Timing Diagram ........................................... 10 Bootstrapped Supply (BST-TS) ............................... 16 Operation................................................... 10 V Undervoltage Comparator ................................ 17 CC Overcurrent Protection ........................................... 10 MOSFET Selection .................................................. 18 Current Monitor ...................................................... 10 Limiting Inrush Current During Turn-On ................. 18 V Power ............................................................... 10 Optional Schottky Diode Usage on TS .................... 19 CC Internal Charge Pump ............................................. 11 Reverse Current Protection ..................................... 19 Start-Up and Shutdown .......................................... 11 Design Example ...................................................... 19 Protection Circuitry ................................................. 11 PC Board Layout Considerations ............................20 Typical Applications ...................................... 21 Package Description ..................................... 24 Revision History .......................................... 25 Typical Application ....................................... 26 Related Parts .............................................. 26 Rev. B 2 For more information www.analog.com