RT9055-CFWSC Richtek

RT9055 300mA Dual LDO Regulator General Description Features Wide Operating Voltage Range : 1.5V to 5.5V The RT9055 is a dual channel, low noise, and low dropout Low Noise for RF Application regulator sourcing up to 300mA at each channel. The output No Noise Bypass Capacitor Required voltage range is from 0.9V to 3.5V with an input voltage Fast Response in Line/Load Transient range from 1.5V to 5.5V. TTL Logic Controlled Shutdown Input The RT9055 offers 2% accuracy, extremely low dropout Low Temperature Coefficient voltage and extremely low quiescent current (only 29A Dual LDO Outputs (300mA/300mA) per LDO). The shutdown current is near zero which is Ultra-Low Quiescent Current : 29A/LDO suitable for battery powered applications. The RT9055 also High Output Accuracy 2% provides protection functions such as current limiting, Short Current Protection output short circuit protection, and over temperature Thermal Shutdown Protection protection. Current Limit Protection The RT9055 allows stable operation with very small Short Circuit Thermal Folded Back Protection ceramic output capacitors, hence minimizing required RoHS Compliant and Halogen Free board space and component cost. Applications The RT9055 is available in a WL-CSP-6B 0.8x1.2 package. Cellular Handsets Ordering Information Battery Powered Equipment RT9055- Hand-Held Instruments Package Type Portable Information Appliances WSC : WL-CSP-6B 0.8x1.2 Output Voltage : VOUT1/VOUT2 Pin Configurations VOUT2 > VOUT1 is Recommended (TOP VIEW) Note : A1 A2 EN1 VOUT1 Richtek products are : B1 B2 GND VIN RoHS compliant and compatible with the current require- EN2 C1 C2 VOUT2 ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. WSC-CSP-6B 0.8x1.2 Marking Information Available Voltage Version For marking information, contact our sales representative Code Voltage Code Voltage Code Voltage directly or through a Richtek distributor located in your A 3.5 B 1.3 C 1.2 area. D 1.85 E 2.1 F 1.5 G 1.8 H 2 J 2.5 K 2.6 L 2.7 M 2.8 N 2.85 P 3 Q 3.1 R 3.2 S 3.3 T 2.65 V 2.9 W 1.6 X 3.15 Y 1.9 U 1.4 Z 1.25 2 1.1 3 1 Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS9055-02 August 2014 www.richtek.com 1RT9055 Typical Application Circuit A2 B2 V VOUT1 V IN VIN OUT1 C OUT1 C IN 1F 1F RT9055 C2 A1 EN1 VOUT2 V OUT2 Chip Enable C OUT2 C1 EN2 1F GND B1 Functional Pin Description Pin No. Pin Name Pin Function A1 EN1 LDO1 Enable (Active High). A2 VOUT1 LDO1 Output Voltage. B1 GND Ground. B2 VIN Supply Input. C1 EN2 LDO2 Enable (Active High). C2 VOUT2 LDO2 Output Voltage. Function Block Diagram EN1 Shutdown VIN 13A and Logic Control V REF Output Driver + VOUT1 Current Limit and Thermal Protection EN2 Shutdown 13A and Logic Control V REF Output Driver + VOUT2 Current Limit and Thermal Protection GND Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS9055-02 August 2014 2 - -