RT9712AGF Richtek

RT9712 90m, 1A/1.5A High-Side Dual Power Switches with Flag General Description Features zz z zz 90m N-MOSFET Switch The RT9712 power-distribution switches are designed to zz z zz Operating Voltage Range : 2.7V to 5.5V fulfill the applications in heavy capacitive loads and short- zz z zz Reverse Blocking Current circuit situations. The device incorporates two 90m N- zz z zz Under Voltage Lockout MOSFET power switches to fit power distribution systems zz z zz Deglitched Fault Report (FLGx) requiring multiple power switches in a single package. zz z zz Thermal Protection with Foldback During switching process, an internal charge pump is zz z zz Over Current Protection designed to provide the gate drive for the purpose of power- zz z zz Short Circuit Protection switch rise times and fall times controlling to minimize zz z zz UL ApprovedE219878 the current surges. The charge pump can operate in supply zz z zz Nemko Approved-NO49352 voltage as low as 2.7V and needs no external zz z zz RoHS Compliant and Halogen Free components. If the output load exceeds the current-limit threshold or a Applications short-circuit occurs.The RT9712 series pull the overcurrent z USB Peripherals (FLGx) logic output low by switching into the constant- z Notebook PCs current mode to maintain the output current in a safe level, A thermal protection circuit turns off the switch to prevent Ordering Information the device from damage when power dissipation is RT9712 increased by continuous heavy overloads and short-circuits Package Type in the switch and finally cause the rise of the junction S : SOP-8 temperature. The device automatically recovers when it F : MSOP-8 has sufficiently cooled down. The RT9712A/B are designed Lead Plating System for the current limit at typically 2A and RT9712C/D are G : Green (Halogen Free and Pb Free) designed for the current limit at typically 1.5A. Internal Output Current/ENx Function circuitry controls the switch to remain off until valid input A : 1.5A/Active High B : 1.5A/Active Low voltage is presented. C : 1A/Active High D : 1A/Active Low Pin Configurations Note : (TOP VIEW) Richtek products are : GND 8 FLG1 RoHS compliant and compatible with the current require- 2 VIN 7 VOUT1 ments of IPC/JEDEC J-STD-020. EN1 3 6 VOUT2 Suitable for use in SnPb or Pb-free soldering processes. 4 EN2 5 FLG2 RT9712A/C Marking Information GND 8 FLG1 For marking information, contact our sales representative 2 VIN 7 VOUT1 directly or through a Richtek distributor located in your EN1 3 6 VOUT2 area. 4 EN2 5 FLG2 RT9712B/D SOP-8/MSOP-8 Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS9712-04 November 2012 www.richtek.com 1RT9712 Typical Application Circuit RT9712A/B/C/D Supply Voltage 2 7 VOUT1 Load VIN 2.7V to 5.5V C IN C OUT1 R1 R2 0.1uF 22uF 0.1uF 8 FLG1 6 5 VOUT2 Load FLG2 C OUT2 3 RT9712A/C 22uF EN1/EN1 0.1uF 1 Chip Enable GND 4 RT9712B/D EN2/EN2 Chip Enable Note : R1, R2 : Pull-Up Resistance (10k to 100k) Functional Pin Description Pin No. Pin Name Pin Function RT9712A/C RT9712B/D 1 1 GND Ground. 2 2 VIN Input Voltage. -- 3 EN1 Chip Enable (Active Low) turns on power switch in VOUT1. -- 4 EN2 Chip Enable (Active Low) turns on power switch in VOUT2. 3 -- EN1 Chip Enable (Active High) turns on power switch in VOUT1. 4 -- EN2 Chip Enable (Active High) turns on power switch in VOUT2. Over current or over temperature status output, open-drain output, active FLG2 5 5 low, in VOUT2. 6 6 VOUT2 Power-Switch Output, in VOUT2. 7 7 VOUT1 Power-Switch Output, in VOUT1. Over current or over temperature status output,, open-drain output, active FLG1 8 8 low, in VOUT1. Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS9712-04 November 2012 2