STODD03 Monolithic 2-channel power management for high-definition ODD with integrated power switch Features 1.2 MHz DC-DC current mode PWM converter Input voltage from 4 V up to 6 V Step-down 3.3 V fixed output voltage, up to 700 mA load Step-up output current up to 500 mA 2% step-down output voltage tolerance QFN16L (4 x 4 mm) 3% step-up output voltage tolerance Synchronous rectification Step-down power-save mode at light load Typical efficiency: 90% shutdown makes the step-up section particularly Internal soft-start suitable for optical storage power management Enable functions applications. Moreover, the STODD03 has a 1 A True cutoff function for step-up converter integrated power switch for motor control power supply. The high switching frequency allows the Integrated motor control power switch use of tiny SMD components. Low output ripple Uses tiny capacitors and inductors voltage is achieved thanks to the current mode Available in QFN16 (4 x 4 mm) PWM topology. The device includes soft-start control, thermal shutdown, and peak current limit to prevent damage due to accidental overload. Description The STODD03 is packaged in a QFN16 (4 x 4 The STODD03 is a 2-channel power mm). management device intended for Blu-Ray applications based on high density optical storage devices. It integrates one step-down converter able to provide 3.3 V fixed output voltage up to 700 mA load, and one step-up converter to provide the power supply needed for the blue laser in applications where only 5 V input voltage is available. The step-up output voltage is adjustable in the range from 6.5 V to 14 V, with current capability up to 500 mA. Both step-down and step-up channels integrate low R N- DS ON channel and P-channel MOSFETs, allowing high DC-DC efficiencies. The enable function with true Table 1. Device summary Part number Order code Marking Package STODD03 STODD03PQR ODD03 QFN16 (4 x 4 mm) August 2011 Doc ID 018980 Rev 1 1/16 www.st.com 16Contents STODD03 Contents 1 Block diagram 3 2 Absolute maximum ratings . 4 3 Pin configuration 5 4 Typical application 7 5 Electrical characteristics . 8 6 Package mechanical data 11 7 Revision history . 15 2/16 Doc ID 018980 Rev 1