General Description The is an integrated high-side power switch that consists of TTL compatible enables input, a charge pump, and N-Channel MOSFET. The switch s low RDS (ON), 120mΩ, meets USB voltage drop requirements. It includes soft-start to limit inrush current, over-current protection with fold-back, and thermal shutdown to avoid switch failure during hot plug-in. Under voltage lockout (UVLO) function is used to ensure the device remain off unless there is a valid input voltage present. And no reverse current when power off, with shutdown pull-low resistor to discharge the output capacitor when EN is disable. The is available in standard package of SOT-23-5. Features Low MOSFET on Resistance: 120mΩ @ =5.0V Compliant to USB Specifications Operating Voltage Range: 2.7V to 5.5V Low Supply Current: 35μA (Typ.) Low Shutdown Current: <1μA Current Limit with Fold-back: 2A Under-voltage Lockout Soft Start-up Over-current Protection Over Temperature Protection Load Short Protection with Fold-back No Reverse Current when Power off Pass System ESD: IEC61000-4-2 ± 16KV (Air Discharge) and ± 8KV (Contact Discharge) on USB Connector Applications USB Power Management USB Bus/Self Powered Hubs Hot-plug Power Supplies Battery-charger Circuits Notebooks, Motherboard PCs SOT-23-5 Figure 1. Package Type of 1
Pin Configuration K Package (SOT-23-5) Figure 2. Pin Configuration of (Top View) Pin Descriptions Pin No. Name Descriptions 1 VOUT Switch Output Voltage 2 GND Ground 3 EN Chip Enable Control Input, Active High 4, 5 VIN Supply Input Pin 2
Functional Block Diagram EN 3 4, 5 VIN Clock Gate Control Band Gap Reference Over Current Limiting CMP Current Sense 1 VOUT Shutdown Signal UVLO Thermal Sense GND 2 Figure 3. Functional Block Diagram of 3
Ordering Information - Circuit Type G1: Green Package K: SOT-23-5 TR: Tape & Reel Package Temperature Range Part Number Marking ID Packing Type SOT-23-5 -40 to 85 C KTR-G1 G4E Tape & Reel BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and Green. 4
Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit Power Supply Voltage 6.0 V Operating Junction Temperature Range T J 150 ºC Storage Temperature Range T STG -65 to 150 ºC Lead Temperature (Soldering,10 Seconds) T LEAD 260 ºC Thermal Resistance (Junction to Ambient) θ JA 235 ºC/W ESD (Machine Model) 200 V ESD (Human Body Model) 2000 V Note 1: Stresses greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to Absolute Maximum Ratings for extended periods may affect device reliability. Recommended Operating Conditions Parameter Symbol Min Max Unit Supply Voltage 2.7 5.5 V Ambient Operation Temperature Range -40 85 C 5
Electrical Characteristics ( =5.0V, C IN =4.7μF, C OUT =4.7μF, Typical =25 C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Input Voltage Range 2.7 5.5 V Switch On Resistance R DS(ON) =5V, =0.5A 120 140 mω Current Limit I LIMIT =4.0V 1.5 2.0 2.8 A Supply Current I SUPPLY =5V, R LOAD Open 35 65 μa Fold-back Short Current I SHORT =0V 1.5 A Shutdown Supply Current I SHUTDOWN =0V, Shutdown Mode 0.1 1 μa Output Leakage Current I LEAKAGE =0V, =0V 0.1 1 μa Enable High Voltage H Enable Logic High 2.0 6.0 V Enable Low Voltage L Enable Logic Low 0 1.2 V Enable Pin Input Current I EN Force 0V to 5.0V at EN Pin 0 1.0 μa Under Voltage Lockout Threshold Voltage V UVLO Increasing from 0V 2.2 2.5 2.7 V Under Voltage Hysteresis V UVLOHY 0.2 V Reverse Current I REVERSE =0V, > 0.1 1.0 μa Shutdown Pull Low Resistance R DISCHARGE is disable 100 250 Ω Output Turn-on Time Thermal Shutdown Temperature t ON From Enable Active to 90% of Output, R L =10Ω T OTSD 145 1.9 ms o C Thermal Shutdown Hysteresis T HYOTSD 20 Thermal Resistance (Junction to Case) θ JC 70 ºC/W 6
Typical Performance Characteristics Supply Current (μa) 80 75 70 = 65 60 55 50 45 40 35 30 25 20 15 10 =-40 o C =25 o C =85 o C 5 0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 Input Voltage (V) Current Limit (A) 3.0 V 2.8 IN =5V 2.6 2.4 2.2 2.0 1.8 1.6-40 -20 0 20 40 60 80 Temperature ( o C) Figure 4. Supply Current vs. Input Voltage Figure 5. Current Limit vs. Temperature Enable Input Threshold (V) 2.4 =5V 2.1 1.8 1.5 1.2 0.9 0.6 0.3 Rising Falling 0.0-40 -20 0 20 40 60 80 Temperature ( o C) Enable Input Threshold (V) 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 Input Voltage (V) =25 o C Rising Falling Figure 6. Enable Input Threshold vs. Temperature Figure 7. Enable Input Threshold vs. Input Voltage 7
Typical Performance Characteristics (Continued) 3.0 5 2.8 2.6 4 UVLO Threshold (V) 2.4 2.2 2.0 1.8 1.6 1.4 Rising Falling Output Voltage (V) 3 2 1 UVLO No Load Rising Falling 1.2 1.0-40 -20 0 20 40 60 80 Temperature ( o C) 0 0 1 2 3 4 5 Input Voltage (V) Figure 8. UVLO Threshold Voltage vs. Temperature Figure 9. UVLO Function Switch-on Resistance (mω) 400 350 300 250 200 150 100 50 =-40 o C =25 o C =85 o C 0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 Input Voltage (V) =1A Switch-on Resistance (mω) 300 280 260 240 220 200 180 160 140 120 100 80 60 =1A =3V =4V =5V -40-20 0 20 40 60 80 Temperature ( o C) Figure 10. Switch-on Resistance vs. Input Voltage Figure 11. Switch-on Resistance vs. Temperature 8
Typical Performance Characteristics (Continued) Output Short to GND Current (A) 2.0 1.8 1.6 1.4 1.2 =25 O C Output Short to GND Current (A) 2.0 1.8 1.6 1.4 1.2 1.0 0.8 =5V =5V 0.6 1.0 3.0 3.5 4.0 4.5 5.0 5.5 Input Voltage (V) -40-20 0 20 40 60 80 Temperature ( O C) Figure 12. Output Short to GND Current vs. Input Voltage Figure 13. Output Short to GND Current vs. Temperature Output Voltage (V) 5 4 3 2 1 0 0.0 0.5 1.0 1.5 2.0 2.5 Output Current (A) =5V =5V =25 O C Time 1ms/div Figure 14. Output Voltage vs. Output Current Figure 15. Switch Turn-on and Rise Time ( =3.3V, C OUT =4.7μF, No Load) 9
Typical Performance Characteristics (Continued) 500mA /div Time 1ms/div Time 1ms/div Figure 16. Switch Turn-on and Rise Time Figure 17. Switch Turn-on and Rise Time ( =5.0V, C OUT =4.7μF, No Load) ( =3.3V, C OUT =4.7μF, R L =10Ω) 500mA /div 500mA /div Time 1ms/div Time 1ms/div Figure 18. Switch Turn-on and Rise Time Figure 19. Switch Turn-on and Rise Time ( =5.0V, C OUT =4.7μF, R L =10Ω) ( =3.3V, C OUT =100μF, R L =10Ω) 10
Typical Performance Characteristics (Continued) 500mA /div Time 1ms/div Time 1ms/div Figure 20. Switch Turn-on and Rise Time Figure 21. Switch Turn-off and Fall Time ( =5.0V, C OUT =100μF, R L =10Ω) ( =3.3V, C OUT =4.7μF, No Load) Time 1ms/div Time 10ms/div Figure 22. Switch Turn-off and Fall Time Figure 23. Switch Turn-off and Fall Time ( =5.0V, C OUT =4.7μF, No Load) ( =3.3V, C OUT =100μF, No Load) 11
Typical Performance Characteristics (Continued) 500mA /div Time 10ms/div Time 500µs/div Figure 24. Switch Turn-off and Fall Time Figure 25. Switch Turn-off and Fall Time ( =5.0V, C OUT =100μF, No Load) ( =3.3V, C OUT =100μF, R L =10Ω) 2V/div 500mA /div 1A/div Time 500µs/div Time 100μs/div Figure 26. Switch Turn-off and Fall Time Figure 27. Resistance Load Inrush Response ( =5.0V, C OUT =100μF, R L =10Ω) (C OUT =4.7μF, R L =1.65Ω) 12
Typical Performance Characteristics (Continued) 2V/div 1A/div 1A/div Time 200μs/div Time 100ms/div Figure 28. Short-circuit Current, Device Enable into Short ( =5.0V, C OUT =4.7μF) Figure 29. Thermal Shutdown Response ( =5.0V, C OUT =4.7μF, R L =1.65Ω) 13
Typical Application Note 2: 4.7μF input capacitor is enough in most application cases. If the PCB trace of power rail to is long, larger input capacitor is necessary. Figure 30. Typical Application 14
Mechanical Dimensions SOT-23-5 Unit: mm(inch) 2.820(0.111) 3.100(0.122) 0.100(0.004) 0.200(0.008) 2.650(0.104) 3.000(0.118) 1.500(0.059) 1.700(0.067) 0.300(0.012) 0.600(0.024) 0.200(0.008) 0.700(0.028) REF 0.950(0.037) TYP 1.800(0.071) 2.000(0.079) 0.300(0.012) 0.500(0.020) 0 8 1.450(0.057) MAX 0.000(0.000) 0.150(0.006) 0.900(0.035) 1.300(0.051) 15
Mounting Pad Layout SOT-23-5 E2 G Z E1 Y X Z G X Y E1 E2 Dimensions (mm)/(inch) (mm)/(inch) (mm)/(inch) (mm)/(inch) (mm)/(inch) (mm)/(inch) Value 3.600/0.142 1.600/0.063 0.700/0.028 1.000/0.039 0.950/0.037 1.900/0.075 16
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