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Analog Devices Semiconductor Electronic Components Datasheet

LTC3119HFE Datasheet

5A Synchronous Buck-Boost DC/DC Converter

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LTC3119
18V, 5A Synchronous
Buck-Boost DC/DC Converter
Features
nn Input Voltage Range: 2.5V to 18V
nn Runs Down to VIN = 250mV After Start-Up
nn Output Voltage Range: 0.8V to 18V
nn 5A Output Current in Buck Mode, VIN > 6V
nn 3A Output Current for VIN = 3.6V, VOUT = 5V
nn Programmable Switching Frequency: 400kHz to 2MHz
nn Synchronizable with an External Clock Up to 2MHz
nn Accurate Run Comparator Threshold
nn Burst Mode® Operation, No-Load IQ = 35µA
nn Ultralow Noise Buck-Boost PWM
nn Current Mode Control
nn Maximum Power Point Control
nn Power Good Indicator
nn Internal Soft-Start
nn 28-Lead 4mm × 5mm QFN and TSSOP Packages
Applications
nn Wide Input Range Power Supplies
nn 1- to 4-Cell Lithium Battery Powered Products
nn RF Power Supplies
nn Solar Battery Chargers
nn System Backup Power Supplies
nn Lead Acid to 12V Regulator
Description
The LTC®3119 is a high efficiency 18V monolithic buck-
boost converter that can deliver up to 5A of continuous
output current. Extensive feature integration and very
low resistance internal power switches minimize the total
solution footprint for even the most demanding applica-
tions. A proprietary 4-switch PWM architecture provides
seamless low noise operation from input voltages above,
equal to, or below the output voltage.
External frequency programming as well as synchroniza-
tion using an internal PLL enable operation over a wide
switching frequency range of 400kHz to 2MHz. The wide
2.5V to 18V input range is well suited for operation from
unregulated power sources including battery stacks and
backup capacitors. After start-up, operation is possible
with input voltages as low as 250mV.
Other features include: output short-circuit protection,
thermal overload protection, less than 3µA shutdown
current, power good indicator, Burst Mode operation, and
maximum power point control.
The LTC3119 is offered in thermally enhanced 28-lead
4mm × 5mm QFN and TSSOP packages.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
and PowerPath and No RSENSE are trademarks of Analog Devices, Inc. All other trademarks are
the property of their respective owners.
Typical Application
Wide Input Range 5V Regulator
3.3µH
VIN
2.5V TO 18V
10µF
0.1µF
SW1
SW2
BST1
BST2
100k
PVIN
PVOUT
VIN LTC3119
RUN
BURST PWM
4.7µF
PWM/SYNC
FB
MPPC
VCC
PGOOD
SVCC
RT
PGND GND
VC
105k
3119 TA01a
0.1µF
150µF
VOUT
5V AT 5A, VIN > 6V
5V AT 3A, VIN = 3.6V
536k
102k
78.7k
680pF
For more information www.linear.com/LTC3119
Efficiency Efficiency
100 Burst Mode OPERATION
90
80
70
60
50
PWM
40
30
20
10
100μ
VIN = 3V
VIN = 5V
VIN = 9V
1m 10m 100m
LOAD CURRENT (A)
1
10
3119 TA01b
3119fb
1


Analog Devices Semiconductor Electronic Components Datasheet

LTC3119HFE Datasheet

5A Synchronous Buck-Boost DC/DC Converter

No Preview Available !

LTC3119
Absolute Maximum Ratings (Note 1)
VIN, PVIN, PVOUT, RUN, PGOOD.................. –0.3V to 19V
FB, VC, RT, SYNC, MPPC, VCC, SVCC............ –0.3V to 6V
BST1 Voltage...................... (SW1 – 0.3V) to (SW1 + 6V)
BST2 Voltage......................(SW2 – 0.3V) to (SW2 + 6V)
Operating Junction Temperature (Notes 2, 3)
LTC3119E/LTC3119I............................ –40°C to 125°C
LTC3119H........................................... –40°C to 150°C
LTC3119MP........................................ –55°C to 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
FE...................................................................... 300°C
Pin Configuration
TOP VIEW
28 27 26 25 24 23
PGND 1
22 PGND
SW2 2
21 SW1
PVOUT 3
PVOUT 4
SW2 5
29
PGND
20 PVIN
19 PVIN
18 SW1
PGND 6
17 PGND
PGOOD 7
SVCC 8
9
16 VIN
15 RUN
10 11 12 13 14
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
TJMAX = 125°C, θJA = 22°C/W
EXPOSED PAD (PIN 29) IS PGND, MUST BE SOLDERED TO PCB
N/C 1
N/C 2
BST2 3
PGND 4
SW2 5
PVOUT 6
PVOUT 7
SW2 8
PGND 9
PGOOD 10
SVCC 11
FB 12
VC 13
SGND 14
TOP VIEW
29
PGND
28 PWM/SYNC
27 N/C
26 BST1
25 PGND
24 SW1
23 PVIN
22 PVIN
21 SW1
20 PGND
19 VIN
18 RUN
17 RT
16 VCC
15 MPPC
FE PACKAGE
28-LEAD PLASTIC TSSOP
TJMAX = 150°C, θJA = 21°C/W
EXPOSED PAD (PIN 29) IS PGND, MUST BE SOLDERED TO PCB
Order Information http://www.linear.com/product/LTC3119#orderinfo
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3119EUFD#PBF
LTC3119EUFD#TRPBF 3119
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LTC3119IUFD#PBF
LTC3119IUFD#TRPBF 3119
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LTC3119EFE#PBF
LTC3119EFE#TRPBF
3119
28-Lead Plastic Enhanced TSSOP
–40°C to 125°C
LTC3119IFE#PBF
LTC3119IFE#TRPBF
3119
28-Lead Plastic Enhanced TSSOP
–40°C to 125°C
LTC3119HFE#PBF
LTC3119HFE#TRPBF
3119
28-Lead Plastic Enhanced TSSOP
–40°C to 150°C
LTC3119MPFE#PBF
LTC3119MPFE#TRPBF 3119
28-Lead Plastic Enhanced 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/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
3119fb
2
For more information www.linear.com/LTC3119


Part Number LTC3119HFE
Description 5A Synchronous Buck-Boost DC/DC Converter
Maker Analog Devices
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