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LTC3114-1_15

Description
40V, 1A Synchronous Buck-Boost DC/DC Converter with Programmable Output Current
File Size387KB,34 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet View All

LTC3114-1_15 Overview

40V, 1A Synchronous Buck-Boost DC/DC Converter with Programmable Output Current

LTC3114-1
40V, 1A Synchronous
Buck-Boost DC/DC Converter with
Programmable Output Current
FEATURES
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DESCRIPTION
The
LTC
®
3114-1
is a versatile, wide operating voltage range
synchronous monolithic buck-boost DC/DC converter with
programmable average output current. The LTC3114-1’s
proprietary buck-boost PWM control circuitry delivers low
noise operation across the entire operating voltage range.
Current mode control ensures exceptional line and load
transient responses.
Synchronous, internal MOSFET switches and pin select-
able Burst Mode operation maintain high efficiency across
the entire range of load current. Average output current
is programmed with a standard resistor and provides the
basis for wide input range, high efficiency charging systems
or constant current, high efficiency LED drive. Regulator
turn-on is programmable through the accurate RUN pin.
Quiescent current is just 3µA in shutdown. Overtempera-
ture protection, short-circuit protection and soft-start are
integrated. The LTC3114-1 is offered in 16-lead 3mm
×
5mm
×
0.75mm DFN and 16 lead TSSOP (FE) packages.
L,
LT, LTC, LTM, Burst Mode, LTspice, µModule, Linear Technology and the Linear logo are
registered trademarks and No R
SENSE
is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Regulates V
OUT
Above, Below or Equal to V
IN
Single Inductor
Wide V
IN
Range: 2.2V to 40V
Wide V
OUT
Range: 2.7V to 40V
1A Output Current in Buck Mode
0.5A Output Current, V
IN
= 3.6V, V
OUT
= 5V
Programmable Average Output Current
Up to 96% Efficiency
Burst Mode
®
Operation, 30µA No-Load I
Q
Current Mode Control
1.2MHz Ultralow Noise PWM
Accurate RUN Pin Threshold
Thermally Enhanced, 16-lead 3mm
×
5mm DFN
and TSSOP Packages
APPLICATIONS
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24V/28V Industrial Power Supply
12V Lead-Acid to 12V Regulator
High Power LED Driver
12V/24V Solar Panel Battery Charging Systems
Automotive Power Systems
TYPICAL APPLICATION
Efficiency vs Input Voltage
6.8µH
68nF
SW1
SW2
BST2
BST1
LTC3114-1
V
IN
PV
OUT
PV
IN
RUN
PROG
MODE
GND
LDO
PLDO
FB
VC
PGND
68nF
V
OUT
5V
1A
30µF V > 5V
IN
95
90
EFFICIENCY (%)
85
V
IN
2.7V TO 40V
10µF
4.7µF
2M
80
4700pF
27.4k
33nF
20k
499k
31141 TA01a
75
I
LOAD
= 300mA
I
LOAD
= 600mA
1
10
INPUT VOLTAGE (V)
40
31141 TA01b
70
31141fa
For more information
www.linear.com/LTC3114-1
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