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LT8335 Datasheet(PDF) 1 Page - Analog Devices |
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LT8335 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 34 page  LT8357 1 Rev. 0 For more information www.analog.com Document Feedback TYPICAL APPLICATION FEATURES DESCRIPTION 60V 2MHz Low-IQ Boost, SEPIC and Flyback Controller The LT®8357 is a wide input range, current mode, DC/DC controller which can be configured as a boost, SEPIC or flyback converter. The LT8357 drives a low side N-channel power MOSFET with 5V split gate drive. The current mode architecture allows adjustable and synchronizable 100kHz to 2MHz fixed frequency operation, or internal 19% trian- gle spread spectrum operation for low EMI. At light load, either pulse-skipping mode or low-ripple Burst Mode operation can be selected. Additional features include output power good and output short circuit protection in SEPIC and flyback configurations. With a wide 3V to 60V input voltage range and 8µA low quiescent current, the LT8357 provides a simple, com- pact and efficient solution for automotive, industrial, and battery-powered systems. 2MHz, 8V to 16V Input, 24V/2A Output Boost Converter Efficiency vs Load Current APPLICATIONS n Wide Input Voltage Range: 3V to 60V n Low IQ Burst Mode® Operation: 8µA n Up to 95% Efficiency at 2MHz n ±1.5% Internal 1V Voltage Reference n 5V Split Gate Drive for Efficiency and EMI Optimization n 100kHz to 2MHz Fixed Switching Frequency with External Clock Synchronization n Spread Spectrum Frequency Modulation for Low EMI n Accurate Enable Threshold with Hysteresis n Programmable Output Soft-Start and Tracking n Thermally-Enhanced 12-Lead MSOP Package n Automotive and Industrial Systems n Battery-Powered Systems n Portable Electronic Equipment All registered trademarks and trademarks are the property of their respective owners. 1M 196k 2.2µH 100k 22k D1 M1 5m 1MEG 43.2k 10nF 47nF 2MHz 15k 2.2µF 22µF x2 10µF EN/UVLO VC FB SYNC/MODE VIN LT8357 GND PGOOD SS RT GATEP GATEN INTVCC VIN 8V TO 16V 25V VOUT 24V 2A 35V SENSE INTVCC 8357 TA01a fSW = 2MHz BURST VIN = 16V VIN = 12V VIN = 8V LOAD CURRENT (A) 0.0001 0.001 0.01 0.1 1 10 50 60 70 80 90 100 8357 TA01b |
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