ELM92xxxx
CMOS 600kHz High output current PWM step-up DC/DC converter
■Standard circuit
• ELM92xx1x
• ELM92xx2x
■Block diagram
■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
Symbol
Vin
Vst
Vout1
Vout2
Iss1
Iss2
Fosc
Duty
Fimt
Ron
Ilxl
Vout=Vout(T)×0.95
Vout=Vlx=7V
L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C
Condition
Min.
Typ.
Max. Unit Note
7
V
No-load
0.9
V
1
Iout=60mA, Vin=1.5V
2.633 2.700 2.767
V
1
Vout1 Vout1 Vout1
Iout=0.1mA, Vin=1.5V
V
1
×1.005 ×1.010 ×1.020
Vout=Vout(T)×0.95
280
450
μA
2
Vout=Vout(T)+ 0.5V
70
110
μA
2
Vout=Vout(T)×0.95
510
600
690
kHz
3
Vout=Vout(T)×0.95
80
88
95
%
3
12
270
17
370
1
kHz
mΩ
μA
3
4
5
: input voltage to VOUT pin
* Vout
* Vout(T) : typical value of Vout1
* Remarks : test circuit No
15 - 3
ELM-TECH [ ELM Technology Corporation ]
