Single-Channel Power Distribution Switch prevent switch failure from high-current loads. FEATURES TJ2110 3.0V to 5.5V Operating Range 1.0A Continuous Current 2.2A Accurate Current limiting 1.6A Short Circuit Current 80uA Typical On-State Supply Current 1uA Maximum Standby Supply Current Independent open-drain fault flag pins Thermal Shutdown Protection Under Voltage Lockout(UVLO) TJ2110H : Active High version TJ2110L : Active Low version UL Recognized. UL File No. E347996 SOT23-5L PKG SOP8 PKG APPLICATION USB Peripherals General Purpose Power Switching ACPI Power Distribution Notebook PCs PDAs Hot Plug-in Power Supplies MSOP8 PKG DESCRIPSION The TJ2110X is single-channel High-Side MOSFET switch optimized for general-purpose power distribution requiring circuit protection. The TJ2110 series support the following USB requirements. The TJ2110 series supply up to 1.0A as required by USB downstream devices. Switch’s low on-resistance meets USB voltage drop requirement. Fault current is limited to typically 2.2A. Flag output indicate fault condition to the local USB controller. Soft-start prevents the transient voltage drop on the upstream port that can occur when the switch is enabled in bus-powered applications. Under voltage lockout (UVLO) feature disables the output switches until a valid input voltage. Also the TJ2110 include thermal shutdown to Jun. 2012 – R1.3 ORDERING INFORMATION Device Package TJ2110HGSF5 SOT23-5L TJ2110LGSF5 TJ2110HGD SOP8 TJ2110LGD TJ2110HGMD MSOP8 TJ2110LGMD -1- HTC Single-Channel Power Distribution Switch Absolute Maximum Ratings TJ2110 (Note 1) Characteristic Symbol Min Max Unit VIN -0.3 6.0 V VEN -0.3 6.0 V Fault Flag Voltage VFLG - 6.0 V Fault Flag Current IFLAG - 25 mA Output Voltage VOUT 6.0 V Output Current IOUT Internally Limited Storage Temperature Range TSTG -65 150 Symbol Min Max Unit Supply Voltage VIN 3.0 5.5 V Ambient Temperature Range TA -40 +85 o C Operating Junction Temperature Range TJ -40 125 o C Supply Voltage Enable Input Voltage Operating Ratings (Note 2) SOP8 (Note 5) Thermal Resistance Junction-to-Case C (Note 3)(Note 4) Characteristic Thermal Resistance Junction-to-Ambient o 125 θJA MSOP8(Note 6) 166 SOT-23-5L (Note 7) 250 SOP8 (Note 5) 33 θJC MSOP8(Note 6) SOT-23-5L (Note 7) 44 o C/W o C/W 130 Note: 1. Exceeding the absolute maximum ratings may damage the device. 2. It is recommended for VEN voltage not to exceed VIN voltage. 3. The device is not guaranteed to function outside its operating rating. 4. Devices are ESD sensitive. Handling precautions are recommended. 2 5. Test Condition for SOP8 : Copper Area = 150mm , Board Size = 500 mm X 650mm, 1.6T 2 6. Test Condition for MSOP8 : Copper Area = 150mm , Board Size = 500 mm X 650mm, 1.6T 2 7. Test Condition for SOT-23-5L : Copper Area = 35mm , Board Size = 430 mm X 430mm, 1.6T Jun. 2012 – R1.3 -2- HTC Single-Channel Power Distribution Switch TJ2110 Ordering Information Package Oder No. Description Marking Compliance Status SOT23-5L TJ2110LGSF5 1A, Active Low 2110LG RoHS, Green Contact Us SOP8 TJ2110LGD 1A, Active Low TJ2110LG RoHS, Green Contact Us MSOP8 TJ2110LGMD 1A, Active Low TJ2110LG RoHS, Green Contact Us SOT23-5L TJ2110HGSF5 1A, Active High 2110HG RoHS, Green Contact Us SOP8 TJ2110HGD 1A, Active High TJ2110HG RoHS, Green Contact Us MSOP8 TJ2110HGMD 1A, Active High TJ2110HG RoHS, Green Contact Us TJ 2110 Package Type SF5 D MD : SOT23-5L : SOP8 :MSOP8 Green Mode G : Halogen Free Blank : Pb Free Enable Mode H L : Active – High : Active – Low Root Name Product Code Jun. 2012 – R1.3 -3- HTC Single-Channel Power Distribution Switch TJ2110 TYPICAL APPLICATION CIRCUIT VCONT VCC 3.0V to 5V TJ2110 USB Ports IN 0.1uF OUT 10K USB Control VBUS 0.1uF FLG EN 33uF D+ DGND GND FUNCTION BLOCK DIAGRAM OUT EN Current Limit Flag Logic Gate Control FLG Thermal Shutdown UVLO BIAS IN GND Jun. 2012 – R1.3 -4- HTC Single-Channel Power Distribution Switch TJ2110 PIN CONFIGURATION OUT 1 5 IN GND 2 FLG 3 4 EN SOT-23-5L GND 1 8 NC IN 2 7 OUT OUT IN 3 6 OUT FLG EN 4 5 FLG GND 1 8 NC IN 2 7 OUT IN 3 6 EN 4 5 MSOP-8 SOP-8 PIN DESCRIPTION Pin No. Pin Name Pin Description & Function SOP-8/MSOP-8 SOT23-5L GND 1 2 Ground IN 2,3 5 Supply Input: Output MOSFET drain. Also supplies IC’s internal circuitry. Connect to positive supply. EN 4 4 Enable: Logic-Compatible enable input. (H: active high, L: active low). Do not float. FLG 5 3 Fault Flag: Active-low, open-drain output. Indicates over current, UVLO and Thermal shutdown. OUT 6,7 1 Switch Output: Output MOSFET source. Typically connect to switched side of load. NC 8 N/A Jun. 2012 – R1.3 No internal connection; recommend tie to OUT pins -5- HTC Single-Channel Power Distribution Switch TJ2110 ELECTRICAL CHARACTERISTICS (Under the conditions of VIN=+5V and TA=25℃) PARAMETER Symbol Operating Voltage Range VIN Supply Current ICC CONDITIONS MIN 3.0 Enable on, OUT=Open 80 150 uA 2.0 V 1 uA Enable Input Current IEN VEN = 0V to 5.5V -1 Enable Input Capacitance CEN Output Turn-On Fall Time 120 140 mΩ VIN=3.3V, IOUT=1.0A 140 160 mΩ TDON RL=5Ω each output, CL=1uF 70 us TR RL=5Ω each output, CL=1uF 60 us TDOFF RL=5Ω each output, CL=1uF 5 us TF RL=5Ω each output, CL=1uF 10 us RDS(ON) VENX≤0.8V Current Limit Threshold ILIM Ramped load applied to output Short Circuit Current Limit IOS each output, VOUT=0V Over-Temperature Shutdown Threshold TTS Error Flag Output Resistance RFO Overcurrent Flag Response Delay pF VIN=5V, IOUT=1.0A ILEAK UVLO Threshold 0.01 1 Output leakage Current Error Flag Off Current V uA 0.8 Output Turn-Off Delay 5.5 1 (Note 8) Output Turn-On Rise Time UNITS 0.05 VEN Output Turn-On Delay MAX Enable off ,OUT=Open Enable Input Threshold Voltage Switch Resistance TYP IFOH 0.01 5 uA 1.7 2.2 2.7 A 1.2 1.6 2.0 A Temperature increasing switch 145 o C Temperature decreasing switch 135 o C VIN=5V, IL=10mA 10 25 Ω VIN=3.3V, IL=10mA 15 40 Ω 0.01 10 uA VFLAG=5V VIN = increasing 2.1 2.25 2.6 V VIN = decreasing 1.9 2.05 2.45 V 4 10 15 ms UVLO TDFOV VIN=5V, apply VOUT=0V until FLG low Note: 8. OFF is VEN≤0.8V and ON is VEN≥2.0V for the TJ2110H. OFF is VEN≥2.0V and ON is VEN≤0.8V for the TJ2110L. Jun. 2012 – R1.3 -6- HTC Single-Channel Power Distribution Switch TJ2110 Test Circuit TJ2110 VCC 3.0V to 5V IN R1 10K OUT C1 0.1u to 1uF VOUT R2 CL FLG EN GND Jun. 2012 – R1.3 -7- HTC Single-Channel Power Distribution Switch TJ2110 TYPICAL PERFORMANCE CHARACTERISTICS ON-Resistance vs. Temperature ON-Resistance vs. Supply Voltage On-Current vs. Temperature On-Current vs. Supply Voltage Enable Threshold vs. Temperature Enable Threshold vs. supply Voltage (TJ2110L) (TJ2110L) Jun. 2012 – R1.3 -8- HTC Single-Channel Power Distribution Switch TJ2110 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Disable Threshold vs. Temperature Disable Threshold vs. supply Voltage (TJ2110L) (TJ2110L) Turn-On Delay Time vs. Temperature Turn-Off Delay Time vs. Supply voltage Rising Time vs. Temperature Falling Time vs. Supply Voltage Jun. 2012 – R1.3 -9- HTC Single-Channel Power Distribution Switch TJ2110 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Current Limit Threshold vs. Temperature Current Limit Threshold vs. Supply Voltage Short Circuit Current vs. Supply Voltage UVLO vs. Temperature Jun. 2012 – R1.3 - 10 - HTC Single-Channel Power Distribution Switch TJ2110 TYPICAL OPERATING CHARACTERISTICS - o VIN=5V, VEN=0V, TA=25 C, unless otherwise noted Turn – ON / Turn-OFF(TJ2110L) Turn – ON(TJ2110L) Turn – OFF(TJ2110L) Inrush Current Response(TJ2110L) Enable Into Short(TJ2110L) Stepped Short(TJ2110L) Jun. 2012 – R1.3 - 11 - HTC Single-Channel Power Distribution Switch TJ2110 TYPICAL OPERATING CHARACTERISTICS (continued) Thermal Shutdown Jun. 2012 – R1.3 UVLO – VIN Rising & Falling - 12 - HTC Single-Channel Power Distribution Switch TJ2110 Function Description Supply Filtering A 0.1uF to 1uF bypass capacitor from IN pin to GND pin is recommended to control power supply transients. Without this bypass capacitor, an output short can cause ringing from supply lead inductance on the input and damage the internal control circuitry. Input or output transients must never exceed the absolute maximum supply voltage (VINmax = 6V) Power Dissipation The device’s junction temperature depends on several factors such as the load, PCB layout, ambient temperature, and package type. Equations that can be used to calculate power dissipation of each channel and junction temperature are found below: 2 PD=RDS(ON) x IOUT Total power dissipation of the device will be the summation of P D for both channels. To relate this to junction temperature, the following equation can be used: TJ=PD x θJA +TA Where: TJ = Junction temperature TA = Ambient temperature θJA= Thermal resistance of the package Enable/Shutdown The EN control pin must be driven to a logic high or logic low for a clearly defined signal input. Floating these control lines may cause unpredictable operation. Fault Flag The FLG signal is open-drained output of N-channel MOSFET, the FLG output is pulled low to signal the following fault conditions: input under voltage, output current limit, and thermal shutdown. Soft-Start Condition The TJ2110 has high impedance when off, which gradually shifts to low impedance as the chip turns on. This prevents an inrush current from causing voltage drops that result from charging a capacitive load and can pull the USB voltage bus below specified levels. This satisfies the USB voltage droop requirements for bus-powered applications. The TJ2110 can provide inrush current limiting for applications with large load capacitances where CL >10uF. Current Sense A sense MOSFET monitors the current supplied to the load. The sense MOSFET measures current more efficiently than conventional resistance methods. When an overload or short circuit is encountered, the current-sense circuitry sends a control signal to the driver. The driver in turn reduces the gate-source voltage and drives the power MOSFET into its saturation region, which switches the output into a constant-current mode and holds the current constant while varying the voltage on the load. Over-Current and Short-Circuit Protection The TJ2110 features an over-current protection circuitry to protect the device against overload conditions. The current limit threshold is preset internally. It protects the output MOSFET switches from damage due to undesirable short circuit conditions of excess inrush current often encountered during hot plug-in. The low limit of the current limit threshold of the TJ2110 allows a minimum current of 1.0A through the Jun. 2012 – R1.3 - 13 - HTC Single-Channel Power Distribution Switch TJ2110 MOSFET switches. A current limit condition will signal the error flag. These features can protect the load system effectively at any accidental circumstances. Thermal Shutdown Protection Thermal shutdown limits the TJ2110 junction temperature and protects the device from damage as a result of overheated. Thermal protection turns off when the TJ2110’s junction temperature 145℃ reached, allowing it to cool down until 135℃. The TJ2110 is reactivated when a junction temperature drops to approximately 130℃. It depends on the power dissipation, thermal resistance, and ambient temperature. Under Voltage Lockout Under Voltage Lockout (UVLO) prevents the output MOSFET from turning on until V IN exceeds approximately 2.3V. After the switch turns on, if the voltage drops below 2.1V typically, UVLO shuts off the output MOSFET. Under voltage detection functions only when the switch is enabled. 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. USB Compliance The TJ2110 is ideal for self-powered and bus powered Universal Serial Bus (USB) applications. A USB port provides a +5.0V bus and ground return line in addition to a twisted pair for data. The TJ2110 will comply with the following USB requirements: 1) The fault current is well below the UL 25VA safety requirements. 2) The Flag Outputs are available to indicate fault conditions to USB controllers. 3) The MOSFET switches' low on-resistance meets USB voltage drop requirements. 4) The MOSFET switch channel can supply 1.0A as required by USB downstream devices. 5) Soft start eliminates any momentary voltage drops on the upstream port that may occur when the Switches are enabled in bus-powered applications. 6) An Under-voltage Lockout ensures that the device remains off unless there is a valid input supply voltage present. 7) +3.0V and +5.0V logic compatible enable inputs. 8) Thermal Shutdown prevents the possibility of catastrophic switch failure from high-current loads. 8) The device is available in both active-high and active-low versions. Jun. 2012 – R1.3 - 14 - HTC