| Specifications | LT3500 - Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller Data Sheet Linear Technology Corporation |
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| Specifications | LT3500 - Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller Data Sheet Linear Technology Corporation |
| Business section |
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| Specifications | LT3500 - Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller Data Sheet Linear Technology Corporation |
| Suggested Link Details/Purchase |
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| Content | LT3500 1 3500fb FEATURES APPLICATIONS DESCRIPTION Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller The LT®3500 is a current mode PWM step-down DC/DC converter with an internal 2.3A switch. The wide input range of 3V to 40V makes the LT3500 suitable for regulating power from a wide variety of sources, including automo- tive batteries, 24V industrial supplies and unregulated wall adapters. Resistor-programmable 250kHz to 2.2MHz frequency range and synchronization capability enable optimization between effi ciency and external component size. Cycle- by-cycle current limit, frequency foldback and thermal shutdown provide protection against a shorted output. The soft-start feature controls the ramp rate of the output voltage, eliminating input current surge during start-up, and also provides output tracking. The LT3500 contains an internal NPN transistor with feed- back control which can be confi gured as a linear regulator or as a linear regulator controller. The LT3500’s low current shutdown mode (<12µA) enables easy power management in battery-powered systems. n Wide Input Range: 3V to 36V Operating, 40V Maximum n Short-Circuit Protected Over Full Input Range n 2A Output Current Capability n Adjustable/Synchronizable Fixed Frequency Operation from 250kHz to 2.2MHz n Soft-Start/Tracking Capability n Output Adjustable Down to 0.8V n Adjustable Linear Regulator/Driver with 13mA Output Capability n Power Good Comparator with Complimentary Outputs n Low Shutdown Current: 12µA n Thermally Enhanced 3mm × 3mm DFN or 16-Pin MSOP Package n Automotive Battery Regulation n Industrial Control n Wall Transformer Regulation n Distributed Power Regulation Dual Step-Down ConvertersOutput Voltage RippleSwitching Converter Effi ciency L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION 6.8µH 0.47µF 22µF 22µF 42.2k 8.06k 2.2µF 0.47µF VIN6V TO 36V 40.2k 53.6k 330pF 3500 TA01a VOUT15V 1A VOUT23.3V 1A B240A BSTVIN SW FB SHDN SS LT3500 RT/SYNC VC LDRV LFB PG PG 8.06k 24.9k 1k LOAD CURRENT (A) 0 EFFICIENCY (%) 90 85 80 75 70 65 60 55 50 1.6 3500 TA01b 0.40.81.22.01.40.20.61.01.8 VIN = 12V IOUT2 = 0A FREQUENCY = 800kHz 500ns/DIV3500 TA01c VOUT1 = 5V AT 1A AC COUPLED 2mV/DIV VOUT2 = 3.3V AT 1A AC COUPLED 2mV/DIV |
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| Following Datasheets | 3508fb (24 pages) 350_appnote (1 pages) 350_appnote2 (1 pages) 352001 (1 pages) 3526lfb (16 pages) 3526llb2f (16 pages) 355_manual (23 pages) 358_REV3 (9 pages) 3598fa-1 (24 pages) 3599fa-1 (24 pages) |
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