POWER LOSS (mW)
LTC3106
300mA Low Voltage
Buck-Boost Converter with
PowerPath and 1.6A Quiescent Current
Fea T Descrip T
n
Dual Input Buck-Boost with Integrated PowerPath The LTC 3106 is a highly integrated, ultralow voltage buck-
Manager boost DC/DC converter with automatic PowerPath man-
n
Ultralow Start-Up Voltages: 850mV Start with No agement optimized for multisource, low power systems.
Backup Source, 300mV with a Backup Source At no load, the LTC3106 draws only 1.6A while creating
n
Compatible with Primary or Rechargeable Backup an output voltage up to 5V from either input source.
Batteries
If the primary power source is unavailable, the LTC3106
n
Digitally Selectable V and V
OUT STORE
seamlessly switches to the backup power source. The
n
Maximum Power Point Control
LTC3106 is compatible with either rechargeable or pri-
n
Ultralow Quiescent Current: 1.6A
mary cell batteries and can trickle charge a backup battery
n
Regulated Output with V or V Above, Below
IN STORE
whenever there is an energy surplus available. Optional
or Equal to the Output
maximum power point control ensures power transfer is
n
Optional Backup Battery Trickle Charger
optimized between power source and load. The output volt-
n
Shelf Mode Disconnect Function to Preserve Battery
age and backup voltage, V , are programmed digitally,
STORE
Shelf Life
reducing the required number of external components.
n
Burst Mode Operation
Zero power Shelf Mode ensures that the backup battery
n
Accurate RUN Pin Threshold
will remain charged if left connected to the LTC3106 for
n
Power Good Output Voltage Indicator
an extended time.
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Selectable Peak Current Limit: 90mA/650mA
n Additional features include an accurate turn-on voltage, a
Available in Thermally Enhanced 3mm 4mm 16-Pin
power good indicator for V , a user selectable 100mA
QFN and 20-Pin TSSOP Packages
OUT
peak current limit setting for lower power applications,
a T
thermal shutdown as well as user selectable backup power
and output voltages.
n
Wireless Sensor Networks
n
L, LT, LTC, LTM, Linear Technology, the Linear logo, Eterna and Burst Mode are registered
Home or Office Building Automation
trademarks and PowerPath is a trademark of Linear Technology Corporation. All other
n
Energy Harvesting
trademarks are the property of their respective owners. Protected by U.S. Patents, including
7432695 and 6366066.
n
Remote Sensors
Typical a T
Efficiency vs Input Voltage
Solar Cell Input with Primary Battery Backup
100 110
I = 50mA
OUT
10H 95 100
90
90
85
SW1 SW2
80
3.6V V V
80
STORE AUX
70
+
10F 2.2F
TL-5955 V
CAP
75 V EFF.
IN
PRIMARY ENVSTR
60
V P.L.
IN
70
RUN
BATTERY
V EFF. 50
STR
3.3V
65
V V V P.L.
IN OUT STR
50mA
40
600mV TO 5V 60
+ 47F
LTC3106
470F 1M
1F
PV CELLS 30
55
PGOOD
PGOOD
20
50
V
MPP CC
V
CC 10
45
ILIMSEL
PRI
40 0
GND
0.01F
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
3106 TA01a
INPUT VOLTAGE (V)
LTC3106 TA01b
3106f
1
For more information www.linear.com/LTC3106
EFFICIENCY (%)
ion pplica
ions pplica
ion uresLTC3106
a T e Maxi Mu M r a T (Notes 1, 6)
Supply Voltages Storage Temperature Range .................. 65C to 150C
V , V , V , V ........................... 0.3V to 6V Lead Temperature (Soldering, 10 sec)
IN STORE OUT CAP
All Other Pins ............................................... 0.3V to 6V FE Package .......................................................300C
Operating Junction Temperature Range
(Notes 2, 3) ............................................ 40C to 125C
p c F T
TOP VIEW
TOP VIEW
V 1 20 SW1
STORE
20 19 18 17 V 2 19 SW2
CAP
V 3 18 V
OUT IN
NC 1 16 V
IN
NC 4 17 GND
V 2 15 GND
OUT
V 3 14 ENVSTR V 5 16 ENVSTR
AUX
AUX 21
21
GND
GND
V 4 13 RUN
V 6 15 RUN
CC CC
OS1 5 12 ILIMSEL
OS1 7 14 ILIMSEL
OS2 6 11 PRI
OS2 8 13 PRI
7 8 9 10
PGOOD 9 12 SS1
MPP 10 11 SS2
FE PACKAGE
UDC PACKAGE
20-LEAD PLASTIC TSSOP
20-LEAD (3mm 4mm) PLASTIC QFN
T = 125C, = 48.6C/W, = 8.6C/W (Note 5)
JMAX JA JC
T = 125C, = 52C/W, = 7C/W (Note 5)
JMAX JA JC
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
o r D i n F Ma T
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3106EUDC#PBF LTC3106EUDC#TRPBF LGQH 20-Lead (3mm 4mm) Plastic QFN 40C to 125C
LTC3106IUDC#PBF LTC3106IUDC#TRPBF LGQH 20-Lead (3mm 4mm) Plastic QFN 40C to 125C
LTC3106EFE#PBF LTC3106EFE#TRPBF LTC3106FE 20-Lead Plastic TSSOP 40C to 125C
LTC3106IFE#PBF LTC3106IFE#TRPBF LTC3106FE 20-Lead Plastic TSSOP 40C to 125C
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: