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| 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. 130m) and low supply current (Typ. 20A 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 m (Typ.) P-channel MOSFET Switch * Low Supply Current Typ. 20A (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 EN GATE CONTROL 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 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 Designation of the taping type. TR (Refer to the taping specifications.) Description Designation of the output current. 2 R5523N PIN CONFIGURATION SOT23-5 5 4 1 2 3 ABSOLUTE MAXIMUM RATINGS Topt=25C Symbol VIN VEN VFLG IFLG VOUT IOUT PD Topt Tstg Item Input Voltage Enable Pin Input Voltage Flag Voltage Flag Current Output Voltage Output Current Power Dissipation Operating Temperature Storage Temperature Ratings 6.5 -0.3 ~ VIN+0.3 -0.3 ~ 6.5 14 -0.3 ~ VIN+0.3 Unit V V V mA V Internal Limited Internal Limited -40 ~ +85 -55 ~ +125 C 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. 1 2 3 4 5 Symbol EN GND FLG VIN VOUT description Enable Pin Ground Pin FLG pin (Open Drain Output) Power Supply Pin Output pin ELECTRICAL CHARACTERISTICS * R5523N001A/B Symbol VIN IDD1 IDD2 RON tON tOFF VUVLO VHYS ITH ILIM tFD TTS IEN VEN1 VEN2 ILO VLF IFOF Item Input Voltage Supply Current 1 Supply Current 2 Switch On Resistance Output Turn-on Delay Output Turn-off Delay UVLO Threshold UVLO Hysteresis Range Current Limit Threshold Short Current Limit Over Current Flag Delay Thermal Shutdown Temperature Threshold Enable Pin Input Current Enable Pin Input Voltage 1 Enable Pin Input Voltage 2 Output Leakage Current Flag "L" Output Voltage Flag Off Current ISINK = 1mA VFLAG = 5.5V 0.01 VEN = increasing VEN = decreasing 0.1 2.0 0.8 1.0 0.4 1.00 VOUT=0V From Over Current to FLG = "L" Tj =increasing Tj =decreasing 0.50 5 *Note1 VOUT = open (Note1) *Note2 OUT = open, (Note2) VIN = 5V, IOUT=500mA VIN = 5V, RL=60 VIN = 5V, RL=60 VIN = increasing VIN = decreasing 1.6 Conditions Min. 2.2 20 0.1 130 400 5 1.9 0.1 1.0 0.75 10 135 120 0.01 1.00 1.5 1.30 20 Typ. Topt=25C Max. 5.5 45 1.0 180 Unit V A A m s s V V A A ms C A V V A V A 4 R5523N * R5523N002A/B Symbol VIN IDD1 IDD2 RON tON VUVLO ITH ILIM tFD TTS IEN VEN1 VEN2 ILO VLF IFOF Item Input Voltage Supply Current 1 Supply Current 2 Switch On Resistance Output Turn-on Delay UVLO Threshold Current Limit Threshold Short Current Limit Over Current Flag Delay Thermal Shutdown Temperature Threshold Enable Pin Input Current Enable Pin Input Voltage 1 Enable Pin Input Voltage 2 Output Leakage Current Flag "L" Output Voltage Flag Off Current ISINK = 1mA VFLAG = 5.5V 0.01 VEN = increasing VEN = decreasing 0.1 2.0 VOUT=0V From Over Current to FLG = "L" Tj =increasing Tj =decreasing 0.25 5 *Note1 VOUT = open (Note1) *Note2 OUT = open, (Note2) VIN = 5V, IOUT=500mA RL=60 VIN = increasing VIN = decreasing 1.6 Conditions Min. 2.2 20 0.1 130 400 1.9 1.8 0.50 0.35 10 135 120 0.01 Typ. Topt=25C Max. 5.5 45 1.0 180 Unit V A A m s V V 0.75 0.50 20 A A ms C 1.00 A V 0.8 1.0 0.4 1.00 V A V A (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 135C (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 135C( 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 1 EN OUT 5 (2) Switch On Resistance Test Circuit IOUT 1 EN OUT 5 VEN 2 GND VEN 2 GND V VON 3 FLG IN 4 A 3 FLG IN 4 VIN 0.1F VIN 0.1F (3) Output On Time Test Circuit VOUT 1 EN OUT 5 10 (4) Over-current Limit Test Circuit IOUT 1 EN OUT 5 A VEN 2 GND VEN 2 GND 3 FLG IN 4 3 FLG IN 4 VIN 0.1F 0.1F VIN 6 R5523N (5) Over-current Threshold Test Circuit IOUT 1 EN OUT 5 (6) Enable Input Voltage 100k 1 EN OUT 5 V VEN 2 GND VEN 2 GND VOUT 3 FLG IN 4 3 FLG IN 4 VIN 0.1F 0.1F VIN (7) Flag Output Delay Time Test (8) UVLO Threshold Test 1 EN OUT 5 100k 1 EN OUT 5 V VEN 2 GND VOUT VEN 2 GND 3 FLG IN 4 3 FLG IN 4 0.1F 10k VIN VIN 0.1F VFLG TYPICAL APLICATION AND TECHNICAL NOTES * R5523N00XX 10k to100k VEN EN FLG VIN IN R5523Nxxxx OUT VOUT GND 0.1uF * Put a capacitance range from 0.1F to 1F 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 10k to 100k. TIMING CHART VEN 50% 50% tOFF tON 90% VOUT 10% Output On Time/Output Off Time tFD VEN 50% VFLG 10% FLG Output Delay Time TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current 6.0 VIN=5.5V 2) 25 Supply Current IDD1[uA] 20 15 10 5 0 Supply Current vs. Temperature 5.0 Output Voltage VOUT(V) 4.0 3.0 2.0 1.0 0.0 0 200 VIN=2.2V VIN=2.2V VIN=5.5V 400 600 800 1000 1200 -40 -20 Output Current IOUT(mA) 0 20 40 60 Temperature Topt [C] 80 100 8 R5523N 3) Supply Current vs. Input Voltage 25 Supply Current IDD1 [uA] 20 15 10 5 0 2 2.5 3 3.5 4 4.5 Input Voltage VIN [V] 5 5.5 4) 180 On Resistance vs. Temperature 160 140 120 100 80 60 40 20 0 -40 -20 0 20 40 60 Temperature Topt [C] 80 100 VIN=2.2V VIN=5.5V 85C 25C -40C 5) On Resistance vs. Input Voltage 180 Switch ON Resistance R ON [m] Switch ON Resistance R ON [m] 6) Output On Time vs. Temperature 1200 ON[us] 160 140 120 100 80 60 40 2 3 4 Input Voltage VIN [V] 5 1000 800 600 400 200 0 -40 -20 0 20 40 60 VIN=2.2V VIN=5.5V 85C 25C -40C Output ON Time t 80 100 Temperature Topt[C] 7) Output On Time vs. Input Voltage 1200 8) 14 12 Output OFF Time tOFF[us] Output Off Time vs. Temperature ON[us] 1000 800 600 -40C 25C 85C VIN=2.2V VIN=5.5V 10 8 6 4 2 0 Output ON Time t 400 200 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 14 OFF[us] 10) Short-current Limit vs. Temperature 1000 Short Current Limit ILIM [mA] 900 800 700 600 500 400 300 200 100 0 -40 -20 0 20 40 60 Temperature Topt [C] 80 100 VDD=2.2V VDD=5.5V 12 10 8 6 4 2 0 2 2.5 3 3.5 4 4.5 Input Voltage VIN[V] 5 5.5 Output OFF Time t 85C 25C -40C 11) Short Current Limit vs. Input Voltage Short Current Limit ILIM[mA] 1000 950 900 850 800 750 700 650 600 550 500 2.0 2.5 12) Over Current Threshold vs. Temperature 1500 1400 1300 1200 1100 1000 900 800 700 600 500 -40 -20 Over Current Threshold ITH(mA) -40C VDD=2.2V VDD=5.5V 25C 85C 3.0 3.5 4.0 4.5 Input Voltage VIN [V] 5.0 5.5 0 20 40 60 Temperature Topt(C) 80 100 13) Over Current Threshold vs. Input Voltage 1500 Over Current Threshold ITH(mA) 1400 1300 1200 1100 1000 900 800 700 600 500 2.0 2.5 3.0 3.5 4.0 4.5 Input Voltage VIN(V) 5.0 5.5 -40C 25C 85C 14) 2.0 EN Threshold VEN1/VEN2[V] 1.6 1.2 0.8 0.4 0.0 Enable Input Voltage vs. Temperature VIN=5.0V VIH VIL -40 -20 0 20 40 60 Temperature Topt[C] 80 100 10 R5523N 15) Enable Input Voltage vs. VIN Input Voltage 2.0 EN Threshold Voltage VEN1/VEN2 [V] 1.6 1.2 0.8 0.4 0.0 2 2.5 3 3.5 4 4.5 Input Voltage VIN[V] 5 5.5 VIH VIL Topt=25C 16) Flag Output Delay Time vs. Temperature 20 FLG Output Delay Time tFD[ms] 18 16 14 12 10 8 6 4 2 0 -40 -20 0 20 40 60 Temperature Topt [C] 80 100 VIN=2.2V VIN=5.5V 17) Flag Output Delay Time vs. VIN Input Voltage 20 FLG Output Delay Time tFD[ms] 18 16 14 12 10 8 6 4 2 0 2 2.5 3 3.5 4 4.5 Input Voltage VIN [V] 5 5.5 18) UVLO Threshold vs. Temperature 2.2 UVLO Threshold VUVLO[V] -40C 25C 85C 2.1 2.0 1.9 1.8 1.7 1.6 -40 -20 0 20 40 60 Temperature Topt[C] 80 100 VIN decreasing VIN increasing 19) UVLO Characteristic at VIn increasing VEN=0V, CL=47F, RL=35 20) Turn on Response VIN=5V, CL=47F, RL=35 VEN (10V/div) VIN (2V/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 VIN=5V, CL=47F, RL=35 22) Inrush current VIN=5V, RL=35 2ms/div 1ms/div 23) Current Limit Transient Response (Case: Enable to Short) 24) Thermal Shutdown Operation VIN=5V 2ms/div VIN=5V, CL=47F 100ms/div VEN (5V/div) VFLG (5V/div) VFLG (5V/div) 13.8ms VOUT (5V/div) IOUT (500mA/div) IOUT (500mA/div) 25) Current Limit Transient Response (Case: Output short during enable) VIN=5V, CL=47F 26) Zoomed in 25) VIN=5V, CL=47F VFLG (5V/div) VOUT (5V/div) VOUT (5V/div) IOUT (2A/div) IOUT (2A/div) 2ms/div 100us/div 12 |
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