LTC3407-4 Linear Technology, LTC3407-4 Datasheet - Page 13

• Manufacturer Part Number: LTC3407-4
• Description: Dual Synchronous 800mA 2.25MHz Step-Down DC/DC Regulator
• Manufacturer: Linear Technology

800mA
800mA
TYPICAL APPLICATIO S
V
V
OUT2
OUT2
1.8V
3.3V
10µF
10µF
2.5V TO 5.5V
3.6V TO 5.5V
C3
C3
C1, C2, C3: TAIYO YUDEN JMK212BJ106MD-B
L1, L2: COILTRONICS LPO3310-222MX
*IF C1 IS GREATER THAN 3" FROM POWER SOURCE,
C1, C2, C3: TAIYO YUDEN JMK316BJ106ML
ADDITIONAL CAPACITANCE MAY BE REQUIRED.
V
V
IN
IN
Low Ripple Buck Regulators Using Ceramic Capacitors
C5, 100pF
C5, 22pF
887k
887k
R4
R4
442k
196k
C1
10µF
C1*
10µF
4.7µH
2.2µH
R3
R3
L2
L2
1mm Height Core Supply
SW2
V
MODE/SYNC
MODE/SYNC
SW2
V
RUN2
FB2
RUN2
FB2
LTC3407-4
LTC3407-4
GND
V
V
U
IN
IN
GND
RUN1
RUN1
L1, L2: SUMIDA CDRH2D18/HP-4R7NC
SW1
SW1
POR
V
POR
V
FB1
FB1
4.7µH
2.2µH
L1
L1
R5
100k
R1
604k
R5
100k
R1
301k
C4, 22pF
C4, 22pF
POWER-ON
RESET
POWER-ON
RESET
604k
604k
R2
R2
3407 TA03
3407 TA07
C2
10µF
C2
10µF
V
1.2V
800mA
V
1.8V
800mA
OUT1
OUT1
100
100
95
90
85
60
55
50
80
75
70
65
95
90
85
80
75
70
65
60
55
50
10
1
V
PULSE SKIP MODE
NO LOAD ON OTHER CHANNEL
V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
IN
IN
V
= 3.6V
Efficiency vs Load Current
= 5V
Efficiency vs Load Current
OUT
V
OUT
= 1.8V
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LOAD CURRENT (mA)
= 3.3V
V
LOAD CURRENT (mA)
OUT
10
LTC3407-4
= 1.8V
V
100
OUT
= 1.2V
100
13
34074 TA03b
34074 TA08
34074f
1000
1000