Datasheet

LTC3035
10
3035f
Efficiency vs Output Current Ripple Rejection
SW1
SW2
V
IN
V
OUT
SHDN/SS
FB
MODE/SYNC
V
C
R
T
R
T
60.4k
4
6
9
10
5
3
7
8
2
*
*1 = Burst Mode OPERATION
0 = FIXED FREQUENCY
C1: TAIYO YUDEN JMK212BJ106MG
C2: TAIYO YUDEN JMK325BJ226MM
C
IN
, C
BIAS
, C
OUT
: TDK C1005X5R0J105K
L1: SUMIDA CDRH6D38-100
1
GND
LTC3440
IN
BIAS
CP
CM
SHDN
OUT
GND
ADJ
LTC3035
SS
S
S
S S
S
S
S
S
S S
S
3035 TA02
C1
10µF
V
IN
= 2.7V TO 4.2V
C5 1.5nF
R3
15k
L1
10µH
Li-Ion
OFF ON
C2
22µF
C
IN
1µF
S
R2
200k
R1
357k
3.4V
600mA
C
BIAS
1µF
C
OUT
1µF
0.1µF
S
294k
V
OUT
= 3.3V
I
OUT
≤ 300mA
40.2k
+
Low Noise Li-Ion to 3.3V Supply
TYPICAL APPLICATIO
U
OUTPUT CURRENT (mA)
0.1
Burst Mode IS A REGISTERED TRADEMARK OF
LINEAR TECHNOLOGY CORPORATION
0
EFFICIENCY (%)
10
30
40
50
100
70
1
10
3035 TA02b
20
80
90
60
100
1000
Burst Mode
®
OPERATION
V
IN
= 2.7V
V
IN
= 4.2V
V
IN
= 3.6V
LTC3440
OUTPUT
AC
20mV/DIV
LTC3035
OUTPUT
AC
20mV/DIV
20µs/DIVI
OUT
= 25mA
3035 TA02c