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ST750ACDTR Scheda tecnica(PDF) 1 Page - STMicroelectronics |
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ST750ACDTR Scheda tecnica(HTML) 1 Page - STMicroelectronics |
1 / 14 page May 2007 Rev. 3 1/14 14 ST750A Adjustable step-down, current-mode PWM DC-DC converters Features ■ Up to 450mA load currents ■ 200kHz high-frequency current-mode PWM ■ 85% to 96% efficiencies ■ 33mH or 100mH pre-selected inductor value, no component design required ■ 0.8mA quiescent current ■ 0.3µA shutdown supply current ■ Adjustable output voltage ■ Overcurrent, soft-start and undervoltage lockout protection ■ Cycle-by-cycle current limiting ■ Package available: SO-8 Description The ST750A is an adjustable output CMOS, step- down switching regulator. The ST750A accepts inputs between 4V and 11V and delivers 450mA. Typical efficiencies are 85% to 96%. Quiescent supply current is 0.8mA and only 0.3mA in shutdown mode. The output does not exhibit frequency over this specified range. Pulse- width modulation (PWM) current-mode control provides precise output regulation and excellent transient responses. Output voltage accuracy is guaranteed to be ±4.5% plus feedback resistor tolerance over line, load, and temperature variations. Fixed-frequency switching and absence of sub- harmonic ripple allows easy filtering of output ripple and noise, as well as the use of small external components. This regulators require only a single inductor value to work in most applications, so no inductor design is necessary. Typical applications are: Cellular phones & radios, portable Instruments, Portable Communications Equipment and Computer Peripherals. SO-8 www.st.com Order code Part number Packaging ST750AC ST750ACDTR |
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