ELM91xxxxA CMOS PFM Step-up DC/DC converter and controller
FET=ELM37400FA, L=33μH, Cin=Cout=100μF, D=MA735, Vss=0V, Top=25°C
Symbol Condition Min. Typ. Max. Unit
ELM91333xA
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
3.218 3.300 3.382
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.
15
2
μA
μA
Ω
46
33
100
75
83
55
Ω
80
67
120 kHz
83
%
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
ELM91503xA
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=3V
Vin
Vst Iout=1mA
4.875 5.000 5.125
V
V
V
0.9
6.0
1.1
0.7
45
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.
20
2
μA
μA
Ω
33
24
100
75
59
45
Ω
80
67
120 kHz
83
%
Vout: Input voltage to out pin;
*
■Marking
• SOT-89, SOT-23 package : ELM91xx1xA
ELM91xx3xA
• SC-70 package : ELM91xx1CA
ELM91xx3CA
SOT-89
SOT-23
SC-70
a b
a b c
a b c d
c d
a to d : Assembly lot No.
a to c : Assembly lot No.
A to Z (I, O, X excepted) and 0 to 9
A to Z (I, O, X excepted) and 0 to 9
22 - 5
ELM-TECH [ ELM Technology Corporation ]
