LTC3130/LTC3130-1
25V, 600mA Buck-Boost
DC/DC Converter with
1.6A Quiescent Current
FEATURES DESCRIPTION
n
Regulates V Above, Below or Equal to V The LTC3130/LTC3130-1 are high efficiency, low noise,
OUT IN
n
Wide V Range: 2.4V to 25V, 600mA buck-boost converters with wide V and V
IN IN OUT
<1V to 25V (Using EXTV Input) ranges. For high efficiency operation at light loads,
CC
n
V Range: 1V to 25V BurstMode operation can be selected, reducing the quies-
OUT
n
Adjustable Output Voltage (LTC 3130) cent current to just 1.6A. Converter start-up is achieved
n
Four Selectable Fixed Output Voltages (LTC3130-1) from sources as low as 7.5W.
n
1.2A No-Load Input Current in Burst Mode
The LTC3130/LTC3130-1 employ an ultralow noise, 1.2MHz
Operation (V = 12V, V = 5V)
IN OUT
PWM architecture that minimizes solution footprint by
n
600mA Output Current in Buck Mode
allowing the use of tiny, low profile inductors and ceramic
n
Pin-Selectable 850mA/450mA Current Limit (LTC3130)
capacitors. Built-in loop compensation and soft-start
n
Up to 95% Efficiency
reduces external parts count and simplifies the design.
n
Pin-Selectable Burst Mode Operation
Features include an accurate RUN comparator threshold to
n
1.2MHz Ultralow Noise PWM Frequency
allow predictable regulator turn-on and a maximum power
n
Accurate RUN Pin Threshold
point control (MPPC) capability that ensures maximum
n
Power Good Indicator
power extraction from non-ideal sources such as photo-
n
Programmable Maximum Power Point Control
voltaic panels. The LTC3130-1 includes an internal voltage
n
I = 500nA in Shutdown
Q
divider to provide four selectable fixed output voltages.
n
Thermally-Enhanced 20-Lead 3mm 4mm QFN and
Additional features include a power good output, an external
16-Lead MSOP Packages
V input and thermal shutdown.
CC
APPLICATIONS
The LTC3130 and LTC3130-1 are available in thermally-
enhanced 20-lead 3mm 4mm QFN and 16-lead MSOP
n
Long-Life, Battery-Operated Instruments
packages.
n
Portable Military Radios
n
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
Low Power Sensors
and PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the
n
Solar Panel Post-Regulator/Charger
property of their respective owners.
TYPICAL APPLICATION Efficiency vs Load
100
22nF 22nF
6.8H
90
80
V
IN
4 Li-Ion BST1 SW1 SW2 BST2
V 70
OUT
PV V 12V
IN OUT
60
600mA
10F V 10F
IN
50
RUN EXTV
CC
LTC3130-1
40
+
V
MPPC
CC
30
MODE PGOOD
20
VS1
10
VS2 V
CC
V = 14.4V, V = 12V
IN OUT
GND PGND 0
4.7F
0.01 0.1 1 10 100 800
LOAD (mA)
3130 TA01a
3130 TA01b
3130f
1
For more information www.linear.com/LTC3130
EFFICIENCY (%)LTC3130/LTC3130-1
(Notes 1, 8)
ABSOLUTE MAXIMUM RATINGS
PV V , V Voltage .............................0.3 to 27.5V Operating Junction Temperature
IN , IN OUT
EXTV Voltage .........................................0.3 to 27.5V Range (Notes 2, 5, 6) ......................... 40C to 125C
CC
BST1, BST2 Voltage ...............(SW 0.3V) to (SW + 6V) Storage Temperature Range .................. 65C to 150C
RUN, PGOOD Voltage .................................0.3 to 27.5V Lead Temperature (Soldering, 10sec)
MODE, MPPC ................................................. 0.3 to 6V MSE ..................................................................300C
VS1, VS2 Voltage (LTC3130-1) ....................... 0.3 to 6V
ILIM, FB Voltage (LTC3130) ........................... 0.3 to 6V
PGOOD Sink Current ..............................................12mA
PIN CONFIGURATION
TOP VIEW
20 19 18 17
TOP VIEW
BST1 1 16 BST2
GND 1 16 SW2
PV 2 15 SW2
IN
BST1 2 15 BST2
V V SW1 3 14 V
3 14 OUT
IN OUT
21
PV 4 17 13 PGOOD
IN
GND
RUN 4 13 PGOOD
V 5 GND 12 EXTV
IN CC
RUN 6 11 MODE
V 5 12 EXTV
CC CC
V 7 10 VS1/ILIM
CC
MPPC 6 11 MODE MPPC 8 9 VS2/FB
MSE PACKAGE
7 8 9 10
16-LEAD PLASTIC MSOP
T = 125C, = 40C/W, = 10C/W (NOTE 6)
JMAX JA JC
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
UDC PACKAGE
20-LEAD (3mm 4mm) PLASTIC QFN
T = 125C, = 52C/W, = 6.8C/W (NOTE 6)
JMAX JA JC
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB