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Linear Technology Electronic Components Datasheet

LTC3106 Datasheet

300mA Low Voltage Buck-Boost Converter

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LTC3106
300mA Low Voltage
Buck-Boost Converter with
PowerPath and 1.6µA Quiescent Current
Features
Description
n Dual Input Buck-Boost with Integrated PowerPath™
Manager
n Ultralow Start-Up Voltages: 850mV Start with No
Backup Source, 300mV with a Backup Source
n Compatible with Primary or Rechargeable Backup
Batteries
n Digitally Selectable VOUT and VSTORE
n Maximum Power Point Control
n Ultralow Quiescent Current: 1.6μA
n Regulated Output with VIN or VSTORE Above, Below
or Equal to the Output
n Optional Backup Battery Trickle Charger
n Shelf Mode Disconnect Function to Preserve Battery
Shelf Life
n Burst Mode® Operation
n Accurate RUN Pin Threshold
n Power Good Output Voltage Indicator
n Selectable Peak Current Limit: 90mA/650mA
n Available in Thermally Enhanced 3mm × 4mm 16-Pin
QFN and 20-Pin TSSOP Packages
Applications
n Wireless Sensor Networks
n Home or Office Building Automation
n Energy Harvesting
n Remote Sensors
The LTC®3106 is a highly integrated, ultralow voltage buck-
boost DC/DC converter with automatic PowerPath man-
agement optimized for multisource, low power systems.
At no load, the LTC3106 draws only 1.6µA while creating
an output voltage up to 5V from either input source.
If the primary power source is unavailable, the LTC3106
seamlessly switches to the backup power source. The
LTC3106 is compatible with either rechargeable or pri-
mary cell batteries and can trickle charge a backup battery
whenever there is an energy surplus available. Optional
maximum power point control ensures power transfer is
optimized between power source and load. The output volt-
age and backup voltage, VSTORE, are programmed digitally,
reducing the required number of external components.
Zero power Shelf Mode ensures that the backup battery
will remain charged if left connected to the LTC3106 for
an extended time.
Additional features include an accurate turn-on voltage, a
power good indicator for VOUT, a user selectable 100mA
peak current limit setting for lower power applications,
thermal shutdown as well as user selectable backup power
and output voltages.
L, LT, LTC, LTM, Linear Technology, the Linear logo, Eterna and Burst Mode are registered
trademarks and PowerPath is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents, including
7432695 and 6366066.
Typical Application
Solar Cell Input with Primary Battery Backup
10µH
3.6V
TL-5955
+
PRIMARY
BATTERY
600mV TO 5V
PV CELLS
+
10µF
SW1
VSTORE
VCAP
ENVSTR
RUN
SW2
VAUX
470µF
VIN VOUT
1µF LTC3106
PGOOD
0.01µF
VCC
PRI
MPP
ILIMSEL
GND
3106 TA01a
2.2µF
1M
PGOOD
VCC
3.3V
50mA
47µF
Efficiency vs Input Voltage
100
95
IOUT = 50mA
110
100
90 90
85 80
80 70
75
70
65
60
VIN EFF.
VIN P.L.
VSTR EFF.
VSTR P.L.
60
50
40
55 30
50 20
45 10
40 0
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
INPUT VOLTAGE (V)
LTC3106 TA01b
For more information www.linear.com/LTC3106
3106f
1


Linear Technology Electronic Components Datasheet

LTC3106 Datasheet

300mA Low Voltage Buck-Boost Converter

No Preview Available !

LTC3106
Absolute Maximum Ratings (Notes 1, 6)
Supply Voltages
VIN, VSTORE, VOUT, VCAP............................ –0.3V to 6V
All Other Pins................................................ –0.3V to 6V
Operating Junction Temperature Range
(Notes 2, 3)............................................. –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
FE Package........................................................ 300°C
Pin Configuration
TOP VIEW
NC 1
VOUT 2
VAUX 3
VCC 4
OS1 5
OS2 6
20 19 18 17
16 VIN
15 GND
21 14 ENVSTR
GND 13 RUN
12 ILIMSEL
11 PRI
7 8 9 10
UDC PACKAGE
20-LEAD (3mm × 4mm) PLASTIC QFN
TJMAX = 125°C, θJA = 52°C/W, θJC = 7°C/W (Note 5)
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
VSTORE
VCAP
VOUT
NC
1
2
3
4
VAUX
VCC
OS1
5
6
7
OS2 8
PGOOD 9
MPP 10
TOP VIEW
21
GND
20 SW1
19 SW2
18 VIN
17 GND
16 ENVSTR
15 RUN
14 ILIMSEL
13 PRI
12 SS1
11 SS2
FE PACKAGE
20-LEAD PLASTIC TSSOP
TJMAX = 125°C, θJA = 48.6°C/W, θJC = 8.6°C/W (Note 5)
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3106EUDC#PBF
LTC3106EUDC#TRPBF LGQH
20-Lead (3mm × 4mm) Plastic QFN
–40°C to 125°C
LTC3106IUDC#PBF
LTC3106IUDC#TRPBF LGQH
20-Lead (3mm × 4mm) Plastic QFN
–40°C to 125°C
LTC3106EFE#PBF
LTC3106EFE#TRPBF
LTC3106FE
20-Lead Plastic TSSOP
–40°C to 125°C
LTC3106IFE#PBF
LTC3106IFE#TRPBF
LTC3106FE
20-Lead Plastic TSSOP
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
3106f
2 For more information www.linear.com/LTC3106


Part Number LTC3106
Description 300mA Low Voltage Buck-Boost Converter
Maker Linear Technology
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LTC3106 Datasheet PDF






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