RT8010GQW

® RT8010/A 1.5MHz, 1A, High Efficiency PWM Step-Down DC/DC Converter General Description Features The RT8010/A is a high efficiency Pulse-Width-Modulated (PWM) step-down DC/DC converter. Capable of delivering 1A output current over a wide input voltage range from 2.5V to 5.5V, the RT8010/A is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources such as cellular phones, PDAs and hand-held devices.  2.5V to 5.5V Input Range  Output Voltage (Adjustable Output From 0.6V to VIN)  RT8010 : 1V, 1.2V, 1.5V, 1.6V, 1.8V, 2.5V and 3.3V Fixed/Adjustable Output Voltage  RT8010A Adjustable Output Voltage Only 1A Output Current 95% Efficiency No Schottky Diode Required 1.5MHz Fixed-Frequency PWM Operation Small 6-Lead WDFN and 16-Lead WQFN Package RoHS Compliant and 100% Lead (Pb)-Free Two operating modes are available including : PWM/LowDropout autoswitch and shutdown modes. The Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical application. The RT8010/A enters Low Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. RT8010/A enter shut-down mode and consumes less than 0.1μA when EN pin is pulled low. The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operating frequency of 1.5MHz. This along with small WDFN-6L 2x2 and WQFN-16L 3x3 package provides small PCB area application. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection.       Applications      Mobile Phones Personal Information Appliances Wireless and DSL Modems MP3 Players Portable Instruments Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. Pin Configurations IC LX LX LX (TOP VIEW) 16 15 14 13 IC EN VIN 1 6 2 5 3 7 4 FB/VOUT GND LX GND GND GND FB/VOUT 1 12 2 11 3 10 VIN VIN 9 VIN 17 4 6 7 8 GND IC EN IC 5 VIN WDFN-6L 2x2 (RT8010) WQFN-16L 3x3 (RT8010A) Copyright © 2015 Richtek Technology Corporation. All rights reserved. DS8010/A-10 February 2015 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 ® RT8010/A Ordering Information RT8010/A(- ) Pin 1 Orientation*** (3) : Quadrant 3, Follow EIA-481-D (For RT8010AGQW Only) Package Type QW : WDFN/WQFN (W-Type) Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free) Output Voltage Default : Adjustable (RT8010/A) Fixed (RT8010) 10 : 1.0V 12 : 1.2V 15 : 1.5V 16 : 1.6V 18 : 1.8V 25 : 2.5V 33 : 3.3V WQFN-16L 3x3 WDFN-6L 2x2 Note : ***Empty means Pin1 orientation is Quadrant 1 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. Copyright © 2015 Richtek Technology Corporation. All rights reserved. DS8010/A-10 February 2015 is a registered trademark of Richtek Technology Corporation. www.richtek.com 2 RT8010/A Typical Application Circuit VIN 2.5V to 5.5V 3 CIN 4.7µF VIN LX L 2.2µH 4 VOUT RT8010/A 2 1 EN VOUT IC GND 6 COUT 10µF 5 Figure 1. Fixed Voltage Regulator VIN 2.5V to 5.5V 3 LX 4 VOUT CIN C1 RT8010/A 4.7µF 2 1 VOUT  VREF VIN L 2.2µH EN FB IC GND R1 COUT 6 10µF 5 IR2 x  1  R1   R2  R2 with R2 = 300kΩ to 60kΩ so the IR2 = 2μA to 10μA, and (R1 x C1) should be in the range between 3x10-6 and 6x10-6 for component selection. Figure 2. Adjustable Voltage Regulator Layout Guide RT8010/A_ADJ RT8010/A_FIX IC 1 6 VOUT EN 2 5 GND Output capacitor must be near RT8010 3 1 6 FB EN 2 5 GND VIN 3 4 LX 4 LX COUT COUT CIN CIN must be placed to the VIN as close as possible. Output capacitor must be near RT8010/A L1 L1 VIN IC CIN LX should be connected to Inductor by wide and short trace, keep sensitive components away from this trace. CIN must be placed to the VIN as close as possible. LX should be connected to Inductor by wide and short trace, keep sensitive components away from this trace. R1 R2 Figure 3 Layout note : 1. The distance that CIN connects to VIN is as close as possible (Under 2mm). 2. COUT should be placed near RT8010/A. Copyright © 2015 Richtek Technology Corporation. All rights reserved. DS8010/A-10 February 2015 is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT8010/A Functional Pin Description Pin No. Pin Name Pin Function RT8010 RT8010A 1 6, 8, 16 IC Internal Connection. Leave floating and do not make connection to this pin. 2 7 EN Chip Enable (Active High). 3 9, 10, 11, 12 VIN Power Input. (Pin 9 and Pin 10 must be connected with Pin 11). 4 13, 14, 15 LX Pin for Switching. (Pin 13 must be connected with Pin 14). 5 1, 2, 3, 5 GND Ground. 6 4 FB/VOUT Feedback/Output Voltage. Ground. The exposed pad must be soldered to a large PCB and 7 (Exposed Pad) 17 (Exposed Pad) GND connected to GND for maximum thermal dissipation. Function Block Diagram EN VIN RS1 OSC & Shutdown Control Slope Compensation FB/VOUT Error Amplifier Current Limit Detector Current Sense Control Logic PWM Comparator Driver LX RC COMP UVLO & Power Good Detector RS2 VREF GND Copyright © 2015 Richtek Technology Corporation. All rights reserved. www.richtek.com 4 is a registered trademark of Richtek Technology Corporation. DS8010/A-10 February 2015 RT8010/A Absolute Maximum Ratings           (Note 1) Supply Input Voltage ------------------------------------------------------------------------------------------------EN, FB Pin Voltage -------------------------------------------------------------------------------------------------LX Pin Switch Voltage ----------------------------------------------------------------------------------------------