SP2525A-1EN-L/TR

SP2525A Single Channel USB Power Distribution Switch January 2020 Rev. 2.1.1 GENERAL DESCRIPTION APPLICATIONS • Self Powered USB 2.0 and 3.0 Hubs The SP2525A device is an integrated high-side power switch ideal for self-powered and buspowered Universal Serial Bus (USB) applications. • USB Compliant VBUS Power Distribution • Audio-Video Equipments • Generic Power Switching The high-side switches are MOSFETs with 70mΩ 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 under voltage 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. 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 • 100mΩ Maximum On-Resistance • 75μA On-State Supply Current • 1μA Shutdown Current The SP2525A is offered in a RoHS compliant “green”/halogen free 8-pin NSOIC package. • Output can be Forced Higher than Input (Off-State) • Thermal Shutdown • Slow Turn On and Fast Turn Off • Active-high Version: SP2525A-1 • Active-low Version: SP2525A-2 • RoHS Compliant, Green/Halogen Free 8-Pin NSOIC Package TYPICAL APPLICATION DIAGRAM Fig. 1: SP2525A Application Diagram – Single Port Self Powered Hub 1/10 SP2525A Single Channel USB Power Distribution Switch ABSOLUTE MAXIMUM RATINGS OPERATING 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. Ambient Temperature Range ..................... -40°C to 85°C Supply Voltage VIN ................................................. 7.0V Fault Flag Voltage VFLG ........................................... 7.0V Fault Flag Current IFLG ........................................... 50mA Enable Input VEN ......................................... -0.3V to 15V Storage Temperature .............................. -65°C to 150°C Power Dissipation (NSOIC-8) ......................................... (derate 6.14mW/°C above 70°C)...................... 500mW ELECTRICAL SPECIFICATIONS Specifications with standard type are for an Operating Ambient Temperature of TA = 25°C only; limits applying over the full Operating Junction Temperature range are denoted by a “•”. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TA = 25°C, and are provided for reference purposes only. Unless otherwise indicated, VIN = 5.0V, TA= 25°C. Parameter Min. Supply Current Enable Input Voltage 0.8 Enable Input Current Enable Input Capacitance Typ. Max. 0.75 5.0 75 100 1.7 2.0 2.4 0.01 1 0.01 1 1 Output MOSFET Resistance 70 Units µA V µA Conditions VEN = Logic “0” OUT =open VEN = Logic “1” OUT =open VEN = Logic “0” VEN = Logic “1” VEN = Logic “0” VEN = Logic “1” pF 100 mΩ µs RL=10Ω, each output 1000 4000 µs RL=10Ω, each output Output turn-off delay 0.8 20 µs RL=10Ω, each output Output turn-off fall time 0.7 20 µs RL=10Ω, each output 10 µA 100 Output turn-on delay Output turn-on rise time Output Leakage Current Current limit threshold Over temperature shutdown threshold Error Flag Output Resistance Error Flag Current UVLO threshold 0.6 1.0 1.25 135 A °C 125 Temperature TJ raising Temperature TJ decreasing 10 25 15 40 0.01 1 2.6 Ω 2/10 VIN=3.3V, IL=10mA µA V 2.4 VIN=5V, IL=10mA VIN increasing VIN decreasing Rev. 2.1.1 SP2525A Single Channel USB Power Distribution Switch BLOCK DIAGRAM Fig. 2: SP2525A Block Diagram PIN ASSIGNMENT Fig. 3: SP2525A Pin Assignment PIN DESCRIPTION Name Pin Number EN 1 Description Enable Input Active High for SP2525A-1 and Active Low for SP2525A-2 FLG 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 under voltage GND 3 Chip Power Ground NC 4 Not Internally Connected IN 5, 7 Power Supply Input OUT 6, 8 MOSFET Switch Output 3/10 Rev. 2.1.1 SP2525A Single Channel USB Power Distribution Switch ORDERING INFORMATION(1) Part Number SP2525A-1EN-L/TR SP2525A-2EN-L/TR Temperature Range Package Packing Method Lead-Free(2) -40°C ≤ TA ≤ +85°C NSOIC8 Tape & Reel Yes Enable Active High NSOIC8 Tape & Reel Yes Enable Active Low -40°C ≤ TA ≤ +85°C Note 1 Notes: 1. Refer to www.maxlinear.com/SP2525A for most up-to-date Ordering Information. 2. Visit www.maxlinear.com for additional information on Environmental Rating. 4/10 Rev. 2.1.1 SP2525A Single Channel USB Power Distribution Switch TYPICAL PERFORMANCE CHARACTERISTICS All data taken at VIN = 5.0V, TA = 25°C, unless otherwise specified - Schematic and BOM from Application Information section of this datasheet. Fig. 4: Output On-Resistance vs Supply Voltage Fig. 5: Output On-Resistance vs Temperature Fig. 6: UVLO Threshold vs Temperature Fig. 7: On-state Supply Current vs Supply Voltage Fig. 8: On-state Supply Current vs Temperature Fig. 9: Off-state Supply Current vs Supply Voltage 5/10 Rev. 2.1.1 SP2525A Single Channel USB Power Distribution Switch Fig. 10: CTL Threshold vs Supply Voltage Fig. 11: Current Limit Threshold vs Temperature Fig. 12: Output Rise Time vs Temperature Fig. 13: Output Fall Time vs Temperature Fig. 14: Input Voltage Response Fig. 15: Turn-On, Turn-Off Characteristics 6/10 Rev. 2.1.1 SP2525A Single Channel USB Power Distribution Switch Fig. 16: Turn-On, Turn-Off Characteristics Fig. 17: Turn-On, Turn-Off Characteristics Fig. 18: Short Circuit Response (Short applied to Output) Fig. 19: Short Circuit Response (Enable to Short Circuit) Fig. 20: Short Circuit Transient Response (Short applied to Output) Fig. 21: Current Limit Response (Ramped Load) 7/10 Rev. 2.1.1 SP2525A Single Channel USB Power Distribution Switch APPLICATION INFORMATION SHORT CIRCUIT TRANSIENT 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. Bulk capacitance provides the short-term transient current needed during a hotattachment event. A 33μF/16V tantalum or a 100μF/ 10V electrolytic capacitor mounted close to the downstream connector at each port should provide sufficient transient drop protection. CURRENT LIMIT PRINTED CIRCUIT LAYOUT 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. The Power circuitry of USB printed circuit boards requires a customized layout to maximize thermal dissipation and to minimize voltage drop and EMI. ERROR FLAG 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. THERMAL SHUTDOWN When the temperature of the SP2525A exceeds 135ºC for any reasons, the thermal shutdown function turns off the MOSFET switch and signals the Error Flag. A hysteresis of 10ºC prevents the MOSFETs from turning back on until the chip temperature drops below 125ºC. SUPPLY FILTERING A 0.1μF to 1μF 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. TEST CIRCUIT 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 hotattachment by filtering high-frequency signals. 8/10 Rev. 2.1.1 SP2525A Single Channel USB Power Distribution Switch PACKAGE SPECIFICATION 8-PIN NSOIC 9/10 Rev. 2.1.1 SP2525A Single Channel USB Power Distribution Switch REVISION HISTORY Revision Date Description 2.0.0 11/10/2010 Reformat of datasheet 2.1.0 11/04/2011 Updated package specification 2.1.1 1/22/2020 Updated to MaxLinear logo. Updated Ordering Information. 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