[TK705xxS/TK707xxS,TK706xxH/TK708xxH] TK705xxS/TK706xxH LDO Regulator IC 1-. DESCRIPTION 4-. PIN CONFIGURATION Output current: 100mA, Peak 200mA Active high on/off control Excellent Ripple rejection ratio: 80dB (f=1kHz) 70dB (f=10kHz) Output capacitance: Cout 0.47F(Ceramic) Output voltage accuracy: 1.5% or 50mV Short circuit protection (Over current protection) Internal thermal shutdown (Over heat protection) Reverse bias protection TK705xxS Vcont 1 GND 2 Np 3 5 Vin 4 Vout * SON2017-6 TK706xxH Vcont 1 GND 2 Np 3 Axx 2-. FEATURES Top View * SOT23-5 Axx TK705xxS and TK706xxH is a low dropout linear regulator with ON/OFF control, which can supply 100mA load current. The IC is an integrated circuit with a silicon monolithic bipolar structure. The output voltage, trimmed with high accuracy, is available from 1.5 to 5.0V in 0.1V steps. The packages are the small and thin SON2017-6, and the extremely versatile SOT23-5. The IC is designed for portable applications with space requirements, battery powered system and any electronic equipment. Two kinds of pin configuration can be selected for each package. The over current, over heat sensor and reverse bias over current protection circuits are built-in. ESD is also high, so it won't break easily. It is possible to use at ease. 6 Vin 5 GND 4 Vout *2pin,5pin are connected in the IC. 3-. APPLICATIONS Any Electronic Equipment Battery Powered Systems Mobile Communication AP-MS0027-E-00 -1- 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] 5-. PACKAGE OUTLINE SOT23-5 SON2017-6 M ark 0.7 0.95 +0.10 1 3 1.8 4 1.7 +0.2 0.1 0.95 0.4 0.05 0.65 0.95 0.65 Lot No. Reference Mount Pad +0.10 0.20 0.05 0.10 M 2.1 0.2 Reference M ount Pad M (0.2) 0.125 +0.10 0.05 0.1 (0.2) 0.75 0.10 0.95 0.6 6 2.4 1.6 0.2 1.0 Lead Free Mark 1 Pin Mark 3 1 0.3 Mark +0.2 2.0 0.1 4 5 0.1 3 6 4 (0.1) (0.3) 1 +0.10 0.05 0.15 1.1 0.1 0 ~0.1 1.3max 2.9 0.2 2.8 0.2 6-. BLOCK DIAGRAM Vin Vout Over Heat & Over Current Protection 500k 320k Control Circuit Vcont AP-MS0027-E-00 Bandgap Reference GND -2- Np 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] 7-. ABSOLUTE MAXIMUM RATINGS 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 ~ 150 460 *1 400 *2 V V V Reverse Bias VrevMAX Np pin Voltage Control pin Voltage Storage Temperature Range VnpMAX VcontMAX Tstg Power Dissipation PD C mW mW Conditions Vout 2.0V 2.1V Vout SOT23-5 SON2017-6 Operating Condition Operating Temperature Range TOP -40 ~ 85 C Operating Voltage Range VOP 2.1 ~ 14 V Short Circuit Current Ishort 200 mA Over Current Protection *1 : Internal Limited Tj=140C. PD must be decreased at rate of 4.0 mW/C for operation above 25C. *2 : Internal Limited Tj=140C. PD must be decreased at rate of 3.5 mW/C for operation above 25C. The maximum ratings are the absolute limitation values with the possibility of the IC breakage. When the operation exceeds this standard, quality cannot be guaranteed. 8-. ELECTRICAL CHARACTERISTICS The parameters with min. or max. values will be guaranteed at Ta=Tj=25C with test when manufacturing or SQC(Statistical Quality Control) methods. The operation between -40 ~ 85C is guaranteed when design. AP-MS0027-E-00 -3- 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] Vin=VoutTYP+1V,Vcont=1.8V,Ta=Tj=25C Output Voltage Line Regulation Load Regulation Vout LinReg LoaReg Dropout Voltage *1 Vdrop Output Current *2 Iout Value MIN TYP MAX Refer to TABLE 1 0.0 5.0 Refer to TABLE 1 Refer to TABLE 1 90 160 160 280 100 Peak Output Current *2 IoutPEAK 150 Quiescent Current Iq 75 120 Standby Current Ground Pin Current Control Terminal *3 Control Current Control Voltage Istandby Ignd 0.0 1.5 Icont Vcont 5.0 Parameter Symbol Units V mV mV mV mV mV mA Iout = 5mA mA A When (VoutTYP0.9) Iout = 0mA 0.1 2.7 A mA Vcont = 0V Iout = 50mA 15.0 A V V Vcont = 1.8V Vout ON state Vout OFF state 200 1.8 0.35 Reference Value Np Terminal Voltage Vnp Output Voltage / Temp. Vout/Ta 35 Output Noise Voltage (VoutTYP=3.0V) Vnoise 38 Vrms Ripple Rejection (VoutTYP=3.0V) R.R 80 dB 70 dB Rise Time (VoutTYP=3.0V) tr Conditions 1.26 35 Vin = 5V Iout = 5mA ~ 50mA Iout = 5mA ~ 100mA Iout = 50mA Iout = 100mA V ppm /C s Cout=1.0F, Cnp=0.01F Iout=30mA Cout=1.0F, Cnp=0.001F Iout=10mA, f=1kHz f=10kHz Cout=1.0F, Cnp=0.001F Vcont: Pulse Wave (100Hz) Vcont ON Vout95% point *1: For Vout 2.0V , no regulations. *2: The output current is limited by power dissipation. *3: The input current decreases to pA level when control terminal is connected to GND (Off state). General Note: Parameter with only typical value is for reference only. AP-MS0027-E-00 -4- 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] TABLE 1. Output Voltage, Load Regulation Load Regulation Output Voltage Part Number Iout = 50mA Iout = 100mA MIN TYP MAX TYP MAX TYP MAX V V V mV mV mV mV VoutTYP=1.3V ~ 2.0V TK70513SC TK70613HC 1.250 1.300 1.350 5.0 10.0 10.0 22.0 TK70514SC TK70614HC 1.350 1.400 1.450 5.0 10.0 10.0 23.0 TK70515SC TK70615HC 1.450 1.500 1.550 5.0 11.0 10.0 24.0 TK70516SC TK70616HC 1.550 1.600 1.650 5.0 11.0 11.0 25.0 TK70517SC TK70617HC 1.650 1.700 1.750 5.0 11.0 11.0 25.0 TK70518SC TK70618HC 1.750 1.800 1.850 5.0 12.0 11.0 26.0 TK70519SC TK70619HC 1.850 1.900 1.950 5.0 12.0 11.0 27.0 TK70520SC TK70620HC 1.950 2.000 2.050 5.0 12.0 12.0 28.0 TK70521SC TK70621HC 2.050 2.100 2.150 5.0 12.0 12.0 28.0 TK70522SC TK70622HC 2.150 2.200 2.250 6.0 13.0 12.0 29.0 TK70523SC TK70623HC 2.250 2.300 2.350 6.0 13.0 13.0 30.0 TK70524SC TK70624HC 2.350 2.400 2.450 6.0 13.0 13.0 31.0 TK70525SC TK70625HC 2.450 2.500 2.550 6.0 14.0 13.0 31.0 TK70526SC TK70626HC 2.550 2.600 2.650 6.0 14.0 14.0 32.0 TK70527SC TK70627HC 2.650 2.700 2.750 6.0 14.0 14.0 33.0 TK70528SC TK70628HC 2.750 2.800 2.850 6.0 14.0 14.0 34.0 TK70529SC TK70629HC 2.850 2.900 2.950 6.0 15.0 15.0 34.0 TK70530SC TK70630HC 2.950 3.000 3.050 6.0 15.0 15.0 35.0 TK70531SC TK70631HC 3.050 3.100 3.150 7.0 15.0 15.0 36.0 TK70532SC TK70632HC 3.150 3.200 3.250 7.0 15.0 16.0 37.0 TK70533SC TK70633HC 3.250 3.300 3.350 7.0 16.0 16.0 37.0 TK70534SC TK70634HC 3.349 3.400 3.451 7.0 16.0 16.0 38.0 TK70535SC TK70635HC 3.447 3.500 3.553 7.0 16.0 16.0 39.0 TK70536SC TK70636HC 3.546 3.600 3.654 7.0 17.0 17.0 40.0 TK70537SC TK70637HC 3.644 3.700 3.756 7.0 17.0 17.0 40.0 TK70538SC TK70638HC 3.743 3.800 3.857 7.0 17.0 17.0 41.0 TK70539SC TK70639HC 3.841 3.900 3.959 8.0 17.0 18.0 42.0 TK70540SC TK70640HC 3.940 4.000 4.060 8.0 18.0 18.0 43.0 VoutTYP=2.1V ~ 3.0V VoutTYP=3.1V ~ 4.0V AP-MS0027-E-00 -5- 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] TABLE 1. Output Voltage, Load Regulation (continue) Load Regulation Output Voltage Part Number Iout = 50mA Iout = 100mA MIN TYP MAX TYP MAX TYP MAX V V V mV mV mV mV VoutTYP=4.1V ~ 5.0V TK70541SC TK70641HC 4.038 4.100 4.162 8.0 18.0 18.0 43.0 TK70542SC TK70642HC 4.137 4.200 4.263 8.0 18.0 19.0 44.0 TK70543SC TK70643HC 4.235 4.300 4.365 8.0 18.0 19.0 45.0 TK70544SC TK70644HC 4.334 4.400 4.466 8.0 19.0 19.0 46.0 TK70545SC TK70645HC 4.432 4.500 4.568 8.0 19.0 20.0 46.0 TK70546SC TK70646HC 4.531 4.600 4.669 8.0 19.0 20.0 47.0 TK70547SC TK70647HC 4.629 4.700 4.771 8.0 20.0 20.0 48.0 TK70548SC TK70648HC 4.728 4.800 4.872 9.0 20.0 21.0 49.0 TK70549SC TK70649HC 4.826 4.900 4.974 9.0 20.0 21.0 49.0 TK70550SC TK70650HC 4.925 5.000 5.075 9.0 20.0 21.0 50.0 AP-MS0027-E-00 -6- 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] 9-. TEST CIRCUIT 9-1-. TK705xxS/TK706xxH TK705xxS (SOT23-5) 5 4 Vin Iin A Vin GND Vout Vcont Vin Vout Cin Cout Iout 1 Vout GND 2 Np 3 V 1.0F Vcont GND Np 1.0F TK706xxH (SON2017-6) 6 5 4 Vin GND Vout Vcont GND Np Icont A Vcont Cnp 0.001F 1 2 3 *2pin and 5pin are connected in the IC. AP-MS0027-E-00 -7- 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] 10-. TYPICAL CHARACTERISTICS 10-1--1. DC CHARACTERISTICS Line Regulation Test conditions Vin =VoutTYP+1V Vin Cin 1.0F Vout Vcont Iout=0mA Iin (mA) Quiescent Current Iout=0mA 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 Cout 1.0F Np Vcont 1.8V Iin vs Vin Iout=5mA Cnp 0.001F Vout= 1.5,2.0,3.0,4.0,5.0V 0 2 4 6 8 10 12 14 16 Vin (V) Peak Output Current Vout (V) Load Regulation 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 Vout= 5.0V 4.0V 3.0V 2.0V 1.5V 0 50 100 150 200 250 300 Iout (mA) AP-MS0027-E-00 -8- 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] Ignd (mA) GND Pin Current Test conditions Vin =VoutTYP+1V 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 Vin Cin 1.0F Vout Vcont 50 Cout 1.0F Np Vcont 1.8V 0 Iout=5mA Cnp 0.001F 100 Iout (mA) Dropout Voltage Standby Current (Off state) 2.1V VoutTYP Vcont=0V 1.E-06 0 -20 1.E-07 Istanby (A) Vdrop (mV) -40 -60 -80 -100 -120 1.E-08 1.E-09 1.E-10 -140 1.E-11 -160 0 50 0 100 Iout (mA) Control Current AP-MS0027-E-00 2 4 6 8 10 12 14 16 Vin (V) Control Current, ON/OFF Point -9- 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] Vout vs Vin 2.1V VoutTYP Regulation Point Test conditions Vin =VoutTYP+1V Vin Cin 1.0F Vout Vcont Cout 1.0F Np Vcont 1.8V Vout vs Vin Vout vs Vin Regulation Point 1.54 1.52 1.50 1.48 1.46 1.44 1.42 1.40 1.38 1.36 1.34 Cnp 0.001F Regulation Point VoutTYP=2.0V Iout=0,50,100mA Vout (V) Vout (V) VoutTYP=1.5V Iout=5mA 1.5 1.6 1.7 1.8 1.9 2.04 2.02 2.00 1.98 1.96 1.94 1.92 1.90 1.88 1.86 1.84 Iout=0,50,100mA 1.8 2.0 1.9 Vin (V) Reverse Bias Current 2.0 2.1 2.2 2.3 Vin (V) Test conditions Vin=0V, Vcont=0V Vin=0V Vin Cin 1.0F Vcont Vcont 0V AP-MS0027-E-00 - 10 - Irev Vout Cout 1.0F Np Vrev Cnp 0.001F 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] 11-1-2. Temperature Characteristics Vout Test conditions VoutTYP=3.0V Vin =VoutTYP+1V 20 Vin Vout Iout=5mA Vout (mV) 10 Cin 1.0F 0 Vcont Cout 1.0F Np -10 -20 Vcont 1.8V 35.15 ppm/ Cnp 0.001F -30 -40 -40 -20 0 20 40 60 80 100 T a Peak Output Current GND Pin Current Vout=VoutTYP 0.9 250 6.0 200 5.0 Ignd(mA) IoutPEAK(mA) Iout=100mA Iout=50mA Iout=30mA 7.0 150 100 4.0 3.0 2.0 50 1.0 0.0 0 -40 -20 0 20 40 60 -40 -20 80 100 20 40 60 80 100 T a(C) Ta() Dropout Voltage Quiescent Current 2.1V VoutTYP Vdrop(mV) 0 Iout=0mA 300 Iout=100mA Iout=50mA 250 Iout=30mA 200 150 100 50 0 -40 -20 0 20 40 60 80 100 T a(C) AP-MS0027-E-00 - 11 - 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] Test conditions Vin =VoutTYP+1V Cin 1.0F Vin Vout Vcont Iout=5mA Cout 1.0F Np Vcont 1.8V Load Regulation Line Regulation VoutTYP=3.0V Vin = 5V Cnp 0.001F 20 0 15 -10 LinReg(mV) LoaReg(mV) 10 -20 Iout=30mA -30 Iout=50mA -40 Iout=100mA 5 0 -5 -10 -50 -15 -20 -60 -40 -20 0 20 40 60 80 -40 -20 100 0 40 60 80 100 60 80 100 T a() T a() ON/OFF Point Vcont(V) Control Current 20 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 Vout_ON Vout_OFF -40 -20 0 20 40 T a AP-MS0027-E-00 - 12 - 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] 10-2-. AC CHARACTERISTICS (VoutTYP=3.0V) Ripple Rejection Cout=0.22F, 0.47F, 1.0F, 2.2F Test conditions Vripple Vin(DC)=VoutTYP+1.5V 200mVp-p Cout=0.22F 0.47F 1.0F 2.2F Vin f=100Hz 1MHz Vcont Vout Iout=10mA Cout 1.0F Np Vcont 1.8V Cnp 0.001F Iout=10mA, 20mA, 50mA, 100mA Cnp=0.00F, 0.01F, 0.1F Iout=100mA 50mA 20mA 10mA Cnp=0.001F Cnp=0.01F 0.1F R.R vs Low Vin : Frequency=1kHz 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 Ripple Rejection (dB) Ripple Rejection (dB) R.R vs Iout : Frequency=1kHz 0 20 40 60 80 100 Iout=100mA Iout=50mA Iout=20mA Iout=10mA Iout=1mA 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 0 Iout (mA) 0.2 0.4 0.6 0.8 1 Vin-Vout(Typ) (V) The ripple rejection (R.R) characteristic depends on the characteristic and the capacitance of the capacitor connected at the output side. Also it depends on the output voltage. The R.R characteristic at 50kHz or more varies greatly with the capacitor on the output side and PCB pattern. If necessary, please check stability during operation. AP-MS0027-E-00 - 13 - 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] ON/OFF Transient Test conditions Vin =VoutTYP+1V Voltage Vcont Cin 1.0F Rise Time Vin Vcont Vout Cout 1.0F Np Vcont=0V2V (f=100Hz) Voutx95% Vout Iout=30mA Cnp 0.001F Time Cout=0.47F, 1.0F, 2.2F Cout=0.47F, 1.0F, 2.2F Cnp=0.001F, 0.01F, 0.1F The rise time of the regulator depends on Cout and Cnp. The fall time depends on Cout. AP-MS0027-E-00 - 14 - 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] LOAD Transient Test conditions Vin =VoutTYP+1V Cin 1.0F Vin Vcont Vcont 1.8V Iout ONOFF Vout Cout 1.0F Np Cnp 0.001F Iout=0100mA, 5105mA Iout=100mA0mA, 105mA5mA Cout=0.47F, 1.0F, 2.2F : Iout=0mA100mA Cout=0.47F, 1.0F, 2.2F : Iout=100mA0mA Increase the load side capacitor when the load change is fast or when there is a large current change. In addition, at no load, supplying small load current to ground can reduce the voltage change. AP-MS0027-E-00 - 15 - 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] LINE Transient Cnp=0.001F, 0.01F, 0.1F Test conditions Vin =VoutTYP+1V+2V Vin Vcont Vcont 1.8V Cout=0.1F, 0.22F, 0.47F AP-MS0027-E-00 Vout Iout=30mA Cout 1.0F Np Cnp 0.001F Cout=1.0F, 2.2F - 16 - 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] Output Noise Characteristics Vout vs Noise Test conditions Vin =VoutTYP+1V 80 Vin Noise (uVrms) 70 60 Cin 1.0F 50 Vcont Vout Iout=30mA Cout 1.0F Np 40 Vcont 1.8V 30 20 10 Cnp 0.01F BPF=400Hz 80kHz 0 1.0 2.0 3.0 4.0 5.0 Vout(Typ) (V) Cnp vs Noise Iout vs Noise Cout=0.22uF 300 Cout=0.47uF Cout=1.0uF Noise (uVrms) Noise (uVrms) 250 200 Cout=2.2uF 150 100 50 0 1p 10p Cout=0.22uF 70 65 60 55 50 45 40 35 30 25 20 Cout=0.47uF Cout=1.0uF Cout=2.2uF 0 100p 1000p 0.01u 0.1u 20 40 60 80 100 Iout (mA) Cnp (F) Increase Cnp to decrease the noise. The recommended Cnp capacitance is 0.01F 0.1F. The amount of noise increases with the higher output voltages. AP-MS0027-E-00 - 17 - 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] 11-. PIN DESCRIPTION Pin No. TK705xxS : 1 TK706xxH : 1 Pin Description Vcont Internal Equivalent Circuit Vcont Description On/Off Control Terminal VCONT > 1.8V : ON VCONT < 0.35V : OFF 320k The pull-down resister (500k) is built-in. 500k TK705xxS : 2 TK706xxH : 2,5 GND TK705xxS : 3 TK706xxH : 3 Np GND Terminal Noise Bypass Terminal Np Connect a bypass capacitor between GND. TK705xxS : 4 TK706xxH : 4 Vout Vout Output Terminal Vin Vref TK705xxS : 5 TK706xxH : 6 AP-MS0027-E-00 Vin Input Terminal - 18 - 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] 12-. APPLICATIONS INFORMATION 12-1-. Definition of Technical Terms Relating Characteristic Note Each characteristics will be measured in a short period not to be influenced by joint temperature (Tj). Output voltage (Vout) The output voltage is specified with Vin= VoutTYP+1V and Iout=5mA Output current (Iout) Output current, which can be used continuously (It is the range where overheating protection of the IC does not operate.) Peak maximum output current (IoutPEAK) The rated output current is specified under the condition where the output voltage drops 90% by increasing the output current, compared to the value specified at Vin=VoutTYP+1V. Dropout voltage (Vdrop) It is an I/O voltage difference when the circuit stops the stable operation by decreasing the input voltage. It is measured when the output voltage drops 100mV from its nominal value by decreasing the input voltage gradually. Line Regulation (LinReg) It is the fluctuations of the output voltage value when the input voltage is changed. Relating Protection Circuit Over Current Protection It is a function to protect the IC by limiting the output current when excessive current flows to IC, such as the output is connected to GND, etc. Thermal Protection It protects the IC not to exceed the permissible power consumption of the package in case of large power loss inside the regulator. The output is turned off when the chip reaches around 140C, but it turns on again when the temperature of the chip decreases. Reverse Voltage Protection Reverse voltage protection prevents damage due to the output voltage being higher than the input voltage. This fault condition can occur when the output capacitor remains charged and the input is reduced to zero, or when an external voltage higher than the input voltage is applied to the output side Generally, a LDO regulator has a diode in the input direction from an output. If an input falls from an output in an input-GND short circuit etc. and this diode turns on, current will flow for an input terminal from an output terminal. In the case of excessive current, IC may break. In order to prevent this, it is necessary to connect an Schottky Diode etc. outside. This product is equipped with reverse bias over-current prevention, and excessive current does not flow in to IC. Therefore, no need to connect diode outside. Load Regulation (LoaReg) It is the fluctuations of the output voltage value when the input voltage is assumed to be VoutTYP +1V, and the load current is changed. 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 measured with the condition of Vin=Vout+1.5V. Ripple rejection is the ratio of the ripple content between the output vs. input and is expressed in dB. Vin ESD It is tested by connecting charged capacitor to GND pin and Vin pin. Standby current (Istandby) It is an input current, which flows to the control terminal, when the IC is turned off. AP-MS0027-E-00 Vout MM 200pF 0 200Vmin HBM 100pF 1.5k 2000Vmin - 19 - 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] 12-2-. ESR Stability Linear regulators require input and output capacitors in order to maintain the regulator's loop stability. If 0.22F or larger capacitor is connected to the output side, the IC provides stable operation at any voltage (1.3VVoutTYP5.0V). (The capacitor must be larger then 0.22F at all temperature and voltage range) If the capacitor with high Equivalent Series Resistance (ESR) (several ohms) is used, such as tantalum capacitor etc., the regulator may oscillate. Please select parts with low ESR. Due to the parts are uneven, please enlarge the capacitance as much as possible. With larger capacity, the output noise decreases more. In addition, the response to the load change, etc. can be improved. The IC won't be damaged by enlarging the capacity. A recommended value of the application is as follows. Cin=Cout0.47F Ceramic Capacitance Fig.13-1 TK705xxS TK705xxS TK707xxS TK706xxH TK706xxH TK708xxH Vin Cin0.47F Vout Fig.13-2 shows stable operation with a ceramic capacitor of 0.22F. Since it may oscillate if ESR is large, we recommend using ceramic capacitor. The stability of the regulator improves with larger output capacitor (the stable operation area extends.) Please use the capacitor with larger capacitance as possible. For evaluation Kyocera: CM05B104K10AB, CM05B224K10AB, CM105B104K16A, CM105B224K16A, CM21B225K10A Murata: GRM36B104K10, GRM42B104K10, GRM39B104K25, GRM39B224K10, GRM39B105K6.3 The input capacitor is necessary in case the battery voltage drops, the power supply impedance increases, or the distance to the power supply is far. 1 input capacitor might be necessary for each IC or for several ICs. It depends on circuit condition. Please confirm the stability by each circuit. Cout0.47F Fig.13-3 ex. Ceramic Capacitance vs. Voltage, Temperature Cnp 0.001F GND Fig.13-2 Output Voltage, Output Current vs.Stable Operation Area Cout=0.1F Cout=0.22F 100 Unstable area ESR () 10 1 S table area 0.1 Unstable area 0.01 0 20 40 60 80 100 Iout (mA) Generally, a ceramic capacitor has both temperature characteristic and voltage characteristic. Please consider both characteristics when selecting the part. The B curves are the recommend characteristics. 1.5V VoutTYP 5.0V AP-MS0027-E-00 - 20 - 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] 12-3-. Operating Region and Power Dissipation The power dissipation of the device depends on the junction temperature. Therefore, the package dissipation is assumed to be an internal limitation. The package itself does not have enough heat radiation characteristic due to the small size. Heat runs away by mounting IC on PCB. This value changes by the material, copper pattern etc. of PCB. The overheating protection operates when there is a lot of loss inside the regulator (Ambient temperature high, heat radiation bad, etc.). The output current and the output voltage will drop when the protection circuit operates. When joint temperature (Tj) reaches the set temperature, IC stops the operation. However, operation begins at once when joint temperature (Tj) decreases. Method of obtaining Pd easily Connect output terminal to GND(short circuited), and measure the input current by increasing the input voltage gradually up to 10V. The input current will reach the maximum output current, but will decrease soon according to the chip temperature rising, and will finally enter the state of thermal equilibrium (natural air cooling). The input current and the input voltage of this state will be used to calculate the Pd. Pd(mW) Vin (V) Iin (mA) When the device is mounted, mostly achieve TK705xxS (SOT23-5): 580mW or more TK706xxH (SON2017-6): 500mW or more The thermal resistance when mounted on PCB * In case that the power, Vin Ishort(Short Circuit Current), becomes more than the maximum rating of its power dissipation, the IC may damaged before internal thermal protection works. The chip joint temperature during operation is shown by Tj=jaxPd+Ta. Joint part temperature (Tj) of TK705xxS /TK706xxH is limited around 140C with the overheating protection circuit. Pd is the value when the overheating protection circuit starts operation. Pd(mW) 2 Pd When you assume the ambient temperature to be 25C, 140= ja Pd(W)+25 ja Pd=115 ja=115/Pd (C /W) D Pd 5 3 4 Example of mounting substrate 0 0 25 50 75C Ta(C) 100 140C Procedure (When mounted on PCB). PCB Material: Two layer glass epoxy substrate (x=30mm,y=30mm,t=1.0mm,Copper pattern thickness 35um) TK705xxS (SOT23-5) Please do the derating with 5.9mW/C at Pd=677mW and 25C or higher. Thermal resistance ( ja) is 170C/W. TK706xxH (SON2017-6) Please do the derating with 4.9mW/C at Pd=560mW and 25C or higher. Thermal resistance ( ja) is 205C/W. AP-MS0027-E-00 1.Find Pd (VinIin when the output is short-circuited). 2. Plot Pd against 25C. 3. Connect Pd to the point corresponding to the 140C with a straight line. 4. Pull a vertical line from the maximum operating temperature in your design (e.g., 75C). 5. Read the value of Pd against the point at which the vertical line intersects the derating curve(DPd). 6.DPd(Vinmax-Vout)=Iout (at 75C) The maximum output current at the highest operating temperature will be Iout DPd (Vinmax-Vout). Please use the device at low temperature with better radiation. The lower temperature provides better quality. - 21 - 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] 12-4-. ON/OFF Control 12-6-. The notes of the evaluation when output terminal is short-circuit to GND It is recommended to turn the regulator off when the circuit following the regulator is not operating. A design with small electric power loss can be implemented. Because the control current is small, it is possible to control it directly by CMOS logic. Control Terminal Voltage (Vcont) Vcont > 1.8V Vcont < 0.35V ON/OFF State ON OFF Parallel Connected ON/OFF Control Fig.13-4 Vout 5V TK70550S Vin By the resonance phenomenon by Cout (C ingredient) and the short circuit line (L ingredient), which are attached to an output terminal, an output terminal changes with minus potential. In order that Parasitism Tr arises within Bip IC, and a latch rise phenomenon may occur within IC when the worst if it goes into an output terminal's minus side, it results in damage by fire (white smoke) and breakage of a package. (f0 = 1 / 2 (L C)) The above-mentioned resonance phenomenon appears notably in a ceramic capacitor with the small ESR value, etc. A resonance phenomenon can be reduced by connecting resistance (around 2ohms or more) in series with a short circuit line. Thereby, the latch rise phenomenon within IC can be prevented. Generally, when using tantalum or large electrolysis capacitor, the influence of resonance phenomenon can be reduced due to the large ESR (2ohms or more). 3.3V TK70533S R 2.0V TK70520S On/Off Cont. Fig.13-4 shows the multiple regulators being controlled by a single ON/OFF control signal. There is fear of overheating, because the power loss of the low voltage side (TK70520S) is large. The series resistor (R) is put in the input line of the low output voltage regulator in order to prevent over-dissipation. The voltage dropped across the resistor reduces the large input-to-output voltage across the regulator, reducing the power dissipation in the device. When the thermal sensor works, a decrease of the output voltage, oscillation, etc. may be observed. 12-5-. Noise Bypass The noise characteristics depend on the capacitance on the Np terminal. A standard value is Cnp=0.001F. Increase Cnp in a design with important output noise requirements. The IC will not be damaged even the capacitor value is increased. The on/off switching speed changes depending on the Np terminal capacitance. The switching speed slows when the capacitance is large. AP-MS0027-E-00 - 22 - 2011/02 [TK705xxS/TK707xxS,TK706xxH/TK708xxH] IMPORTANT NOTICE These products and their specifications are subject to change without notice. When you consider any use or application of these products, please make inquiries the sales office of Asahi Kasei Microdevices Corporation (AKM) or authorized distributors as to current status of the products. Descriptions of external circuits, application circuits, software and other related information contained in this document are provided only to illustrate the operation and application examples of the semiconductor products. You are fully responsible for the incorporation of these external circuits, application circuits, software and other related information in the design of your equipments. AKM assumes no responsibility for any losses incurred by you or third parties arising from the use of these information herein. AKM assumes no liability for infringement of any patent, intellectual property, or other rights in the application or use of such information contained herein. Any export of these products, or devices or systems containing them, may require an export license or other official approval under the law and regulations of the country of export pertaining to customs and tariffs, currency exchange, or strategic materials. AKM products are neither intended nor authorized for use as critical components Note1) in any safety, life support, or other hazard related device or systemNote2), and AKM assumes no responsibility for such use, except for the use approved with the express written consent by Representative Director of AKM. As used here: Note1) A critical component is one whose failure to function or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of performance and reliability. Note2) A hazard related device or system is one designed or intended for life support or maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property. It is the responsibility of the buyer or distributor of AKM products, who distributes, disposes of, or otherwise places the product with a third party, to notify such third party in advance of the above content and conditions, and the buyer or distributor agrees to assume any and all responsibility and liability for and hold AKM harmless from any and all claims arising from the use of said product in the absence of such notification. AP-MS0027-E-00 - 23 - 2011/02