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參數資料
| 型號： | LTC3105EMS#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING REGULATOR, PDSO12 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-12 |
| 文件頁數： | 1/18頁 |
| 文件大小： | 1913K |
| 代理商： | LTC3105EMS#PBF |
LTC3105
1
3105fa
TYPICAL APPLICATION
FEATURES
DESCRIPTION
400mA Step-Up DC/DC
Converter with Maximum Power
Point Control and 250mV Start-Up
TheLTC3105isahighefficiencystep-upDC/DCconverter
that can operate from input voltages as low as 225mV. A
250mVstart-upcapabilityandintegratedmaximumpower
pointcontroller(MPPC)enableoperationdirectlyfromlow
voltage,highimpedancealternativepowersourcessuchas
photovoltaic cells, TEGs (thermoelectric generators) and
fuelcells.AuserprogrammableMPPCsetpointmaximizes
the energy that can be extracted from any power source.
Burst Mode operation, with a proprietary self adjusting
peak current, optimizes converter efficiency and output
voltage ripple over all operating conditions.
The AUX powered 6mA LDO provides a regulated rail for
external microcontrollers and sensors while the main
output is charging. In shutdown, IQ is reduced to 10A
and integrated thermal shutdown offers protection from
overtemperature faults. The LTC3105 is offered in 10-lead
3mm × 3mm × 0.75mm DFN and 12-lead MSOP packages.
Output Current vs Input Voltage
APPLICATIONS
n
Low Start-Up Voltage: 250mV
n
Maximum Power Point Control
n
Wide VIN Range: 225mV to 5V
n
Auxiliary 6mA LDO Regulator
n
Burst Mode Operation: IQ = 24A
n
Output Disconnect and Inrush Current Limiting
n
VIN > VOUT Operation
n
Antiringing Control
n
Soft Start
n
Automatic Power Adjust
n
Power Good Indicator
n
10-Lead 3mm × 3mm × 0.75mm DFN and 12-Lead
MSOP Packages
n
Solar Powered Battery/Supercapacitor Chargers
n
Energy Harvesting
n
Remote Industrial Sensors
n
Low Power Wireless Transmitters
n
Cell Phone, MP3, PMP and GPS Accessory Chargers
L
, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
3105 TA01a
10F
Li-Ion
1020k
225mV TO 5V
VOUT
4.1V
332k
FB
PGOOD
LDO
FBLDO
MPPC
VIN
SHDN
AUX
SW
VOUT
4.7F
2.2V
40.2k
1F
LTC3105
GND
10F
10H
PHOTOVOLTAIC
CELL
ON
OFF
+
–
Single Photovoltaic Cell Li-Ion Trickle Charger
INPUT VOLTAGE (V)
0.2
0
OUTPUT
CURRENT
(mA)
20
40
60
0.3 0.4 0.5 0.6
0.8
0.7
0.9
80
10
30
50
70
1.0
3105 TA01b
VOUT = 5V
VOUT = 3.3V
VOUT = 4.2V
MPPC DISABLED
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