RT8100應用電路及參數

The RT8100 is an advanced DC/DC synchronous buck PWM controller with several innovative functions for specific customer's ASIC only. The part features RichTek's innovative design and topology say "analogous current mode" for current sensing and full functions for various applications including adjustable soft start, free-run and adjustable operation frequency and enable; the part is with design of 12V+12V boot strapped driver which is capable to drive up to 20Amp output current; moreover the part is with implementation of accuracy DCR current sensing topology. There are several specific features implemented and reserved for the specific customer's special applications including dual VCORE control mode including tracking and stand-alone mode, and output current indication. The part is proposed with a small footprint of VQFN-16L 3x3 package.

Features
? Analogous Current Mode Design
? 2.5V to 12V Switching Source Power
? 0.8V to 3.3V Output Voltage Regulation
? Adjustable VIN Feed-Forward Ramp Slope
? Adjustable Operation Frequency
? Precise Core Voltage Regulation
? Precise DCR Current Sensing with High Quality Capacitor, X7R
? ± 1.5% System Accuracy
? Input Voltage : 12V and 5V Bias
? Enable Function
? RoHS Compliant and 100% Lead (Pb)-Free
? Over Current Protection
? External Soft Start Setting
? Operation Frequency up to 1.0MHz
? Dual Mode Voltage Control
?? ? Tracking Mode
?? ? Stand-Alone Mode
? Output Current Indication
? 16-Lead VQFN Package

Application
? MB memory and chipset core power
? Middle-high graphic card GPU and memory core power
? General-purpose fields including server, NB, bare-bone and mini-system

Typical Applications Circuit

RT8110規格書