RY9120

RY9120 17V 2A 500KHz ECOT Sync Step-Down Regulator Features • • • • • • • • • Wide 4.5V to 17V Operating Input Range 2A Continuous Output Current 500KHz Switching Frequency ECOT Mode Control with Fast Transient Response Built-in Over Current Limit Built-in Over Voltage Protection PFM Mode for High Efficiency in Light Load Internal Soft-Start • • • • • • • 110mΩ/70mΩ Low RDS(ON) Internal Power MOSFETs Output Adjustable from 0.6V No Schottky Diode Required Short Protection with Hiccup-Mode Integrated internal compensation Thermal Shutdown Available in SOT23-6 Package -40°C to +85°C Temperature Range • • • • Digital Video Recorder (DVR) Portable Media Player (PMP) Cable Modem / XDSL General Purposes Applications • • • • Digital Set-top Box (STB) Tablet Personal Computer (Pad) Flat-Panel Television and Monitor Wi-Fi Router / AP General Description The RY9120 is a high frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to provide a 2A continuous output current over a wide input supply range, with excellent load and line regulation. ECOT control operation provides very fast transient response and easy loop design as well as very tight output regulation. The RY9120 requires a minimal number of readily available, external components and is available in a space saving SOT23-6 package. Typical Application Circuit C1 BS VIN IN L1 VOUT SW R1 CIN ON/ OFF EN CFF COUT FB GND R2 Basic Application Circuit Email: support@rychip.com ©RYCHIP Semiconductor Inc. http://www.rychip.com Page 1 / 13 RY9120 17V 2A 500KHz ECOT Sync Step-Down Regulator Pin Description Pin Configuration TOP VIEW BS 1 6 SW GND 2 5 IN FB 3 4 EN SOT23-6 Top Marking: CCYLL (device code: CC, Y=year code, LL= lot number code) Pin Description Pin Name Function 1 BS 2 GND 3 FB Adjustable Version Feedback input. Connect FB to the center point of the external resistor divider 4 EN Drive this pin to a logic-high to enable the IC. Drive to a logic-low to disable the IC and enter micro-power shutdown mode. 5 IN Power Supply Pin 6 SW Switching Pin Bootstrap. A capacitor connected between SW and BST pins is required to form a floating supply across the high-side switch driver. GROUND Pin Order Information (1) Marking Part No. Model Description CCYLL 70301120 RY9120 RY9120 ECOT Buck, 4.5-17V, 500KHz, VFB 0.6V, SOT23-6 2A, Package T/R Qty SOT23-6 3000PCS Note (1): All RYCHIP parts are Pb-Free and adhere to the RoHS directive. Email: support@rychip.com ©RYCHIP Semiconductor Inc. http://www.rychip.com Page 2 / 13 RY9120 17V 2A 500KHz ECOT Sync Step-Down Regulator Specifications Absolute Maximum Ratings (1) (2) Item Min Max Unit VIN voltage -0.3 18 V EN voltage -0.3 18 V SW voltage -3 19 V SW voltage (