Datasheet

LTC3103
15
3103f
TYPICAL APPLICATIONS
V
IN
C
BST
0.022µF
BST
V
IN
5V TO 9V
MODE SW
RUN
PGOOD
PGOOD
V
CC
FB
LTC3103
GND
R1
442k
L1
10µH
V
OUT
3.3V
300mA
1M
3103 TA02a
47µF
L1: TDK VLC4018
1µF
10µF
R2
2M
C
FF
12pF
Portable LF RFID Reader, Dual Lithium-Ion to 3.3V/300mA
Regulator with Ultralow I
Q
Efficiency vs Output Current
12V to 2.2V/300mA Regulator with 9V Accurate UVLO Start-Up with Ramped Input Power
V
IN
C
BST
0.022µF
BST
V
IN
12V
MODE SW
RUN PGOOD
PGOOD
V
CC
FB
LTC3103
GND
R1
665k
R4
2.05M
R3
200k
L1
10µH
V
OUT
2.2V
300mA
1M
3103 TA03a
47µF
L1: MURATA LQH44PN1
1µF
10µF
R2
1.78M
C
FF
12pF
LOAD CURRENT (A)
80
EFFICIENCY (%)
90
100
70
85
95
0.0001 0.01 0.1 1
3103 TA02b
60
75
65
0.001
V
IN
= 5V
V
IN
= 9V
V
OUT
1V/DIV
V
IN
5V/DIV
I
L
100mA/DIV
20ms/DIV
3103 TA03b