ST1S06PU33R STMicroelectronics

ST1S06xx Synchronous rectification with inhibit, 1.5 A, 1.5 MHz fixed or adjustable, step-down switching regulator Features Step-down current mode PWM (1.5 MHz) DC- DC converter 2% DC output voltage tolerance Synchronous rectification Inhibit function Internal soft start DFN6D (3x3 mm) Typical efficiency: > 90 % 1.5 A output current capability Not switching quiescent current: max 1.5 mA over temperature range Besides, a low output ripple is guaranteed by the R typ.150 m DS(ON) current mode PWM topology and by the use of low Uses tiny capacitors and inductors ESR SMD ceramic capacitors. The device is Operative junction temp. - 30 C to 125 C thermal protected and current limited to prevent damages due to accidental short circuit. The Available in DFN6D (3x3 mm) exposed pad ST1S06xx is available in DFN6D (3x3 mm) package. Description The ST1S06xx is a step down DC-DC converter optimized for powering low-voltage digital core in HDD applications and, generally, to replace the high current linear solution when the power dissipation may cause an high heating of the application environment. It provides up to 1.5 A over an input voltage range of 2.7 V to 6 V. An high switching frequency (1.5 MHz) allows the use of tiny surface-mount components: as well as the resistor divider to set the output voltage value, only an inductor and two capacitors are required. Table 1. Device summary Part numbers Marking Order codes Package ST1S06 ST1S06 ST1S06PUR DFN6D (3 x 3 mm) ST1S06A ST1S06A ST1S06APUR DFN6D (3 x 3 mm) ST1S06XX12 1S0612 ST1S06PU12R DFN6D (3 x 3 mm) ST1S06XX33 1S0633 ST1S06PU33R DFN6D (3 x 3 mm) May 2009 Doc ID 12236 Rev 9 1/20 www.st.com 20 Contents ST1S06xx Contents 1 Diagram . 3 2 Pin configuration . 4 3 Maximum ratings 5 4 Electrical characteristics . 6 5 Typical performance characteristics 9 6 Typical application . 13 7 Application notes 14 8 Package mechanical data 15 9 Revision history . 19 2/20 Doc ID 12236 Rev 9