RTQ2103A-QA 2A, 6V, Low I ACOT Synchronous Step-Down Converter Q General Description Features AEC-Q100 Grade 1 Qualified The RTQ2103A is a full featured 6V, 2A, Advanced 3V to 6V Input Voltage Range Constant-On-Time (ACOT) synchronous step-down Advanced COT Control Loop Design converter with two integrated MOSFETs. The advanced Fast Transient Response COT operation allows transient responses to be optimized Internal 130m and 105m Synchronous Rectifier over a wide range of loads, and output capacitors to Highly Accurate V Regulation Over Load/Line OUT efficiently reduce external component count. The Range RTQ2103A provides up to 2.7MHz switching frequency to Robust Loop Stability with Low-ESR C OUT minimize the size of output inductor and capacitors. The Automotive Temperature Range 40C to 125C RTQ2103A is available in the SOP-8 (Exposed Pad) package. Applications Ordering Information Mobile Phones and Handheld Devices -QA RTQ2103A STB, Cable Modem, and xDSL Platforms Grade WLAN ASIC Power / Storage (SSD and HDD) QA : AEC-Q100 Qualified and General Purpose for POL LV Buck Converter Screened by High Temperature Automotive Infotainment Package Type Automotive Instrument Clusters & HUD SP : SOP-8 (Exposed Pad-Option 2) Car Connectivity Lead Plating System G : Green (Halogen Free and Pb Free) Note : Pin Configuration Richtek products are : (TOP VIEW) RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. 8 EN VIN 2 7 PGND LX Suitable for use in SnPb or Pb-free soldering processes. GND 3 6 AGND PGOOD 9 4 FB 5 VOS Marking Information SOP-8 (Exposed Pad) RTQ2103AGSPQA : Product Number RTQ2103A YMDNN : Date Code GSPQAYMDNN Simplified Application Circuit RTQ2103A Power Good V VIN PGOOD IN EN LX V OUT PGND R1 VOS FB AGND R2 Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DSQ2103A-QA-00 June 2017 www.richtek.com 1RTQ2103A-QA Functional Pin Description Pin No. Pin Name Pin Function 1 EN Enable control input. Pull high to enable. 2, Power ground. The exposed pad must be soldered to a large PCB and connected PGND 9 (Exposed Pad) to PGND for maximum power dissipation. 3 AGND Analog ground. Should be electrically connected to GND close to the device. 4 FB Feedback voltage input. Output voltage sense pin for the internal control loop. Must be connected to 5 VOS output. Power good open-drain output. This pin is pulled to low if the output voltage is 6 PGOOD below regulation limits. Can be left floating if not used. Switch node. The Source of the internal high-side power MOSFET, and Drain of 7 LX the internal low-side (synchronous) rectifier MOSFET. 8 VIN Power input supply voltage, 3V to 6V. Functional Block Diagram EN VOS AGND UVLO Shutdown Control LX OTP TON VIN Error Amplifier Comparator + - + FB Logic + LX Driver - Control Current V Limit LX Ramp REF Generator Detector PGOOD LX LX AZC PGND V FB Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DSQ2103A-QA-00 June 2017 2 - +