RT8010CGQW Richtek

RT8010C 1.5MHz, 1A, High Efficiency PWM Step-Down DC/DC Converter General Description Features 2.5V to 5.5V Input Voltage Range The RT8010C is a high efficiency Pulse-Width-Modulated Output Voltage (Adjustable Output From 0.6V to V ) (PWM) step-down DC/DC converter, and is capable of IN 1A Output Current delivering 1A output current over a wide input voltage range Up to 95% Efficiency from 2.5V to 5.5V. The RT8010C is ideally suited for No Schottky Diode Required portable electronic devices that are powered from 1-cell 1.5MHz Fixed Switching Frequency Li-ion battery or from other power sources such as cellular Current Limit phones, PDAs and hand-held devices. Input UVLO Protection Two operating modes are available including : PWM/Low- Thermal Shutdown Dropout autoswitch and shutdown modes. The Internal Small 6-Lead WDFN Package synchronous rectifier with low R dramatically reduces DS(ON) RoHS Compliant and Halogen Free conduction loss at PWM mode. No external Schottky diode is required in practical application. Applications The RT8010C enters Low Dropout mode when normal Mobile Phones PWM cannot provide regulated output voltage by Personal Information Appliances continuously turning on the upper P-MOSFET. RT8010C Wireless and DSL Modems enters shut-down mode and consumes less than 0.1A MP3 Players when the EN pin is pulled low. Portable Instruments The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operating Ordering Information frequency of 1.5MHz. Small WDFN-6L 2x2 package RT8010C provides small PCB area application. Other features include Package Type soft start, lower internal reference voltage with 2% QW : WDFN-6L 2x2 (W-Type) accuracy, over temperature protection, and over current Lead Plating System protection. G : Green (Halogen Free and Pb Free) Note : Marking Information Richtek products are : 1E : Product Code RoHS compliant and compatible with the current require- W : Date Code 1EW ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. Simplified Application Circuit L V VIN IN LX V OUT RT8010C C IN C OUT EN VOUT GND Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS8010C-00 September 2012 www.richtek.com 1RT8010C Pin Configurations (TOP VIEW) 1 6 NC FB/VOUT 2 5 EN GND VIN 3 7 4 LX WDFN-6L 2x2 Functional Pin Description Pin No. Pin Name Pin Function 1 NC No Internal Connection. Leave floating or connect to ground. 2 EN Chip Enable (Active High). 3 VIN Power Input. 4 LX Switch Node. Connect this pin to the external inductor. 5, Ground. The exposed pad must be soldered to a large PCB and connected to GND 7 (Exposed Pad) GND for maximum power dissipation. 6 FB/VOUT Feedback/Output Voltage Sense Input. Function Block Diagram EN VIN RS1 OSC & Current Shutdown Limit Control Detector Slope Compensation Current Sense Control Driver LX Logic PWM Comparator FB/VOUT Error Amplifier UVLO & RS2 Power Good Detector GND V REF Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS8010C-00 September 2012 2 GND