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LT8364 Datasheet

Boost/SEPIC/Inverting Converter

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LT8364 pdf
FEATURES
nn Wide Input Voltage Range: 2.8V to 60V
nn Ultralow Quiescent Current and Low Ripple
Burst Mode® Operation: IQ = 9µA
nn 4A, 60V Power Switch
nn Positive or Negative Output Voltage Programming
with a Single Feedback Pin
nn Programmable Frequency (300kHz to 2MHz)
nn Synchronizable to an External Clock
nn Spread Spectrum Frequency Modulation for Low EMI
nn BIAS Pin for Higher Efficiency
nn Programmable Undervoltage Lockout (UVLO)
nn Thermally Enhanced 12-lead 4mm × 3mm DFN and
16-lead MSOP packages
APPLICATIONS
nn Industrial and Automotive
nn Telecom
nn Medical Diagnostic Equipment
nn Portable Electronics
All registered trademarks and trademarks are the property of their respective owners.
LT8364
Low IQ Boost/SEPIC/
Inverting Converter
with 4A, 60V Switch
DESCRIPTION
The LT®8364 is a current mode DC/DC converter with a
60V, 4A switch operating from a 2.8V to 60V input. With
a unique single feedback pin architecture it is capable
of boost, SEPIC or inverting configurations. Burst Mode
operation consumes as low as 9µA quiescent current to
maintain high efficiency at very low output currents, while
keeping typical output ripple below 15mV.
An external compensation pin allows optimization of loop
bandwidth over a wide range of input and output volt-
ages and programmable switching frequencies between
300kHz and 2MHz. A SYNC/MODE pin allows synchroni-
zation to an external clock. It can also be used to select
between burst or pulse-skip modes of operation with or
without Spread Spectrum Frequency Modulation for low
EMI. For increased efficiency, a BIAS pin can accept a
second input to supply the INTVCC regulator. Additional
features include frequency foldback and programmable
soft-start to control inductor current during startup.
The LT8364 is available in a thermally enhanced 12-lead
4mm × 3mm DFN package or a thermally enhanced
16-lead MSOP package with four pins removed.
TYPICAL APPLICATION
2MHz, 48V Output Boost Converter
VIN
8V TO 38V
3.3μH
4.7µF
VIN SW
LT8364
EN/UVLO
FBX
BIAS
SYNC/MODE
RT SS
INTVCC
GND VC
20k
10nF
36.5k
2.2nF
1µF
1M
34.8k
8364 TA01a
VOUT
48V
300mA AT VIN = 8V
640mA AT VIN = 12V
1A AT VIN = 24V
4.7µF
x2
Efficiency and Power Loss
100 3.0
90 2.7
80 EFFICIENCY
70
2.4
2.1
60 1.8
50 1.5
POWER LOSS
40 1.2
30 0.9
20 0.6
10
VIN = 12V
VIN = 24V
0.3
00
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1
LOAD CURRENT (A)
8364 TA01b
For more information www.linear.com/LT8364
8364f
1


Analog Devices Semiconductor Electronic Components Datasheet

LT8364 Datasheet

Boost/SEPIC/Inverting Converter

No Preview Available !

LT8364 pdf
LT8364
ABSOLUTE MAXIMUM RATINGS
(Note 1)
SW............................................................................. 60V
VIN, EN/UVLO............................................................. 60V
BIAS........................................................................... 40V
EN/UVLO Pin Above VIN Pin, SYNC............................. 6V
INTVCC ................................................................(Note 2)
VC ................................................................................ 4V
FBX............................................................................ ±4V
Operating Junction Temperature (Note 3)
LT8364E, LT8364I...............................–40°C to 125°C
LT8364H..............................................–40°C to 150°C
Storage Temperature Range....................–65°C to 150°C
PIN CONFIGURATION
EN/UVLO 1
TOP VIEW
16 SW1
VIN 3
INTVNCCC
5
6
BIAS 7
VC 8
17
PGND,
GND
14 SW2
12 SYNC/MODE
11 SS
10 RT
9 FBX
MSE PACKAGE
VARIATION: MSE16 (12)
16-LEAD PLASTIC MSOP
θJA = 45°C/W, θJC = 10°C/W
EXPOSED PAD (PIN 17) IS PGND AND GND, MUST BE SOLDERED TO PCB
TOP VIEW
NC
EN/UVLO
VIN
INTVCC
BIAS
VC
1
2
3
4
5
6
12 SW1
11 SW2
13 10 SYNC/MODE
GND 9 SS
8 RT
7 FBX
DE PACKAGE
12-LEAD (4mm × 3mm) PLASTIC DFN
θJA = 43°C/W, θJC = 5.5°C/W
EXPOSED PAD (PIN 13) IS PGND AND GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION http://www.linear.com/product/LT8364#orderinfo
LEAD FREE FINISH
TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT8364EMSE#PBF
LT8364EMSE#TRPBF 8364
16-Lead Plastic MSOP with 4 Pins Removed –40°C to 125°C
LT8364IMSE#PBF
LT8364IMSE#TRPBF
8364
16-Lead Plastic MSOP with 4 Pins Removed –40°C to 125°C
LT8364HMSE#PBF
LT8364HMSE#TRPBF 8364
16-Lead Plastic MSOP with 4 Pins Removed –40°C to 150°C
LT8364EDE#PBF
LT8364IDE#PBF
LT8364EDE#TRPBF
LT8364IDE#TRPBF
8364
8364
12-Lead (4mm × 3mm) Plastic DFN
12-Lead (4mm × 3mm) Plastic DFN
–40°C to 125°C
–40°C to 125°C
LT8364HDE#PBF
LT8364HDE#TRPBF
8364
12-Lead (4mm × 3mm) Plastic DFN
–40°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.
8364f
2 For more information www.linear.com/LT8364


Part Number LT8364
Description Boost/SEPIC/Inverting Converter
Maker Analog Devices
Total Page 30 Pages
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