APPLICATION MANUAL LDO REGULATOR WITH ON/OFF SWITCH TK717xxS CONTENTS 1 . DESCRIPTION 2 2 . FEATURES 2 3 . APPLICATIONS 2 4 . PIN CONFIGURATION 2 5 . BLOCK DIAGRAM 2 6 . ORDERING INFORMATION 3 7 . ABSOLUTE MAXIMUM RATINGS (BOTH C AND I RANK IN COMMON) 4 8 . ELECTRICAL CHARACTERISTICS 5 9 . TEST CIRCUIT 11 10 . TYPICAL CHARACTERISTICS 12 11 . APPLICATIONS INFORMATION 20 12 . PACKAGE OUTLINE 24 13 . NOTES 25 14 . OFFICES 25 GC3-H006F Page 1 TK717xxS LDO REGULATOR WITH ON/OFF SWITCH TK717xxS 1. DESCRIPTION 3. APPLICATIONS The TK717xxS is an integrated circuit with a silicon monolithic bipolar structure. The regulator is of the low Any Electronic Equipment Battery Powered Systems Mobile Communication saturation voltage output type with very little quiescent current (72mA). The PNP power transistor is built-in. 4. PIN CONFIGURATION The I/O voltage difference is 163 mV (typical) when a current of 200mA is supplied to the system. Because of the low voltage drop, the voltage source can be Vin 1 GND 2 Vcont 3 effectively used; this makes it very suitable for battery 5 Vout 4 Np powered equipment. The on/off function is built into the IC. The current during standby mode becomes very small (pA level). In addition, the output short-circuit function works at off times. It is a unique characteristic by which the residual charge of the output side capacitor is rapidly discharged. The output voltage is available from 1.5 to 10.0V in 0.1V Top View steps. The output voltage is trimmed with high accuracy. This allows the optimum voltage to be selected for the equipment. 5. BLOCK DIAGRAM The over current sensor circuit and the reverse-bias protection circuit are built-in. Vin Vout It is a very rugged design because the ESD protection is Control Circuit high. Therefore, the TK717xxS can be used with Constant Current Source confidence. When mounted on the PCB, the power dissipation rating becomes about 500mW, even though GND 700kW the package is very small. The TK717xxS features very high stability in both DC Bandgap Reference Auto Discharge Circuit and AC. The capacitor on the output side provides stable operation with 0.22mF with 2.0VVout. A Over Heat & Over Current Protection Vcont Np capacitor of any type can be used; however, the larger this capacitor is, the better the overall characteristics are. 2. FEATURES Built-in shunt circuit of output to GND High Precision output voltage(50mV or 1.5) Good ripple rejection ratio(80dB at 1kHz) Built-in short circuit protection and thermal shutdown Built-in on/off control (High On) Built-in reverse bias over current protection GC3-H006F Page 2 TK717xxS 6. ORDERING INFORMATION ORDERING INFORMATION T K 717 S L Voltage Code ex. 3.3V : 33 5.0V : 50 Tape / Reel Code Package Code S : SOT23-5 V OUT 1.5 v 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 V CODE 15 16 17 18 19 20 21 22 23 24 V OUT 2.5 v 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 Rank Code C : C Rank I : I Rank V CODE 25 26 27 28 29 30 31 32 33 34 V OUT 3.5 v 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 GC3-H006F V CODE 35 36 37 38 39 40 41 42 43 44 V OUT 4.5 v 4.6 4.7 4.8 4.9 5.0 V CODE 45 46 47 48 49 50 Page 3 TK717xxS 7. ABSOLUTE MAXIMUM RATINGS (BOTH C AND I RANK IN COMMON) Ta=25C Parameter Absolute Maximum Ratings Supply Voltage Symbol Rating Units VccMAX -0.4 ~ 16 -0.4 ~ 6 V V -0.4 ~ 12 -0.4 ~ 5 -0.4 ~ 16 -55 ~ 150 500 when mounted on a PCB V V V Reverse Bias VrevMAX Np pin Voltage Control pin Voltage Storage Temperature Range VnpMAX VcontMAX Tstg Power Dissipation Operating Condition Operating Temperature Range PD Conditions Vout 2.0V 2.1V Vout C mW Internal Limited Tj=150C * -40 ~ 85 C 2.1 ~ 14 V TOP =-40 ~ 85C Operating Voltage Range VOP 1.8 ~ 14 V TOP =-30 ~ 80C Short Circuit Current Ishort 410 mA * PD must be decreased at rate of 4.0mW/C for operation above 25C. The maximum ratings are the absolute limitation values with the possibility of the IC being damaged. If the operation exceeds any of these standards, quality cannot be guaranteed. . TOP GC3-H006F Page 4 TK717xxS 8. ELECTRICAL CHARACTERISTICS 8-1. Electrical Characteristics of the C rank The operation between -40 ~ 85C is guaranteed by design. The parameter with limit value will be guaranteed with test when manufacturing or SQC (Statistical Quality Control) technique. Vin=VoutTYP+1V, Vcont=1.8V, Ta=25C Parameter Symbol Value MIN TYP MAX Refer to TABLE 1 0.0 5.0 Output Voltage Line Regulation Load Regulation Vout LinReg LoaReg Dropout Voltage *1 Vdrop Maximum Output Current *2 Supply Current IoutMAX Icc Refer to TABLE 1 Refer to TABLE 1 65 130 103 200 163 300 163 300 280 370 72 110 Standby Current Quiescent Current Discharge Current Control Terminal Control Current Control Voltage Istandby Iq Idis 0.0 0.1 0.8 1.5 Refer to TABLE 1 Icont Vcont 1.8 1.6 - 0.86 - 2.5 0.35 0.6 Units V mV mV mV mV mV mV mV mA Conditions Iout = 5mA mA DVin = 5V Iout = 5mA ~ 100mA Iout = 5mA ~ 200mA Iout = 50mA Iout = 100mA Iout = 180mA (2.1V Vout 2.3V) Iout = 200mA (2.4V Vout) When Vout down 0.3V Iout = 0mA mA mA mA Vcont = 0V Iout = 50mA Vrev=VoutTYP mA V V V V Vcont = 1.8V Vout ON state Vout OFF state Vout ON state Vout OFF state TOP=-40~85C TOP=-30~80C *1: For Vout 2.0V , no regulations. *2: The maximum output current is limited by power dissipation. GC3-H006F Page 5 TK717xxS TABLE 1. Output Voltage, Load Regulation, Discharge Current Part Number VoutTYP=1.3V ~ 2.0V TK71713SC TK71714SC TK71715SC TK71716SC TK71717SC TK71718SC TK71719SC TK71720SC VoutTYP=2.1V ~ 3.0V TK71721SC TK71722SC TK71723SC TK71724SC TK71725SC TK71726SC TK71727SC TK71728SC TK71729SC TK71730SC VoutTYP=3.1V ~ 4.0V TK71731SC TK71732SC TK71733SC TK71734SC TK71735SC TK71736SC TK71737SC TK71738SC TK71739SC TK71740SC Discharge Current Load Regulation Output Voltage Iout = 100mA TYP MAX mV mV Iout = 200mA TYP MAX mV mV Vrev =VoutTYP MIN TYP mA mA MIN V TYP V MAX V 1.250 1.350 1.450 1.550 1.650 1.750 1.850 1.950 1.300 1.400 1.500 1.600 1.700 1.800 1.900 2.000 1.350 1.450 1.550 1.650 1.750 1.850 1.950 2.050 7 7 7 7 7 7 7 7 16 17 17 17 17 17 18 18 15 16 16 16 17 17 17 18 38 38 39 40 40 41 42 43 10 11 13 15 16 17 18 19 15 18 20 22 24 26 28 29 2.050 2.150 2.250 2.350 2.450 2.550 2.650 2.750 2.850 2.950 2.100 2.200 2.300 2.400 2.500 2.600 2.700 2.800 2.900 3.000 2.150 2.250 2.350 2.450 2.550 2.650 2.750 2.850 2.950 3.050 7 7 7 8 8 8 8 8 8 8 21 21 21 22 22 22 22 23 23 23 18 18 18 19 19 19 20 20 20 21 50 51 52 53 54 55 55 56 57 58 20 21 22 22 23 24 24 24 25 25 31 32 33 34 35 36 36 37 38 38 3.050 3.150 3.250 3.349 3.447 3.546 3.644 3.743 3.841 3.940 3.100 3.200 3.300 3.400 3.500 3.600 3.700 3.800 3.900 4.000 3.150 3.250 3.350 3.451 3.553 3.654 3.756 3.857 3.959 4.060 8 8 8 8 8 9 9 9 9 9 23 23 24 24 24 24 25 25 25 25 21 21 21 22 22 22 23 23 23 24 59 60 60 61 62 63 64 65 66 66 25 26 26 26 26 27 27 27 27 27 39 39 39 40 40 40 41 41 41 41 GC3-H006F Page 6 TK717xxS TABLE 1. Output Voltage, Load Regulation, Discharge Current (continue) Load Regulation Output Voltage Part Number VoutTYP=4.1V ~ 5.0V TK71741SC TK71742SC TK71743SC TK71744SC TK71745SC TK71746SC TK71747SC TK71748SC TK71749SC TK71750SC VoutTYP=5.3V, 5.4V TK71753SC TK71754SC Iout = 100mA TYP MAX mV mV Iout = 200mA TYP MAX mV mV Discharge Current Vrev =VoutTYP MIN TYP mA mA MIN V TYP V MAX V 4.038 4.137 4.235 4.334 4.432 4.531 4.629 4.728 4.826 4.925 4.100 4.200 4.300 4.400 4.500 4.600 4.700 4.800 4.900 5.000 4.162 4.263 4.365 4.466 4.568 4.669 4.771 4.872 4.974 5.075 9 9 9 9 9 9 9 10 10 10 26 26 26 26 27 27 27 27 27 28 24 24 24 25 25 25 26 26 26 27 67 68 69 70 71 71 72 73 74 75 28 28 28 28 28 28 29 29 29 29 42 42 42 42 43 43 43 43 44 44 5.220 5.319 5.300 5.400 5.380 5.481 10 10 28 29 27 28 77 78 36 36 55 55 GC3-H006F Page 7 TK717xxS 8-2. Electrical Characteristics of the I rank The operation between -40 ~ 85C is guaranteed by design. The parameter with limit value will be guaranteed with test when manufacturing or SQC (Statistical Quality Control) technique. Vin=VoutTYP+1V,Vcont=1.8V,Ta=-40 ~ 85C Parameter Symbol Value MIN TYP MAX Refer to TABLE 2 0.0 8.0 Output Voltage Line Regulation Vout LinReg Load Regulation LoaReg Dropout Voltage *1 Vdrop Maximum Output Current *2 Supply Current IoutMAX Icc Standby Current Quiescent Current Discharge Current Control Terminal Control Current Istandby Iq Idis - Icont - 0.86 3.0 Control Voltage Vcont 1.8 - - 0.35 Refer to TABLE 2 Refer to TABLE 2 65 180 103 270 163 350 163 350 250 370 72 120 0.0 0.5 0.8 1.8 Refer to TABLE 2 Units V mV Conditions Iout = 5mA mA DVin = 5V Iout = 5mA ~ 100mA Iout = 5mA ~ 200mA Iout = 50mA Iout = 100mA Iout = 180mA (2.2V Vout 2.3V) Iout = 200mA (2.4V Vout) When Vout down 0.3V Iout = 0mA mA mA mA Vcont = 0V Iout = 50mA Vrev=VoutTYP mA V V Vcont = 1.8V mV mV mV mV mV mV mA Vout ON state Vout OFF state *1: For Vout 2.1V , no regulations. *2: The maximum output current is limited by power dissipation. GC3-H006F Page 8 TK717xxS TABLE 2. Output Voltage, Load Regulation, Discharge Current Part Number VoutTYP=1.3V ~ 2.0V TK71713SI TK71714SI TK71715SI TK71716SI TK71717SI TK71718SI TK71719SI TK71720SI VoutTYP=2.1V ~ 3.0V TK71721SI TK71722SI TK71723SI TK71724SI TK71725SI TK71726SI TK71727SI TK71728SI TK71729SI TK71730SI VoutTYP=3.1V ~ 4.0V TK71731SI TK71732SI TK71733SI TK71734SI TK71735SI TK71736SI TK71737SI TK71738SI TK71739SI TK71740SI Discharge Current Load Regulation Output Voltage Iout = 100mA TYP MAX mV mV Iout = 200mA TYP MAX mV mV Vrev =VoutTYP MIN TYP mA mA MIN V TYP V MAX V 1.220 1.320 1.420 1.520 1.620 1.720 1.820 1.920 1.300 1.400 1.500 1.600 1.700 1.800 1.900 2.000 1.380 1.480 1.580 1.680 1.780 1.880 1.980 2.080 7 7 7 7 7 7 7 7 26 26 26 27 27 27 28 28 15 16 16 16 17 17 17 18 49 50 52 53 54 56 57 58 7 8 9 10 11 12 13 13 15 18 20 22 24 26 28 29 2.020 2.120 2.220 2.320 2.420 2.520 2.620 2.720 2.820 2.920 2.100 2.200 2.300 2.400 2.500 2.600 2.700 2.800 2.900 3.000 2.180 2.280 2.380 2.480 2.580 2.680 2.780 2.880 2.980 3.080 7 7 7 8 8 8 8 8 8 8 28 29 29 29 30 30 30 31 31 31 18 18 18 19 19 19 20 20 20 21 60 61 63 64 65 67 68 69 71 72 14 15 15 16 16 16 17 17 17 17 31 32 33 34 35 36 36 37 38 38 3.020 3.120 3.217 3.315 3.412 3.510 3.607 3.705 3.802 3.900 3.100 3.200 3.300 3.400 3.500 3.600 3.700 3.800 3.900 4.000 3.180 3.280 3.383 3.485 3.588 3.690 3.793 3.895 3.998 4.100 8 8 8 8 8 9 9 9 9 9 32 32 32 33 33 33 34 34 34 35 21 21 21 22 22 22 23 23 23 24 74 75 76 78 79 81 82 83 85 86 18 18 18 18 18 19 19 19 19 19 39 39 39 40 40 40 41 41 41 41 GC3-H006F Page 9 TK717xxS TABLE 2. Output Voltage, Load Regulation, Discharge Current (continue) Load Regulation Output Voltage Part Number VoutTYP=4.1V ~ 5.0V TK71741SI TK71742SI TK71743SI TK71744SI TK71745SI TK71746SI TK71747SI TK71748SI TK71749SI TK71750SI VoutTYP=5.3V, 5.4V TK71753SI TK71754SI Iout = 100mA TYP MAX mV mV Iout = 200mA TYP MAX mV mV Discharge Current Vrev =VoutTYP MIN TYP mA mA MIN V TYP V MAX V 3.997 4.095 4.192 4.290 4.387 4.485 4.582 4.680 4.777 4.875 4.100 4.200 4.300 4.400 4.500 4.600 4.700 4.800 4.900 5.000 4.203 4.305 4.408 4.510 4.613 4.715 4.818 4.920 5.023 5.125 9 9 9 9 9 9 9 10 10 10 35 35 36 36 36 37 37 38 38 38 24 24 24 25 25 25 26 26 26 27 87 89 90 92 93 94 96 97 99 100 19 19 19 20 20 20 20 20 20 20 42 42 42 42 43 43 43 43 44 44 5.167 5.265 5.300 5.400 5.433 5.535 10 10 39 40 27 28 104 105 25 25 55 55 GC3-H006F Page 10 TK717xxS 9. TEST CIRCUIT Vin Icc Cin A + 1 Vin Vout 5 CL 1.0uF 2 GND 3 Vcont 1.0uF Iout + Vout V Icont Vcont A Np 4 Cnp 0.01uF GC3-H006F Page 11 TK717xxS 10. TYPICAL CHARACTERISTICS 10-1. DC characteristics Line regulation Vout(mV) 15 10 5 0 -5 -10 -15 -20 -25 -30 -35 10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 Vo1.5V Vo2.0V Vo3.0V Vo4.0V Vo5.0V 0 5 10 Vin(V) Load regulation Vout(mV) 15 20 Vo=2.0V Vo=3.0V Vo=5.0V 0 50 Vin vs Vout Vout(mV) 200 Dropout voltage Vdrop(mV) 0 Iout=0250mA 20 0 -20 -40 -60 -80 -100 -120 -140 -160 -180 100 150 Iout (mA) -50 -100 -150 -200 Iout=50mA Step -250 -300 -350 -100 0 100 Vin(mV) 200 300 Short Circuit current Vout(V) 0 50 400 4.0 350 250 300 IoutMax at low Vop TK71715TK71724 IoutMax(mA) 5.0 100 150 200 Iout (mA) 300 3.0 250 2.0 200 1.0 150 0.0 0 100 200 300 Iout (mA) 400 500 100 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 Vop(V) GC3-H006F Page 12 TK717xxS Discharge current Idis(mA) 60 50 1.0E-07 40 1.0E-08 30 1.0E-09 20 1.0E-10 10 1.0E-11 0 0.0 1.0 2.0 3.0 Standby current Is(A) 1.0E-06 4.0 5.0 1.0E-12 0 5 Vout(V) Control current Io=0mA Icont(uA) 4.5 4.0 3.5 Vout 3.0 2.5 Icont 2.0 1.5 1.0 0.5 0.0 0 1 2 3 4 Ignd(mA) 10 9 8 7 6 5 4 3 2 1 0 0 Vcont(V 10 Vin(V) 15 20 150 200 GND pin current 50 100 Iout (mA) Icc at Low voltage Io=0mA Iin(mA) 1.8 1.6 Vo2.0V Vo3.0V Vo4.0V Vo5.0V 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0 1 2 3 4 5 6 7 8 9 10 Vin(V) GC3-H006F Page 13 TK717xxS 10-2. Temperature characteristics Dropout voltage Vdrop(mV) IoutMax(mA) Iout=30/50/100/150/200/250/280mA 300 Io=280mA 250 Io=200mA 400 Io=150mA 150 350 Io=100mA 100 300 Io=50mA 50 0 -50 500 450 Io=250mA 200 IoutMax Io=30mA -25 0 25 50 75 When Vout down 0.3V 250 100 200 -50 -25 0 50 45 40 35 30 25 20 15 10 5 0 Discharge current 75 100 GND pin current Ignd(mA) Iout=30/60/100/150/200mA 8.0 Vrev=3.0V 7.0 Io=200mA 6.0 5.0 Vrev=2.0V Io=150mA 4.0 3.0 Io=100mA 2.0 Io=60mA 1.0 -50 -25 0 25 Ta() 50 75 100 Control current Icont(uA) 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 50 Ta() Ta() Idis (mA) 25 Vcont=1.8/2.0/3.0/4.0V Vcont=4.0V 0.0 -50 Io=30mA -25 0 25 50 Ta() 75 100 On/Off point voltage Vcont(V) 1.6 1.4 Vcont(ONpoint) 1.2 1.0 Vcont=1.8V -50 -25 0 25 Ta() 50 75 100 0.8 Vcont(OFFpoint) 0.6 -50 -25 GC3-H006F 0 25 Ta() 50 75 100 Page 14 TK717xxS Vout(mV) 20 15 10 5 0 -5 -10 -15 -20 -25 -30 -50 -25 20 15 10 5 0 -5 -10 -15 -20 -25 -30 0 25 50 Ta() 75 100 Vout=4.0V Vout(mV) 20 15 10 5 0 -5 -10 -15 -20 -25 -30 -50 Vout(mV) Vout=2.0V -25 0 25 50 Ta() -50 Vout=3.0V -25 75 100 GC3-H006F 25 Ta() 50 75 100 Vout=5.0V Vout(mV) 20 15 10 5 0 -5 -10 -15 -20 -25 -30 -50 0 -25 0 25 50 Ta() 75 100 Page 15 TK717xxS 10-3. Low voltage device The operating initial voltage at normal temperature is about 1.6V. The voltage dependency of the output current at the low input voltage is large. The operating initial voltage rises at low temperature. TK71715S Vout(mV) 20 0 -20 -40 Iout=0mA -60 -80 -100 -120 -140 -160 50mA Step -180 Iout=0mA,50mA,100mA,150mA,200mA -200 -100 0 100 200 300 (1.5V) Vin(mV) Vout(V) 1.60 1.55 1.50 1.45 1.40 1.35 1.30 1.25 1.20 1.15 1.10 0 Vout(mV) 20 0 -20 Iout=0mA -40 -60 -80 -100 -120 -140 50mA Step -160 Iout=0mA,50mA,100mA,150mA,200mA -180 Vout(V) 1.90 1.85 1.80 1.75 1.70 1.65 1.60 1.55 1.50 1.45 1.40 0 -200 -100 0 (1.8V 100 Vin(mV) 200 300 TK71720S 50mA Step Iout=0mA,50mA,100mA,150mA,200mA 0 (2.0V Vin2.0V Vin=1.8V 100 100 200 Vin(mV) 300 2.10 2.05 2.00 1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 GC3-H006F 1.9V 200 Iout(mA) 300 400 Iout MAX Vin2.0V Vin=1.8V 100 1.9V 200 Iout(mA) 300 400 Iout MAX Vout(V) Vout(mV) 20 0 -20 -40 Iout=0mA -60 -80 -100 -120 -140 -160 -180 -200 -100 Iout MAX Vin2.1V 2.0V Vin=1.8V 0 100 1.9V 200 Iout(mA) 300 400 Page 16 TK717xxS 10-4. Output noise TK71730S Cnp vs Noise Iout=30mA BPF=400Hz80kHz Vout vs Noise Cnp vs Noise NoiseuVrms) 300 CL= Noise(uVrms) CL=0.22uF 250 CL=0.47uF 200 CL=1.0uF 60 CL=2.2uF 50 150 CL=10uF 30 BPF=400Hz80kHz 20 50 0 40 CL= 100 Iout=30mA Cnp=103 CL=1.0uF 70 1 10 100 Noise(uVrms) 70 65 60 55 50 45 40 35 30 1000 10000 100000 CnpF CL= Noise(uVrms) Cnp=103 CL=0.22uF CL=0.47uF CL=1.0uF CL=2.2uF CL=10uF 0 10 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Vout(V) 25 50 75 100 125 150 175 200 Iout(mA) 70 65 60 55 50 45 40 35 30 CL= Cnp=103 CL=0.22uF CL=0.47uF CL=1.0uF CL=2.2uF CL=10uF 0 25 50 75 100 125 150 175 200 Iout(mA) For better noise reduction, it is more effective to increase Cnp without increasing CL. The recommended Cnp capacitance is 6800pF (682) or 0.01mF (103). As the output voltage increases, the noise will also increase. Please increase this capacitance when low noise is demanded. The IC does not operate abnormally about 0.1 and 0.22mF. TK71730S Cin=10F Iout=10mA Noise(mV/Hz) 10 MLCC : Multi Layer Ceramic Capacitor. CL=0.22mFCeramic) TANTAL : Tantalum Capacitor. Cnp=0.01mF 1 0.1 Cnp=0.10mF 0.01 0.01 0.1 1 10 FrequencykHz) 100 GC3-H006F Page 17 TK717xxS 10-5. Ripple Rejection Vin=5.0V Vout=3.0V Iout=10mA VR=500mVp-p f=1001MHz Cin=0 pF Cnp=0.01uF M.L.Ceramic Capacitor 500mVp-p Vin GND Tantalum Capacitor The ripple rejection characteristic depends on the characteristic and the capacitance value of the capacitor connected to the output side. The RR characteristic of 50kHz or more varies greatly with the capacitor on the output side and PCB pattern. If necessary, please confirm stability while operating. Ripple RejectionRR vs Iout R.R(dB) RR (dB) 0 Cnp=0.01F CL=0.22FCeramic) Vin=5.0V Vripple=500mVp-p RR -10 Cnp:0.01F -20 Iout:1,50,100,150,200mA Freq:1kHz CL:0.22FCeramic) -30 -40 Iout=200mA -50 Freq=1kHz -60 -70 -80 Freq=400Hz Iout=1mA -90 -100 0 25 50 75 100 125 Iout(mA) 150 175 200 Vin=Vout GC3-H006F +0.2 +0.4 +0.6 +0.8 +1 Vin-Vout_Typ(V) Page 18 TK717xxS 10-6. Transient The stability level to a rapid power-supply voltage change and a load current change greatly depends on the value of the output side capacitor and the noise bypass capacitor. Please refer to the figure below. Iout vs step response 1 Vcc vs step response Iout vs step response 2 10SDiv 500SDiv 2mSDiv 30mA Vo+2 30mA Iout Iout 0mA Vin 0mA Vo+1 CL=1F 10F Vo ut 2.2F 4.7F 10F 4.7F Vo Cnp=0.001F,CL=1.0F Io=30mA 2.2F Vout CL=1F Cnp=0.001mF 100mV/Div 10mV/DiV 20mV/Div If the current is thrown into the load, the step response is settled fast. On/Off Speed The on/off switching speed quickens when the Cnp and CL capacitance is reduced. However, the Load transient and Line transient response deteriorate when the capacitance is small. In addition, the noise increases. We will recommend CL=0.22mF and Cnp=1000pF to the demand of high-speed operation. Please increase each capacitance when low noise is desired. The on/off switch speed greatly depends on the value of the output side capacitor and the noise bypass capacitor. Please refer to the figures below. on/off Speed 2: CL=2.2m on/off Speed 1: Cnp=1000pF 2.2mF 100pF 0.001mF 4.7mF 1mF CL=10mF Cnp=0.01m Load =30mA I Load=30mA 0 10 20 30 40 50 60 70 200 0 mS on 400 600 800mS off Speed: CL=2.2mF Cnp=1000pF I Load=0mA TK717xxS has a short circuit during off . TK736xxAME has a Disconnect circuit during off. TK111xxC is a normal regulator. Please refer to the figure. Vout TK736xxAME TK111xxC TK717xxS 0 GC3-H006F 200 400 600 mS Page 19 TK717xxS 11. APPLICATIONS INFORMATION 11-1. Input / output capacitors Linear regulators require input and output capacitors in order to maintain the regulator's loop stability. The equivalent series resistance (ESR) of the output capacitor must be in the stable operation area. However, it is recommended to use as large a value of capacitance as is practical. The output noise and the ripple noise decrease as the capacitance value increases. ESR values vary widely between ceramic and tantalum capacitors. However, tantalum capacitors are assumed to provide more ESR damping resistance, which provides greater circuit stability. This implies that a higher level of circuit stability can be obtained by using tantalum capacitors when compared to ceramic capacitors with similar values. Vout The recommended values: Vout2.0V CL0.22mF. Iout0.5mA Vout1.5V CL0.47F. Iout0.5mA The exception to this is at low output current. CL=0.22mF Cin=0.22mF 0.1mF 0.1mF Cn=0.01mF The input capacitor is necessary when the battery is discharged, the power supply impedance increases, or the line distance to the power supply is long. This capacitor might be necessary on each individual IC even if two or more regulator ICs are used. It is not possible to determine this indiscriminately. Please confirm the stability while mounted. The IC provides stable operation with an output side capacitor of 0.22mF (Vout2.0V). If it is 0.1mF or more over the full range of temperature, either a ceramic capacitor or tantalum capacitor can be used without considering ESR. Stable operation area vs. voltage, current, and ESRat 100kHz Vout=2.1V-2.5V Vout=2.6V-3.5V 100 10 Stable Area CL=0.1uF CL=0..1uF ESR [] Stable Area 1 1 0.1 0.01 0 50 Iout 0.01 150 100 [mA] 10 Stable Area CL=0.1uF 1 0.1 0.1 0.01 0 50 Iout 100 [mA] 150 Vout=4.6V-5.0V 100 100 ESR [] 10 ESR [] 10 Vout=3.6V-4.5V 100 ESR [] 100 10 Stable Area Stable Area CL=0.1uF CL=0.1uF ESR [] Vout=1.5V-2.0V 1 1 0.1 0 50 Iout 100 [mA] 150 0.1 0.01 0 50 Iout 100 [mA] 150 0.01 0 50 Iout 100 [mA] 150 All Stable CL0.47mF All Stable CL1.0mF Please increase the output capacitor value when the load current is 0.5 mA or less. The stability of the regulator improves if a big output side capacitor is used (the stable operation area extends.) Low Voltage device: Please increase the output capacitor like 1.0mF when the load current is used by 0.5mA or less. For evaluation KYOCERA MURATA CM05B104K10ABCM05B224K10ABCM105B104K16ACM105B224K16ACM21B225K10A GRM36B104K10GRM42B104K10 GRM39B104K25GRM39B224K10GRM39B105K6.3 Please increase the output capacitor to 1.0mF when the load current is 0.5mA or less. Bias Voltage and Temperature Characteristics of Ceramic Capacitor 100 90 80 70 60 50 Capacitance vs. Voltage % B Curve F Curve 0 2 4 6 8 Bias voltageV 10 % Capacitance vs. Temperature 100 90 80 70 60 50 CAP CAP Generally, a ceramic capacitor has both a temperature characteristic and a voltage characteristic. Please consider both characteristics when selecting the part. The B curves are the recommended characteristics. -50 GC3-H006F B Curve F Curve -25 0 25 50 Ta() 75 100 Page 20 TK717xxS 11-2. Board Layout MaterialGrass epoxy 20x20mm t=0.8mm Vout TK717xx Vin onoff Pd(m) 500 -4.0mW/ Mounted GND Free Air N.pass 0 0 25 50 100 (85) 150 Pd=500 mW when mounted as recommended. Derate at 4.0 mW/C for operation above 25C. The thermal resistance is (ja=250/W). The heat loss of A and B are done in total. The package loss is limited at the temperature that the internal temperature sensor works (about 150). Therefore, the package loss is assumed to be an internal limitation. There is no heat radiation characteristic of the package unit assumed because of the small size. Heat is carried away by the device being installed on the PCB. This value changes by the material and the copper pattern etc. of the PCB. Enduring losses of about 500mW becomes possible in a lot of applications operating at 25. Determining the thermal resistance when mounted on a PCB. The operating chip junction temperature is shown by Tj=jaxPd+Ta. Tj of IC is set to about 150. Pd is a value when the overtemperature sensor is made to work. Ta (Ta=25 150jaxPd25 jaxPd125 ja (125/Pd) (/m) Pd is easily obtained. Mount the IC on the print circuit board. Short between the output pin and ground. after that, raise input voltage from 0V to evaluated voltage (see*1) gradually. At shorted the output pin, the power dissipation PD can be expressed as Pd=Vin Iin. The input current decreases gradually as the temperature of the chip becomes high. After a while, it reaches the thermal equilibrium. Use this currrent value at the thermal equilibrium. In almost all the cases, it shows 500mW(SOT235) or more. *1 In the case that the power, Vin Ishort (Short Circuit Current), becomes more than twice of the maximum rating of its power dissipation in a moment, there is a possibility that the IC is destroyed before internal thermal protection works. Pd is obtained by the normal temperature degrees. The current that can be used at the highest operating temperature is obtained from the graph of the figure below. Procedure (Do when PCB mounted). 1. Pd is obtained (VinxIin when the output side is short-circuited). 2. Pd is plotted on the horizontal line to 25. 3. Pd is connected with the point of 150 by the straight line (bold face line). 4. A line is extended vertically above the point of the use temperature in the design. For instance, 75 is assumed (broken line). 5. Extend the intersection of the derating curve (fat solid line) and (broken line) to the left and read the Pd value. 6.DPd/(VinmaxVout)=Iout (at 75) Pd(m) 2 Pd DPd 5 3 4 25 50 (75) 100 150 The maximum current that can be used at the highest operating temperature is:Iout DPd/(VinmaxVout). When (VinmaxVout) is small, a lot of Iout is calculated. However, use that exceeds IoutMax cannot be done. GC3-H006F Page 21 TK717xxS 11-3. On/Off control It is recommended to turn the regulator Off when the circuit following the Vsat regulator is non-operating. A design with a little electric power loss can be implemented. We recommend the use of the on/off control of the regulator REG without using a high side switch to provide an output from the regulator. A On/Off Cont. highly accurate output voltage with low voltage drop is obtained. Auto discharge circuit This circuit operates during off. Please do not connect the battery, the power supply, or other regulators to the output side. The charge of the output side capacitor chiefly passes through the automatic output side Vin TK717xxS On/Off Vout discharge circuit of the regulator during off. For this function It is not possible to operate by connecting two or more regulators with different voltages to the output side of the IC. Because the control current is small, it is possible to control it directly by CMOS logic. The PULLDOWN resistance is not built into the control terminal. The noise and the ripple rejection characteristics depend on the capacitance on the Vref terminal. The ripple rejection characteristic of the low frequency region improves by increasing the capacitance of Cnp. A standard value is Cnp=0.01mF. Increase Cnp in a design with important output noise and ripple rejection requirements. The IC will not be damaged if the capacitor value is increased. GC3-H006F Page 22 TK717xxS 11-4. Definition of term Output Voltage (Vout) The output voltage is specified with Vin=(VoutTYP+1V) and Iout=5mA. Maximum Output Current (Iout MAX) The rated output current is specified under the condition where the output voltage drops 0.3V the value specified with Iout=5mA. The input voltage is set to VoutTYP+1V and the current is pulsed to minimize temperature effect. Dropout Voltage (Vdrop) The dropout voltage is the difference between the input voltage and the output voltage at which point the regulator starts to fall out of regulation. Below this value, the output voltage will fall as the input voltage is reduced. It is dependent upon the load current and the junction temperature. Line Regulation (LinReg) Line regulation is the ability of the regulator to maintain a constant output voltage as the input voltage changes. The line regulation is specified as the input voltage is changed from Vin=VoutTYP+1V to Vin=VoutTYP+6V. It is a pulse measurement to minimize temperature effect. Load Regulation (LoaReg) Load regulation is the ability of the regulator to maintain a constant output voltage as the load current changes. It is a pulsed measurement to minimize temperature effects with the input voltage set to Vin=VoutTYP+1V. The load regulation is specified output current step conditions of 5mA to 100mA and 5mA to 200mA. Over Current Sensor The over current sensor protects the device when there is excessive output current. It also protects the device if the output is accidentally connected to ground. Thermal Sensor The thermal sensor protects the device in case the junction temperature exceeds the safe value (TJ=150C). This temperature rise can be caused by external heat, excessive power dissipation caused by large input to output voltage drops, or excessive output current. The regulator will shut off when the temperature exceeds the safe value. As the junction temperatures decrease, the regulator will begin to operate again. Under sustained fault conditions, the regulator output will oscillate as the device turns off then resets. Damage may occur to the device under extreme fault. Please reduce the loss of the regulator when this protection operate, by reducing the input voltage or make better heat efficiency. * In the case that the power, Vin Ishort(Short Circuit Current), becomes more than twice of the maximum rating of its power dissipation in a moment, there is a possibility that the IC is destroyed before internal thermal protection works. ESD MM: 200pF 0W 200V or more HBM: 100pF 1.5kW 2000V or more Ripple Rejection (R.R) Ripple rejection is the ability of the regulator to attenuate the ripple content of the input voltage at the output. It is specified with 200mVrms, 1kHz super-imposed on the input voltage, where Vin=Vout+1.5V. Ripple rejection is the ratio of the ripple content of the output vs. input and is expressed in dB. Standby Current (Istandby) Standby current is the current, which flows into the regulator when the output is turned off by the control function (Vcont=0V). GC3-H006F Page 23 TK717xxS 12. PACKAGE OUTLINE SOT23-5 Voltage Code Mark 0.7 4 1.0 5 2.4 1.6 0.2 xxK 3 1 0.95 +0.10 0.95 0.4 -0.05 0.95 0.95 Reference Mount Pad 0.1 M 0.1 (0.3) 0.15 +0.10 -0.05 1.1 0.1 0 ~0.1 1.3max 2.9 0.2 2.8 0.2 Unit : mm Package Structure Package Material : Epoxy Resin Terminal Material : Copper Alloy Mass (Reference) : 0.016g OUT V CODE OUT 1.5 v 15 2.5 v 1.6 16 2.6 1.7 17 2.7 1.8 18 2.8 1.9 19 2.9 2.0 20 3.0 2.1 21 3.1 2.2 22 3.2 2.3 23 3.3 2.4 24 3.4 V CODE 25 26 27 28 29 30 31 32 33 34 OUT 3.5 v 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 GC3-H006F V CODE 35 36 37 38 39 40 41 42 43 44 OUT 4.5 v 4.6 4.7 4.8 4.9 5.0 V CODE 45 46 47 48 49 50 Page 24 TK717xxS 13. NOTES 14. OFFICES Please be sure that you carefully discuss your planned purchase with our office if you intend to use the products in this application manual under conditions where particularly extreme standards of reliability are required, or if you intend to use products for applications other than those listed in this application manual. Power drive products for automobile, ship or aircraft transport systems; steering and navigation systems, emergency signal communications systems, and any system other than those mentioned above which include electronic sensors, measuring, or display devices, and which could cause major damage to life, limb or property if misused or failure to function. Medical devices for measuring blood pressure, pulse, etc., treatment units such as coronary pacemakers and heat treatment units, and devices such as artificial organs and artificial limb systems which augment physiological functions. Electrical instruments, equipment or systems used in disaster or crime prevention. If you need more information on this product and other ASAHI KASEI TOKO POWER DEVICES products, please contact us. ASAHI KASEI TOKO POWER DEVICES CORPORATION 13-45, Senzui 3-chome, Asaka-shi, Saitama-ken 351-0024, Japan TEL: +81-48-460-1870 (Marketing Department) FAX: +81-48-460-1600 Semiconductors, by nature, may fail or malfunction in spite of our devotion to improve product quality and reliability. We urge you to take every possible precaution against physical injuries, fire or other damages which may cause failure of our semiconductor products by taking appropriate measures, including a reasonable safety margin, malfunction preventive practices and fire-proofing when designing your products. This application manual is effective from Aug. 2010. Note that the contents are subject to change or discontinuation without notice. When placing orders, please confirm specifications and delivery condition in writing. ASAHI KASEI TOKO POWER DEVICES is not responsible for any problems nor for any infringement of third party patents or any other intellectual property rights that may arise from the use or method of use of the products listed in this application manual. Moreover, this application manual does not signify that ASAHI KASEI TOKO POWER DEVICES agrees implicitly or explicitly to license any patent rights or other intellectual property rights which it holds. None of the ozone depleting substances(ODS) under the Montreal Protocol are used in our manufacturing process. YOUR DISTRIBUTOR GC3-H006F Page 25