SAMHOP Microelectronics Corp.
1.2MHz STEP-UP CONVERTER
ELECTRICAL CHARACTERISTICS
(TA =25oC , VIN =3V, VSHDN = 3V, unless otherwise noted)
Characteristic
Minimum operating voltage
Maximum operating voltage
Feedback voltage
Condition
Min. Typ. Max. Unit
2.5
-
-
-
-
V
10
V
ISW =100mA, Duty cycle=66%
86
10
-
95
45
1.9
0.1
1.2
90
320
350
0.01
-
104
100
2.5
1.0
mV
nA
mA
μA
FB pin bias current
Supply current
-
SHDN=0V
Switching frequency
Maximum duty cycle
Switch current limit
Switch VCESAT
0.8
85
-
1.6 MHz
-
-
%
mA
mV
μA
V
ISW =250mA
VSW =5V
-
-
Switch leakage current
SHDN voltage high
SHDN voltage low
SHDN pin bias current
Note :
-
5
-
1.5
-
-
0.4
-
V
-
65
μA
1. Absolute maximum ratings are those values beyond which the life of the device may be impaired.
2. The SM8237 is guatanteed to meet specification from 0 oC to 70 oC. Specification over the -40oC
to 85oC operating temperature range are assured by design, characterization and correlation with
statistical process controls.
Page 3
V.1.3 Aug 28,2007
SAMHOP [ SAMHOP MICROELECTRONICS CORP. ]
