RT9172-18GM Richtek

RT9172 3A Fixed Output Voltage LDO Regulator General Description Features Low Dropout Voltage The RT9172 series of low dropout linear regulators operate Low Ground Pin Current from a 2.25V to 6V input supply. A wide range of preset Load Regulation of 0.4% at 3A output voltage options is available. These low dropout 0.5mA Quiescent Current in Shutdown Mode linear regulators respond very fast to step changes in load, Guaranteed Output Current of 3A DC which are suitable for low voltage microprocessor Available in TO-263 and TO-220 Packages applications. The RT9172 uses an internal P-MOSFET as Output Voltage Accuracy 1.5% the pass device, which does not cause extra GND current Error Flag Indicates Output Status in heavy load and dropout condition. The shutdown mode Sense Option Improves Better Load Regulation of low operation current makes the IC suitable for power- Extremely Low Output Capacitor Requirements saving systems. The other features include current limiting Over Temperature/Over- Current Protection and over temperature protection. RoHS Compliant and 100% Lead (Pb)-Free Ordering Information Applications - RT9172 Microprocessor Power Supplies Package Type GTL, GTL+, BTL, and SSTL Bus Terminators T5 : TO-220-5 Power Supplies for DSPs M5 : TO-263-5 T : TO-220 SCSI Terminator M : TO-263 Post Regulators G : SOT-223 High Efficiency Linear Regulators S : SOP-8 Battery Chargers Lead Plating System Other Battery Powered Applications P : Pb Free G : Green (Halogen Free and Pb Free) Pin Configurations Output Voltage (TOP VIEW) 1.5V to 3.3V (with 0.1V per step) S : Pin Out Exchange N : Pin 5 bond SENSE 1 23 F : Pin 5 bond FLG Note : Richtek products are : TO-220 VIN GND VOUT (TAB) RoHS compliant and compatible with the current require- TO-263 ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. VOUT VIN 8 SENSE 2 GND 7 Marking Information 1 23 GND 3 6 GND NC 45 EN For marking information, contact our sales representative VIN GND VOUT SOP-8 directly or through a Richtek distributor located in your (TAB) area. SOT-223 Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS9172-18 August 2013 www.richtek.com 1 1 23 VIN GND VOUT (TAB)+ + RT9172 5 5 SENSE/FLG SENSE/FLG 4 VOUT 4 VOUT 3 GND (TAB) 3 GND (TAB) 2 VIN 2 VIN 1 EN 1 EN TO-220-5 TO-263-5 RT9172N- xT5 RT9172N- xM5 RT9172F- xT5 RT9172F- xM5 5 VOUT 5 VOUT 4 4 SENSE SENSE 3 GND (TAB) 3 GND (TAB) 2 EN 2 EN 1 VIN 1 VIN TO-220-5 TO-263-5 RT9172S- xT5 RT9172S- xM5 Functional Pin Description Pin No. RT9172- xT Pin Name Pin Function RT9172F RT9172N RT9172S RT9172- xM RT9172- xG 1 1 2 -- EN Chip Enable. (Active Hight) 2 2 1 1 VIN Power Input Voltage. 3 3 3 2 GND Ground. 4 4 5 3 VOUT Output Voltage. ERROR Flag. 5 -- -- -- FLG -- 5 4 -- SENSE Remote Sense. Typical Application Circuit RT9172-25 V OUT V = 3.3V VIN VOUT IN 2.5V, 3A C GND IN C OUT 10uF Figure 1 Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS9172-18 August 2013 2