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參數(shù)資料
| 型號： | LTC3105EMS#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, PDSO12 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-12 |
| 文件頁數(shù)： | 4/18頁 |
| 文件大?。?/td> | 1913K |
| 代理商： | LTC3105EMS#TRPBF |
LTC3105
12
3105fa
TEMPERATURE (°C)
–45
MPPC
VOLTAGE
(V)
0.4
–15
15
45
0.2
0.3
0.7
0.1
0
0.6
0.5
–30
0
75 90
30
60
3105 TA02a
25s/DIV
3105 TA02b
INPUT CURRENT
25mA/DIV
OUTPUT CURRENT
5mA/DIV
INPUT VOLTAGE
50mV/DIV
VOUT = 2.8V
VMPPC = 0.4V
VFB = 0.94V
0.38V
10mA
0.7mA
APPLICATIONS INFORMATION
Industrial Current Loops
The low 250mV start-up and low voltage operation of the
LTC3105 allow it to be supplied by power from a diode
placed in an industrial sensor current loop, as shown
in Figure 6. In this application, a large input capacitor
is required due to the very low available supply current
(less than 4mA). The loop diode should be selected for a
minimum forward drop of 300mV. The MPPC pin voltage
should be set for a value approximately 50mV below the
minimum diode forward voltage.
Figure 6. Current Loop Power Tap
3105 F06
GND
MPPC
VIN
LTC3105
CIN
VFWD
RMPPC
4mA TO 20mA
CURRENT LOOP
+
–
3.3V from a Single-Cell Photovoltaic Source with Temperature Tracking
VMPPC vs Temperature
MPPC Response to Input Source Current Step
3105 TA02
COUT
10F
R1
2.26M
VOUT
3.3V
R2
1M
FB
PGOOD
LDO
FBLDO
MPPC
SHDN
AUX
SW
CLDO
4.7F
2.2V
RMPPC
9.09k
CAUX
1F
* MRA4003T3
** COILCRAFT MSS5131-103MX
LTC3105
CMPPC
10nF
GND
CIN
10F
L1**
10H
+
–
ON
OFF
VIN
VOUT
D1*
THERMALLY
COUPLED
TYPICAL APPLICATIONS
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