LT1961EMS8E Linear Technology, LT1961EMS8E Datasheet
LT1961EMS8E
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LT1961EMS8E Summary of contents
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... High frequency operation allows the reduction of input and output filtering components and permits the use of chip inductors. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. *Patent Pending UPS120 ...
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... LT1961IMS8E#PBF LT1961IMS8E#TRPBF LEAD BASED FINISH TAPE AND REEL LT1961EMS8E LT1961EMS8E#TR LT1961IMS8E LT1961IMS8E#TR Consult LTC Marketing for parts specified with wider operating temperature ranges. *Temperature grades are identified by a label on the shipping container. For more information on lead free part marking, go to: For more information on tape and reel specifications, go to: ...
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ELECTRICAL CHARACTERISTICS range, otherwise specifications are PARAMETER FB Input Current Voltage Gain Transconductance C V Pin Source Current C V Pin Sink Current C V Pin to Switch Current Transconductance ...
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LT1961 W U TYPICAL PERFORMANCE CHARACTERISTICS FB vs Temperature 1.22 1.21 1.20 1.19 1.18 –50 – 100 TEMPERATURE (°C) 1961 G01 SHDN Threshold vs Temperature 1.40 1.38 1.36 1.34 1.32 1.30 –50 – ...
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PIN FUNCTIONS FB: The feedback pin is used to set output voltage using an external voltage divider that generates 1.2V at the pin with the desired output voltage. If required, the current limit can be reduced during ...
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LT1961 W BLOCK DIAGRAM The LT1961 is a constant frequency, current-mode boost converter. This means that there is an internal clock and two feedback loops that control the duty cycle of the power switch. In addition to the normal error ...
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U U APPLICATIONS INFORMATION FB RESISTOR NETWORK The suggested resistance (R2) from FB to ground is 10k 1%. This reduces the contribution of FB input bias current to output voltage to less than 0.2%. The formula for the resistor (R1) ...
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LT1961 U U APPLICATIONS INFORMATION INDUCTOR CHOICE AND MAXIMUM OUTPUT CURRENT When choosing an inductor, there are 2 conditions that limit the minimum inductance; required output current, and avoidance of subharmonic oscillation. The maximum output current for the LT1961 in ...
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U U APPLICATIONS INFORMATION CATCH DIODE The suggested catch diode (D1 UPS120 or 1N5818 Schottky rated at 1A average forward current and 20V/30V reverse voltage. Typical forward voltage is 0.5V at 1A. The diode conducts current ...
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LT1961 U U APPLICATIONS INFORMATION SYNCHRONIZATION The SYNC pin, is used to synchronize the internal oscilla- tor to an external signal. The SYNC input must pass from a logic level low, through the maximum synchronization threshold with a duty cycle ...
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... UPS120 OPEN LT1961 OR HIGH SHDN SYNC GND C C2 6800pF C4 100pF R3 6.8k INPUT GND C3 LT1961EMS8E U1 GND PLACE FEEDTHROUGHS AROUND GROUND PIN FOR GOOD THERMAL CONDUCTIVITY OUTPUT 12V 0.5A* R1 90. 10μF 10k CERAMIC KEEP FB AND V COMPONENTS AWAY FROM HIGH FREQUENCY, HIGH INPUT COMPONENTS ...
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LT1961 U U APPLICATIONS INFORMATION THERMAL CALCULATIONS Power dissipation in the LT1961 chip comes from four sources: switch DC loss, switch AC loss, drive current, and input quiescent current. The following formulas show how to calculate each of these losses. ...
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U TYPICAL APPLICATIO 10V OFF + C1 4.7μF 20V Dual Output Flyback Converter R2 R1 10k 115k P6KE-20A 4.7μF 1N4148 S/S SW ...
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LT1961 U TYPICAL APPLICATIO S + SINGLE Li-Ion CELL 14 Single Li-Ion Cell UPS120 4.7μ S/S SW OFF LT1961 + FB C1 10μF GND 2.2nF C3 R3 100pF 10k ...
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... LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
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... Single Cell, High Current (2A), Micropower, Synchronous 3MHz Step-Up DC/DC Converter LTC3405/ 1.5MHz High Efficiency, I OUT LTC3405A Step-Down Regulator ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● High Voltage Laser Power Supply 0.01μ ...