R5523N_E/2006/05/12 USB HIGH-SIDE POWER SWITCH R5523N SERIES DESCRIPTION The R5523N is CMOS-based high-side MOSFET switch IC for Universal Serial Bus (USB) applications. Low ON Resistance (Typ. 130mΩ) and low supply current (Typ. 20µA at active mode) are realized in this IC. An over-current limit circuit, a thermal shutdown circuit, and an under voltage lockout circuit are built-in as protection circuits. Further, a delay circuit for flag signal after detecting over-current, is embedded to prevent miss-operation of error flag because of inrush current. The R5523N is ideal for applications of protection for USB power supply. Since the package is small SOT23-5, high density mounting on board is possible. FEATURES • Built-in 130 mΩ (Typ.) P-channel MOSFET Switch • Low Supply Current Typ. 20µA (at Active Mode) • Output Current Min. 500mA/ Min. 250mA 2 types are available. • Flag Delay Time Typ. 10ms. • Over- Current Limit / Short Circuit Protection • Under Voltage Lockout • Thermal Shutdown Protection • Soft-start Function • SOT23-5 pin Package APPLICATIONS • USB Peripherals • Notebook PCs 1 R5523N BLOCK DIAGRAM IN OUT GATE CONTROL EN CURRENT LIMIT FLAG DELAY FLG UVLO THERMAL SHUTDOWN GND SELECTION GUIDE In the R5523N Series, output current and the logic of the enable pin can be designated. Part Number is designated as follows: R5523Nxxxx-TR ← Part Number ↑↑ ↑ abc Code Description Designation of the output current. a 001: 500mA 002: 250mA (Under development) Designation of the logic of the enable pin. b A: active with "L" B: active with "H" c 2 Designation of the taping type. TR (Refer to the taping specifications.) R5523N PIN CONFIGURATION SOT23-5 4 5 1 2 3 ABSOLUTE MAXIMUM RATINGS Topt=25°C Symbol VIN VEN Item Input Voltage Enable Pin Input Voltage Ratings Unit 6.5 V -0.3 ~ VIN+0.3 V VFLG Flag Voltage -0.3 ~ 6.5 V IFLG Flag Current 14 mA VOUT Output Voltage -0.3 ~ VIN+0.3 V IOUT Output Current Internal Limited PD Power Dissipation Internal Limited Topt Operating Temperature Tstg Storage Temperature -40 ~ +85 °C -55 ~ +125 °C ABSOLUTE MAXIMUM RATINGS Absolute Maximum ratings are threshold limit values that must not be exceeded ever for an instant under any conditions. Moreover, such values for any two items must not be reached simultaneously. Operation above these absolute maximum ratings may cause degradation or permanent damage to the device. These are stress ratings only and do not necessarily imply functional operation below these limits. 3 R5523N PIN DESCRIPTION Pin No. Symbol description 1 EN Enable Pin 2 GND Ground Pin 3 FLG FLG pin (Open Drain Output) 4 VIN 5 VOUT Power Supply Pin Output pin ELECTRICAL CHARACTERISTICS • R5523N001A/B Symbol Item Conditions Min. Typ. Max. Unit 5.5 V VIN Input Voltage IDD1 Supply Current 1 *Note1 VOUT = open (Note1) 20 45 µA IDD2 Supply Current 2 *Note2 OUT = open, (Note2) 0.1 1.0 µA RON Switch On Resistance VIN = 5V, IOUT=500mA 130 180 mΩ tON Output Turn-on Delay VIN = 5V, RL=60Ω 400 µs tOFF Output Turn-off Delay VIN = 5V, RL=60Ω 5 µs VUVLO UVLO Threshold VIN = increasing 1.9 V VHYS UVLO Hysteresis Range VIN = decreasing 0.1 V ITH Current Limit Threshold ILIM Short Current Limit VOUT=0V tFD Over Current Flag Delay From Over Current to FLG = "L" Thermal Shutdown Tj =increasing 135 Temperature Threshold Tj =decreasing 120 TTS IEN 2.2 1.6 1.0 1.5 A 0.50 0.75 1.30 A 5 10 20 ms Enable Pin Input Current 0.01 VEN1 Enable Pin Input Voltage 1 VEN = increasing VEN2 Enable Pin Input Voltage 2 VEN = decreasing ILO Output Leakage Current VLF Flag "L" Output Voltage IFOF 4 Topt=25°C Flag Off Current 1.00 µA V 2.0 0.1 ISINK = 1mA VFLAG = 5.5V °C 0.01 0.8 V 1.0 µA 0.4 V 1.00 µA R5523N • R5523N002A/B Symbol Topt=25°C Item Conditions Min. Typ. Unit 5.5 V VIN Input Voltage IDD1 Supply Current 1 *Note1 VOUT = open (Note1) 20 45 µA IDD2 Supply Current 2 *Note2 OUT = open, (Note2) 0.1 1.0 µA RON Switch On Resistance VIN = 5V, IOUT=500mA 130 180 mΩ tON Output Turn-on Delay RL=60Ω 400 µs 1.9 V 1.8 V VUVLO UVLO Threshold 2.2 Max. VIN = increasing 1.6 VIN = decreasing ITH Current Limit Threshold ILIM Short Current Limit VOUT=0V tFD Over Current Flag Delay From Over Current to FLG = "L" Thermal Shutdown Tj =increasing 135 Temperature Threshold Tj =decreasing 120 TTS IEN 0.75 A 0.25 0.35 0.50 A 5 10 20 ms Enable Pin Input Current 0.01 VEN1 Enable Pin Input Voltage 1 VEN = increasing VEN2 Enable Pin Input Voltage 2 VEN = decreasing ILO Output Leakage Current VLF Flag "L" Output Voltage IFOF 0.50 Flag Off Current 1.00 µA V 2.0 0.1 ISINK = 1mA VFLAG = 5.5V °C 0.01 0.8 V 1.0 µA 0.4 V 1.00 µA (Note1) EN=L (R5523NXXXA), EN=H (R5523NXXXB) (Note2) EN=H (R5523NXXXA), EN=L (R5523NXXXB) 5 R5523N OPERATION This explanation is based on the typical application. Over-current limit Function In case that OUT pin and GND is short, if over-current would continue, the temperature of the IC would increase drastically. If the temperature of the IC is equal or more than 135°C (Typ.), the switch transistor turns off because of thermal shutdown protection. In other words, when the temperature of the IC becomes equal or more than 135°C( Typ.), both the over-current limit circuit and thermal shutdown circuit work for the protection of the IC. TEST CIRCUITS (1) Supply Current Test Circuit (2) Switch On Resistance Test Circuit IOUT VEN 1 EN 2 GND 3 FLG OUT 5 VEN IN 4 A 1 EN OUT 2 GND 3 FLG 5 V VON IN 4 VIN VIN 0.1µF 0.1µF (3) Output On Time Test Circuit (4) Over-current Limit Test Circuit IOUT VOUT 1 OUT EN 5 1 EN 2 GND 3 FLG OUT 5 IN 4 A 10Ω VEN 2 GND 3 FLG VEN IN 4 VIN 0.1µF 6 VIN 0.1µF R5523N (5) Over-current Threshold Test Circuit (6) Enable Input Voltage IOUT 1 EN OUT 100kΩ 5 1 EN OUT 5 V VEN 2 GND 3 FLG VEN IN 4 2 GND 3 FLG VOUT IN 4 VIN VIN 0.1µF 0.1µF (7) Flag Output Delay Time Test 1 EN (8) UVLO Threshold Test OUT 5 100kΩ 1 VEN 2 OUT 5 GND V VEN 3 EN FLG IN GND 3 FLG 4 IN 4 VIN 0.1µF VFLG 2 VOUT VIN 10kΩ 0.1µF TYPICAL APLICATION AND TECHNICAL NOTES • R5523N00XX 10kΩ to100kΩ VEN FLG EN VIN IN R5523Nxxxx OUT VOUT GND 0.1uF • Put a capacitance range from 0.1µF to 1µF bypass capacitor between IN pin and GND pin of the IC. 7 R5523N Without a bypass capacitor, in case of output short, because of the high side inductance of IN pin, the ringing may be generated and it might be a cause of an unstable operation. • Recommended pull-up resistance value range of flag pin is from 10kΩ to 100kΩ. TIMING CHART 50% VEN 50% tOFF tON 90% VOUT 10% Output On Time/Output Off Time 10% FLG Output Delay Time tFD 50% VEN VFLG TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current 2) 6.0 Output Voltage VOUT(V) Supply Current IDD1[uA] 25 5.0 VIN=5.5V 4.0 3.0 VIN=2.2V 2.0 1.0 0.0 0 200 400 600 800 Output Current IOUT(mA) 8 Supply Current vs. Temperature 1000 1200 20 15 10 VIN=2.2V VIN=5.5V 5 0 -40 -20 0 20 40 60 Temperature Topt [°C] 80 100 R5523N 3) Supply Current vs. Input Voltage 4) 180 Switch ON Resistance R ON [mΩ] Supply Current I DD1 [uA] 25 85°C 20 25°C 15 -40°C 10 5 0 160 140 120 100 80 60 VIN=2.2V 40 VIN=5.5V 20 0 2 2.5 3 3.5 4 4.5 Input Voltage VIN [V] 5 5.5 On Resistance vs. Input Voltage -40 6) 1200 160 1000 ON[us] 180 140 85°C 120 25°C 100 80 -40°C 60 3 4 Input Voltage VIN [V] 100 VIN=2.2V VIN=5.5V 600 400 200 -40 5 -20 0 20 40 60 80 100 Temperature Topt[°C] Output On Time vs. Input Voltage 8) Output Off Time vs. Temperature 14 1200 12 1000 -40°C 800 Output OFF Time tOFF[us] ON[us] 80 0 2 Output ON Time t 0 20 40 60 Temperature Topt [°C] 800 40 7) -20 Output On Time vs. Temperature Output ON Time t Switch ON Resistance R ON [mΩ] 5) On Resistance vs. Temperature 25°C 600 85°C 400 200 0 VIN=2.2V 10 VIN=5.5V 8 6 4 2 0 2 2.5 3 3.5 4 4.5 Input Voltage VIN[V] 5 5.5 -40 -20 0 20 40 60 Temperature Topt[°C] 80 100 9 R5523N 9) Output Off Time vs. Input Voltage 10) Short-current Limit vs. Temperature 1000 12 10 8 85°C 6 25°C 4 -40°C 2 900 Short Current Limit ILIM [mA] Output OFF Time t OFF[us] 14 800 700 600 500 400 100 0 2 2.5 3 3.5 4 4.5 Input Voltage VIN[V] 5 5.5 -40°C 800 750 700 650 25°C 85°C 600 550 500 2.0 2.5 3.0 3.5 4.0 4.5 Input Voltage VIN [V] 5.0 14) EN Threshold VEN1/VEN2[V] 1300 -40°C 1000 25°C 900 800 85°C 700 600 2.5 3.0 3.5 4.0 4.5 Input Voltage VIN(V) 100 VDD=5.5V -20 5.0 5.5 0 20 40 60 Temperature Topt(°C) 80 100 Enable Input Voltage vs. Temperature VIN=5.0V 2.0 1400 1100 80 VDD=2.2V -40 1500 1200 0 20 40 60 Temperature Topt [°C] 1500 1400 1300 1200 1100 1000 900 800 700 600 500 5.5 13) Over Current Threshold vs. Input Voltage 500 2.0 -20 12) Over Current Threshold vs. Temperature 1000 950 900 850 -40 Over Current Threshold ITH(mA) Short Current Limit ILIM[mA] 11) Short Current Limit vs. Input Voltage Over Current Threshold ITH(mA) VDD=5.5V 200 0 10 VDD=2.2V 300 1.6 1.2 0.8 VIH VIL 0.4 0.0 -40 -20 0 20 40 60 Temperature Topt[°C] 80 100 R5523N 15) Enable Input Voltage vs. VIN Input Voltage 16) Flag Output Delay Time vs. Temperature 20 EN Threshold Voltage VEN1/VEN2 [V] FLG Output Delay Time tFD[ms] Topt=25°C 2.0 1.6 1.2 0.8 VIH 0.4 VIL 0.0 16 14 12 10 8 6 VIN=2.2V 4 VIN=5.5V 2 0 2 2.5 3 3.5 4 4.5 Input Voltage VIN[V] 5 5.5 17) Flag Output Delay Time vs. VIN Input Voltage -40 -20 0 20 40 60 Temperature Topt [°C] 80 100 18) UVLO Threshold vs. Temperature 20 2.2 18 -40°C 16 UVLO Threshold VUVLO[V] FLG Output Delay Time tFD[ms] 18 25°C 14 85°C 12 10 8 6 4 2 0 2 2.5 3 3.5 4 4.5 Input Voltage VIN [V] 19) UVLO Characteristic at VIn increasing VEN=0V, CL=47µF, RL=35Ω VIN (2V/div) 5 5.5 2.1 2.0 VIN increasing 1.9 1.8 VIN decreasing 1.7 1.6 -40 -20 0 20 40 60 Temperature Topt[°C] 80 100 20) Turn on Response VIN=5V, CL=47µF, RL=35Ω VEN (10V/div) VFLG (2V/div) VFLG (5V/div) VOUT (2V/div) VOUT (5V/div) IOUT (100mA/div) IOUT (200mA/div) 4ms/div 1ms/div 11 R5523N 21) Turn off Response 22) Inrush current VIN=5V, CL=47µF, RL=35Ω VIN=5V, RL=35Ω VEN (10V/div) VEN (10V/div) VFLG (10V/div) VFLG (5V/div) CL=470μF CL=220μF VOUT (5V/div) CL=100μF IOUT (200mA/div) IOUT (200mA/div) 2ms/div CL=10μF 1ms/div 23) Current Limit Transient Response (Case: Enable to Short) 24) Thermal Shutdown Operation VIN=5V 2ms/div VIN=5V, CL=47µF 100ms/div VEN (5V/div) VFLG (5V/div) VFLG (5V/div) 13.8ms VOUT (5V/div) VFLG (5V/div) IOUT (500mA/div) (500mA/div) IIOUT OUT (500mA/div) 25) Current Limit Transient Response (Case: Output short during enable) VIN=5V, CL=47µF VFLG (5V/div) 26) Zoomed in 25) VIN=5V, CL=47µF VOUT (5V/div) VOUT (5V/div) IOUT (2A/div) IOUT (2A/div) 2ms/div 12 100us/div