Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB3408
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VIN = 3.6V unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
1
MAX
1.5
1
UNITS
V
V
RUN Threshold
RUN Leakage Current
●
●
0.3
RUN
RUN
I
0.01
µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 3: T is calculated from the ambient temperature T and power
J A
dissipation P according to the following formula:
D
Note 2: The KB3408 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.
KB3408: T = T + (P )(250°C/W)
J A D
Note 4: The KB3408 is tested in a proprietary test mode that connects
to the output of the error amplifier.
V
FB
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
TYPICAL PERFORMANCE CHARACTERISTICS
(From Figure1a Except for the Resistive Divider Resistor Values)
Efficiency vs Input Voltage
Efficiency vs Output Current
Efficiency vs Output Current
100
95
90
85
80
75
70
65
60
55
50
95
90
85
80
75
70
65
60
95
90
85
80
75
70
65
60
V
OUT
= 1.2V
V
= 1.5V
OUT
I
= 100mA
OUT
I
= 10mA
OUT
V
IN
= 2.7V
V
= 2.7V
IN
I
= 1mA
OUT
V
= 4.2V
IN
V
IN
= 4.2V
I
= 350mA
OUT
V
IN
= 3.6V
V
IN
= 3.6V
I
= 0.1mA
OUT
V
= 1.8V
3
OUT
2
4
INPUT VOLTAGE (V)
5
6
0.1
1
10
100
500
0.1
1
10
100
500
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
Reference Voltage vs
Temperature
Oscillator Frequency vs
Temperature
Efficiency vs Output Current
0.614
0.609
0.604
0.599
0.594
0.589
0.584
1.70
1.65
1.60
1.55
1.50
1.45
1.40
1.35
1.30
100
95
90
85
80
75
70
65
60
V
= 2.5V
OUT
V
= 3.6V
IN
V
= 3.6V
IN
V
= 2.7V
IN
V
= 3.6V
IN
V
= 4.2V
IN
50
100 125
50
TEMPERATURE (°C)
100 125
–50 –25
0
25
75
–50
25
75
–25
0
0.1
1
10
100
500
OUTPUT CURRENT (mA)
TEMPERATURE (°C)
March 2007
3
KINGBOR [ KINGBOR TECHNOLOGY CO ]
