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ST1S40 Datasheet(PDF) 1 Page - STMicroelectronics |
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ST1S40 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 29 page  This is information on a product in full production. October 2013 DocID17928 Rev 5 1/29 ST1S40 3 A DC step-down switching regulator Datasheet - production data 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 and 69 m Power MOSFETs All ceramic capacitor Enable Cycle-by-cycle current limiting Current fold back short-circuit protection Available in HSOP-8, VFQFPN4x4-8L, and SO8 packages Applications P/ASIC/DSP/FPGA core and I/O supplies Point of load for: STB, TVs, DVD Optical storage, hard disk drive, printers, audio/graphic cards Description The ST1S40 device is an internally compensated 850 kHz fixed-frequency PWM synchronous step- down regulator. The 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 high side switch and 69 m 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 HSOP-8, VFQFPN 4 mm x 4 mm - 8 lead, and standard SO8 package. Figure 1. Application circuit VFQFPN 4 x 4 SO8 HSOP-8 www.st.com |
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