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KB3440EMS Scheda tecnica(PDF) 3 Page - Kingbor Technology Co

Il numero della parte KB3440EMS
Spiegazioni elettronici  Micropower Synchronous Buck-Boost DC/DC Converter
PDF  20 Pages
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Produttore elettronici  KINGBOR [Kingbor Technology Co]
Homepage  http://www.kingbor.com
Logo KINGBOR - Kingbor Technology Co

KB3440EMS Scheda tecnica(HTML) 3 Page - Kingbor Technology Co

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



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