ELM95xxxxE CMOS PWM step-up DC/DC converter http://www.elm-tech.com ■General description ELM95xxxxE is CMOS PWM step-up DC/DC converter which consists of reference voltage source, error amplifier, oscillation circuit, start-up circuit, PWM control circuit, switching current limit circuit, switch transistor and output voltage setting resistor. For external parts, coil, diode and capacitor are possible choices; with external parts, are 2.7V, 3.0V, 3.3V and 5.0V; ELM95 series can also be designed as semi-custom IC within the range of 2.5V to 5.5V by 0.1V step. With newly-developed PWM control circuit, ELM95 series is able to modulate switching time smoothly with constant frequency and consequently generates stable output with small ripples.There are two switching frequency and maximum duty ratio available:(Switching frequency, Maximum duty ratio)=(55kHz, 60%) and (100kHz, 77%). ■Features • • • • • • • • • Output voltage range Low voltage operation Low power operation High efficiency High output voltage accuracy Constant switching frequency Output current (e.g.) Small ripples Package : 2.5V to 5.5V(by 0.1V step) : Vin≥0.9V(No load) : 35µW(ELM9530AxE) : Typ.85% : ±2.5% : Typ.55kHz(Type A), Typ.100kHz(Type B) : 100mA(Type B, Vin=1.5V, Vout=3.3V) : Ceramic capacitor can be used for output capacitor. : SOT-89, SOT-23 ■Application • • • • Constant voltage source for battery-operated devices Constant voltage source for cameras Portable communication equipments Local regulator ■Maximum absolute ratings Parameter Apply voltage to LX pin Apply voltage to VOUT pin Output current of LX pin Power dissipation Operating temperature Storage temperature Symbol Vlx Vout Ilx Limit Vss-0.3 to 8.0 Vss-0.3 to 8.0 500 500 (SOT-89) 250 (SOT-23) -40 to +85 -55 to +125 Pd Top Tstg Unit V V mA mW °C °C Rev.1.2 15 - 1 ELM95xxxxE CMOS PWM step-up DC/DC converter http://www.elm-tech.com ■Selection guide ELM95xxxxE-x Symbol a, b e.g.: 27: Vout=2.7V, 33: Vout=3.3V, Output voltage 30: Vout=3.0V 50: Vout=5.0V A : Switching frequency=55kHz, Maximum duty ratio=60% Switching frequency and maximum duty ratio B : Switching frequency=100kHz, Maximum duty ratio=77% c d Package e Product version f Taping direction ELM95 x x x x E - x ↑ ↑ ↑ ↑ ↑ ↑ a b c d e f A : SOT-89 B : SOT-23 E S: Refer to PKG file N: Refer to PKG file ■Pin configuration SOT-89(TOP VIEW) SOT-23(TOP VIEW) Pin No. 1 2 3 Pin No. 1 2 3 Pin name VSS VOUT LX Pin name VSS LX VOUT ■Standard circuit ELM95xxAxE ELM95xxBxE ������� ����� ��� ��� �� ���������� ����� ���� ���� � � ���� ������� ��� ��� �� ���������� ���� ��� ���� ���� � � ���� ���� ��� ���� ���� Ceramic capacitors are recommended. Rev.1.2 15 - 2 ELM95xxxxE CMOS PWM step-up DC/DC converter http://www.elm-tech.com ■Block diagram �������� ������������������ �� ���� ���������� ������� � ��������������� � � � � � � � � ������ ��������� ��� ���������� ���� ��� ■Electrical characteristics (ELM95xxAxE) Vout=2.7V(ELM9527AxE) L=220μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C Condition Min. Typ. Max. Unit 0.9 7.0 V No load 0.9 V Iout=1mA 0.7 V Vin=1.5V, Iout=1mA 9 18 µA Vin=1.5V, Iout=1mA 2.633 2.700 2.767 V Vout=Vout(T)×0.95 0.65 1.20 Ω Vout=Vlx=7.0V 1.0 µA Vout=Vout(T)×0.95 35 55 75 kHz Vout=Vout(T)×0.95 45 60 75 % Vout=Vout(T)×0.95 600 mA Parameter Input voltage Starting voltage Holding voltage Current consumption Output voltage On-resistance of LX switch Leakage current of LX pin Oscillating frequency Maximum duty ratio Current limit of LX switch Symbol Vin Vst Vhold Iss Vout Ron Ilxl Fosc Duty llimit Vout=3.0V(ELM9530AxE) L=220μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C Symbol Condition Min. Typ. Max. Unit Vin 0.9 7.0 V Vst No load 0.9 V Vhold Iout=1mA 0.7 V Iss Vin=1.5V, Iout=1mA 12 20 µA Vout Vin=1.5V, Iout=1mA 2.925 3.000 3.075 V Ron Vout=Vout(T)×0.95 0.6 1.1 Ω Ilxl Vout=Vlx=7.0V 1.0 µA Fosc Vout=Vout(T)×0.95 35 55 75 kHz Duty Vout=Vout(T)×0.95 45 60 75 % llimit Vout=Vout(T)×0.95 600 mA Parameter Input voltage Starting voltage Holding voltage Current consumption Output voltage On-resistance of LX switch Leakage current of LX pin Oscillating frequency Maximum duty ratio Current limit of LX switch * Vout(T) : Typ. value of Vout * Vout(T) : Typ. value of Vout Rev.1.2 15 - 3 ELM95xxxxE CMOS PWM step-up DC/DC converter http://www.elm-tech.com Vout=3.3V(ELM9533AxE) Parameter Input voltage Starting voltage Holding voltage Current consumption Output voltage On-resistance of LX switch Leakage current of LX pin Oscillating frequency Maximum duty ratio Current limit of LX switch Vout=5.0V(ELM9550AxE) Parameter Input voltage Starting voltage Holding voltage Current consumption Output voltage On-resistance of LX switch Leakage current of LX pin Oscillating frequency Maximum duty ratio Current limit of LX switch L=220μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C Symbol Condition Min. Typ. Max. Unit Vin 0.9 7.0 V Vst No load 0.9 V Vhold Iout=1mA 0.7 V Iss Vin=1.5V, Iout=1mA 14 23 µA Vout Vin=1.5V, Iout=1mA 3.218 3.300 3.382 V Ron Vout=Vout(T)×0.95 0.55 1.00 Ω Ilxl Vout=Vlx=7.0V 1.0 µA Fosc Vout=Vout(T)×0.95 35 55 75 kHz Duty Vout=Vout(T)×0.95 45 60 75 % llimit Vout=Vout(T)×0.95 600 mA * Vout(T) : Typ. value of Vout Symbol Vin Vst Vhold Iss Vout Ron Ilxl Fosc Duty llimit L=220μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C Condition Min. Typ. Max. Unit 0.9 7.0 V No load 0.9 V Iout=1mA 0.7 V Vin=3.0V, Iout=1mA 30 45 µA Vin=3.0V, Iout=1mA 4.875 5.000 5.125 V Vout=Vout(T)×0.95 0.45 0.80 Ω Vout=Vlx=7.0V 1.0 µA Vout=Vout(T)×0.95 35 55 75 kHz Vout=Vout(T)×0.95 45 60 75 % Vout=Vout(T)×0.95 600 mA * Vout(T) : Typ. value of Vout ■Electrical characteristics (ELM95xxBxE) Vout=2.7V(ELM9527BxE) Parameter Input voltage Starting voltage Holding voltage Current consumption Output voltage On-resistance of LX switch Leakage current of LX pin Oscillating frequency Maximum duty ratio Current limit of LX switch Symbol Vin Vst Vhold Iss Vout Ron Ilxl Fosc Duty llimit L=100μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C Condition Min. Typ. Max. Unit 0.9 7.0 V No load 0.9 V Iout=1mA 0.7 V Vin=1.5V, Iout=1mA 15 30 µA Vin=1.5V, Iout=1mA 2.633 2.700 2.767 V Vout=Vout(T)×0.95 0.6 1.1 Ω Vout=Vlx=7.0V 1.0 µA Vout=Vout(T)×0.95 80 100 120 kHz Vout=Vout(T)×0.95 70 77 85 % Vout=Vout(T)×0.95 600 mA * Vout(T) : Typ. value of Vout Rev.1.2 15 - 4 ELM95xxxxE CMOS PWM step-up DC/DC converter http://www.elm-tech.com Vout=3.0V(ELM9530BxE) Parameter Input voltage Starting voltage Holding voltage Current consumption Output voltage On-resistance of LX switch Leakage current of LX pin Oscillating frequency Maximum duty ratio Current limit of LX switch Vout=3.3V(ELM9533BxE) Parameter Input voltage Starting voltage Holding voltage Current consumption Output voltage On-resistance of LX switch Leakage current of LX pin Oscillating frequency Maximum duty ratio Current limit of LX switch Vout=5.0V(ELM9550BxE) Parameter Input voltage Starting voltage Holding voltage Current consumption Output voltage On-resistance of LX switch Leakage current of LX pin Oscillating frequency Maximum duty ratio Current limit of LX switch L=100μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C Symbol Condition Min. Typ. Max. Unit Vin 0.9 7.0 V Vst No load 0.9 V Vhold Iout=1mA 0.7 V Iss Vin=1.5V, Iout=1mA 18 32 µA Vout Vin=1.5V, Iout=1mA 2.925 3.000 3.075 V Ron Vout=Vout(T)×0.95 0.6 1.1 Ω Ilxl Vout=Vlx=7.0V 1.0 µA Fosc Vout=Vout(T)×0.95 80 100 120 kHz Duty Vout=Vout(T)×0.95 70 77 85 % llimit Vout=Vout(T)×0.95 600 mA * Vout(T) : Typ. value of Vout L=100μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C Symbol Condition Min. Typ. Max. Unit Vin 0.9 7.0 V Vst No load 0.9 V Vhold Iout=1mA 0.7 V Iss Vin=1.5V, Iout=1mA 20 35 µA Vout Vin=1.5V, Iout=1mA 3.218 3.300 3.382 V Ron Vout=Vout(T)×0.95 0.55 1.00 Ω Ilxl Vout=Vlx=7.0V 1.0 µA Fosc Vout=Vout(T)×0.95 80 100 120 kHz Duty Vout=Vout(T)×0.95 70 77 85 % llimit Vout=Vout(T)×0.95 600 mA * Vout(T) : Typ. value of Vout Symbol Vin Vst Vhold Iss Vout Ron Ilxl Fosc Duty llimit L=100μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C Condition Min. Typ. Max. Unit 0.9 7.0 V No load 0.9 V Iout=1mA 0.7 V Vin=3.0V, Iout=1mA 35 55 µA Vin=3.0V, Iout=1mA 4.875 5.000 5.125 V Vout=Vout(T)×0.95 0.45 0.80 Ω Vout=Vlx=7.0V 1.0 µA Vout=Vout(T)×0.95 80 100 120 kHz Vout=Vout(T)×0.95 70 77 85 % Vout=Vout(T)×0.95 600 mA * Vout(T) : Typ. value of Vout Rev.1.2 15 - 5 ELM95xxxxE CMOS PWM step-up DC/DC converter http://www.elm-tech.com ■Marking SOT-89 SOT-23 a, b : Represents Output voltage range and Package type and Switching frequency type Output voltage range Symbol Package Switching frequency (V) 5P 2.5~3.0 SOT-89 55kHz 5Q 2.5~3.0 SOT-89 100kHz 5R 3.1~5.5 SOT-89 55kHz 5S 3.1~5.5 SOT-89 100kHz 5T 2.5~3.0 SOT-23 55kHz 5U 2.5~3.0 SOT-23 100kHz 5V 3.1~5.5 SOT-23 55kHz 5W 3.1~5.5 SOT-23 100kHz c : Represents Output voltage. Symbol 1 2 3 4 5 6 7 8 9 0 A B C D E Output voltage(V) Symbol 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 4.5 F G H J K L M N P Q R S T U V Output voltage(V) 2.5 2.6 2.7 2.8 2.9 3.0 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5 d : Represents the assembly lot number 1~0, A~Z repeated (I,O,X excepted) Rev.1.2 15 - 6 ELM95xxxxE CMOS PWM step-up DC/DC converter http://www.elm-tech.com ■External parts To design DC/DC converter using ELM95 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 220µH for ELM995xxAxE, and ELM95xxBxE. For ELM95 series, ELM recommends following coil. • SLF7045T (TDK corporation) 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. For ELM95 series, ELM recommends schottky diodes. 3) Capacitor When choosing capacitor, please select that which is generally used for smoothing power supply circuit, with comparatively large capacity, with small equivalent series resistance, and with large rated voltage. For ELM95 series, ELM recommends ceramic capacitor, although Aluminum electrolytic and Tantalum capacitors also can be used. Under heavier load condition using small output capacitor, there might be cases that few hundred hertz wave motion will happen in output voltage waveform. Under such cases, ELM recommends to use capacitor with larger capacity. Examples are shown as follows. ELM recommends 47µF or larger for Cout and 47µF for Cin. On the other hand, under light load use (Iout<20mA) only, it is possible to use smaller capacitors such as Cin=Cout=22µF. One of example of solution for large amplitude waveform with lower frequency are shown as follows: ELM9550AxE Vout waveform 5.25 5.25 5.25 5.25 Vin=3.0V, Vin=3.0V, Iout=100mA Iout=100mA 5.20 5.20 5.10 5.10 5.05 5.05 5.00 5.00 4.95 4.95 using Cout=47µF Vin=3.0V, Vin=3.0V, Iout=100mA Iout=100mA Vout (V) 5.15 5.15 Vout (V) 5.15 5.15 5.10 5.10 Vout (V) Vout (V) 5.20 5.20 ELM9550AxE Vout waveform using Cout=22µF 5.05 5.05 5.00 5.00 4.95 4.95 4.90 4.90 4.90 4.90 4.85 4.85 4.85 4.85 4.80 4.80 4.80 4.80 4.75 4.75 400360 400 360 320 320 280 280 240 240 200160 200 120 0 40 0 804012080160 4.75 4.75 400360 400 360 320 320 280 280 240 240 200160 200 120 0 40 0 804012080160 Time Time ( �s) ( �s) Time Time ( �s) ( �s) 4) Remedies for noise The 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. Rev.1.2 15 - 7 ELM95xxxxE CMOS PWM step-up DC/DC converter http://www.elm-tech.com ■Typical characteristics �ELM9527AxE (VOUT=2.7V, Fosc=55kHz, Duty=60%) L=220�H, CIN=COUT=47�F, D=DB2J208, Top=25� • ELM9527AxE(Vout=2.7V, Fosc=55kHz, Duty=60%) L=220µH, Cin=Cout=47µF, D=DB2J208, Top=25°C Vout-Vin 3.0 Iout=1mA 2.8 2.8 2.7 2.4 2.2 Iout=10mA 2.0 Iout=60mA 0.5 1.0 1.5 2.0 Vin (V) Efficiency-Iout 100 Iout (mA) 100 Vout, Frequency-Top Vin=1.5V, Iout=10mA 50 0.1 1 10 Iout (mA) 100 Vst, Vhold-Iout 1.6 Vout 65 60 2.68 2.66 50 0 -20 20 40 Top (�) Vout (V) 2.8 0.8 2.7 2.6 2.5 100 Iout Vhold 50mA 50 0.2 1mA 20 30 Iout (mA) 40 50 45 Vout 2.4 0.6 80 Vin=1.5V 2.9 1.0 60 Load transient response 3.0 Vst 10 55 Frequency 2.62 -40 1000 75 70 2.64 Vin=1.8V 0 0 1000 Frequency (kHz) Vout (V) Efficiency (%) Vin=1.5V 60 Vst, Vhold (V) 10 2.70 Vin=0.9V 70 0.4 1 2.72 Vin=1.1V 1.2 Vin=1.8V 2.74 90 1.4 Vin=1.1V 2.3 0.1 2.5 Vin=1.5V Vin=0.9V 2.5 2.4 1.8 80 2.6 0 2 4 1mA 6 0 8 10 12 14 16 18 20 Iout (mA) Vout (V) Vout (V) 2.6 1.6 0.0 Vout-Iout 2.9 Time (ms) Rev.1.2 15 - 8 ELM95xxxxE CMOS PWM step-up DC/DC converter http://www.elm-tech.com �ELM9530AxE (VOUT=3.0V, Fosc=55kHz, Duty=60%) L=220�H, CIN=Cout=47�F, D=DB2J208, Top=25� • ELM9530AxE(Vout=3.0V, Fosc=55kHz, Duty=60%) L=220µH, Cin=Cout=47µF, D=DB2J208, Top=25°C Vout-Vin 3.2 Iout=1mA 3.0 3.1 Iout=10mA Iout=60mA 2.7 1.8 0.0 2.6 0.1 0.5 1.0 1.5 Vin (V) 2.0 2.5 3.0 Efficiency-Iout Vin=0.9V Vin=1.1V Vin=1.5V 60 1 10 Iout (mA) 100 10 100 Iout (mA) Vin=1.5V, Iout=10mA Vout 65 60 2.98 2.96 55 Frequency 50 0 -20 20 40 Top (�) Vout (V) 2.9 2.8 100 Iout Vhold 50mA 50 0.2 1mA 10 20 30 Iout (mA) 40 50 45 Vout 3.0 2.7 0.6 80 Vin=1.5V 3.1 0.8 60 Load transient response 3.2 Vst 75 70 3.3 1.0 0 0 1000 Vout, Frequency-Top 2.92 -40 1000 Vst, Vhold-Iout 1.6 0.4 1 2.94 50 0.1 1.2 Vin=2.4V 3.02 Vin=1.8V 1.4 Vin=1.8V 3.00 70 Vin=1.5V Vin=1.1V 3.04 Vin=2.4V 90 Vin=0.9V 2.8 2.0 100 Vst, Vhold (V) 2.9 Frequency (kHz) 2.4 0 2 4 1mA 6 0 8 10 12 14 16 18 20 Iout (mA) 2.6 2.2 Efficiency (%) Vout (V) 3.0 Vout (V) Vout (V) 2.8 80 Vout-Iout 3.2 Time (ms) Rev.1.2 15 - 9 ELM95xxxxE CMOS PWM step-up DC/DC converter http://www.elm-tech.com �ELM9533AxE (VOUT=3.3V, Fosc=55kHz, Duty=60%) L=220�H, CIN=Cout=47�F, D=DB2J208, Top=25� • ELM9533AxE(Vout=3.3V, Fosc=55kHz, Duty=60%) L=220µH, Cin=Cout=47µF, D=DB2J208, Top=25°C Vout-Vin Iout=1mA 3.4 3.0 Iout=10mA 2.8 Iout=60mA 2.6 3.2 2.2 0.0 2.9 0.1 0.5 1.0 1.5 Vin (V) 2.0 2.5 3.0 Efficiency-Iout Vout (V) Vin=1.1V Vin=1.5V Vin=1.8V 60 1 10 Iout (mA) 100 Vin=2.4V 1 10 Iout (mA) 100 Vin=1.5V, Iout=10mA Vout 3.30 65 60 3.28 3.26 55 Frequency 50 0 -20 20 40 Top (�) Vout (V) 0.8 3.2 3.1 100 Iout Vhold 50mA 50 0.2 1mA 10 20 30 Iout (mA) 40 50 45 Vout 3.3 3.0 0.6 80 Vin=1.8V 3.4 1.0 60 Load transient response 3.5 Vst 75 70 3.6 1.2 0 0 1000 Vout, Frequency-Top 3.22 -40 1000 Vst, Vhold-Iout 1.6 0.4 Vin=1.8V 3.24 50 0.1 1.4 Vin=1.5V 3.32 Vin=0.9V 70 Vin=1.1V 3.34 Vin=2.4V 80 Vin=0.9V 3.1 3.0 90 Efficiency (%) 3.3 2.4 100 Vst, Vhold (V) Vout (V) Vout (V) 3.2 Frequency (kHz) 3.4 Vout-Iout 3.5 0 2 4 1mA 6 Iout (mA) 3.6 0 8 10 12 14 16 18 20 Time (ms) Rev.1.2 15 - 10 ELM95xxxxE CMOS PWM step-up DC/DC converter http://www.elm-tech.com �ELM9550AxE (VOUT=5.0V, Fosc=55kHz, Duty=60%) L=220�H, CIN=Cout=47�F, D=DB2J208, Top=25� • ELM9550AxE(Vout=5.0V, Fosc=55kHz, Duty=60%) L=220µH, Cin=Cout=47µF, D=DB2J208, Top=25°C Vout-Vin 5.2 Iout=1mA 5.0 5.1 Vin=3.0V 5.0 Vout (V) 4.6 Iout=10mA 4.4 Iout=60mA 4.2 4.9 Vin=0.9V 4.8 Vin=1.1V Vin=1.8V Vin=1.5V 4.7 4.0 1.0 2.0 3.0 4.0 Vin (V) 4.6 0.1 5.0 Efficiency-Iout 100 1 Vin=3.0V, Iout=10mA 70 Vout (V) Vin=1.8V Vin=1.1V Vin=1.5V 60 Vout 65 60 4.96 4.92 1 10 Iout (mA) 100 50 4.84 -40 1000 Vst, Vhold-Iout 2.5 0 -20 20 40 Top (�) Vout (V) Vst, Vhold (V) 1.5 0.5 0 0 4.9 4.8 100 Iout 50mA 50 Vhold 1mA 10 20 30 Iout (mA) 40 50 45 Vout 5.0 4.7 1.0 80 Vin=3.0V 5.1 Vst 60 Load transient response 5.3 5.2 2.0 55 Frequency 4.88 50 0.1 75 70 5.00 Vin=0.9V 1000 5.04 90 80 100 Vout, Frequency-Top 5.08 Vin=3.0V 10 Iout (mA) Frequency (kHz) 3.8 0.0 0 2 4 1mA 6 Iout (mA) Vout (V) 4.8 Efficiency (%) Vout-Iout 5.2 0 8 10 12 14 16 18 20 Time (ms) Rev.1.2 15 - 11 ELM95xxxxE CMOS PWM step-up DC/DC converter http://www.elm-tech.com �ELM9527BxE (VOUT=2.7V, Fosc=100kHz, Duty=77%) L=100�H, CIN=Cout=47�F, D=DB2J208, Top=25� • ELM9527BxE(Vout=2.7V, Fosc=100kHz, Duty=77%) L=100µH, Cin=Cout=47µF, D=DB2J208, Top=25°C Iout=1mA 2.8 2.4 Iout=10mA 2.2 Iout=60mA 2.0 0.5 Vin=0.9V 2.5 Vin=1.1V 1.0 1.5 2.0 Vin (V) Vin=1.5V 2.3 0.1 2.5 Efficiency-Iout 100 1 Vin=1.8V 10 Iout (mA) 2.72 Vout (V) 80 Vin=0.9V Vin=1.1V 60 1 10 Iout (mA) 100 Vout Vst, Vhold-Iout 1.6 110 105 2.68 2.66 95 0 -20 20 40 Iout (mA) 2.8 0.8 Vhold Vout (V) Vst 2.6 2.5 100 Iout 0.4 50mA 50 0.2 0 0 1mA 10 20 30 Iout (mA) 40 50 90 Vout 2.7 2.4 0.6 80 Vin=1.5V 2.9 1.2 60 Load transient response 3.0 1.4 1.0 100 Frequency 2.62 -40 1000 120 115 2.64 Vin=1.5V 50 0.1 1000 Vin=1.5V, Iout=10mA 2.70 70 100 Vout, Frequency-Top 2.74 90 Efficiency (%) 2.6 2.4 1.8 Vst, Vhold (V) Vin=1.8V 2.7 Vout (V) Vout (V) 2.6 1.6 0.0 Vout-Iout 2.9 Frequency (kHz) 2.8 Vout-Vin 0 2 4 1mA 6 Iout (mA) 3.0 0 8 10 12 14 16 18 20 Time (ms) Rev.1.2 15 - 12 ELM95xxxxE CMOS PWM step-up DC/DC converter http://www.elm-tech.com �ELM9530BxE (VOUT=3.0V, Fosc=100kHz, Duty=77%) L=100�H, CIN=Cout=47�F, D=DB2J208, Top=25� • ELM9530BxE(Vout=3.0V, Fosc=100kHz, Duty=77%) L=100µH, Cin=Cout=47µF, D=DB2J208, Top=25°C Vout-Vin 3.2 Iout=1mA 3.0 3.1 Iout=10mA Iout=60mA 2.2 2.7 1.8 0.0 2.6 0.1 0.5 1.0 1.5 Vin (V) 2.0 3.0 Efficiency-Iout Vin=1.5V Vin=1.8V 1 10 Iout (mA) Vout (V) Vin=1.1V Vin=1.5V Vin=1.8V 50 0.1 1 10 Iout (mA) 100 Vin=1.5V, Iout=10mA Vout 110 105 2.98 2.96 95 0 -20 20 40 Iout (mA) 3.1 Vout (V) Vst 0.8 Vhold 2.9 2.8 100 2.7 Iout 50mA 50 0.2 1mA 20 30 Iout (mA) 40 50 90 Vout 3.0 0.4 10 80 Vin=1.5V 3.2 1.2 60 Load transient response 3.3 1.4 0 0 100 Frequency 2.92 -40 1000 120 115 2.94 Vst, Vhold-Iout 1.6 1000 3.02 Vin=0.9V 60 100 Vout, Frequency-Top 3.00 70 0.6 Vin=1.1V 3.04 Vin=2.4V 90 Efficiency (%) 2.5 Vin=0.9V 2.8 2.0 100 Vst, Vhold (V) 2.9 Frequency (kHz) 2.4 0 2 4 1mA 6 Iout (mA) 2.6 1.0 Vin=2.4V 3.0 Vout (V) Vout (V) 2.8 80 Vout-Iout 3.2 0 8 10 12 14 16 18 20 Time (ms) Rev.1.2 15 - 13 ELM95xxxxE CMOS PWM step-up DC/DC converter http://www.elm-tech.com �ELM9533BxE (VOUT=3.3V, Fosc=100kHz, Duty=77%) L=100�H, CIN=Cout=47�F, D=DB2J208, Top=25� • ELM9533BxE(Vout=3.3V, Fosc=100kHz, Duty=77%) L=100µH, Cin=Cout=47µF, D=DB2J208, Top=25°C Vout-Vin 3.6 Iout=1mA 3.4 3.4 Iout=60mA 0.5 1.0 1.5 Vin (V) 2.0 2.5 2.9 0.1 3.0 Efficiency-Iout 100 10 Iout (mA) Vout (V) Vin=0.9V Vin=1.1V 70 Vin=1.5V 60 Vin=1.5V, Iout=10mA 1 10 Iout (mA) 100 Vout Vst, Vhold-Iout 1.6 110 105 3.28 3.26 95 0 -20 20 40 Iout (mA) 3.4 Vout (V) Vst 0.8 Vhold 3.2 3.1 100 3.0 Iout 50mA 50 0.2 1mA 20 30 Iout (mA) 40 50 90 Vout 3.3 0.4 10 80 Vin=1.8V 3.5 1.2 60 Load transient response 3.6 1.4 0 0 100 Frequency 3.22 -40 1000 120 115 3.24 Vin=1.8V 50 0.1 1000 Vout, Frequency-Top 3.30 80 100 3.32 90 Efficiency (%) 1 3.34 Vin=2.4V Vst, Vhold (V) Vin=1.5V Vin=1.8V 3.0 2.4 0.6 Vin=1.1V 3.1 Frequency (kHz) 2.6 Vin=0.9V 3.2 0 2 4 1mA 6 Iout (mA) Iout=10mA 2.8 1.0 Vin=2.4V 3.3 3.0 Vout (V) Vout (V) 3.2 2.2 0.0 Vout-Iout 3.5 0 8 10 12 14 16 18 20 Time (ms) Rev.1.2 15 - 14 ELM95xxxxE CMOS PWM step-up DC/DC converter http://www.elm-tech.com �ELM9550BxE (VOUT=5.0V, Fosc=100kHz, Duty=77%) L=100�H, CIN=Cout=47�F, D=DB2J208, Top=25� • ELM9550BxE(Vout=5.0V, Fosc=100kHz, Duty=77%) L=100µH, Cin=Cout=47µF, D=DB2J208, Top=25°C Vout-Vin 5.2 Iout=1mA 5.0 5.1 4.6 Iout=10mA 4.4 Iout=60mA 4.2 Vin=1.1V 4.8 Vin=1.5V Vin=1.8V 2.0 3.0 4.0 Vin (V) 4.6 0.1 5.0 Efficiency-Iout 1 Vin=3.0V, Iout=10mA Vout (V) Vin=0.9V Vin=1.1V Vin=1.5V Vin=1.8V 60 Vout 110 105 4.96 4.92 1 10 Iout (mA) 100 95 4.84 -40 1000 Vst, Vhold-Iout 1.6 0 -20 20 40 Iout (mA) 5.1 Vout (V) 1.0 0.8 5.0 4.9 4.8 100 Iout Vhold 50mA 50 0.2 1mA 10 20 30 Iout (mA) 40 50 90 Vout 4.7 0.6 80 Vin=3.0V 5.2 Vst 60 Load transient response 5.3 1.4 0 0 100 Frequency 4.88 50 0.1 120 115 5.00 70 1000 5.04 90 80 100 Vout, Frequency-Top 5.08 Vin=3.0V 10 Iout (mA) Frequency (kHz) 1.0 100 Efficiency (%) Vin=0.9V 0 2 4 1mA 6 Iout (mA) 3.8 0.0 Vst, Vhold (V) 4.9 4.7 4.0 0.4 Vin=3.0V 5.0 Vout (V) Vout (V) 4.8 1.2 Vout-Iout 5.2 0 8 10 12 14 16 18 20 Time (ms) Rev.1.2 15 - 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