RT9081AGQZA(2) Richtek

RT9081A 500mA, 5.5V, Ultra Low Dropout Linear Regulator General Description Features Input Voltage Range : 0.8V to 5.5V The RT9081A is a high performance positive voltage Bias Voltage Range : 2.4 V to 5.5 V regulator with separated bias voltage (V ), designed BIAS Output Voltage Fixed and Adjustable Versions for applications requiring low input voltage and ultra low 0.9V to 1.8V (Fixed) dropout voltage, output current up to 500mA. The feature 0.8V to 3.6V (Adjustable) of ultra low dropout voltage is ideal for applications where 1.5% Output Voltage Accuracy 25C output voltage is very close to input voltage. The input Ultra Low Dropout Voltage : 140mV at 500mA voltage can be as low as 0.8V and the output voltage is Low Bias Input Current adjustable by an external resistive divider. The RT9081A 80A in Operating Mode features very low quiescent current consumption for 0.5A in Disable Mode portable applications. The device is available in the ZADFN- Enable Control 6L 1.2x1.2 package. Output Active Discharge Function (Optional) Stable with a 1F Output Ceramic Capacitor Pin Configuration RoHS Compliant and Halogen Free (TOP VIEW) VOUT 1 6 VIN Applications ADJ/NC 2 5 GND 7 EN 3 4 BIAS Battery Powered Systems Portable Electronic Device ZADFN-6L 1.2x1.2 Digital Set Top Boxes Ordering Information Nominal Output Lead Plating Pin 1 Product No. Option Package Voltage System Orientation RT9081A-09GQZA(2) 0.90V RT9081A-10GQZA 1.00V RT9081A-1KGQZA 1.05V (2): Quadrant RT9081A-11GQZA 1.10V 2 Follow EIA- RT9081A-1AGQZA(2) 1.15V 481-D G : Green Output Active ZADFN-6L RT9081A-12GQZA 1.20V (Halogen Free ***Empty Discharge 1.2x1.2 (Z-Type) and Pb Free) means Pin1 RT9081A-1BGQZA(2) 1.25V orientation is Quadrant 1 RT9081A-13GQZA(2) 1.30V RT9081A-15GQZA(2) 1.50V RT9081A-18GQZA(2) 1.80V RT9081AGQZA(2) Adjustable Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS9081A-00 November 2016 www.richtek.com 1 GN DRT9081A Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. Typical Application Circuit RT9081A V 6 1 IN V VIN VOUT OUT 2.5V 1.2V/500mA C IN C OUT 1F 1F (Effective value) 3 Enable EN V 4 BIAS BIAS 3.3V C BIAS 100nF GND 5, 7 (Exposed Pad) Figure 1. Fixed Voltage Regulator RT9081A V 6 1 IN V OUT VIN VOUT 2.5V 1.2V/500mA C IN C OUT R1 1F 1F (Effective value) 33.2k 3 2 Enable EN ADJ R2 4 V BIAS BIAS 66.5k 3.3V C BIAS 100nF GND 5, 7 (Exposed Pad) Figure 2. Adjustable Voltage Regulator Functional Pin Description Pin No. Pin Name Pin Function 1 VOUT Power output for the LDO. Test pin. Internal pull down by 2A. This pin should be floating or connected to 2 (Fixed) NC ground. 2 (Adj) ADJ Power output for the LDO. 3 EN LDO enable. Supply voltage for the LDO control circuit. Mandatory to power up V before BIAS 4 BIAS EN and VIN, this will ensure RT9081A performance follows datasheet spec. For more information please see Chip Enable Operation section. Ground. The exposed pad must be soldered to a large PCB and connected to 5, 7 (Expose pad) GND GND for maximum power dissipation. 6 VIN Power input for the LDO. Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS9081A-00 November 2016 2