RT9701GB Richtek

RT9701 100m Power Distribution Switches General Description Features zz z zz 100m Typ. High-Side NMOSFET (SOT-23-5) The RT9701 is an integrated 100m power switch for zz z zz Guaranteed 1.1A Continuous Current self-powered and bus-powered Universal Series Bus zz z zz 1.5A Current Limit (USB) applications. A built-in charge pump is used to zz z zz Small SOT-23-5 Package Minimizes Board Space drive the N-Channel MOSFET that is free of parasitic zz z zz Soft Start body diode to eliminate any reversed current flow across zz z zz Thermal Protection the switch when it is powered off. Its low quiescent current zz z zz Low 23uA Supply Current (23uA) and small package (SOT-23-5) is particularly zz z zz Wide Input Voltage Range : 2.2V to 6V suitable in battery-powered portable equipment. zz z zz UL Approved - E219878 Several protection functions include soft start to limit inrush zz z zz RoHS Compliant and 100% Lead (Pb)-Free current during plug-in, current limiting at 1.5A to meet USB power requirement, and thermal shutdown to protect Applications damage under over current conditions. z Battery-Powered Equipment z Motherboard USB Power Switch Ordering Information z USB Device Power Switch RT9701 z Hot-Plug Power Supplies Package Type z Battery-Charger Circuits B : SOT-23-5 BL : SOT-23-5 (L-Type) Pin Configurations Operating Temperature Range P : Pb Free with Commercial Standard (TOP VIEW) G : Green (Halogen Free with Commer- cial Standard) VOUT EN VOUT VIN Note : 5 4 5 4 Richtek Pb-free and Green products are : 23 23 RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. GND VOUT VIN VOUT GND VIN Suitable for use in SnPb or Pb-free soldering processes. SOT-23-5 SOT-23-5 (L-Type) Marking Information Typical Application Circuit For marking information, contact our sales representative directly or through a Richtek distributor located in your RT9701xBL V V VIN VOUT OUT IN area, otherwise visit our website for detail. VIN VOUT * C C OUT IN GND 470uF 1uF * 470uF, Low ESR Electrolytic DS9701-15 June 2009 www.richtek.com 1+ + + RT9701 Test Circuits V IN-SW V IN V OUT V V RT9701xBL IN OUT I OUT RT9701xBL VIN VOUT Switch Off VIN VOUT VIN VOUT + C + C L R VIN VOUT IN L C GND IN C I L L 1uF R GND L 1uF Test Circuit 1 Test Circuit 2 V V IN OUT I OUT RT9701xB VIN VOUT + EN VOUT C IN C I L L R GND L 1uF Chip Enable Test Circuit 3 Test Circuit 2 is performed by charging an external tank of bulk capacitor to the input then applying this voltage to the input of the unit. All typical operating characteristics curves showed are referred to Test Circuit 1, unless specified to Test Circuit 2 or Test Circuit 3. Functional Pin Description Pin Name Pin Function VIN Power Input Voltage VOUT Output Voltage GND Ground EN Chip Enable (Active High) Function Block Diagram VIN EN (VIN) Current Bias RS Limit Charge Control Pump (VOUT) NMOSFET VOUT Oscillator Thermal GND Detection www.richtek.com DS9701-15 June 2009 2