Datasheet

LTC3407A
14
3407afa
TYPICAL APPLICATIONS
Figure 3. 1mm Height Core Supply
Effi ciency vs Load Current
Figure 4. Low Ripple Buck Regulators Using Ceramic Capacitors
Effi ciency vs Load Current
RUN/SS2 V
IN
V
IN
= 2.5V
TO 5.5V
V
OUT2
= 2.5V
AT 600mA
V
OUT1
= 1.8V
AT 600mA
RUN/SS1
POR
SW1
V
FB1
GND
V
FB2
SW2
MODE/SYNC
LTC3407A
C1
10µF
R5
100k
POWER-ON
RESET
C4, 22pFC5, 22pF
L1
2.2µH
L2
2.2µH
R4
887k
R2
604k
R1
301k
R3
280k
C3
10µF
C2
10µF
3407A TA03
C1, C2, C3: TAIYO YUDEN JMK316BJ106MD
L1, L2: TDK VLF3010AT-2R2M1R0
LOAD CURRENT (mA)
1
0
EFFICIENCY (%)
30
20
10
70
60
50
40
100
90
80
10 100 1000
3407A TA04
2.5V
V
IN
= 3.3V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
1.8V
RUN/SS2
V
IN
V
IN
= 2.5V TO 5.5V
V
OUT2
= 1.8V
AT 600mA
V
OUT1
= 1.2V
AT 600mA
RUN/SS1
POR
SW1
V
FB1
GND
V
FB2
SW2
MODE/SYNC
LTC3407A
C
IN
10µF
R7
100k
R6
4.7MΩ
R5
4.7MΩ
POWER-ON
RESET
C1, 22pFC2, 22pF
L1
4.7µH
L2
4.7µH
R4
887k
R2
604k
R1
604k
R3
442k
C
OUT2
10µF
C4
680pF
C3
680pF
C
OUT1
10µF
3407A TA05
C
IN
, C
OUT1
, C
OUT2:
TAIYO YUDEN JMK316BJ106ML L1, L2: TDK VLF3010AT-4R7MR70
LOAD CURRENT (mA)
1
0
EFFICIENCY (%)
30
20
10
70
60
50
40
100
90
80
10 100 1000
3407A TA06
1.8V
V
IN
= 3.3V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
2.5V