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STEVAL-ISA083V1 Arkusz danych(PDF) 1 Page - STMicroelectronics |
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STEVAL-ISA083V1 Arkusz danych(HTML) 1 Page - STMicroelectronics |
1 / 4 page Data brief For further information contact your local STMicroelectronics sales office. September 2011 Doc ID 022278 Rev 1 1/4 4 STEVAL-ISA083V1 4 A peak 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40IPUR Features ■ Input voltage Vin : 4 V to 18 V ■ Output voltage Vout : 3.3 V ■ Maximum output current: 4 A ■ Switching frequency: 800 kHz ■ Short-circuit protected ■ RoHS compliant Description The STEVAL-ISA083V1, based on the ST1S40IPUR, is an internally compensated 800 kHz fixed-frequency PWM synchronous step- down converter demonstration board. The ST1S40 operates from 4.0 V to 18.0 V input, while it regulates an output voltage as low as 0.8 V and up to VIN (100% duty cycle). The ST1S40 integrates a 95 m Ω high-side switch and a 69 m Ω synchronous rectifier allowing very high efficiency with very low output voltage. The peak current mode control with internal compensation delivers a very compact solution with a minimum component count. The ST1S40 is protected through cycle-by-cycle current limiting in case of overload and is also protected by a current foldback function with frequency reduction in case of short-circuit. The device is available with an enable on/off function. STEVAL-ISA083V1 www.st.com |
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