LT1945EMS Linear Technology, LT1945EMS Datasheet
LT1945EMS
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LT1945EMS Summary of contents
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... The LT1945’s low off-time of 400ns permits the use of tiny, low profi le inductors and capacitors to minimize footprint and cost in space-conscious portable applications. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. D1 –20V ...
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... LT1945IMS#PBF LT1945IMS#TRPBF LEAD BASED FINISH TAPE AND REEL LT1945EMS LT1945EMS#TR LT1945IMS LT1945IMS#TR Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. For more information on lead free part marking, go to: For more information on tape and reel specifi ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T PARAMETER CONDITIONS SHDN Pin Current V SHDN V SHDN SHDN Input Voltage High SHDN Input Voltage Low Switch Leakage Current Switch Off, V Note 1: Stresses beyond those listed under ...
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LT1945 PIN FUNCTIONS NFB1 (Pin 1): Feedback Pin for Switcher 1. Set the output voltage by selecting values for R1 and R2. SHDN1 (Pin 2): Shutdown Pin for Switcher 1. Tie this pin to 0.9V or higher to enable device. ...
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OPERATION current in inductors L1 and L2 begins ramping up. Once the switch current reaches 350mA, comparator A2 resets the one-shot, which turns off Q3 for 400ns. L2 continues to deliver current to the output while Q3 is off. Q3 ...
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LT1945 APPLICATIONS INFORMATION Inductor Selection—Inverting Regulator The formula below calculates the appropriate inductor value to be used for an inverting regulator using the LT1945 (or at least provides a good starting point). This value provides a good tradeoff in inductor ...
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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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
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... I = <1μA, OUT 6V 38μ <1μA, MS Package OUT 6V 38μ <1μA, MS Package OUT 6V 38μ <1μA, MS Package OUT 6V 38μ <1μA, MS Package OUT 1208 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2001 1945fa ...