USR1021

UNISONIC TECHNOLOGIES CO., LTD USR1021 Preliminary LINEAR INTEGRATED CIRCUIT 3A SYNCHRONOUS BUCK REGULATOR  DESCRIPTION The UTC USR1021 is a high efficiency, 3A synchronous buck regulator. T he UT C USR1021 works fro m a 6V to 1 8V in put voltage range, and provides up to 3A of continuous output current with an output voltage adjustable down to 0.8V. The UTC USR1021 comes in an SOP-8 packages and is rated over a -40°C~+85°C ambient temperature range. SOP-8  FEATURES * 6V~18V operating input voltage range * High efficiency * Internal soft start * 1.5% initial output accuracy * Output voltage adjustable to 0.8V * 3A continuous output current * Cycle-by-cycle current limit * 500kHz PWM operation * Thermal shutdown * Short-circuit protection  ORDERING INFORMATION Package Packing SOP-8 SOP-8 Tape Reel Tube Ordering Number Lead Free Halogen Free USR1021L-S08-R USR10 21G-S08-R USR1021L-S08-T USR1021G-S08-T Note: xx : Output Voltage, refer to Marking Information. www.unisonic.com.tw Copyright © 2013 Unisonic Technologies Co., Ltd 1 of 4 QW-R103-073.a http://www.Datasheet4U.com USR1021  PIN CONFIGURATION Preliminary LINEAR INTEGRATED CIRCUIT  PIN DESCRIPTION DESCRIPTION Power ground Supply voltage input Reference connectio for controller section Feedback voltage Compensation pin Enable pin Switch pin PIN NO. PIN NAME 1 PGND 2V IN 3 AGND 4F B 5 COMP 6 EN 7, 8 LX  BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 4 QW-R103-073.a USR1021  ...