Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
kB3440
The ● denotes specifications that apply over the full operating temperature
ELECTRICAL CHARACTERISTICS
range, otherwise specifications are at TA = 25°C. VIN = VOUT = 3.6V, RT = 60k, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SHDN/SS Threshold
When IC is Enabled
When EA is at Maximum Boost Duty Cycle
●
0.4
1
2.2
1.5
V
V
SHDN/SS Input Current
V
= 5.5V
0.01
1
µA
SHDN
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 3: Current measurements are performed when the outputs are not
switching.
Note 2: The kB3440E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 85°C operating
TYPICAL PERFORMANCE CHARACTERISTICS
Li-Ion to 3.3V Efficiency
(fOSC = 300kHz)
Li-Ion to 3.3V Efficiency
(fOSC = 2MHz)
Li-Ion to 3.3V Efficiency,
Power Loss (fOSC = 1MHz)
100
90
80
70
60
50
40
30
20
1000
100
10
100
100
90
80
70
60
50
40
30
20
Burst Mode
OPERATION
90 Burst Mode
OPERATION
80
Burst Mode
OPERATION
V
IN
= 4.2V
V
= 4.2V
IN
70
V
IN
= 2.5V
V
IN
= 3.3V
V
IN
= 4.2V
V
= 2.5V
V
= 3.3V
IN
V
IN
= 2.5V
IN
60
50
40
30
20
V
IN
= 3.3V
V
IN
= 3.3V
1
f
= 2MHz
OSC
100
OUTPUT CURRENT (mA)
f
= 1MHz
OSC
100
OUTPUT CURRENT (mA)
f
= 300kHz
1
OSC
0.1
1000
0.1
1
10
1000
0.1
1
10
0.1
10
100
1000
OUTPUT CURRENT (mA)
Switch Pins on the Edge of
Buck/Boost and Approaching Boost
Switch Pins on the Edge of
Buck/Boost and Approaching Buck
Switch Pins During Buck/Boost
SW1
2V/DIV
SW1
2V/DIV
SW1
2V/DIV
SW2
2V/DIV
SW2
2V/DIV
SW2
2V/DIV
VIN = 3.78V
VOUT = 3.3V
IOUT = 250mA
50ns/DIV
VIN = 3.42V
VOUT = 3.3V
IOUT = 250mA
50ns/DIV
VIN = 4.15V
VOUT = 3.3V
IOUT = 250mA
50ns/DIV
3
KINGBOR [ KINGBOR TECHNOLOGY CO ]
