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LT1933 数据表(PDF) 1 Page - Linear Technology |
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LT1933 数据表(HTML) 1 Page - Linear Technology |
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1 / 20 page  LT1933 1 1933fe TYPICAL APPLICATION FEATURES APPLICATIONS DESCRIPTION 600mA, 500kHz Step-Down Switching Regulator in SOT-23 and DFN Packages The LT®1933 is a current mode PWM step-down DC/DC converter with an internal 0.75A power switch, packaged in a tiny 6-lead SOT-23. The wide input range of 3.6V to 36V makes the LT1933 suitable for regulating power from a wide variety of sources, including unregulated wall transformers, 24V industrial supplies and automotive batteries. Its high operating frequency allows the use of tiny, low cost inductors and ceramic capacitors, resulting in low, predictable output ripple. Cycle-by-cycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start up. The low current (<2μA) shutdown provides output disconnect, enabling easy power manage- ment in battery-powered systems. L, LT, LTC, LTM, Linear Technology and the Linear logo 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. 3.3V Step-Down Converter n Wide Input Range: 3.6V to 36V n 5V at 600mA from 16V to 36V Input n 3.3V at 600mA from 12V to 36V Input n 5V at 500mA from 6.3V to 36V Input n 3.3V at 500mA from 4.5V to 36V Input n Fixed Frequency 500kHz Operation n Uses Tiny Capacitors and Inductors n Soft-Start n Internally Compensated n Low Shutdown Current: <2μA n Output Adjustable Down to 1.25V n Low Profile (1mm) SOT-23 (ThinSOT™) and (2mm × 3mm × 0.75mm) 6-Pin DFN Packages n Automotive Battery Regulation n Industrial Control Supplies n Wall Transformer Regulation n Distributed Supply Regulation n Battery-Powered Equipment Efficiency VIN 4.5V TO 36V OFF ON 0.1μF 22μH 1N4148 MBRM140 10k 16.5k 22μF 1933 TA01a 2.2μF VOUT 3.3V/500mA VIN BOOST GND FB SHDN SW LT1933 LOAD CURRENT (mA) 0 90 95 300 400 1933 TA01b 85 80 100 200 600 500 75 70 65 VIN = 12V VOUT = 5V VOUT = 3.3V |
类似零件编号 - LT1933 |
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类似说明 - LT1933 |
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