LTC3407-2 Datasheet, PDF (14/16 Pages) Linear Technology – Dual Synchronous, 800mA, 2.25MHz Step-Down DC/DC Regulator

LTC3407-2
TYPICAL APPLICATIO S
2mm Height Core Supply
V_IN = 3.6V
TO 5.5V
C1*
4.7µF
V_OUT2 = 3.3V
AT 800mA
L2
2.2µH
C5, 22pF
RUN2 V_IN RUN1
MODE/SYNC
POR
LTC3407-2
SW2
SW1
R5
100k
POWER-ON
RESET
L1
2.2µH
C4, 22pF
C3
4.7µF
×2
R4
887k R3
196k
V_FB2
GND
V_FB1
C1, C2, C3: TDK C1608X5ROJ475M
L1, L2: CMD4D11-2R2
*IF C1 IS GREATER THAN 3" FROM POWER SOURCE,
ADDITIONAL CAPACITANCE MAY BE REQUIRED.
R2
R1 604k
301k
Efficiency vs Load Current
100
95
3.3V
90
85
1.8V
80
75
70
65
V_IN = 5V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
60
1
10
100
LOAD CURRENT (mA)
1000
3407 TA08
V_OUT1 = 1.8V
AT 800mA
C2
4.7µF
×2
3407 TA07
14
sn34072 34072fs