RT9711DGB

RT9711A/B/C/D 80m, 1.5A/0.6A High-Side Power Switches with Flag General Description Features zz z zz Compliant to USB Specifications The RT9711A/B/C/D are cost-effective, low voltage, single zz z zz Built-In N-MOSFET N-MOSFET high-side power switches, optimized for self- Typical R : 80m (SOT-23-5 & TSOT-23-5) and DS(ON) powered and bus-powered Universal Serial Bus (USB) 90m (SOP-8 & MSOP-8) applications. The RT9711 series are equipped with a zz z zz Output Can Be Forced Higher Than Input (Off-State) charge pump circuitry to drive the internal MOSFET switch. zz z zz Low Supply Current : The switch s low R , 80m, meets USB voltage drop DS(ON) 25A Typical at Switch On State requirements. A flag output is available to indicate fault 1A Typical at Switch Off State conditions to the local USB controller. zz z zz Guaranteed 1.5A for RT9711A/B and 0.6A for Additional features include soft-start to limit inrush current RT9711C/D Continuous Load Current during plug-in, thermal shutdown to prevent catastrophic zz z zz Wide Input Voltage Ranges : 2.5V to 5.5V switch failure from high-current loads, under-voltage zz z zz Open-Drain Fault Flag Output lockout (UVLO) to ensure that the device remains off zz z zz Hot Plug-In Application (Soft-Start) unless there is a valid input voltage present, fault current zz z zz 1.7V Typical Under-Voltage Lockout (UVLO) is limited to typically 2.5A for RT9711A/B in dual ports zz z zz Current Limiting Protection and 1A for RT9711C/D in single port in accordance with zz z zz Thermal Shutdown Protection the USB power requirements, lower quiescent current as zz z zz Reverse Current Flow Blocking (no body diode) 25A making this device ideal for portable battery-operated zz z zz Smallest SOT-23-5 and TSOT-23-5 Packages equipment. Minimizes Board Space The RT9711 series are available in SOT-23-5, TSOT-23-5, zz z zz UL ApprovedE219878 SOP-8 and MSOP-8 packages fitting different aspect of zz z zz TUV IEC60950-1 : 2005 Certified broad applications. zz z zz RoHS Compliant and 100% Lead (Pb)-Free Ordering Information Applications RT9711 z USB Bus/Self Powered Hubs Package Type B : SOT-23-5 z USB Peripherals BG : SOT-23-5 (G-Type) z ACPI Power Distribution J5 : TSOT-23-5 z PC Card Hot Swap S : SOP-8 z Notebook, Motherboard PCs F : MSOP-8 z Battery-Powered Equipment Lead Plating System z Hot-Plug Power Supplies P : Pb Free z Battery-Charger Circuits G : Green (Halogen Free and Pb Free) Output Current/EN Function A : 1.5A/Active High Marking Information B : 1.5A/Active Low For marking information, contact our sales representative C : 0.6A/Active High directly or through a Richtek distributor located in your D : 0.6A/Active Low Note : area. Richtek products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. DS9711A/B/C/D-03 April 2011 www.richtek.com 1+ RT9711A/B/C/D Pin Configurations (TOP VIEW) VOUT VIN EN/EN VIN GND 8 VOUT 5 4 5 4 VIN 2 7 VOUT 3 6 VIN VOUT 23 23 4 5 EN/EN FLG GND EN/EN FLG VOUT GND NC SOP-8/MSOP-8 SOT-23-5/TSOT-23-5 SOT-23-5 (G-Type) Typical Application Circuit Functional Pin Description Pull-Up Resistor (10K to 100K) Pin Name Pin Function USB Controller Supply VIN Power Input Voltage Voltage 5V Over -Current VIN FLG VOUT Output Voltage C IN RT9711A/B/C/D GND 1F Ground EN/EN Chip Enable. Never let this pin floating. VOUT V RT9711A/C BUS EN/EN C OUT Chip Enable D+ (Active High for RT9711A/C, Active Low 150F GND D- 10F for RT9711B/D) GND RT9711B/D FLG Open-Drain Fault Flag Output Chip Enable Ferrite Beads Data Note: A low-ESR 150F aluminum electrolytic or tantalum between V and GND is strongly recommended to meet OUT the 330mV maximum droop requirement in the hub V . BUS (see Application Information Section for further details) Function Block Diagram VIN EN/EN Bias Current UVLO Limiting Gate Charge Oscillator Control Pump Output Voltage VOUT Detection Thermal Protection FLG Delay GND www.richtek.com DS9711A/B/C/D-03 April 2011 2