Datasheet

LTC3411
16
sn3411 3411fs
Figure 7. General Purpose Buck Regulator Using Ceramic Capacitors
SV
IN
LTC3411
PGOOD PGOOD
SW
PV
IN
SYNC/MODE V
FB
I
TH
SHDN/R
T
SGND
L1
2.2µH
V
IN
2.63V TO
5.5V
V
OUT
1.8V/2.5V/3.3V
AT 1.25A
R5
100k
R4
324k
R1A
280k
R3
13k
RS1
1M
BM
RS2
1M
3411 F07a
C3
1000pF
C4 22pF
R2 887K
C2
22µF
SGND SGND
R1B
412k
R1C
698k
PS
FC
PGND
C1
22µF
PGND
PGNDSGND
NOTE: IN DROPOUT, THE OUTPUT TRACKS THE INPUT VOLTAGE
C1, C2: TAIYO YUDEN JMK325BJ226MM
L1: TOKO A914BYW-2R2M (D52LC SERIES)
GND
3.3V 2.5V 1.8V
LOAD CURRENT (mA)
EFFICIENCY (%)
100
95
90
85
80
75
70
65
60
1 100 1000 10000
3411 F07b
10
PULSE SKIP
(PS)
FORCED
CONTINUOUS (FC)
V
IN
= 3.3V
V
OUT
= 2.5V
f
O
= 1MHz
Burst Mode
OPERATION (BM)
TYPICAL APPLICATIO S
U
Efficiency vs Load Current