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ST1S40IPUR 数据表(PDF) 1 Page - STMicroelectronics |
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ST1S40IPUR 数据表(HTML) 1 Page - STMicroelectronics |
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1 / 30 page  March 2012 Doc ID 17928 Rev 4 1/30 30 ST1S40 3 A DC step-down switching regulator Features ■ 3 A DC output current ■ 4.0 V to 18 V input voltage ■ Output voltage adjustable from 0.8 V ■ 850 kHz switching frequency ■ Internal soft-start ■ Integrated 95 m Ω and 69 mΩ Power MOSFETs ■ All ceramic capacitor ■ Enable ■ Cycle-by-cycle current limiting ■ Current fold back short-circuit protection ■ VFQFPN4x4-8L, HSOP-8, and SO-8 and packages Applications ■ μP/ASIC/DSP/FPGA core and I/O supplies ■ Point of load for: STB, TVs, DVD ■ Optical storage, hard disk drive, printers, audio/graphic cards Figure 1. Application circuit Description The ST1S40 is an internally compensated 850 kHz fixed-frequency PWM synchronous step- down regulator. ST1S40 operates from 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to VIN. The ST1S40 integrates a 95 m Ω high side switch and 69 m Ω synchronous rectifier allowing very high efficiency with very low output voltages. The peak current mode control with internal compensation delivers a very compact solution with a minimum component count. The ST1S40 is available in VFQFPN 4 mm x 4 mm 8 lead package, HSOP-8 and standard SO-8. VFQFPN 4x4 SO8 www.st.com |
类似零件编号 - ST1S40IPUR |
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类似说明 - ST1S40IPUR |
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