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ST8R00 Fiches technique(PDF) 1 Page - STMicroelectronics |
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ST8R00 Fiches technique(HTML) 1 Page - STMicroelectronics |
1 / 19 page May 2007 Rev. 1 1/19 19 ST8R00 Micropower 1A synchronous step-up DC-DC converter Features ■ Very low supply current: 500µA (typ) ■ Output voltage adjustable from 6V to 12V ■ Output voltage accuracy: ±2% ■ Output current up to 1A ■ Low ripple voltage: 5mV (typ) ■ Synchronous rectification ■ High 90% efficiency: VO = 9V (typ) ■ Few external components ■ Very small DFN8 (4x4mm) package Description The ST8R00 family of low quiescent current, synchronous PWM step-up DC-DC converters offer high efficiency even in light load conditions. The ST8R00 accepts a positive input voltage from 4 to 6V and provides an output voltage in the 6 to 12V range. The ST8R00 is developed in two versions: Burst mode and Continuous mode. The Burst mode version functions in discontinuous mode, allowing the device to maintain the regulated voltage in no load conditions by turning off the internal switches. The Continuous mode version, ST8R00W, guarantees the lowest switching ripple when the device is used at light load conditions. The high switching frequency and internally limited peak inductor current permit the use of small, low-cost inductors. Only three external components are required: an inductor and two ceramic capacitors. The ST8R00 is suitable for use in equipment where low noise, low ripple and low supply current are required. The ST8R00 is available in a very small DFN8 4x4mm package. DFN8 4x4mm www.st.com Order codes Part number Package Output voltages ST8R00 (1) 1. Burst mode at light load ST8R00PUR ADJ ST8R00W (2) 2. Full PWM mode ST8R00WPUR ADJ |
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