ST2S06 Dual synchronous rectification with reset or inhibit, 0.5 A, 1.5 MHz adjustable step-down switching regulator Datasheet - production data Description The ST2S06A33 and ST2S06B are dual step- down DC-DC converters optimized for powering low-voltage digital cores in ODD applications and, generally, to replace high current linear solutions when the power dissipation may cause high heating of the application environment. It provides up to 0.5 A over an input voltage range of 2.5 V to 5.5 V. QFN12L (4 x 4 mm) A high switching frequency of 1.5 MHz allows the use of tiny surface-mount components as well as a resistor divider to set the output voltage value. Only an inductor and two capacitors are required. A low output ripple is guaranteed by the current Features mode PWM topology and the utilization of low ESR SMD ceramic capacitors. The devices are Step-down current mode PWM (1.5 MHz) DC- thermally protected and current-limited to prevent DC converter damage due to accidental short-circuit. The Fixed or adjustable output voltage from 0.8 V ST2S06A33 and ST2S06B are available in the QFN12L (4x4 mm) package. 2% DC output voltage tolerance Synchronous rectification Reset function for A version Inhibit function for B version Internal soft start for startup current limitation and power ON delay of 50-100 s Typical efficiency: > 90% 0.5 A output current capability Non-switching quiescent current: max 1.2 mA over temperature range R 150 m (typ.) DS(ON) Uses tiny capacitors and inductors Available in QFN12L (4x4 mm) Table 1. Device summary Order codes Package Packaging ST2S06A33PQR QFN12L (4 x 4 mm) Tape and reel ST2S06BPQR May 2013 DocID13866 Rev 6 1/18 This is information on a product in full production. www.st.comContents ST2S06 Contents 1 Schematic diagram 3 2 Pin configuration 4 3 Maximum ratings 5 4 Electrical characteristics . 6 5 Typical performance characteristics 8 6 Typical application . 11 7 Application information . 12 8 Package mechanical data 13 9 Revision history . 17 2/18 DocID13866 Rev 6