Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
kB3440
TYPICAL PERFORMANCE CHARACTERISTICS
Switch Pins in Buck Mode
SW1
2V/DIV
SW1
2V/DIV
V
OUT
10mV/DIV
AC Coupled
SW2
2V/DIV
Switch Pins in Boost Mode
V
OUT
Ripple During Buck,
Buck/Boost and Boost Modes
Buck
V
IN
= 5V
Buck/Boost
V
IN
= 3.78V
Boost
V
IN
= 2.5V
SW2
2V/DIV
V
IN
= 5V
V
OUT
= 3.3V
I
OUT
= 250mA
250ns/DIV
V
IN
= 2.5V
V
OUT
= 3.3V
I
OUT
= 250mA
250ns/DIV
L = 10µH
C
OUT
= 22µF
I
OUT
= 250mA
f
OSC
= 1MHz
1µs/DIV
Active Quiescent Current
550
V
IN
= V
OUT
= 3.6V
Burst Mode Quiescent Current
40
V
IN
= V
OUT
= 3.6V
E/A SOURCE CURRENT (µA)
V
IN
+ V
OUT
CURRENT (µA)
Error Amp Source Current
20
V
IN
= V
OUT
= 3.6V
V
IN
+ V
OUT
CURRENT (µA)
500
30
15
450
20
10
400
–55
–25
5
35
65
TEMPERATURE (°C)
95
125
10
–55
–25
5
35
65
TEMPERATURE (°C)
95
125
5
–55
–25
5
35
65
TEMPERATURE (°C)
95
125
Output Frequency
1.10
V
IN
= V
OUT
= 3.6V
0.30
NMOS R
DS(ON)
V
IN
= V
OUT
= 3.6V
SWITCHES B AND C
FEEDBACK VOLTAGE (V)
Feedback Voltage
1.236
V
IN
= V
OUT
= 3V
1.05
FREQUENCY (MHz)
0.25
NMOS R
DS(ON)
( )
1.00
0.20
1.216
0.95
0.15
0.90
–55
–25
5
35
65
TEMPERATURE (°C)
95
125
0.10
–55
–25
5
35
65
TEMPERATURE (°C)
95
125
1.196
–55
–25
5
35
65
TEMPERATURE (°C)
95
125
4
KINGBOR [ KINGBOR TECHNOLOGY CO ]
