LTC3407A-2 Linear Technology, LTC3407A-2 Datasheet - Page 14

• Manufacturer Part Number: LTC3407A-2
• Description: Dual Synchronous 800mA2.25MHz Step-Down DC/DC Regulator
• Manufacturer: Linear Technology

LTC3407A-2
14
TYPICAL APPLICATIO S
V
OUT2
AT 800mA
R6
4.7MΩ
V
C4
680pF
OUT2
= 2.5V
AT 800mA
10μF
V
IN
C3
= 2.5V
C
= 2.5V TO 5.5V
10μF
OUT2
V
C1, C2, C3: TAIYO YUDEN JMK316BJ106MD
L1, L2: TDK VLF3010AT-2R2M1R0
IN
TO 5.5V
= 2.5V
C
IN
, C
C5, 22pF
Figure 4. Low Ripple Buck Regulators with Soft-Start
OUT1
887k
R4
C2, 22pF
, C
887k
OUT2:
R4
280k
C1
10μF
2.2μH
R3
Figure 3. 1mm Height Core Supply
L2
280k
TAIYO YUDEN JMK316BJ106ML
C
10μF
IN
4.7μH
R3
L2
RUN/SS2
MODE/SYNC
SW2
V
FB2
RUN/SS2
SW2
V
MODE/SYNC
FB2
LTC3407A-2
U
LTC3407A-2
GND
V
IN
V
IN
RUN/SS1
GND
RUN/SS1
SW1
POR
V
FB1
SW1
POR
V
FB1
L1, L2: TDK VLF3012AT-4R7M74
4.7μH
L1
2.2μH
R7
100k
R1
604k
L1
R5
100k
R1
301k
C1, 22pF
POWER-ON
RESET
C4, 22pF
604k
POWER-ON
RESET
R2
604k
R2
C
10μF
V
AT 800mA
OUT1
OUT1
C2
10μF
V
AT 800mA
OUT1
= 1.2V
3407A2 TA03
= 1.8V
680pF
4.7MΩ
C3
3407A2 TA04
R5
100
100
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
0
1
1
2.5V
V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
IN
2.5V
IN
Efficiency vs Load Current
Efficiency vs Load Current
= 3.3V
= 3.3V
www.DataSheet4U.com
LOAD CURRENT (mA)
LOAD CURRENT (mA)
10
10
1.8V
1.2V
100
100
3407A2 TA03b
3407A2 TA04b
3407a2f
1000
1000