ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter ■General description ELM92xxxx is CMOS PWM step-up DC/DC converter which consists of reference voltage source, error amplifier, oscillation circuit, start-up circuit, output voltage setting resistor, LX transistor and switching current limiter. For external parts, coil, diode and capacitor are possible choices; with external parts, ELM92 series is able to acquire constant output voltage higher than input voltage. The standard output voltages are 2.7V, 3.0V, 3.3V, and 5.0V; ELM92 series can also be designed as semi-custom IC within the range of 2.5V to 5.5V by 0.1V step. Meanwhile, 600kHz high frequency PWM control scheme makes it easy to design DC/DC converter which can generate large output current with high stability and small ripples by only using small external inductor. With newly developed intermittent operation control scheme, ELM92 series is able to work with high efficiency under wide range of load conditions. ■Features ■Application • • • • • • Constant voltage source for battery-operated devices • Constant voltage source for PDAs, cameras, portable communications equipments and videos • Local regulator Output voltage range : 2.5V to 5.5V (by 0.1V) Low voltage operation : Vin≥0.9V Oscillating frequency : Typ.600kHz Output current(e.g.) : 250mA(Vin=1.5V, Vout=3.0V) CE(Chip-enable pin) available : Max.0.5μA(ELM92xx2x Iss at shutdown) • High efficiency : Typ.85% • Switching current limiter • Package : SOT-89, SOT-89-5 ■Maximum absolute ratings Parameter Apply voltage to LX pin Apply voltage to VOUT pin Apply voltage to CE pin Power dissipation Symbol Vlx Vout Vce Limit Vss-0.3 to 8.0 Vss-0.3 to 8.0 Vss-0.3 to 8.0 500 (SOT-89) 500 (SOT-89-5) -40 to +85 -55 to +125 Pd Operating temperature Storage temperature Top Tstg Unit V V V mW °C °C ■Selection guide ELM92xxxx-x Symbol a, b Output voltage c CE selection d Package e Taping direction e.g. : 27: Vout=2.7V 30: Vout=3.0V 33: Vout=3.3V 50: Vout=5.0V 1: No CE type (SOT-89) 2: CE type (SOT-89-5) B: SOT-89, SOT-89-5 S: Refer to PKG file N: Refer to PKG file 14 - 1 ELM92 x x x x - x ↑ ↑ ↑ ↑ ↑ a b c d e ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter ■Pin configuration SOT-89(TOP VIEW) SOT-89-5(TOP VIEW) � � � Pin No. 1 2 3 � � � Pin name VOUT VSS LX � Pin No. 1 2 3 4 � Pin name VOUT VSS LX NC CE ("H"=active, "L"=shutdown) 5 ■Standard circuit • ELM92xx1x • ELM92xx2x ����� ����� ����� ����� ��� ��� �� ��������� � ��� ���� ���� � ��� ���� ��� � ���� ��� ���� ���� �� �� ��������� ����������������������� ��������� � ��������� � � � ���� �� �� ��������� �� ��� ���������� ��������� ��������� ������������������ ��� 14 - 2 ������������� ������ ������� ������� ���� � ��� ■Block diagram ���� ���� ���� ���� ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter ■Electrical characteristics (ELM92xx1x) Vout=2.7V(ELM92271x) Parameter Input voltage Starting voltage Output voltage1 Output voltage2 Current consumption1 Current consumption2 Oscillating frequency Duty ratio Frequency of intermittent control On-resistance of LX switch Leakage current of LX switch L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C Symbol Condition Min. Typ. Max. Unit Note Vin 7 V Vst No-load 0.9 V 1 Vout1 Iout=60mA, Vin=1.5V 2.633 2.700 2.767 V 1 Vout1 Vout1 Vout1 Vout2 Iout=0.1mA, Vin=1.5V V 1 ×1.005 ×1.010 ×1.020 Iss1 Vout=Vout(T)×0.95 280 450 μA 2 Iss2 Vout=Vout(T)+ 0.5V 70 110 μA 2 Fosc Vout=Vout(T)×0.95 510 600 690 kHz 3 Duty Vout=Vout(T)×0.95 80 88 95 % 3 Fimt Ron Vout=Vout(T)×0.95 Ilxl Vout=Vlx=7V 12 17 kHz 3 270 370 mΩ 4 1 μA 5 * Vout: input voltage to VOUT pin * Vout(T): typical value of Vout1 * Remarks: test circuit No Vout=3.0V(ELM92301x) Parameter Input voltage Starting voltage Output voltage1 Output voltage2 Current consumption1 Current consumption2 Oscillating frequency Duty ratio Frequency of intermittent control On-resistance of LX switch Leakage current of LX switch L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C Symbol Condition Min. Typ. Max. Unit Note Vin 7 V Vst No-load 0.9 V 1 Vout1 Iout=60mA, Vin=1.5V 2.925 3.000 3.075 V 1 Vout1 Vout1 Vout1 Vout2 Iout=0.1mA, Vin=1.5V V 1 ×1.005 ×1.010 ×1.020 Iss1 Vout=Vout(T)×0.95 300 480 μA 2 Iss2 Vout=Vout(T)+0.5V 75 120 μA 2 Fosc Vout=Vout(T)×0.95 510 600 690 kHz 3 Duty Vout=Vout(T)×0.95 80 88 95 % 3 Fimt Ron Vout=Vout(T)×0.95 Ilxl Vout=Vlx=7V * Vout: input voltage to VOUT pin * Vout(T): typical value of Vout1 * Remarks: test circuit No 14 - 3 12 17 kHz 3 250 340 mΩ 4 1 μA 5 ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter Vout=3.3V(ELM92331x) Parameter Input voltage Starting voltage Output voltage1 Output voltage2 Current consumption1 Current consumption2 Oscillating frequency Duty ratio Frequency of intermittent control On-resistance of LX switch Leakage current of LX switch L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C Symbol Condition Min. Typ. Max. Unit Note Vin 7 V Vst No-load 0.9 V 1 Vout1 Iout=60mA, Vin=1.5V 3.218 3.300 3.382 V 1 Vout1 Vout1 Vout1 Vout2 Iout=0.1mA, Vin=1.5V V 1 ×1.005 ×1.010 ×1.020 Iss1 Vout=Vout(T)×0.95 320 510 μA 2 Iss2 Vout=Vout(T)+0.5V 80 130 μA 2 Fosc Vout=Vout(T)×0.95 510 600 690 kHz 3 Duty Vout=Vout(T)×0.95 80 88 95 % 3 Fimt Ron Vout=Vout(T)×0.95 Ilxl Vout=Vlx=7V 12 17 kHz 3 245 330 mΩ 4 1 μA 5 * Vout: input voltage to VOUT pin * Vout(T): typical value of Vout1 * Remarks: test circuit No Vout=5.0V(ELM92501x) Parameter Input voltage Starting voltage Output voltage1 Output voltage2 Current consumption1 Current consumption2 Oscillating frequency Duty ratio Frequency of intermittent control On-resistance of LX switch Leakage current of LX switch L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C Symbol Condition Min. Typ. Max. Unit Note Vin 7 V Vst No-load 0.9 V 1 Vout1 Iout=60mA, Vin=3V 4.875 5.000 5.125 V 1 Vout1 Vout1 Vout1 Vout2 Iout=0.1mA, Vin=3V V 1 ×1.005 ×1.010 ×1.020 Iss1 Vout=Vout(T)×0.95 550 880 μA 2 Iss2 Vout=Vout(T)+0.5V 90 145 μA 2 Fosc Vout=Vout(T)×0.95 510 600 690 kHz 3 Duty Vout=Vout(T)×0.95 80 88 95 % 3 Fimt Ron Vout=Vout(T)×0.95 Ilxl Vout=Vlx=7V * Vout: input voltage to VOUT pin * Vout(T): typical value of Vout1 * Remarks: test circuit No 14 - 4 12 17 kHz 3 220 300 mΩ 4 1 μA 5 ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter ■Electrical characteristics (ELM92xx2x) Vout=2.7V(ELM92272x) Parameter Input voltage Starting voltage Output voltage1 Output voltage2 Current consumption1 Current consumption2 Current consumption in Shutdown Oscillating frequency Duty ratio Frequency of Intermittent control On-resistance of LX switch Leakage current of LX switch CE Input voltage "H" CE Input voltage "L" CE Input current "H" CE Input current "L" Vce=Vout, L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C Symbol Condition Min. Typ. Max. Unit Note Vin 7 V Vst No-load 0.9 V 1 Vout1 Iout=60mA, Vin=1.5V 2.633 2.700 2.767 V 1 Vout1 Vout1 Vout1 Vout2 Iout=0.1mA, Vin=1.5V V 1 ×1.005 ×1.010 ×1.020 Iss1 Vout=Vout(T)×0.95 280 450 μA 2 Iss2 Vout=Vout(T)+0.5V 70 110 μA 2 Isd Vout=Vout(T)×0.95, Vce=0 0.5 μA 2 600 88 690 95 kHz % 3 3 Fimt 12 17 kHz 3 Ron Vout=Vout(T)×0.95 Ilxl Vout=Vlx=7V Vceh Vcel Vout=Vout(T)×0.95, Iceh Vce=Vout(T)×0.95 Icel Vout=Vout(T)×0.95, Vce=0 270 370 1 0.25 mΩ μA V V 4 5 6 6 0.1 μA 6 -0.1 μA 6 Fosc Vout=Vout(T)×0.95 Duty Vout=Vout(T)×0.95 510 80 0.8 * 1.Vout: input voltage to VOUT pin. 2.Vout(T): typical value of Vout1. 3.Vce: input voltage to CE pin. 4.Remarks: test circuit No Vout=3.0V(ELM92302x) Parameter Input voltage Starting voltage Output voltage1 Output voltage2 Current consumption1 Current consumption2 Current consumption in Shutdown Oscillating frequency Duty ratio Frequency of Intermittent control On-resistance of LX switch Leakage current of LX switch CE Input voltage "H" CE Input voltage "L" CE Input current "H" CE Input current "L" Vce=Vout, L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C Symbol Condition Min. Typ. Max. Unit Note Vin 7 V Vst No-load 0.9 V 1 Vout1 Iout=60mA, Vin=1.5V 2.925 3.000 3.075 V 1 Vout1 Vout1 Vout1 Vout2 Iout=0.1mA, Vin=1.5V V 1 ×1.005 ×1.010 ×1.020 Iss1 Vout=Vout(T)×0.95 300 480 μA 2 Iss2 Vout=Vout(T)+0.5V 75 120 μA 2 Isd Vout=Vout(T)×0.95, Vce=0 0.5 μA 2 600 88 690 95 kHz % 3 3 Fimt 12 17 kHz 3 Ron Vout=Vout(T)×0.95 Ilxl Vout=Vlx=7V Vceh Vcel Vout=Vout(T)×0.95, Iceh Vce=Vout(T)×0.95 Icel Vout=Vout(T)×0.95, Vce=0 250 340 1 0.25 mΩ μA V V 4 5 6 6 0.1 μA 6 -0.1 μA 6 Fosc Vout=Vout(T)×0.95 Duty Vout=Vout(T)×0.95 510 80 0.8 * 1.Vout: input voltage to VOUT pin. 2.Vout(T): typical value of Vout1. 3.Vce: input voltage to CE pin. 4.Remarks: test circuit No 14 - 5 ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter Vout=3.3V(ELM92332x) Parameter Input voltage Starting voltage Output voltage1 Output voltage2 Current consumption1 Current consumption2 Current consumption in Shutdown Oscillating frequency Duty ratio Frequency of Intermittent control On-resistance of LX switch Leakage current of LX switch CE Input voltage "H" CE Input voltage "L" CE Input current "H" CE Input current "L" Vce=Vout, L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C Symbol Condition Min. Typ. Max. Unit Note Vin 7 V Vst No-load 0.9 V 1 Vout1 Iout=60mA, Vin=1.5V 3.218 3.300 3.382 V 1 Vout1 Vout1 Vout1 Vout2 Iout=0.1mA, Vin=1.5V V 1 ×1.005 ×1.010 ×1.020 Iss1 Vout=Vout(T)×0.95 320 510 μA 2 Iss2 Vout=Vout(T)+0.5V 80 130 μA 2 Isd Vout=Vout(T)×0.95, Vce=0 0.5 μA 2 600 88 690 95 kHz % 3 3 Fimt 12 17 kHz 3 Ron Vout=Vout(T)×0.95 Ilxl Vout=Vlx=7V Vceh Vcel Vout=Vout(T)×0.95, Iceh Vce=Vout(T)×0.95 Icel Vout=Vout(T)×0.95, Vce=0 245 330 1 0.25 mΩ μA V V 4 5 6 6 0.1 μA 6 -0.1 μA 6 Fosc Vout=Vout(T)×0.95 Duty Vout=Vout(T)×0.95 510 80 0.8 * 1.Vout: input voltage to VOUT pin. 2.Vout(T): typical value of Vout1. 3.Vce: input voltage to CE pin. 4.Remarks: test circuit No Vout=5.0V(ELM92502x) Parameter Input voltage Starting voltage Output voltage1 Output voltage2 Current consumption1 Current consumption2 Current consumption in Shutdown Oscillating frequency Duty ratio Frequency of Intermittent control On-resistance of LX switch Leakage current of LX switch CE Input voltage "H" CE Input voltage "L" CE Input current "H" CE Input current "L" Vce=Vout, L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C Symbol Condition Min. Typ. Max. Unit Note Vin 7 V Vst No-load 0.9 V 1 Vout1 Iout=60mA, Vin=3V 4.875 5.000 5.125 V 1 Vout1 Vout1 Vout1 Vout2 Iout=0.1mA, Vin=3V V 1 ×1.005 ×1.010 ×1.020 Iss1 Vout=Vout(T)×0.95 550 880 μA 2 Iss2 Vout=Vout(T)+0.5V 90 145 μA 2 Isd Vout=Vout(T)×0.95, Vce=0 0.5 μA 2 600 88 690 95 kHz % 3 3 Fimt 12 17 kHz 3 Ron Vout=Vout(T)×0.95 Ilxl Vout=Vlx=7V Vceh Vcel Vout=Vout(T)×0.95, Iceh Vce=Vout(T)×0.95 Icel Vout=Vout(T)×0.95, Vce=0 220 300 1 0.25 mΩ μA V V 4 5 6 6 0.1 μA 6 -0.1 μA 6 Fosc Vout=Vout(T)×0.95 Duty Vout=Vout(T)×0.95 510 80 0.8 * 1.Vout: input voltage to VOUT pin. 2.Vout(T): typical value of Vout1. 3.Vce: input voltage to CE pin. 4.Remarks: test circuit No 14 - 6 ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter ■Test circuits 1. Vout1, Vout2, Vst 2. Iss1, Iss2, Isd � ����� ��� ��������� � ���������� ���� �� ��� � �� ��� �� � ��������� ��� ��� �� ��� ��� 3. Fosc, Duty, Fimt (LX pin) �� ���� ��� �� ��������� ��� ���� * Fosc, Duty : Vin=Vout(T)×0.95 * Fimt : Vin=Vout1(1.005 to 1.020) ��� 4. RON ������������������������ �� ���� � ��� ��� ��� �� ��������� ��� * Vlx=3V, R=30Ω R • Von * Ron= Vlx-Von Ω ��� ��� 5. Ilxl 6. Vceh, Vcel, Iceh, Icel ���� � ���� �� ��� ��� ��������� ���� ���� �� ��� �� ��� ��� ��������� ��� Remarks) CE pin : ELM92xx2x series 14 - 7 �� � ��� � ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter ■External parts To design DC/DC converters using ELM92 series, coil, diode, and capacitor are necessary. (Refer to the standard circuit configuration.) 1) Coil When choosing choke coil, please select that whose core is not magnetically saturated, DC resistance is low, and which has sufficient margin for rated current. ELM recommends to use inductance around 2.2μH. It is possible that output voltage ripple form may reach over 10mV when using high industance. If ripple can be ingored, it is possible to acquire high efficiency with high industance. The examples using 4.7μH are shown as follows. ELM9230xx ELM9250xx ELM9230xx ELM9250xx EFFICIENCY - Iout EFFICIENCY - Iout 100 100 2.4V 1.8V 80 70 1.5V Vin=0.9V 60 1.1V 50 3.6V 90 40 30 EFFICIENCY (%) EFFICIENCY (%) 90 Vin=1.8V 70 2.4V 60 50 40 30 20 20 10 10 0 3.0V 80 0 0.1 1 10 Iout (mA) 100 1000 0.1 1 10 Iout (mA) 100 1000 * CR43/CD43/CR54/CD54 : Sumida Electric Co., Ltd are recommended. 2) Diode When choosing diode, please select that whose forward voltage is small, switching speed is high and which has sufficient margin for rated current. ELM recommends diode which is around 1A class. 3) Capacitor * Cout When choosing capacitor, please select that which is generally used for smoothing power supply circuit, with comparatively large capacity and whose rated voltage is at least three times larger than rated output voltage of used ELM92 series. ELM recommends capacitor which is 47μF to 220μF. When Vin is high (Vin>Vout×0.7), it is possible that large ripple of Iout may happen because of intermittent operation; ELM recommends to use larger capacitor under such circumstance. Cin * Using Cin in the circuit can lower feedback noise to Input; this method is also effective in improving efficiency because input voltage drop during switching can be eased. To gain this effect, please connect tantalum capacitor of 47μF to 220μF to coil as close as possible. 14 - 8 ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter 4) Remedies for noise This DC/DC converter may cause electromagnetic noise due to switching of coil under large current. Solution is necessary especially when the IC is used in wireless devices. To reduce noise, this IC is designed in consideration of coil switching characteristics. The following methods are also effective to reduce noise. • Use shield-type, or magnetic shield coil. • Locate coil and diode to the LX terminal of IC as close as possible. • Select ground wire as thick and short as possible. • Connect ground wire of circuit to one point. ■Marking SOT-89 � � � � SOP-89-5 � � � � • SOT-89 package : ELM92xx1B • SOT-89-5 package : ELM92xx2B(with CE) a : Assembly lot No. B to Z (I, O, X excepted) b : Assembly lot No. A to Z (I, O, X excepted) c : the integer digit of the output voltage Mark Vout Mark Vout 2 2.*V 4 4.*V 3 3.*V 5 5.*V d : the decimal digit of the output voltage Mark Vout Mark Vout 0 .0V 5 * *.5V 1 6 *.1V *.6V 2 .2V 7 * *.7V 3 8 *.3V *.8V 4 .4V 9 * *.9V 14 - 9 ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter ■Typical characteristics • Vout=2.7V(ELM9227xx) (L=2.2μH, Cout=47μF, D=MA735, Top=25°C) Vout Vout --- Vin Vin Vout Vin 3.5 3.5 3.5 2.9 2.9 2.9 Iout=150mA Iout=150mA Iout=150mA 2 22 60mA 60mA 60mA 10mA 10mA 10mA 1.5 1.5 1.5 1 10 0 EFFICIENCY(%) (%) EFFICIENCY Vout Vout(V) (V) Vout (V) 2.5 2.5 2.5 1.1V 1.5V 1.8V 1.1V1.5V 1.5V 1.8V 1.8V 1.1V 2.8 2.8 2.8 2.7 Vin=0.9V 2.7 Vin=0.9V Vin=0.9V 2.7 2.6 2.6 2.6 2.5 2.5 2.5 1 1 2.4 2.4 0.1 2.4 0.1 0.1 2 22 Vin (V) (V) Vin (V) EFFICIENCY EFFICIENCY --- Iout Iout EFFICIENCY Iout Vin=0.9V Vin=0.9V Vin=0.9V 1 11 1.8V 1.8V 1.8V 1.5V 1.5V 1.5V 10 10 10 Iout (mA) Iout(mA) (mA) Iout 100 100 100 1000 1000 1000 Vout1 Top Vout1---Top Top Vout1 2.8 2.8 2.8 Vin=1.5V, Iout=60mA Vin=1.5V,Iout=60mA Iout=60mA Vin=1.5V, 2.75 2.75 2.75 Vout1(V) Vout1(V) Vout1(V) Vout(V) (V) Vout (V) Vout 3 33 100 100 90 90 80 80 70 70 60 60 50 50 40 40 30 30 20 20 10 10 00 0.1 0.1 Vout Iout Vout---Iout Iout Vout 3 33 1.1V 1.1V 1.1V 2.7 2.7 2.7 2.65 2.65 2.65 11 10 10 10 Iout Iout (mA) (mA) (mA) 100 100 100 2.6 2.6 2.6 -20 -10 -10 0 10 20 20 30 40 40 50 60 60 70 -20 -20 -10 00 10 10 20 30 30 40 50 50 60 70 70 1000 1000 1000 Top(°C) Top(°C) Top(°C) Vst Vst -- Iout Iout Iout 22 Load-Transient Response Load-Transient Load-TransientResponse Response /div 200 ��ss /div 200 200 �s /div Vst(V) (V) Vst Vst (V) 1.5 1.5 1.5 11 1 0.5 0.5 0.5 00 00.1 0.1 0.1 -20°C -20°C -20°C Vout, 50mV/div 50mV/div Vout, Vout, 50mV/div +70°C +70°C +70°C +25°C +25°C +25°C Iout Iout Iout 100mA 100mA 100mA A 100 ��A 100 100 �A 11 1 10 10 10 Iout Iout (mA) Iout (mA) (mA) 100 100 100 14 - 10 ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter • Vout=3.0V(ELM9230xx) (L=2.2μH, Cout=47μF, D=MA735, Top=25°C) Vout - Vin Vout Vout -- Vin Vin 3.5 3.5 3.5 3.2 3.2 3.2 Iout=150mA Iout=150mA Iout=150mA 2 22 60mA 60mA 60mA 10mA 10mA 10mA 1.5 1.5 1.5 11 100 0 EFFICIENCY(%) (%) EFFICIENCY EFFICIENCY (%) Vout Vout (V) (V) Vout (V) 2.5 2.5 2.5 11 1 Vin (V) Vin Vin (V) (V) 222 3.1 3.1 3.1 3 33 2.9 2.9 2.9 2.7 2.7 0.1 2.70.1 0.1 3 3 3 EFFICIENCY - Iout EFFICIENCY EFFICIENCY -- Iout Iout 1 1 1 2.4V 2.4V 2.4V 1.8V 1.8V 1.8V 1.5V 1.5V Vin=0.9V 1.5V Vin=0.9V Vin=0.9V 1.1V 1.1V 1.1V 10 10 10 Iout(mA) Iout(mA) Iout(mA) 100 100 100 Vin=1.5V, Iout=60mA Vin=1.5V, Vin=1.5V, Iout=60mA Iout=60mA 3.05 3.05 3.05 333 2.95 2.95 2.95 1 1 10 10 Iout Iout (mA) (mA) 100 100 2.9 2.9 2.9-20 -20 -10 00 10 10 20 30 30 40 50 50 60 70 70 -20 -10 -10 0 10 20 20 30 40 40 50 60 60 70 1000 1000 1000 Top(°C) Top(°C) Top(°C) Vst Vst -- Iout Iout 222 Load-Transient Load-TransientResponse Response Load-Transient Response 200 /div 200� /div ��sss/div 200 Vst (V) Vst Vst(V) (V) 1.5 1.5 1.5 -20°C -20°C 111 Vout, Vout, 50mV/div 50mV/div Vout, 50mV/div +70°C +70°C 0.5 0.5 0.5 000 0.1 0.1 0.1 1000 1000 1000 Vout11--TTop op V Vout out1 - Top 3.1 3.1 3.1 20 20 20 10 10 10 00 00.1 0.1 0.1 1.8V 1.1V 1.5V 1.8V 1.1V 1.5V 1.8V 1.1V 1.5V 2.4V 2.4V 2.4V Vin=0.9V Vin=0.9V Vin=0.9V 2.8 2.8 2.8 Vout1(V) Vout1(V) Vout1(V) Vout (V) Vout Vout (V) (V) 3 33 100 100 100 90 90 90 80 80 80 70 70 70 60 60 60 50 50 50 40 40 40 30 30 30 Vout - Iout Vout Vout -- Iout Iout 3.3 3.3 3.3 Iout Iout Iout +25°C +25°C 100mA 100mA 100mA 100 100� AA ��A 100 11 10 10 Iout (mA) (mA) Iout 100 100 100 14 - 11 ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter • Vout=3.3V(ELM9233xx) (L=2.2μH, Cout=47μF, D=MA735, Top=25°C) Vout - Vin Vout Vout -- Vin Vin 4 44 3.5 3.5 3.5 Iout=150mA Iout=150mA Iout=150mA 2.5 2.5 2.5 60mA 60mA 60mA 10mA 10mA 10mA 22 2 1.5 1.5 1.500 0 EFFICIENCY(%) (%) EFFICIENCY EFFICIENCY (%) Vout Vout (V) (V) Vout (V) 3 33 11 1 Vin (V) Vin Vin (V) (V) 222 3.2 3.2 3.2 3330.1 0.1 0.1 3 3 3 EFFICIENCY - Iout EFFICIENCY EFFICIENCY -- Iout Iout 2.4V 2.4V 2.4V Vin=0.9V Vin=0.9V Vin=0.9V 1 1 1 1.8V 1.8V 1.8V 1.5V 1.5V 1.5V 10 10 10 Iout (mA) Iout Iout (mA) (mA) 100 100 100 Vin=1.5V,Iout=60mA Iout=60mA Vin=1.5V, Vin=1.5V, Iout=60mA 3.35 3.35 3.35 1.1V 1.1V 1.1V 3.3 3.3 3.3 3.25 3.25 3.25 1 1 10 10 Iout Iout (mA) (mA) 100 100 3.2 3.2 3.2-20 -20 -10 00 10 10 20 30 30 40 50 50 60 70 70 -20 -10 -10 0 10 20 20 30 40 40 50 60 60 70 1000 1000 1000 Top(°C) Top(°C) Top(°C) Load-Transient Load-TransientResponse Response Load-Transient Response Vst Vst -- Iout Iout 222 200 /div 200� /div ��sss/div 200 Vst (V) Vst Vst(V) (V) 1.5 1.5 1.5 -20°C -20°C 111 Vout, Vout, 50mV/div 50mV/div Vout, 50mV/div +70°C +70°C 0.5 0.5 0.5 000 0.1 0.1 0.1 1000 1000 1000 Vout1 - Top Vout1 Vout1 -- Top Top 3.4 3.4 3.4 20 20 20 10 10 10 00 00.1 0.1 0.1 1.1V 1.5V 1.8V 1.1V 1.5V 1.8V 1.1V 1.5V 1.8V 2.4V 2.4V 2.4V 3.3 Vin=0.9V 3.3 3.3 Vin=0.9V Vin=0.9V 3.4 3.4 3.4 3.1 3.1 3.1 Vout1(V) Vout1(V) Vout1(V) Vout (V) Vout Vout (V) (V) 3.5 3.5 3.5 100 100 100 90 90 90 80 80 80 70 70 70 60 60 60 50 50 50 40 40 40 30 30 30 Vout - Iout Vout Vout -- Iout Iout 3.6 3.6 3.6 Iout Iout Iout +25°C +25°C 100mA 100mA 100mA 100 100� AA ��A 100 11 10 10 Iout ((mA mA)) Iout 100 100 100 14 - 12 ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter • Vout=5.0V(ELM9250xx) (L=2.2μH, Cout=47μF, D=MA735, Top=25°C) Vout - Vin Vout Vout -- Vin Vin 5.5 5.5 5.5 Iout=150mA Iout=150mA Iout=150mA 4 44 60mA 60mA 60mA 10mA 10mA 10mA 3.5 3.5 3.5 EFFICIENCY(%) (%) EFFICIENCY EFFICIENCY (%) 33 300 0 100 100 100 90 90 90 80 80 80 70 70 70 60 60 60 50 50 50 40 40 40 30 30 30 Vout Vout (V) (V) Vout (V) 4.5 4.5 4.5 11 1 Vin (V) Vin Vin (V) (V) 222 3 3 3 EFFICIENCY - Iout EFFICIENCY EFFICIENCY -- Iout Iout 3.0V 3.0V 3.0V Vin=0.9V Vin=0.9V Vin=0.9V 1.8V 1.8V 1.8V 1.5V 1.5V 1.5V 3.0V 3.0V 3.0V 1.8V 1.8V 1.8V 1.1V 1.1V 1.1V 1.5V 1.5V Vin=0.9V 1.5V Vin=0.9V Vin=0.9V 1 1 1 10 10 10 Iout (mA) Iout Iout (mA) (mA) 100 100 100 Vout1 - Top Vout1 Vout1 -- Top Top Vin=3.0V, Iout=60mA Vin=3.0V, Vin=3.0V, Iout=60mA Iout=60mA 1.1V 1.1V 1.1V 5 5 5 4.9 4.9 4.9 1 1 10 10 Iout Iout (mA) (mA) 100 100 4.8 4.8 4.8-20 -20 -10 00 10 10 20 30 30 40 50 50 60 70 70 -20 -10 -10 0 10 20 60 70 20 30 40 40 50 60 1000 1000 1000 Top(°C) Top(°C) Top(°C) Vst Vst -- Iout Iout 222 Load-Transient Load-TransientResponse Response Load-Transient Response 200 /div 200� /div ��sss/div 200 Vst (V) Vst Vst(V) (V) 1.5 1.5 1.5 -20°C -20°C 111 Vout, Vout, 50mV/div 50mV/div Vout, 50mV/div +70°C +70°C 0.5 0.5 0.5 0000.1 0.1 0.1 1000 1000 1000 5.1 5.1 5.1 20 20 20 10 10 10 00 00.1 0.1 0.1 Vout - Iout Vout Vout -- Iout Iout 5.2 5.2 5.2 Vout1(V) Vout1(V) Vout1(V) Vout (V) Vout Vout (V) (V) 5 55 5.5 5.5 5.5 5.4 5.4 5.4 5.3 5.3 5.3 5.2 5.2 5.2 5.1 5.1 5.1 5 55 4.9 4.9 4.9 4.8 4.8 4.8 4.7 4.7 4.7 4.6 4.6 4.6 4.5 4.5 0.1 4.50.1 0.1 Iout Iout Iout +25°C +25°C 100mA 100mA 100mA 100 100� AA ��A 100 11 10 10 Iout (mA) (mA) Iout 100 100 100 14 - 13 ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter • ELM9227xx, ELM9230xx, ELM9233xx, ELM9250xx (L=2.2μH, Cout=47μF, D=MA735, Top=25°C) Iss1 - Top 600 9250XX Iss1 (�A) 500 400 9230XX 9233XX 300 9227XX 200 -20 -10 0 10 20 30 40 50 60 70 Top (°C) Fosc - Top Fosc - Top Vceh(V) Vceh(V) 85 85 75 75-20 -10 0 10 20 30 40 50 60 70 -20 -10 0 10 20 30 40 50 60 70 10 20 30 40 50 60 70 10 20 30 40 50 60 70 Top (°C) Top (°C) Top (°C) Top (°C) 0.7 0.7 0.7 0.7 +25°C +25°C 0.5 0.5 Vcel - Vout Vcel - Vout 0.8 0.8 Top= -20°C Top= -20°C 0.6 0.6 +70°C +70°C 0.4 0.4 Top= -20°C Top= -20°C 0.6 0.6 +25°C +25°C 0.5 0.5 +70°C +70°C 0.4 0.4 0.3 0.3 0.3 0.3 0.2 0.2 22 90 90 80 80 Vceh - Vout Vceh - Vout 0.8 0.8 Duty - Top Duty - Top 95 95 Duty Duty(%) (%) 700 700 680 680 660 660 640 640 620 620 600 600 580 580 560 560 540 540 520 520 500 500-20 -10 0 -20 -10 0 Vcel(V) Vcel(V) Fosc(kHz) (kHz) Fosc • ELM92xxxx (L=2.2μH, Cout=47μF, D=MA735, Top=25°C) 33 44 Vout(V) Vout(V) 55 0.2 0.2 22 66 14 - 14 33 44 Vout(V) Vout(V) 55 66