ELM91xxxxA CMOS PFM Step-up DC/DC converter and controller
L=100μH, Cin=Cout=47μF, D=MA2Z748, Vss=0V, Top=25°C
Condition Min. Typ. Max. Unit
4.875 5.000 5.125
ELM91501xA
Parameter
Symbol
Vout Iout=1mA, Vin=3V
Vin
Output voltage
Input voltage
Starting voltage
Holding voltage
Current consumption 1
Current consumption 2
On-resistance of LX switch
Leakage current of LX pin
Oscillating frequency
Voltage limit of LX pin
(LX switch ON)
V
V
0.9
6.0
0.9
0.7
45
5
Vst Iout=1mA
V
Vhold Iout=1mA
V
Iss1 Vout=Vout(T)×0.95
Iss2 Vout=Vout(T)+0.5V
Ron Vout=Vout(T)×0.95
Ilxl Vout=Vlx=6V
Fosc Vout=Vout(T)×0.95
20
2
μA
μA
Ω
μA
kHz
0.7
1.5
1
120
80
0.5
67
100
0.7
75
Vlxlim Vout=Vout(T)×0.95
0.9
83
V
Duty ratio
Duty Vout=Vout(T)×0.95
%
Vout: Input voltage to out pin;
Vout(T): Typ. value of Vout.
*
■Electrical characteristics (ELM91xx3xA)
FET=ELM37400FA, L=33μH, Cin=Cout=100μF, D=MA735, Vss=0V, Top=25°C
Symbol Condition Min. Typ. Max. Unit
ELM91183xA
Parameter
Output voltage
Input voltage
Starting voltage
Holding voltage
Current consumption 1
Current consumption 2
On-resistance of EXT “High”
On-resistance of EXT “Low”
Oscillating frequency
Duty ratio
Vout Iout=1mA, Vin=1.5V
Vin
Vst Iout=1mA
1.755 1.800 1.845
V
V
V
0.9
6.0
1.1
0.7
25
Vhold Iout=1mA
V
Iss1 Vout=Vout(T)×0.95, EXT: No-Load
Iss2 Vout=Vout(T)+0.5V
Rexth Vout=Vout(T)×0.95, Vext=Vout-0.4V
Rextl Vout=Vout(T)×0.95, Vext=0.4V
Fosc Vout=Vout(T)×0.95
Duty Vout=Vout(T)×0.95
Vout(T): Typ. value of Vout.
10
2
μA
μA
Ω
5
90
70
100
75
170
120
120 kHz
83
Ω
80
67
%
Vout: Input voltage to out pin;
*
FET=ELM37400FA, L=33μH, Cin=Cout=100μF, D=MA735, Vss=0V, Top=25°C
Symbol Condition Min. Typ. Max. Unit
ELM91303xA
Parameter
Output voltage
Input voltage
Starting voltage
Holding voltage
Current consumption 1
Current consumption 2
On-resistance of EXT “High”
On-resistance of EXT “Low"
Oscillating frequency
Duty ratio
Vout Iout=1mA, Vin=1.5V
Vin
Vst Iout=1mA
2.925 3.000 3.075
V
V
V
0.9
6.0
1.1
0.7
35
5
Vhold Iout=1mA
V
Iss1 Vout=Vout(T)×0.95, EXT: No-Load
Iss2 Vout=Vout(T)+0.5V
Rexth Vout=Vout(T)×0.95, Vext=Vout-0.4V
Rextl Vout=Vout(T)×0.95, Vext=0.4V
Fosc Vout=Vout(T)×0.95
Duty Vout=Vout(T)×0.95
Vout(T): Typ. value of Vout.
14
2
μA
μA
Ω
50
36
100
75
86
60
Ω
80
67
120 kHz
83
%
Vout: Input voltage to out pin;
*
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