ST8R00WPUR STMicroelectronics

ST8R00 Micropower 1 A synchronous step-up DC-DC converter Features Output voltage adjustable from 6 V to 12 V Output voltage accuracy: 2% Output current up to 1 A Low ripple voltage: 5 mV (typ.) Synchronous rectification High 90% efficiency: V = 9 V (typ.) O DFN8 4 x 4 mm Few external components Thermal shutdown protection Very small DFN8 (4 x 4 mm) package Description The ST8R00 is a synchronous PWM step-up DC- DC converter. The device is able to provide an output voltage in the range of 6 to 12 V with an input voltage from 4 to 6 V. The high switching frequency (1.7 MHz) permits the use of tiny surface-mount components. In addition to the resistor divider to set the output voltage value, only an inductor and two capacitors are required. Moreover, a low output ripple is guaranteed by the current mode PWM topology and by the use of low ESR SMD ceramic capacitors. The device is available in a very small DFN8 (4 x 4 mm) package. Table 1. Device summary Part number Order code Output voltage ST8R00 ST8R00WPUR ADJ February 2012 Doc ID 13449 Rev 2 1/18 www.st.com 18Contents ST8R00 Contents 1 Block diagram 3 2 Pin configuration 4 3 Typical application circuit 5 4 Maximum ratings 6 5 Electrical characteristics . 7 6 Typical characteristics . 8 7 Package mechanical data 13 8 Revision history . 17 2/18 Doc ID 13449 Rev 2