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| SP2525A USB High-Side Power Switch FEATURES +3.0V to +5.5V Input Voltage Range 500mA Continuous Load Current per Channel 2.6V Undervoltage Lockout 1.25A Short Circuit Current Limit 100m Maximum On-Resistance 75A On-State Supply Current 1A Shutdown Current Output can be Forced Higher than Input (Off-State) Thermal Shutdown Slow Turn On and Fast Turn Off EN 1 FLG 2 GND 3 NC 4 8 OUT SP2525A 8 Pin NSOIC 7 IN 6 OUT 5 IN Now Available in Lead Free Packaging Active-High Version: SP2525A-1 Active-Low Version: SP2525A-2 APPLICATIONS USB Power Management Hot Plug-In Power Supplies Battery Charger Circuit DESCRIPTION The SP2525A device is an integrated high-side power switch ideal for self-powered and buspowered Universal Serial Bus (USB) applications. The high-side switches are MOSFETs with 70m RDS(ON), which meets USB voltage drop requirements for maximum transmission wire length. Multi-purpose open-drain fault flag output indicates over-current limiting, thermal shutdown, or undervoltage lockout. Output current is typically limited to 0.85A below the 5A safety requirement, and the thermal shutdown function shuts the switch off to prevent damage under overcurrent conditions. Guaranteed minimum output rise time limits inrush current during hot plug-in, minimizing EMI and preventing the voltage at the upstream port from dropping excessively. TYPICAL APPLICATION CIRCUIT VCC 5.0V 33F 10K 4.50V TO 5.25V UPSTREAM VBUS 100mA MAX SPX1521 VBUS D+ D+ 1F Cin GND DATA IN OUT USB CONTROLLER ON/OFF OVERCURRENT + GND 10F Cout GND 0.01 F 33F, 16V Tantalum, or 100F, 10V Electrolytic Bold line indicate high-current traces GND NC OUT IN Ferrite Bead EN FLG (R) VIN OUT VBUS Ferrite Bead + 33F 0.01 F D+ D- SP2525A IN GND DATA One Port Self Powered Hub Date: 5/3/06 Rev I SP2525A USB High-Side Power Switch (c) Copyright 2006 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Supply Voltage(VIN)..........................................7.0V Fault Flag Voltage (VFLG)..................................7.0V Fault Flag Current (IFLG)..................................50mA Enable Input (VEN)...............................-0.3V to 15V Operating Temperature Range.............-40C to +85C Storage Temperature Range..............-65C to +150C Power Dissipation Per Package 8-pin NSOIC (derate 6.14mW/OC above +70OC)..................500mW ELECTRICAL CHARACTERISTICS Unless otherwise noted, the following specifications apply for VIN = +5.0V, TA = 25C. PARAMETER Supply Current Enable Input Voltage MIN. TYP. 0.75 75 MAX. 5.0 100 0.8 1 1 UNITS A V A pF CONDITIONS V EN = Logic "0" OUT = Open V EN = Logic "1" OUT = Open V EN = Logic "0" V EN = Logic "1" V EN = Logic "0" V EN = Logic "1" 2.4 Enable Input Current Enable Input Capacitance Output Mosfet Resistance Output Turn-On Delay Output Turn-On Rise Time Output Turn-Off Delay Output Turn-Off Fall Time Output Leakage Current Current Limit Threshold Over-Temperature Shutdown Threshold Error Flag Output Resistance Error Flag Off Current UVLO Threshold 0.6 1.7 2.0 0.01 0.01 1 70 100 1000 0.8 0.7 100 m s RL=10 each output RL=10 each output RL=10 each output RL=10 each output 4000 20 20 10 s s s A A OC 1.0 135 125 10 15 0.01 2.6 2.4 1.25 TJ increasing TJ decreasing V IN = 5V,IL = 10mA V IN = 3.3V,IL = 10mA V FLAG = 5V V IN increasing V IN decreasing 25 40 1 A V Date: 5/3/06 Rev I SP2525A USB High-Side Power Switch (c) Copyright 2006 Sipex Corporation 2 PIN DESCRIPTION Pin Number 1 2 Pin Name EN FLG Description Enable Input Active High for SP2525A-1 and Active Low for SP2525A-2. An active-low and open-drained fault flag output for power switch. It can indicate current limit if CTL is active. In normal mode operation, it also can indicate thermal shutdown or undervoltage. Chip power ground. Not internally connected. Power supply input. MOSFET switch output. 3 4 5, 7 6, 8 GND NC IN OUT TEST CIRCUIT 10K VCC +5V (R) ON EN OFF FLG GND SP2525A OUT IN 10 OUT NC IN 0.1F BLOCK DIAGRAM OUT FLG Driver EN Charge Pump Thermal Shutdown GND Current Limit CS Power N-MOSFET UVLO IN Date: 5/3/06 Rev I SP2525A USB High-Side Power Switch (c) Copyright 2006 Sipex Corporation 3 APPLICATION INFORMATION Error Flag The Error Flag is an open-drained output of an N-channel MOSFET, the FLG output is pulled low to signal the following fault conditions: input undervoltage, output current limit, and thermal shutdown. Current Limit The current limit threshold is preset internally. It protects the output MOSFET switches from damage resulting from undesirable short circuit conditions or excess inrush current, which is often encountered during hot plug-in. The low limit of the current limit threshold of the SP2525A allows a minimum current of 0.5A through the MOSFET switches. A current limit condition will signal the Error Flag. Thermal Shutdown When the temperature of the SP2525A exceeds 135C for any reasons, the thermal shutdown function turns off the MOSFET switch and signals the Error Flag. A hysteresis of 10C prevents the MOSFETs from turning back on until the chip temperature drops below 125C. Supply Filtering A 0.1F to 1F bypass capacitor from IN to GND, located near the device, is strongly recommended to control supply transients. Without a bypass capacitor, an output short may cause ringing on the input (from supply lead inductance) which can damage internal control circuitry. Transient Requirements USB supports dynamic attachment (hot plugin) of peripherals. A current surge is caused by the input capacitance of a downstream device. Ferrite beads are recommended in series with all power and ground connector pins. Ferrite beads reduce EMI and limit the inrush current during hot-attachment by filtering high-frequency signals. Short Circuit Transient Bulk capacitance provides the short-term transient current needed during a hot-attachment event. A 33 F/16V tantalum or a 100F/ 10V electrolytic capacitor mounted close to the downstream connector at each port should provide sufficient transient drop protection. Printed Circuit Layout The Power circuitry of USB printed circuit boards requires a customized layout to maximize thermal dissipation and to minimize voltage drop and EMI. Input and Output The independent solid state switch connects the IN pin to the OUT pin when enabled by a logic signal at EN. The IN pin is the power supply connection to the internal circuitry and the drain of the output MOSFET. The OUT pin is the source for the MOSFET. Typically, the current in USB application will flow through the switch from IN to OUT towards the load. If VOUT is greater than VIN when a switch is enabled, the current will flow from OUT to the IN pin because the MOSFET channels are bidirectional when switched on. The output source is allowed to be externally forced to a higher voltage than its input without causing unwanted current flow when the output is disabled. Date: 5/3/06 Rev I SP2525A USB High-Side Power Switch (c) Copyright 2006 Sipex Corporation 4 TYPICAL PERFORMANCE CHARACTERISTICS VIN = +5.0V, TAMB = +25OC unless otherwise noted. Output On-Resistance vs. Supply Voltage 70 On-Resistance vs. Temperature 90 69 80 Switch-ON Resistance (m) 68 ON Resistance (m) 67 70 66 60 65 64 2 3 4 5 6 7 Supply Voltage (V) 50 -60 -40 -20 0 20 40 60 80 100 120 Temperature (C) Output On-Resistance vs. Supply Voltage UVLO Threshold Voltage vs. Temperature 2.8 Output On-Resistance vs. Temperature ON-State Supply Current vs. Supply Voltage 100 2.7 90 2.6 Switch-ON Supply Current (A) 100 120 Rising UVLO Threshold Voltage (V) 80 2.5 70 2.4 Falling 2.3 60 2.2 50 -40 -20 0 20 40 60 80 2 3 4 5 Supply Voltage (V) 6 7 8 Temperature (C) UVLO Threshold Voltage vs. Temperature ON-State Supply Current vs. Supply Voltage 100 On-state Supply Current vs. Supply Voltage OFF State Supply Current vs. Supply Voltage 0.10 90 0.08 Switch-ON Supply Current (A) 80 Supply Current (A) 2 3 4 5 Supply Voltage (V) 6 7 8 0.06 70 0.04 60 0.02 50 0.00 3 4 5 6 7 8 Supply Voltage (V) On-state Supply Current vs. Temperature Date: 5/3/06 Rev I Off-state Supply Current vs. Supply Voltage SP2525A USB High-Side Power Switch (c) Copyright 2006 Sipex Corporation 5 TYPICAL PERFORMANCE CHARACTERISTICS VIN = +5.0V, TAMB = +25OC unless otherwise noted. CTL Threshold Voltage vs. Supply Voltage Current Limit Threshold vs. Temperature 2.80 1.15 2.60 1.10 2.40 1.05 2.20 Threshold Voltage (V) Output Threshold (A) 2.00 1.00 CTL Rising 1.80 1.60 0.95 0.90 1.40 CTL Falling 0.85 1.20 0.80 1.00 0.80 0.75 2 3 4 5 6 7 -60 -40 -20 0 20 40 60 80 100 120 140 Supply Voltage (V) Temperature (C) Control Threshold vs. Supply Voltage Output Rise Time vs. Temperature Current Limit Threshold vs. Temperature Output Fall Time vs. Temperature 1.40 0.54 1.35 0.52 Turn-ON Resistance (mS) 1.30 0.50 Turn-off Fall Time (S) -20 0 20 40 60 80 100 120 0.48 1.25 0.46 1.20 0.44 1.15 0.42 1.10 0.40 1.05 0.38 -40 -40 -20 0 20 40 60 80 100 120 Temperature (C) Temperature (C) Output Rise Time vs. Temperature Output Fall Time vs. Temperature V IN V OUT VEN=GND R L=35 C L=15uF RL=35 CL=15uF V EN V FLG V FLG I OUT 200mA/div V OUT I OUT 100mA/div Input Voltage Response Date: 5/3/06 Rev I SP2525A USB High-Side Power Switch Turn-On, Turn-Off Characteristics (c) Copyright 2006 Sipex Corporation 6 TYPICAL PERFORMANCE CHARACTERISTICS VIN = +5.0V, TAMB = +25OC unless otherwise noted. V EN V FLG RL=35 CL=33uF R L=35 C L=150uF V EN V FLG V OUT I OUT 100mA/div V OUT I OUT 100mA/div Turn-On, Turn-Off Characteristics Turn-On, Turn-Off Characteristics V FLG V EN V FLG V OUT V OUT I OUT 5A/div I OUT 1A/div Short Circuit Response (Short Applied to Output) Short Circuit Response (Enable to Short Circuit) VFLG V OUT V FLG VOUT I OUT 5A/div IOUT 1A/div Short Circuit Transient Response (Short Applied to Output) Date: 5/3/06 Rev I Current Limit Response (Ramped Load) SP2525A USB High-Side Power Switch (c) Copyright 2006 Sipex Corporation 7 PACKAGE: 8 Pin NSOIC D D/2 SIDE VIEW 8 7 6 5 E1/2 E1 E/2 E A A1 A2 Seating Plane 1 2 3 4 (L1) Pin1 Designator to be within this INDEX AREA (D/2 x E1/2) e TOP VIEW b FRONT VIEW h Gauge Plane L2 o L h o1 o2 R1 R Seating Plane o1 c 8 Pin NSOIC SYMBOL JEDEC MS-012 Variation AA Dimensions in Inches Conversion Factor: 1 Inch = 25.40 mm Dimensions in Millimeters: Controlling Dimension MIN NOM 6.00 BSC 3.90 BSC 1.27 BSC MAX 1.75 0.25 1.65 0.51 0.25 MIN 0.053 0.004 0.049 0.012 0.007 NOM MAX A A1 A2 b c E E1 e h L L1 L2 R R1 o o1 o2 D 1.35 0.10 1.25 0.31 0.17 1.04 REF 0.25 BSC 0.07 0.07 0 5 0 4.90 BSC SIPEX Pkg Signoff Date/Rev: 0.25 0.40 0.50 1.27 0.010 0.016 8 15 - 0.003 0.003 0 5 0 0.069 0.010 0.065 0.020 0.010 0.236 BSC 0.154 BSC 0.050 BSC 0.020 0.050 0.041 REF 0.010 BSC 8 15 0.193 BSC JL Aug16-05 / Rev A Date: 5/3/06 Rev I SP2525A USB High-Side Power Switch (c) Copyright 2006 Sipex Corporation 8 ORDERING INFORMATION Part Number Temperature Range Package Types SP2525A-1EN ................................................. -40C to +85C ................................................... 8-pin NSOIC SP2525A-1EN/TR ........................................... -40C to +85C .................................................. 8-pin NSOIC SP2525A-2EN ................................................. -40C to +85C ................................................... 8-pin NSOIC SP2525A-2EN/TR ........................................... -40C to +85C .................................................. 8-pin NSOIC Available in lead free packaging. To order add "-L" suffix to part number. Example: SP2525A-1EN/TR = standard; SP2525A-1EN-L/TR = lead free /TR = Tape and Reel Pack quantity is 2,500 for 8 pin NSOIC. Solved by Sipex Sipex Corporation TM Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Date: 5/3/06 Rev I SP2525A USB High-Side Power Switch (c) Copyright 2006 Sipex Corporation 9 |
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