LTC3454EDD#TRPBF Linear Technology, LTC3454EDD#TRPBF Datasheet
LTC3454EDD#TRPBF
Specifications of LTC3454EDD#TRPBF
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LTC3454EDD#TRPBF Summary of contents
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... A high constant operating frequency of 1MHz allows the use of small external components. The LTC3454 is offered in a low profi le (0.75mm) thermally enhanced 10-lead (3mm × 3mm) DFN package. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 10μF I ...
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... ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC3454EDD#PBF LTC3454EDD#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based fi nish parts. 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 Oscillator Frequency Soft-Start Time Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for ...
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LTC3454 TYPICAL PERFORMANCE CHARACTERISTICS LED Current Programming Ratio vs Temperature 4050 V = 3.6V IN 4000 3950 3900 3850 3800 3750 PROGRAMMED LED 3700 PROGRAMMED I = 500mA LED PROGRAMMED I = 150mA LED 3650 –55 –35 ...
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TYPICAL PERFORMANCE CHARACTERISTICS Oscillator Frequency vs Temperature 1100 OUT 1080 1060 1040 V = 4.2V IN 1020 1000 980 V = 3.6V IN 960 940 920 900 –55 –35 – TEMPERATURE (°C) Output Voltage Ripple ...
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LTC3454 BLOCK DIAGRAM 2.7V TO 5.5V UNDERVOLTAGE LOCKOUT OVERTEMP PROTECTION BANDGAP REFERENCE OUT 800mV I SET1 3 R ISET1 800mV I SET2 4 EN1 R ISET2 1 EN2 2 6 OPTIONAL ...
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OPERATION Buck-Boost DC/DC Converter The LTC3454 employs an LTC proprietary buck-boost DC/DC converter to generate the output voltage required to drive a high current LED. This architecture permits high- effi ciency, low noise operation at input voltages above, below or ...
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LTC3454 APPLICATIONS INFORMATION Boost Mode (V < OUT In boost mode, switch A is always on and switch B is always off. Referring to Figure 2, when the control voltage V above voltage V3, switches C and ...
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APPLICATIONS INFORMATION COMPONENT SELECTION Inductor Selection The high frequency operation of the LTC3454 allows the use of small surface mount inductors. The inductor cur- rent ripple is typically set to 20% to 40% of the maximum average inductor current. For ...
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LTC3454 TYPICAL APPLICATIONS diode such as an MBRM120T3 or equivalent. Do not use ordinary rectifi er diodes, since the slow recovery times will compromise effi ciency. In applications in which V is greater than 4V and V IN GND short-circuit ...
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... ALL DIMENSIONS ARE IN MILLIMETERS 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. If the LED fails as a short-circuit, the current limiting circuitry detects this condition and limits the peak input current to a safe level ...
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... I <1 μA, OUT(MAX 5.25V 28μA, I < 1μA, OUT(MAX 4V 20μ 20μA, OUT(MAX 34V 1.9mA, I < 1μA, OUT(MAX 40V 5mA, I < 16μA, OUT(MAX 40V 6.5mA, I < 1μA, OUT(MAX 3454fa LT 0309 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2005 5.5 ...