lt3493edcb-3 Linear Technology Corporation, lt3493edcb-3 Datasheet
lt3493edcb-3
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lt3493edcb-3 Summary of contents
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... The low current (<2µA) shutdown mode provides output disconnect, enabling easy power management in battery-powered systems. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. ...
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... BOOST 6-LEAD (2mm × 3mm) PLASTIC DFN EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB ORDER PART NUMBER LT3493EDCB-3 Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: Consult LTC Marketing for parts specified with wider operating temperature ranges. ...
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ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are 12V 17V, unless otherwise noted. (Note 2) IN BOOST PARAMETER Switch Current Limit Switch V CESAT Switch ...
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LT3493 TYPICAL PERFOR A CE CHARACTERISTICS Maximum Load Current 5V 8.2µH OUT 1.60 1.50 TYPICAL 1.40 1.30 1.20 MINIMUM 1.10 1.00 0. (V) IN 3493-3 G04 Maximum ...
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W U TYPICAL PERFOR A CE CHARACTERISTICS SHDN Pin Current (V) SHDN 3493-3 G14 Operating Waveforms V ...
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LT3493 CTIO S FB (Pin 1): The LT3493-3 regulates its feedback pin to 780mV. Connect the feedback resistor divider tap to this pin. Set the output voltage according R1/R2). A good ...
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U OPERATIO (Refer to Block Diagram) The LT3493 constant frequency, current mode step- down regulator. A 750kHz oscillator enables an RS flip- flop, turning on the internal 1.75A power switch Q1. An amplifier and comparator monitor the current ...
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LT3493 APPLICATIO S I FOR ATIO FB Resistor Network The output voltage is programmed with a resistor divider between the output and the FB pin. Choose the 1% resistors according to: ⎛ ⎞ OUT ⎝ ⎜ ...
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U U APPLICATIO S I FOR ATIO Minimum On Time The part will still regulate the output at input voltages that exceed V (up to 40V), however, the output voltage IN(PS) ripple increases as the input voltage is increased. Figure ...
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LT3493 APPLICATIO S I FOR ATIO Table 1. Inductor Vendors Vendor URL Sumida www.sumida.com Toko www.toko.com Würth Elektronik www.we-online.com larger value provides a higher maximum load current and reduces output voltage ripple at the expense of slower transient ...
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U U APPLICATIO S I FOR ATIO Table 2. Capacitor Vendors Vendor Phone Panasonic (714) 373-7366 Kemet (864) 963-6300 Sanyo (408) 749-9714 Murata (404) 436-1300 AVX Taiyo Yuden (864) 963-6300 is in µF. Use X5R or X7R types and keep ...
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LT3493 APPLICATIO S I FOR ATIO 32.4k FB 10k 32.4k 3.3nF FB 10k 32. 10k Figure 4. Transient Load Response of the LT3493-3 with Different Output Capacitors as the Load Current is Stepped from 250mA to ...
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U U APPLICATIO S I FOR ATIO is already in regulation, then the boost capacitor may not be fully charged. Because the boost capacitor is charged with the energy stored in the inductor, the circuit will rely on some minimum ...
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LT3493 APPLICATIO S I FOR ATIO choosing a large RC time constant, the peak start up current can be reduced to the current that is required to regulate the output, with no overshoot. Choose the value of the ...
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U U APPLICATIO S I FOR ATIO CLOSING SWITCH SIMULATES HOT PLUG + LOW STRAY IMPEDANCE INDUCTANCE ENERGIZED DUE TO 6 FEET 24V SUPPLY (2 METERS) OF TWISTED PAIR + 10µF 35V AI.EI. + 0.1µF Figure 8. A Well Chosen ...
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LT3493 APPLICATIO S I FOR ATIO response. Large electrolytic capacitors may have an ESR large enough to create an additional zero, and the phase lead may not be necessary. If the output capacitor is different than the recommended ...
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U U APPLICATIO S I FOR ATIO loss. The resulting temperature rise at full load is nearly independent of input voltage. Thermal resistance de- pends on the layout of the circuit board, but 64°C/W is typical for the (2mm × ...
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LT3493-3 U TYPICAL APPLICATIO S V 6.8V TO 28V ON OFF V IN 6.8V TO 36V ON OFF V IN 6.8V TO 36V ON OFF 18 2.5V Step-Down Converter BAT54 IN V BOOST IN LT3493-3 0.47µF 6.8µH SW SHDN MBRM140 ...
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... NOTE 6) 0.200 REF 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. U DCB Package 6-Lead Plastic DFN (2mm × ...
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... High Efficiency Step-Down OUT DC/DC Converter LT3506/LT3506A Dual 25V, 1. 575kHz to 1.1MHz, High Efficiency OUT Step-Down DC/DC Converter Burst Mode is a registered trademark of Linear Technology Corporation. Linear Technology Corporation 20 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● 12V Step-Down Converter ...