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| (R) Advanced SP2526A Dual USB High-Side Power Switch FEATURES +3.0V to +5.5V Input Voltage Range Two Independent Power Switches Two Error Flag Outputs, Open Drain 2.6V Undervoltage Lockout 1.25A Short Circuit Current Limit 150m Maximum On-Resistance 110A On-State Supply Current 1A Shutdown Current Output Can Be Forced Higher Than Input (Off-State) Thermal Shutdown 1ms Soft-Start Power Up, Fast Turn Off ENA 1 8 OUTA FLGA 2 FLGB ENB 3 4 SP2526A 8 Pin NSIOC 7 IN 6 GND 5 OUTB Now Available in Lead Free Packaging Active-High Version: SP2526A-1 Active-Low Version: SP2526A-2 APPLICATIONS USB Power Management Hot Plug-In Power Supplies Battery Charger Circuit DESCRIPTION The SP2526A device is a dual +3.0V to +5.5V USB Supervisory Power Control Switch ideal for self-powered and bus-powered Universal Serial Bus (USB) applications. Each switch has low on-resistance (110m typical) and can supply 500mA minimum. The fault currents are limited to 1.0A typical and the flag output pin for each switch is available to indicate fault conditions to the USB controller. The thermal shutdown feature will prevent damage to the device when subjected to excessive current loads. The undervoltage lockout feature will ensure that the device will remain off unless there is a valid input voltage present. TYPICAL APPLICATION CIRCUIT VCC 5.0V + +33F 10K 4.50V TO 5.25V UPSTREAM VBUS 100mA MAX 10K USB CONTROLLER SPX1521 IN OUT SP2526A ENA FLGA FLGB OUTA IN 0.1F GND Ferrite Bead VBUS D+ 0.01 F DGND Ferrite Bead DATA VBUS D+ D+ 1F Cin GND DATA ON/OFF VIN OVERCURRENT GND + + 10F Cout 33F OVERCURRENT * OUTB ON GND ENB VBUS * 33F, 16V Tantalum, or 100F, 10V Electrolytic Bold line indicate high-current traces Ferrite Bead D+ 0.01 F D- + * 33F GND Ferrite Bead DATA Two Port Self Powered Hub Date: 12/06/04 SP2526A Dual USB High-Side Power Switch (c) Copyright 2004 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. Operating Temperature Range.............-40C to +85C Supply Voltage(VIN)..........................................7.0V Junction Temperature Range..............................125C Fault Flag Voltage (VFLG)..................................7.0V Storage Temperature Range..............-65C to +150C Fault Flag Current (IFLG)..................................50mA Lead Temperature (10 sec. soldering)................260C Enable Control Input (VEN).....................-0.3V -15V 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 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 1.0 135 125 10 15 0.01 2.6 2.4 25 40 1 MIN. TYP. 0.75 110 1.7 2.0 0.01 0.01 1 110 100 1000 0.8 0. 7 4000 20 20 10 1.25 150 MAX. 5.0 160 0.8 1 1 UNITS A V A pF m s s s s A A O CONDITIONS VEN = Logic "0" OUT = Open VEN = Logic "1" OUT = Open VEN = Logic "0" VEN = Logic "1" VEN = Logic "0" VEN = Logic "1" RL=10 each output RL=10 each output RL=10 each output RL=10 each output C TJ increasing TJ decreasing VIN = 5V,IL = 10mA VIN = 3.3V,IL = 10mA VFLAG = 5V VIN increasing VIN decreasing A V Date: 12/06/04 SP2526A Dual USB High-Side Power Switch (c) Copyright 2004 Sipex Corporation 2 PIN DESCRIPTION Pin Number 1 2 Pin Name ENA FLGA Description Enable Input for MOSFET Switch A. This input pin is active high for the SP2526A-1 and active low for the SP2526A-2 An active-low and open-drained fault flag output fot channel A. It can indicate current limit when ENA is active. In normal mode operation (ENA or/and ENB is active), it also can indicate thermal shudown or undervoltage. An active-low and open-drained fault flag output fot channel B. It can indicate current limit when ENB is active. In normal mode operation (ENA or/and ENB is active), it also can indicate thermal shudown or undervoltage. Enable Input for MOSFET Switch B. This input pin is active high for the SP2526A-1 and active low for the SP2526A-2 Output for MOSFET Switch Channel B. This is the output pin of the MOSFET source of channel B, typically connected to the switched side of the load. Ground. Power supply input Output for MOSFET Switch Channel A. This is the output pin of the MOSFET source of channel A, typically connected to the switched side of the load. 3 FLGB 4 5 6 7 8 ENB OUTB GND IN OUTA TEST CIRCUIT 10K R1 10K R2 VCC +5V SP2526A ON OFF FLGA IN ENA OUTA 10 R4 0.1F C1 FLGB ON OFF ENB GND 10 OUTB R4 Date: 12/06/04 SP2526A Dual USB High-Side Power Switch (c) Copyright 2004 Sipex Corporation 3 APPLICATION INFORMATION Error Flag 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 SP2526A allows a minimum current of 0.6A through the MOSFET switches. A current limit condition will signal the error flag. Thermal Shutdown When the chip temperature exceeds 135C for any reason other than overcurrent fault of either one of the two MOSFETs, the thermal shutdown function turns off both MOSFET switches and signals the error flag. A hysteresis of 10C prevents the MOSFETs from turning back on until the chip temperature drops below 125C. However, if thermal shutdown is triggered by chip temperature rise resulting from overcurrent fault condition of either one of the MOSFET switches, the thermal shutdown function will only turn off the switch that is in overcurrent condition and the other switch can still remain its normal operation. In other words, the thermal shutdown function of the two switches is independent of each other in the case of overcurrent fault. 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 sufficient ringing on the input (from supply lead inductance) to damage internal control circuitry. Transient Requirements USB supports dynamic attachment (hot plug-in) of peripherals. A current surge is caused by the input capacitance of 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 hotattachment 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 downstream connector each port should provide 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. Date: 12/06/04 SP2526A Dual USB High-Side Power Switch (c) Copyright 2004 Sipex Corporation 4 BLOCK DIAGRAM OUTA FLGA Driver ENA Charge Pump Thermal Shutdown Charge Pump Current Limit CS Power N-MOSFET UVLO IN Current Limit CS ENB FLGB Driver OUTB Date: 12/06/04 SP2526A Dual USB High-Side Power Switch (c) Copyright 2004 Sipex Corporation 5 Power N-MOSFET TYPICAL PERFORMANCE CHARACTERISTICS VIN = +5.0V, single MOSFET switch section, and TAMB = +25OC unless otherwise noted. 118 140 116 130 114 Output-On-Resistance (millohms) 120 On-Resistance (millohms) 110 112 110 RL = 47 TA = 25C 100 RL = 47 TA = 25C 90 108 80 106 70 104 2.5 3 3.5 4 4.5 5 5.5 6 Supply Voltage (V) 60 -40 -20 0 20 40 60 80 100 Temperature (C) Figure 1. Output On-Resistance vs. Supply Voltage Figure 2. Output On-Resistance vs. Temperature 3 160 2.8 140 Rising UVLO Threshold Voltage (V) 2.6 Enable Threshold Voltage (V) 120 Both Switches On 100 2.4 Falling 2.2 80 2 60 -40 -20 0 20 40 60 80 100 3 4 5 6 7 8 Temperature (C) Supply Voltage (V) Figure 3. UVLO Threshold Voltage vs. Temperature Figure 4. On-state Supply Current vs. Supply Voltage Date: 12/06/04 SP2526A Dual USB High-Side Power Switch (c) Copyright 2004 Sipex Corporation 6 TYPICAL PERFORMANCE CHARACTERISTICS VIN = +5.0V, single MOSFET switch section, and TAMB = +25OC unless otherwise noted. 130 0.10 120 Switches Enabled Offstate Supply Current (A) 0.08 Supply Current (A) 110 0.06 Switches Disabled 0.04 100 90 0.02 80 0.00 -40 -20 0 20 40 60 80 100 -40 -20 0 20 40 60 80 100 Temperature (C) Temperature (C) Figure 5. On-state Supply Current vs. Temperature Figure 6. Off-state Supply Current vs. Temperature 0.10 1.7 1.6 0.08 1.5 Enable Voltage Rising 0.06 Offstate Supply Current (A) 1.4 Supply Current (A) 0.04 1.3 Enable Voltage Falling Both Switches Off 0.02 1.2 1.1 0.00 1.0 -40 -20 0 20 40 60 80 100 3 3.5 4 4.5 5 5.5 Temperature (C) Supply Voltage (V) Figure 7. Off-state Supply Current vs. Supply Voltage Figure 8. Control Threshold vs. Supply Voltage Date: 12/06/04 SP2526A Dual USB High-Side Power Switch (c) Copyright 2004 Sipex Corporation 7 TYPICAL PERFORMANCE CHARACTERISTICS VIN = +5.0V, single MOSFET switch section, and TAMB = +25OC unless otherwise noted. Control (V) Output (V) 6 4 2 0 5 3 1 -1 0 0.5 1.0 1.5 2.0 2.5 RL = 47 Time (mS) Figure 9. Turn-on/Turn-off Characteristics Date: 12/06/04 SP2526A Dual USB High-Side Power Switch (c) Copyright 2004 Sipex Corporation 8 PACKAGE: 8 Pin NSOIC D e O E/2 E1/2 E1 L2 E Seating Plane O1 L1 1 L Gauge Plane O b VIEW C INDEX AREA (D/2 X E1/2) TOP VIEW A A1 Seating Plane A2 SIDE VIEW 8 Pin NSOIC JEDEC MO-012 (AA) Variation MIN NOM MAX SYMBOL A 1.35 1.75 A1 0.1 0.25 A2 1.25 1.65 b 0.31 0.51 c 0.17 0.24 4.90 BSC D 6.00 BSC E 3.90 BSC E1 1.27 BSC e L 0.4 1.27 1.04 REF L1 0.25 BSC L2 o 0 8 o1 5 15 Note: Dimensions in (mm) B B SEE VIEW C b c BASE METAL SECTION B-B WITH PLATING Date: 12/06/04 SP2526A Dual USB High-Side Power Switch (c) Copyright 2004 Sipex Corporation 9 ORDERING INFORMATION Part Number Temperature Range Package Types SP2526A-1EN ................................................. -40C to +85C ................................................... 8-pin NSOIC SP2526A-1EN/TR ........................................... -40C to +85C .................................................. 8-pin NSOIC SP2526A-2EN ................................................. -40C to +85C ................................................... 8-pin NSOIC SP2526A-2EN/TR ........................................... -40C to +85C .................................................. 8-pin NSOIC Available in lead free packaging. To order add "-L" suffix to part number. Example: SP2526A-1EN/TR = standard; SP2526A-1EN-L/TR = lead free /TR = Tape and Reel Pack quantity is 2,500 for NSOIC. CLICK HERE TO ORDER SAMPLES Corporation ANALOG EXCELLENCE Sipex Corporation 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: 12/06/04 SP2526A Dual USB High-Side Power Switch (c) Copyright 2004 Sipex Corporation 10 |
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