RTQ2102A-QA 1.5A, 6V, Low I ACOT Synchronous Step-Down Converter Q General Description Features 3V to 6V Input Voltage Range The RTQ2102A-QA is a full featured 6V, 1.5A, Advanced Advanced COT Control Loop Design Constant-On-Time (ACOT) synchronous step-down Fast Transient Response converter with two integrated MOSFETs. The advanced Internal 110m and 90m Synchronous Rectifier COT operation allows transient responses to be optimized Highly Accurate V Regulation Over Load/Line OUT over a wide range of loads, and output capacitors to Range efficiently reduce external component count. The Robust Loop Stability with Low-ESR C OUT RTQ2102A-QA provides up to 2.7MHz switching frequency Automotive Temperature Range 40C to 125C to minimize the size of output inductor and capacitors. AEC-Q100 Grade 1 Qualified The RTQ2102A-QA is available in the WDFN-8L 3x3 package. Applications Mobile Phones and Handheld Devices Ordering Information STB, Cable Modem, and xDSL Platforms RTQ2102A -QA WLAN ASIC Power / Storage (SSD and HDD) Grade General Purpose for POL LV Buck Converter QA : AEC-Q100 Qualified and Screened by High Temperature Automotive Infotainment Automotive Instrument Clusters & HUD Package Type QW : WDFN-8L 3x3 (W-Type) Car Connectivity Lead Plating System G : Green (Halogen Free and Pb Free) Pin Configuration Note : (TOP VIEW) Richtek products are : EN 1 8 VIN RoHS compliant and compatible with the current require- PGND 2 7 LX AGND 3 6 PGOOD ments of IPC/JEDEC J-STD-020. 4 9 5 VOS FB Suitable for use in SnPb or Pb-free soldering processes. WDFN-8L 3x3 Simplified Application Circuit RTQ2102A-QA Power Good VIN PGOOD V 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. DSQ2102A-QA-00 June 2017 www.richtek.com 1 GNDRTQ2102A-QA Marking Information HX= : Product Code YMDNN : Date Code HX=YM DNN 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 Limit LX V Ramp REF Detector Generator 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 DSQ2102A-QA-00 June 2017 2 - +