LTC3407-2 Datasheet, PDF (13/16 Pages) Linear Technology – Dual Synchronous, 800mA, 2.25MHz Step-Down DC/DC Regulator

TYPICAL APPLICATIO S
LTC3407-2
Low Ripple Buck Regulators Using Ceramic Capacitors
V_IN = 2.5V
TO 5.5V
C1
10µF
V_OUT2 = 1.8V
AT 800mA
L2
4.7µH
C5, 22pF
RUN2 V_IN RUN1
POR
LTC3407-2
SW2
SW1
R5
100k
POWER-ON
RESET
L1
4.7µH
C4, 22pF
C3
10µF
R4
887k R3
442k
V_FB2
V_FB1
MODE/SYNC GND
R2
R1 604k
604k
V_OUT1 = 1.2V
AT 800mA
C2
10µF
C1, C2, C3: TAIYO YUDEN JMK316BJ106ML
L1, L2: SUMIDA CDRH2D18/HP-4R7NC
3407 TA03
Efficiency vs Load Current
100
95
1.8V
90
85
1.2V
80
75
70
65
60 _{VIN = 3.3V}
55 ^{PULSE SKIP MODE}
NO LOAD ON OTHER CHANNEL
50
10
100
LOAD CURRENT (mA)
1000
3407 TA03b
sn34072 34072fs
13