Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
kB3440
TYPICAL APPLICATION
Li-Ion to 3.3V at 600mA Buck-Boost Converter
Efficiency
L1
10µH
V
OUT
100
90
80
70
60
50
40
30
20
10
0
3.3V
220pF
2.2k
600mA
Burst Mode
OPERATION
3
7
8
2
1
4
6
9
SW1
kB3440
SW2
R1
V
= 2.8V TO 4.2V
IN
340k
V
V
OUT
IN
V
= 4.2V
IN
V
= 3.3V
SHDN/SS
FB
IN
C2
22µF
C5 300pF
10
+
MODE/SYNC
V
C
*
C1
10µF
Li-Ion
R3
15k
5
R2
200k
R
GND
T
R
T
60.4k
*1 = Burst Mode OPERATION
0 = FIXED FREQUENCY
C1: TAIYO YUDEN JMK212BJ106MG
C2: TAIYO YUDEN JMK325BJ226MM
L1: SUMIDA CDRH4D28-100
0.1
1.0
10
100
1000
OUTPUT CURRENT (mA)
Kingbor Technology
20
TEL:(86)0755-26508846 FAX:(86)0755-26509052 www.kingbor.com
KINGBOR [ KINGBOR TECHNOLOGY CO ]
