RT9715 90m, 2A/1.5A/1.1A/0.7A High-Side Power Switches with Flag General Description Features zz z zz 90m (typ.) N-MOSFET Switch The RT9715 is a cost-effective, low-voltage, single zz z zz Operating Range : 2.7V to 5.5V N-MOSFET high-side Power Switch IC for USB application. zz z zz Reverse Blocking Current Low switch-on resistance (typ. 90m) and low supply zz z zz Under Voltage Lockout current (typ. 50uA) are realized in this IC. zz z zz Deglitched Fault Report (FLG) The RT9715 integrates an over-current protection circuit, zz z zz Thermal Protection with Foldback a short fold back circuit, a thermal shutdown circuit and an zz z zz Over Current Protection under-voltage lockout circuit for overall protection. Besides, zz z zz Short Circuit Protection a flag output is available to indicate fault conditions to the zz z zz UL ApprovedE219878 local USB controller. Furthermore, the chip also integrates zz z zz Nemko ApprovedNO49621 an embedded delay function to prevent miss-operation from zz z zz RoHS Compliant and Halogen Free happening due to inrush-current. The RT9715 is an ideal solution for USB power supply and can support flexible Applications applications since it is available in various packages such z USB Peripherals as SOT-23-5, SOP-8, MSOP-8 and WDFN-8L 3x3. z Notebook PCs Ordering Information RT9715 Pin Configurations Package Type (TOP VIEW) VIN EN/EN B : SOT-23-5 VIN EN/EN BG : SOT-23-5 (G-Type) 5 4 5 4 BR : SOT-23-5 (R-Type) S : SOP-8 23 23 F : MSOP-8 VOUT GND FLG QW : WDFN-8L 3x3 (W-Type) VOUT GND NC SOT-23-5 SOT-23-5 (G-Type) Lead Plating System G : Green (Halogen Free and Pb Free) VIN VOUT Output Current/EN Function 5 4 GND 8 VOUT A : 2A/Active High VIN 2 7 VOUT B : 2A/Active Low 23 VIN 3 6 VOUT C : 1.5A/Active High EN/EN 4 5 FLG D : 1.5A/Active Low EN/EN FLG GND E : 1.1A/Active High SOP-8/MSOP-8 SOT-23-5 (R-Type) F : 1.1A/Active Low G : 0.7A/Active High H : 0.7A/Active Low GND 1 8 VOUT Note : VIN 2 7 VOUT VIN 3 6 VOUT Richtek products are : 9 5 4 EN/EN FLG RoHS compliant and compatible with the current require- WDFN-8L 3x3 ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. DS9715-03 April 2011 www.richtek.com 1 GND+ RT9715 Typical Application Circuit Pull-Up Resistor (10K to 100K) USB Controller Supply Voltage Over -Current VIN FLG 2.7V to 5.5V C IN RT9715 1uF RT9715A/C/E/G VOUT V BUS Chip Enable EN/EN C D+ OUT 150uF GND 10uF D- RT9715B/D/F/H GND Chip Enable Ferrite Beads Data Note : A low-ESR 150uF aluminum electrolytic or tantalum between V and GND is strongly recommended to meet OUT the 330mV maximum droop requirement in the hub V . (see Application Information Section for further details) BUS Functional Pin Description Pin No. SOT-23-5 SOT-23-5 SOP-8 / WDFN-8L Pin Name Pin Function SOT-23-5 (G-Type) (R-Type) MSOP-8 3X3 1 1 5 6 , 7 , 8 6 , 7 , 8 VOUT Output Voltage. 2 2 2 1 1 GND Ground. 3 -- 1 5 5 FLG Fault FLAG Output. 4 4 3 4 4 EN/EN Chip Enable (Active High/Low). 5 5 4 2 , 3 2 , 3 VIN Power Input Voltage. -- 3 -- -- -- NC No Internal Connection. The exposed pad must be soldered to a large 9 (Exposed -- -- -- -- PCB and connected to GND for maximum Pad) power dissipation. Function Block Diagram VIN Bias EN/EN Current UVLO Limiting Gate Charge Oscillator Control Pump Output Voltage VOUT Detection Thermal Protection Auto Discharge FLG Delay GND www.richtek.com DS9715-03 April 2011 2
