RT8097B 2A, 1MHz, 5.5V CMCOT Synchronous Step-Down Converter General Description Features Efficiency Up to 95% The RT8097B is a high efficiency synchronous step- R 110m HS / 80m LS DSON down DC/DC converter. Its input voltage range is from V Range 2.7V to 5.5V IN 2.7V to 5.5V and provides an adjustable regulated V 0.6V with 2% Accuracy at 25C REF output voltage from 0.6V to 3.4V while delivering up to CMCOT Control Loop Design for Best 2A of output current. Transient Response, Robust Loop Stability with The internal synchronous low on-resistance power Low-ESR (MLCC) C OUT switches increase efficiency and eliminate the need for Soft-Start 1.2ms PGOOD Function in SOT-23-6 an external Schottky diode. The Current Mode Constant-On-time (CMCOT) operation with internal Applications compensation allows the transient response to be STB, Cable Modem, & xDSL Platforms optimized over a wide range of loads and output LCD TV Power Supply & Metering Platforms capacitors. The RT8097B is available in the SOT-23-5/6 General Purpose Point of Load (POL) package. Ordering Information Pin Configurations (TOP VIEW) RT8097B Package Type FB VIN FB PG VIN B : SOT-23-5 E : SOT-23-6 5 4 6 5 4 Lead Plating System G : Green (Halogen Free and Pb Free) 2 3 2 3 UVP Option EN GND LX EN GND LX H : Hiccup L : Latched-Off SOT-23-5 SOT-23-6 B : Forced PWM Note : Richtek products are : RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. Simplified Application Circuit L RT8097B V IN LX VIN V OUT C IN C R1 OUT EN PG* FB GND R2 *For SOT-23-6 Package Only Copyright 2015 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS8097B-01 January 2015 www.richtek.com 1 RT8097B Marking Information RT8097BHGE RT8097BHGB 1T= : Product Code 4L= : Product Code DNN : Date Code 1T=DNN DNN : Date Code 4L=DNN RT8097BLGE RT8097BLGB 1S= : Product Code 4K= : Product Code DNN : Date Code 1S=DNN DNN : Date Code 4K=DNN Functional Pin Description Pin No. Pin Name Pin Function SOT-23-5 SOT-23-6 1 1 EN Enable Control Input. 2 2 GND Power Ground. 3 3 LX Switch Node. 4 4 VIN Supply Voltage Input. The RT8097B operates from a 2.7V to 5.5V input. Feedback Voltage Input. An external resistor divider from the output to 5 6 FB GND, tapped to the FB pin, sets the output voltage. Power Good Indicator. The output of this pin is an open-drain with -- 5 PG external pull-up resistor. PG is pulled up when the FB voltage is within 90%, otherwise it is LOW. Copyright 2015 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS8097B-01 January 2015 2