FEATURES
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LTC3130/LTC3130-1
25V, 600mA Buck-Boost
DC/DC Converter with
1.6µA Quiescent Current
DESCRIPTION
The
LTC3130/LTC3130-1
are high efficiency, low noise,
600mA buck-boost converters with wide V
IN
and V
OUT
ranges. For high efficiency operation at light loads,
Burst Mode operation can be selected, reducing the quies-
cent current to just 1.6µA. Converter start-up is achieved
from sources as low as 7.5µW.
The LTC3130/LTC3130-1 employ an ultralow noise, 1.2MHz
PWM architecture that minimizes solution footprint by
allowing the use of tiny, low profile inductors and ceramic
capacitors. Built-in loop compensation and soft-start
reduces external parts count and simplifies the design.
Features include an accurate RUN comparator threshold to
allow predictable regulator turn-on and a maximum power
point control (MPPC) capability that ensures maximum
power extraction from non-ideal sources such as photo-
voltaic panels. The LTC3130-1 includes an internal voltage
divider to provide four selectable fixed output voltages.
Additional features include a power good output, an external
V
CC
input and thermal shutdown.
The LTC3130 and LTC3130-1 are available in thermally-
enhanced 20-lead 3mm
×
4mm QFN and 16-lead MSOP
packages.
L,
LT, LTC, LTM, Linear Technology, the Linear logo 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.
n
n
n
n
n
n
n
n
n
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Regulates V
OUT
Above, Below or Equal to V
IN
Wide V
IN
Range: 2.4V to 25V,
<1V to 25V (Using EXTV
CC
Input)
V
OUT
Range: 1V to 25V
Adjustable Output Voltage (LTC
®
3130)
Four Selectable Fixed Output Voltages (LTC3130-1)
1.2µA No-Load Input Current in Burst Mode
®
Operation (V
IN
= 12V, V
OUT
= 5V)
600mA Output Current in Buck Mode
Pin-Selectable 850mA/450mA Current Limit (LTC3130)
Up to 95% Efficiency
Pin-Selectable Burst Mode Operation
1.2MHz Ultralow Noise PWM Frequency
Accurate RUN Pin Threshold
Power Good Indicator
Programmable Maximum Power Point Control
I
Q
= 500nA in Shutdown
Thermally-Enhanced 20-Lead 3mm
×
4mm QFN and
16-Lead MSOP Packages
APPLICATIONS
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Long-Life, Battery-Operated Instruments
Portable Military Radios
Low Power Sensors
Solar Panel Post-Regulator/Charger
TYPICAL APPLICATION
22nF
V
IN
4 Li-Ion
10µF
6.8µH
22nF
BST1
PV
IN
V
IN
RUN
MPPC
MODE
VS1
VS2
GND
PGND
3130 TA01a
Efficiency vs Load
100
90
80
V
OUT
12V
10µF 600mA
SW1
SW2
EFFICIENCY (%)
BST2
V
OUT
EXTV
CC
PGOOD
V
CC
70
60
50
40
30
20
10
V
IN
= 14.4V, V
OUT
= 12V
0.1
1
10
LOAD (mA)
100
800
3130 TA01b
+
LTC3130-1
V
CC
4.7µF
0
0.01
For more information
www.linear.com/LTC3130
1
3130f
LTC3130/LTC3130-1
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 8)
PV
IN ,
V
IN
, V
OUT
Voltage .............................–0.3 to 27.5V
EXTV
CC
Voltage .........................................–0.3 to 27.5V
BST1, BST2 Voltage ............... (SW – 0.3V) to (SW + 6V)
RUN, PGOOD Voltage.................................–0.3 to 27.5V
MODE, MPPC ................................................. –0.3 to 6V
VS1, VS2 Voltage (LTC3130-1) ....................... –0.3 to 6V
ILIM, FB Voltage (LTC3130) ........................... –0.3 to 6V
PGOOD Sink Current ..............................................12mA
Operating Junction Temperature
Range (Notes 2, 5, 6) ......................... –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10sec)
MSE .................................................................. 300°C
PIN CONFIGURATION
TOP VIEW
PGND
PGND
SW1
NC
20 19 18 17
BST1 1
PV
IN
2
V
IN
3
RUN 4
V
CC
5
MPPC 6
7
GND
8
GND
9 10
VS1/ILIM
VS2/FB
21
GND
16 BST2
15 SW2
14 V
OUT
13 PGOOD
12 EXTV
CC
11 MODE
GND
BST1
SW1
PV
IN
V
IN
RUN
V
CC
MPPC
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
SW2
BST2
V
OUT
PGOOD
EXTV
CC
MODE
VS1/ILIM
VS2/FB
17
GND
MSE PACKAGE
16-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 40°C/W,
θ
JC
= 10°C/W (NOTE 6)
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
UDC PACKAGE
20-LEAD (3mm × 4mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 52°C/W,
θ
JC
= 6.8°C/W (NOTE 6)
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC3130EUDC#PBF
LTC3130EUDC-1#PBF
LTC3130IUDC#PBF
LTC3130IUDC-1#PBF
LTC3130EMSE#PBF
LTC3130EMSE-1#PBF
LTC3130IMSE#PBF
LTC3130IMSE-1#PBF
TAPE AND REEL
LTC3130EUDC#TRPBF
http://www.linear.com/product/LTC3130#orderinfo
PART MARKING*
LGTS
LGTT
LGTS
LGTT
3130
31301
3130
31301
PACKAGE DESCRIPTION
20-Lead (3mm
×
4mm) Plastic QFN
20-Lead (3mm
×
4mm) Plastic QFN
20-Lead (3mm
×
4mm) Plastic QFN
20-Lead (3mm
×
4mm) Plastic QFN
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
LTC3130EUDC-1#TRPBF
LTC3130IUDC#TRPBF
LTC3130IUDC-1#TRPBF
LTC3130EMSE#TRPBF
LTC3130EMSE-1#TRPBF
LTC3130IMSE#TRPBF
LTC3130IMSE-1#TRPBF
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.
2
3130f
For more information
www.linear.com/LTC3130
LTC3130/LTC3130-1
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). PV
IN
= V
IN
= 12V, V
OUT
= 5V unless otherwise noted.
PARAMETER
V
IN
Start-Up Voltage
Input Voltage Range
Output Voltage Adjust Range (LTC3130)
Feedback Voltage (LTC3130)
CONDITIONS
EXTV
CC
= 0V
EXTV
CC
> 3.15V, RUN > 1.1V
EXTV
CC
> 3.15V, RUN > 1.1V
MIN
l
l
l
l
l
ELECTRICAL CHARACTERISTICS
TYP
2.30
0.6
For External FB Resistor Applications
From –40°C to +85°C (Note 3)
Feedback Input Current (LTC3130)
FB = 1.1V
VS1 = VS2 = 0V
Fixed V
OUT
Voltages (LTC3130-1)
VS1 = V
CC
, VS2 = 0V
VS1 = 0V, VS2 = V
CC
VS1 = VS2 = V
CC
V
IN
Quiescent Current – Shutdown
RUN < 0.2V
0.85V < RUN < 0.9V, EXTV
CC
= 0V
V
IN
Quiescent Current – UVLO
V
IN
Quiescent Current – Burst Mode Operation FB > 1.02V (LTC3130), V
OUT
> V
REG
(LTC3130-1),
(Sleeping)
MODE = 0V, RUN = V
IN
, MPPC > 1.05V
SW1 = SW2 = 0V, V
IN
= V
OUT
= 25V
NMOS Switch Leakage on V
IN
and V
OUT
NMOS Switch On-Resistance
V
CC
= 4V
Inductor Average Current Limit
LTC3130-1 (Note 4), LTC3130: ILIM = V
CC
(Note 4)
LTC3130: ILIM = 0V (Note 4)
Inductor Peak Current Limit
LTC3130-1 (Note 4), LTC3130: ILIM = V
CC
(Note 4)
LTC3130: ILIM = 0V (Note 4)
Maximum Boost Duty Cycle
LTC3130-1: V
OUT
< V
REG
(Note 7),
LTC3130: FB < 0.975V (Note 7)
(Percentage of Period SW2 is Low)
Minimum Duty Cycle
LTC3130-1: V
OUT
> V
REG
(Note 7),
LTC3130: FB > 1.02V (Note 7)
Switching Frequency
SW1 and SW2 Minimum Low Time
(Note 3)
MPPC Reference Voltage
MPPC Input Current
MPPC = 5V
RUN Logic Threshold to Enable Reference
RUN Threshold to Enable Switching (Rising)
V
IN
> 2.4V or EXTV
CC
> 3.15V
RUN Threshold Hysteresis
RUN Input Current
RUN = 25V
RUN = 1V
ILIM Input Logic High
(LTC3130)
ILIM Input Logic Low
(LTC3130)
ILIM Input Current
(LTC3130) ILIM = 5V
VS1, VS2 Input Logic High
(LTC3130-1)
VS1, VS2 Input Logic Low
(LTC3130-1)
VS1, VS2 Input Current
(LTC3130-1) VS1, VS2 = 5V
MODE Input Logic High
MODE Input Logic Low
MODE Input Current
MODE = 5V (If RUN is Low or V
CC
is in UVLO)
MODE = 5V (If Switching is Enabled)
0.6
1.0
0.975
0.980
1.75
3.20
4.85
11.64
l
l
l
l
1.000
1.000
0.1
1.80
3.3
5.0
12.0
500
1.4
1.6
5
0.35
850
450
1.3
0.85
94
MAX
2.40
1.0
25
25
1.020
1.020
10
1.85
3.39
5.125
12.30
850
2.4
2.7
100
1200
650
1.7
1.15
97
0
UNITS
V
V
V
V
V
V
nA
V
V
V
V
nA
µA
µA
nA
Ω
mA
mA
A
A
%
%
MHz
ns
V
nA
V
V
mV
nA
nA
V
V
nA
V
V
nA
V
V
nA
µA
l
l
l
l
l
l
l
660
250
0.9
0.6
91
1.00
0.95
0.2
1.01
90
l
l
l
l
1.20
70
1.00
1
0.6
1.05
100
1
0.1
1.40
1.05
20
0.85
1.09
110
30
5
0.35
20
0.35
20
0.35
20
4
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l
1.1
1
l
l
1.1
1
l
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1.1
1
1.7
For more information
www.linear.com/LTC3130
3
3130f
LTC3130/LTC3130-1
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). PV
IN
= V
IN
= 12V, V
OUT
= 5V unless otherwise noted.
PARAMETER
Soft-Start Time
V
CC
Voltage
V
CC
Voltage -– Shutdown
V
CC
Dropout Voltage (V
IN
– V
CC
)
V
CC
Current Limit
V
CC
UVLO Threshold (Rising)
V
CC
UVLO Hysteresis
EXTV
CC
Enable Threshold
EXTV
CC
Enable Hysteresis
EXTV
CC
Input Operating Range
EXTV
CC
Quiescent Current – Burst Mode
Operation (Sleeping)
EXTV
CC
Quiescent Current – Shutdown
EXTV
CC
Current Limit
V
IN
Sleep Current When Powered by EXTV
CC
CONDITIONS
For Average Inductor Current to Reach Limit
(EXTV
CC
or V
IN
) > 4.7V, RUN > 0.85V
RUN ≤ 0.2V
V
IN
= 3.0V, Switching
V
CC
= 0V
l
ELECTRICAL CHARACTERISTICS
MIN
l
2.20
100
2.85
3.15
TYP
12
4
3.25
50
17
2.3
120
3.0
260
1.6
400
32
600
MAX
100
34
2.40
135
3.15
25
2.5
750
68
l
V
OUT
UV Threshold
V
OUT
UV Hysteresis
V
OUT
Quiescent Current – Shutdown
V
OUT
Quiescent Current – Burst Mode
Operation (Sleeping)
PGOOD Threshold, Rising
PGOOD Hysteresis
PGOOD Voltage Low
PGOOD Leakage
EXTV
CC
> 3.15V, FB >1.02V (LTC3130), MPPC > 1.05V
V
OUT
> V
REG
(LTC3130-1), MODE = 0V, RUN > 1.10V
EXTV
CC
= 5V, RUN < 0.2V
V
CC
= 0V, EXTV
CC
= 15V
FB > 1.02V (LTC3130), V
OUT
> V
REG
(LTC3130-1),
EXTV
CC
> 3.15V, MODE = 0V,
RUN >1.10V, V
IN
= 12V, MPPC > 1.05V
Rising
UNITS
ms
V
V
mV
mA
V
mV
V
mV
V
µA
nA
mA
nA
l
0.35
0.7
55
(V
OUT
–1)
27
(V
OUT
–1)
0.95
(V
OUT
)
17
(V
OUT
)
17
–3.0
250
50
V
mV
µA
µA
%
%
mV
nA
MODE = 0V, FB > 1.02V, MPPC > 1.05V
Referenced to Programmed V
OUT
Voltage
Referenced to Programmed V
OUT
Voltage
I
SINK
= 1mA
PGOOD = 25V
–7.0
27
–5.0
2.5
165
1
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The LTC3130/LTC3130-1 is tested under pulsed load conditions
such that T
J
≈ T
A
. The LTC3130E/LTC3130E-1 is guaranteed to meet
specifications from 0°C to 85°C junction temperature. Specifications over
the –40°C to 125°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
The LTC3130I/LTC3130I-1 is guaranteed over the –40°C to 125°C
operating junction temperature range. The junction temperature (T
J
) is
calculated from the ambient temperature (T
A
) and power dissipation (P
D
)
according to the formula:
T
J
= T
A
+ (P
D
•
θ
JA
°C/W),
where
θ
JA
is the package thermal impedance. Note that the maximum
ambient temperature consistent with these specifications is determined by
specific operating conditions in conjunction with board layout, the rated
thermal package thermal resistance and other environmental factors.
Note 3:
Specification is guaranteed by design and not 100% tested in
production.
Note 4:
Current measurements are made when the output is not switching.
Note 5:
This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 165°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may result in device degradation or failure.
Note 6:
Failure to solder the exposed backside of the package to the PC
board ground plane will result in a much higher thermal resistance.
Note 7:
Switching time measurements are made in an open-loop test
configuration. Timing in the application may vary somewhat from these values due
to differences in the switch pin voltage during non-overlap durations when switch
pin voltage is influenced by the magnitude and duration of the inductor current.
Note 8:
Voltage transients on the switch pin(s) beyond the DC limits
specified in the Absolute Maximum Ratings are non-disruptive to normal
operation when using good layout practices as described elsewhere in the
data sheet and application notes and as seen on the product demo board.
3130f
4
For more information
www.linear.com/LTC3130
LTC3130/LTC3130-1
TYPICAL PERFORMANCE CHARACTERISTICS
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
0
0.01
0.1
1
10
100
LOAD CURRENT (mA)
1k
3130 G01
T
A
= 25°C, unless otherwise noted.
Efficiency, V
OUT
= 5V,
vs Load, V
OUT
PWM Mode
= 5V, PWM Mode
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 12V
V
IN
= 24V
Efficiency, V
OUT
= 1.8V,
vs Load, V
OUT
PWM Mode
= 1.8V, PWM Mode
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 12V
V
IN
= 24V
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
Efficiency, V
OUT
= 3.3V,
PWM Mode
OUT
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 12V
V
IN
= 24V
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
0
0.01
0.1
1
10
100
LOAD CURRENT (mA)
1k
3130 G02
0
0.01
0.1
1
10
100
LOAD CURRENT (mA)
1k
3130 G03
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
Efficiency, V
OUT
= 12V,
PWM Mode
OUT
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 12V
V
IN
= 24V
100
90
80
Efficiency, V
OUT
= 1.8V, Burst
Mode Operation (LTC3130-1)
OUT
1k
100
POWER LOSS (mW)
10
1
0.1
0.01
Power Loss, V
OUT
= 1.8V, Burst
Mode Operation (LTC3130-1)
OUT
EFFICIENCY (%)
70
60
50
40
30
20
10
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 12V
V
IN
= 24V
0.1
1
10
100
LOAD CURRENT (mA)
1k
3130 G05
0
0.01
0.1
1
10
100
LOAD CURRENT (mA)
1k
3130 G04
0
0.01
0.001
0.01
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 12V
V
IN
= 24V
0.1
1
10
100
LOAD CURRENT (mA)
1k
3130 G06
100
90
80
Efficiency, V
OUT
= 3.3V, Burst
Mode Operation (LTC3130-1)
OUT
1k
100
POWER LOSS (mW)
10
1
0.1
0.01
Power Loss, V
OUT
= 3.3V, Burst
Mode Operation (LTC3130-1)
OUT
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
1k
3130 G08
Efficiency, V
OUT
= 5V, Burst Mode
Operation (LTC3130-1)
OUT
EFFICIENCY (%)
70
60
50
40
30
20
10
0
0.01
0.1
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 12V
V
IN
= 24V
1
10
100
LOAD CURRENT (mA)
1k
3130 G07
0.001
0.01
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 12V
V
IN
= 24V
0.1
1
10
100
LOAD CURRENT (mA)
0
0.01
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 12V
V
IN
= 24V
0.1
1
10
100
LOAD CURRENT (mA)
1k
3130 G09
For more information
www.linear.com/LTC3130
5
3130f
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