Datasheet

LTC3105
14
3105fa
2ms/DIV
3105 TA05a
V
IN
VOLTAGE
50mV/DIV
LOAD CURRENT
2mA/DIV
V
OUT
VOLTAGE
250mV/DIV
50ms/DIV
3105 TA05b
V
IN
VOLTAGE
200mV/DIV
LDO VOLTAGE
500mV/DIV
V
OUT
VOLTAGE
500mV/DIV
100mV
0V
TYPICAL APPLICATIONS
Industrial Sensor 4mA to 20mA Current Loop Power Tap
Transient Response to Load Pulse
with 4mA Loop Current Start-Up V
IN
, V
OUT
, V
LDO
3105 TA05
R1
2M
V
OUT
, 3V
R2
1M
FB
EN
PGOOD
LDO
FBLDO
MPPC
SHDN
AUX
SW
µP
C
AUX
1µF
R
MPPC
28k
280mV
2.2V
C
IN
470µF
4mA TO 20mA
CURRENT LOOP
D1*
L1**
10µH
LTC3105
GND
10µF
V
FWD
= 330mV
R
PG
499k
* MBRS190T3
** COILCRAFT MSS5131-103MX
+
–
ON
OFF
V
IN
V
DD
V
OUT
C
LDO
4.7µF
Single-Cell Photovoltaic NiMH Trickle Charger
3105 TA06
NiMH
× 2
R1
1.02M
V
OUT
3.2V
R2
470k
FB
PGOOD
LDO
FBLDO
MPPC
SHDN
AUX
SW
C
LDO
4.7µF
1.8V
R
MPPC
40.2k
C
AUX
1µF
C
IN
10µF
L1, 10µH
LTC3105
GND
C
OUT
10µF
R3
1M
R4
1.27M
+
+
+
–
ON
OFF
V
IN
V
OUT