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Linear Technology Electronic Components Datasheet

LTC3118IFE Datasheet

2A Buck-Boost DC/DC Converter

No Preview Available !

Features
nn Integrated High Efficiency Dual Input PowerPath™
Plus Buck-Boost DC/DC Converter
nn Ideal Diode or Priority VIN Select Modes
nn VIN1 and VIN2 Range: 2.2V to 18V
nn VOUT Range: 2V to 18V
nn Either VIN Can Be Above, Below or Equal to VOUT
nn Generates 5V at 2A for VIN > 6V
nn 1.2MHz Low Noise Fixed Frequency Operation
nn Current Mode Control
nn All Internal N-Channel MOSFETs
nn Pin-Selectable PWM or Burst Mode® Operation
nn Accurate, Independent RUN Pin Thresholds
nn Up to 94% Efficiency
nn VIN and VOUT Power Good Indicators
nn IQ of 50µA in Sleep, 2µA in Shutdown
nn 4mm × 5mm 24-Lead QFN or 28-Lead TSSOP Packages
Applications
nn Systems with Multiple Input Sources
nn Back Up Power Systems
nn Wall Adapter or Li-Ion(s) Input to 5VOUT
nn Battery or Super Capacitor Input for Reserve Power
nn Replace Diode-OR Designs with Higher Efficiency,
Flexibility and Performance
LTC3118
18V, 2A Buck-Boost DC/DC
Converter with Low Loss
Dual Input PowerPath
Description
The LTC®3118 is a dual-input, wide voltage range syn-
chronous buck-boost DC/DC converter with an intelligent,
integrated, low loss PowerPath control. The unique power
switch architecture provides efficient operation from either
input source to a programmable output voltage above,
below or equal to the input. Voltage capability of up to 18V
provides flexibility and voltage margin for a wide variety
of applications and power sources.
The LTC3118 uses a low noise, current mode architecture
with a fixed 1.2MHz PWM mode frequency that minimizes
the solution footprint. For high efficiency at light loads,
automatic Burst Mode operation can be selected consum-
ing only 50µA of quiescent current in sleep.
System level features include ideal diode or VIN priority
modes, VIN and VOUT power good indicators, accurate RUN
comparators to program independent UVLO thresholds,
and output disconnect in shutdown. Other features include
2µA shutdown current, short-circuit protection, soft-start,
current limit and thermal overload protection.
The LTC3118 is offered in thermally enhanced 24-lead
4mm × 5mm QFN and 28-lead TSSOP packages.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
and PowerPath and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners. Protected by U.S. Patents, including 7709976.
Typical Application
3.3µH
0.1µF
0.1µF
VIN1
22µF 47nF VIN1 BST1 SW1
SW2 BST2 VOUT
400k
CM1
FB
22pF
CP1
10nF
CN1
CN2
10nF
LTC3118
100k
1.8nF
40.2k
VC
CP2
V1GD
VIN2
VIN2
22µF
V2GD
PGD
MODE
INDICATORS
CM2
47nF
PGND VCC GND
SEL
RUN1
RUN2
CONTROL
SIGNALS
4.7µF
3118 TA01a
VOUT
5V
100µF
5VOUT
AC-COUPLED
500mV/DIV
Input Switchover Response
VIN1 = 5V, VIN2 = 12V, VOUT = 5V AT 1A
SW1
10V/DIV
SEL
5V/DIV SELECT VIN2
SELECT VIN1
100µs/DIV
3118 TA01b
For more information www.linear.com/LTC3118
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Linear Technology Electronic Components Datasheet

LTC3118IFE Datasheet

2A Buck-Boost DC/DC Converter

No Preview Available !

LTC3118
Absolute Maximum Ratings (Note 1)
VIN1, VIN2 Voltage........................................ –0.3V to 20V
VOUT Voltage............................................... –0.3V to 20V
SW1 DC Voltage (Note 4)................–0.3V to (VIN1 + 0.3V)
or (VIN2 + 0.3V)
SW2 DC Voltage (Note 4).............–0.3V to (VOUT + 0.3V)
BST1 Voltage...................... (SW1 – 0.3V) to (SW1 + 6V)
BST2 Voltage .....................(SW2 – 0.3V) to (SW2 + 6V)
RUN1, RUN2 Voltage................................... –0.3V to 20V
PGD, V1GD, V2GD Voltage.......................... –0.3V to 20V
CM1, CM2 Voltage........................................ –0.3 to 20V
CP1 Voltage......................... (VIN1 – 0.3V) to (VIN1 + 6V)
CP2 Voltage......................... (VIN2 – 0.3V) to (VIN2 + 6V)
VCC, CN1, CN2 Voltage.................................... –0.3 to 6V
MODE, SEL, FB, VC Voltage............................ –0.3 to 6V
Operating Junction Temperature Range (Notes 2, 3)
LTC3118E/LTC3118I............................ –40°C to 125°C
LTC3118H........................................... –40°C to 150°C
LTC3118MP......................................... –55°C to 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) TSSOP....... 300°C
Pin Configuration
TOP VIEW
SEL 1
VIN1 2
RUN1 3
RUN2 4
VCC 5
MODE 6
GND 7
24 23 22 21 20
19 CP2
25
PGND
18 VIN2
17 SW1
16 BST1
15 BST2
14 SW2
13 VOUT
8 9 10 11 12
UFD PACKAGE
24-LEAD (4mm × 5mm) PLASTIC QFN
TJMAX = 150°C, θJC = 3.4°C/W, θJA = 43°C/W
EXPOSED PAD (PIN 25) IS PGND, MUST BE SOLDERED TO PCB
TOP VIEW
CM1 1
CN1 2
CP1 3
SEL 4
VIN1 5
RUN1 6
RUN2 7
VCC 8
MODE 9
GND 10
GND 11
VC 12
FB 13
V1GD 14
29
PGND
28 CM2
27 CN2
26 PGND
25 CP2
24 VIN2
23 SW1
22 BST1
21 BST2
20 SW2
19 VOUT
18 PGND
17 PGND
16 PGD
15 V2GD
FE PACKAGE
28-LEAD PLASTIC TSSOP
TJMAX = 150°C, θJC = 5°C/W, θJA = 30°C/W
EXPOSED PAD (PIN 29) IS PGND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3118EUFD#PBF
LTC3118EUFD#TRPBF 3118
24-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LTC3118IUFD#PBF
LTC3118IUFD#TRPBF 3118
24-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LTC3118HUFD#PBF
LTC3118HUFD#TRPBF 3118
24-Lead (4mm × 5mm) Plastic QFN
–40°C to 150°C
LTC3118MPUFD#PBF
LTC3118MPUFD#TRPBF 3118
24-Lead (4mm × 5mm) Plastic QFN
–55°C to 150°C
LTC3118EFE#PBF
LTC3118EFE#TRPBF
3118FE
28-Lead Plastic TSSOP
–40°C to 125°C
LTC3118IFE#PBF
LTC3118IFE#TRPBF
3118FE
28-Lead Plastic TSSOP
–40°C to 125°C
LTC3118HFE#PBF
LTC3118HFE#TRPBF
3118FE
28-Lead Plastic TSSOP
–40°C to 150°C
LTC3118MPFE#PBF
LTC3118MPFE#TRPBF 3118FE
28-Lead Plastic TSSOP
–55°C to 150°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/
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For more information www.linear.com/LTC3118


Part Number LTC3118IFE
Description 2A Buck-Boost DC/DC Converter
Maker Linear
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