LTC3411_15 Datasheet, PDF (20/24 Pages) Linear Technology – 1.25A, 4MHz, Synchronous Step-Down DC/DC Converter

LTC3411
TYPICAL APPLICATIONS
All Ceramic 2-Cell to 3.3V and 1.8V Converters
V_IN = 2V TO 3V
L1
4.7μH
+₂
CELLS
C1
10μF
LTC3402
V_IN
SW
SHDN
V_OUT
MODE/SYNC FB
PGOOD
V_C
R_T
GND
49.9k
D1
1000pF
10pF
47k
V_OUT
3.3V
120mA/1A
C5
22μF
1M
604k
C2
44mF
(2 s 22mF)
13k
SV_IN
PV_IN
SYNC/MODE
PGOOD
SW
LTC3411
I_TH
SHDN/R_T
V_FB
SGND PGND
1000pF
324k
L2
2.2μH
887k
412k
V_OUT
1.8V/1.2A
C6
22μF
0 = FIXED FREQ
1 = Burst Mode OPERATION
C1: TAIYO YUDEN JMK212BJ106MG
C2: TAIYO YUDEN JMK325BJ226MM
C5, C6: TAIYO YUDEN JMK325BJ226MM
D1: ON SEMICONDUCTOR MBRM120LT3
L1: TOKO A916CY-4R7M
L2: TOKO A914BYW-2R2M (D52LC SERIES)
3411 TA06
Efficiency vs Load Current
100
95
3.3V
1.8V
90
85
80
75
70
65 _{VIN = 2.4V}
Burst Mode OPERATION
60
10
100
1000
LOAD CURRENT (mA)
10000
3211 TA07
3411fb
20