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