SEMICONDUCTOR KIC6981F/MF TECHNICAL DATA 1.5A 1-Channel Current Limited Power Switch Description The KIC6981F/MF is integrated power switches optimized for USB and other hot-swap applications. The family of devices complies with USB 2.0 and is available with high polarity of Enable input. They offer current and thermal limiting and short circuit protection as well as controlled rise time and under-voltage lockout functionality. KIC6981F H T G P D L U FEATURES A ・Single USB Port Power Switches with discharge DIM A B1 B2 D G H L P T U ・Operating input voltage range 2.7V to 5.5V ・Up to 1.5A Maximum Load Current 8 5 1 4 ・Internal Short Circuit Current Limiting(2.1A) B1 B2 ・Reverse Current Blocking ・Fault report with blanking time(7ms) ・90mΩ Power MOSFET MILLIMETERS _ 0.2 4.85 + _ 0.2 3.94 + _ 0.3 6.02 + _ 0.1 0.4 + 0.15+0.1/-0.05 _ 0.2 1.63 + _ 0.2 0.65 + 1.27 0.20+0.1/-0.05 Max 0.1 MAXIMUM RATINGS (Ta=25℃) CHARACTERISTIC Input Voltage Output Voltage Thermal Resistance Junction-to-Ambient SYMBOL RATING UNIT VIN 6.5 V VOUT 6.5 V FLP 129 MSOP 132 FLP-8 KIC6981MF ℃/W H T P D Operating Junction Temperature Tj Storage Temperature Tstg L G -40~125 ℃ -55～150 A Note) Device mounted on FR-4 substrate 2Layer PCB. RECOMMENDED OPERATING CONDITIONS B1 CHARACTERISTIC SYMBOL MIN MAX UNIT Input Voltage VIN 2.7 5.5 V Output Current IOUT 0 1.5 A B2 DIM A B1 B2 D G H L P T MILLIMETERS _ 0.1 3.00 + _ 0.1 3.00 + _ 0.2 4.90 + 0.29~0.38 0.05~0.15 1.10 Max 0.4~0.7 0.65 0.15~0.20 MSOP-8 Marking KIC 6981 Device Name C 6981 Lot No. <FLP-8> 2013. 1. 17 <MSOP-8> Revision No : 1 1/8 KIC6981F/MF Functional Block Diagram Reverse Blocking VIN VOUT Discharge Control FLG UVLO Short Circuit Protection Driver EN Current Sense Current Limit GND Deglitch Thermal Protection Pin Descriptions Pin Name Pin Number Descriptions GND 1 IN 2, 3 EN 4 Enable input, active high FLG 5 Over-current and over-temperature fault report OUT 6, 7 NC 8 Ground Voltage input pin Voltage output pin No internal connection ; recommend tie to OUT pins Typical Application Circuit IN Power Supply 2.7V to 5.5V Load OUT + + 10k 10㎌ 0.1㎌ 0.1㎌ 120㎌ FLG ON EN GND OFF 2013. 1. 17 Revision No : 1 2/8 KIC6981F/MF ELECTRICAL CHARACTERISTICS (VIN=5V, TA=25℃, Unless otherwise stated) CHARACTERISTIC Symbol Test Conditions Input UVLO Min Typ Max Units 2.0 2.2 2.4 V 50 100 150 mV VUVLO Hysteresis Input Shutdown Current ISHDN Disabled, IOUT = 0 0.2 0.5 1 ㎂ Input Quiescent Current IQ Enabled, IOUT = 0 20 45 70 ㎂ Input Leakage Current ILEAK Disabled, OUT grounded - 0.1 1 ㎂ Reverse Leakage Current IREV Disabled, VIN = 0V, VOUT = 5V, IREV at VIN - 0.1 1 ㎂ 70 90 115 mΩ - - 140 mΩ 1.6 2.1 2.6 A VIN= 5V, IOUT = 1.5A, TA=25℃ Switch on-resistance RDS(ON) VIN= 5V, IOUT = 1.5A, -40℃≤TA≤85℃ Short-Circuit Current Limit ILIMIT VIN= 5V, VOUT = 4V, CL=120㎌, -40℃≺TA≺85℃ Current limiting trigger threshold ITrig Output Current Slew rate(<100A/s), CL=120㎌ - 2.6 - A EN Input Logic Low Voltagve VIL VIN= 2.7V to 5.5V - - 0.8 V EN Input Logic High Voltagve VIH VIN= 2.7V to 5.5V 2 - - V EN Input leakage ISINK VEN=5V - - 1 ㎂ Output turn-on delay time TD(on) CL=1㎌, Rload=10Ω - 0.05 0.1 ms Output turn-off delay time TD(off) CL=1㎌, Rload=10Ω - 0.05 0.1 ms Output turn-on rise time TR CL=1㎌, Rload=10Ω - 0.6 1.5 ms Output turn-on fall time TF CL=1㎌, Rload=10Ω - 0.2 0.4 ms Discharge time TDIS CL=120㎌, Rload=10Ω disabled to VOUT < 0.5V 1 3 6 ms FLG blanking time TBlank CIN = 10㎌, CL = 22㎌ 4 7 15 ms Thermal Shutdown Threshold TSHDN Enabled, Rload = 1㏀ 130 150 170 ℃ Thermal Shutdown Hysteresis THYS Disabled, OUT grounded - 25 - ℃ 2013. 1. 17 Revision No : 1 3/8 KIC6981F/MF EN lTrig=2.6A llimit=2.1A Iout 7ms 7ms 7ms Inormal=1A Vflg [Figure 1. Over Current Protection on Power Switch] EN Vout Output Short Output Short llimit=2.1A Iout 7ms 7ms Inormal=1A 7ms Vflg [Figure 2. Short Circuit Protection on Power Switch] VEN 50% VEN 50% 50% TD(OFF) TR TD(ON) 50% TD(OFF) TR TF 90% TF TD(OFF) 90% VOUT 90% 90% VOUT 10% 10% 10% 10% [Figure 3. delay Time] 2013. 1. 17 Revision No : 1 4/8 KIC6981F/MF [Over Load] [Short Circuit] 200ms/div 200ms/div ※ FLG Response Condition 2013. 1. 17 CONDITION FLG Over - Load VIN - VOUT ≻1.0V Active L Short Circuit VOUT = 0 Active L Revision No : 1 Remark 5/8 KIC6981F/MF Typical Performance Characteristics (Continued) Supply Current, Output Disabled vs Ambient Temerature Supply Current, Output Disabled (uA) Supply Current, Output Enabled (uA) Supply Current, Output Enabled vs Ambient Temerature 47 42 37 Vin=3.3V Vin=5.0V 32 Vin=2.7V 27 22 -60 -40 -20 0 20 40 60 80 100 0.9 0.8 0.7 0.6 Vin=5.0V 0.5 0.4 0.3 0.2 Vin=3.3V 0 -60 -40 Ambient Temperature ( ) Static Drain-Source On-State Resistance (m Ω) Short-Circuit Output Current (A) 2.25 Vin=3.3V 2.20 Vin=2.7V 2.15 2.10 2.05 Vin=5.0V -40 -20 0 20 40 60 0 20 40 60 80 100 Static Drain-Source On-State Resistance vs Ambient Temerature CL=120uF 2.00 -60 -20 Ambient Temperature ( ) Short-Circuit Output Current vs Ambient Temerature 2.30 Vin=2.7V 0.1 80 100 180 170 160 150 140 130 120 110 100 90 80 70 60 50 -60 Vin=3.3V Vin=2.7V Vin=5V -40 -20 0 20 40 60 80 100 Ambient Temperature ( ) Ambient Temperature ( ) Undervoltage Lockout vs Ambient Temperature Undervoltage Lockout (V) 2.30 2.25 UVLO Rising 2.20 2.15 2.10 2.05 2.00 UVLO Falling 1.95 1.90 -60 -40 -20 0 20 40 60 80 100 Ambient Temperature ( ) 2013. 1. 17 Revision No : 1 6/8 KIC6981F/MF Functional Description 1. Over-current and Short Circuit Protection An internal sensing FET is employed to check for over-current conditions. Unlike current-sense resistors, sense FETs do not increase the series resistance of the current path. When an over-current condition is detected, the device maintains a constant output current and reduces the output voltage accordingly. Complete shutdown occurs only if the fault stays long enough to activate thermal limiting. 2. Thermal Protection Thermal protection prevents the IC from damage when the die temperature exceeds safe margins. This mainly occurs when heavy-overload or short-circuit faults are present for extended periods of time. The KIC6981F/MF implements a thermal sensing to monitor the operating junction temperature of the power distribution switch. Once the die temperature rises to approximately 150°C, the Thermal protection feature gets activated as follows: The internal thermal sense circuitry turns the power switch off and the FLG output is asserted thus preventing the power switch from damage. Hysteresis in the thermal sense circuit allows the device to cool down to approximately 25°C before the output is turned back on. This built-in thermal hysteresis feature is an excellent feature, as it avoids undesirable oscillations of the thermal protection circuit. The switch continues to cycle in this manner until the load fault is removed, resulting in a pulsed output. The FLG open-drain output is asserted when an over-current occurs with 7-ms deglitch. 3. Under-Voltage Lockout (UVLO) Under-voltage lockout function (UVLO) guarantees that the internal power switch is initially off during start-up. The UVLO functions only when the switch is enabled. Even if the switch is enabled, the switch is not turned ON until the power supply has reached at least 2.2V. Whenever the input voltage falls below approximately 2.2V, the power switch is turned off. This facilitates the design of hot-insertion systems where it is not possible to turn off the power switch before input power is removed. 4. Reverse Current Protection In a normal MOSFET switch, current can flow in reverse direction (from the output side to the input side) when the output side voltage is higher than the input side, even when the switch is turned off. A reverse-current blocking feature is implemented in the KIC6981F/MF to prevent such back currents. This circuit is activated by the difference between the output voltage and the input voltage. When the switch is disabled, this feature blocks reverse current flow from the output back to the input. 5. Discharge Function When enable is de-asserted, the discharge function is active. The output capacitor is discharged through an internal NMOS that has a discharge resistance of 100Ω. Hence, the output voltage drops down to zero. The time taken for discharge is dependent on the RC time constant of the resistance and the output capacitor. 6. FLG Response The FLG open-drain output goes active low for any of the two conditions: Over-Current or Over-Temperature. The time from when a fault condition is encountered to when the FLG output goes low is 7-ms (TYP). The FLG output remains low until both over-current and over-temperature conditions are removed. Connecting a heavy capacitive load to the output of the device can cause a momentary Over-current condition, which does not trigger the FLG due to the 7-ms deglitch timeout. The KIC6981F/MF is designed to eliminate erroneous Over-current reporting without the need for external components, such as an RC delay network. 2013. 1. 17 Revision No : 1 7/8 KIC6981F/MF Applications Information 1. Supply Filtering A 0.01uF to 0.1μF bypass capacitor from IN to GND, located near the KIC6981F/MF, 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. Input transients must not exceed the absolute maximum supply voltage (VIN max = 6.5V) even for a short duration. 2.EN, the Enable Input EN must be driven logic high for a clearly defined input. Floating the input may cause unpredictable operation. EN should not be allowed to go negative with respect to GND. 2013. 1. 17 Revision No : 1 8/8