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Analog Devices Semiconductor Electronic Components Datasheet

LT8362 Datasheet

Boost/SEPIC/Inverting Converter

No Preview Available !

FEATURES
nn Wide Input Voltage Range: 2.8V to 60V
nn Ultralow Quiescent Current and Low Ripple
Burst Mode® Operation: IQ = 9µA
nn 2A, 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 10-Lead 3mm × 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.
LT8362
Low IQ Boost/SEPIC/
Inverting Converter
with 2A, 60V Switch
DESCRIPTION
The LT®8362 is a current mode DC/DC converter with a
60V, 2A 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-skipping 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 start-up.
The LT8362 is available in a thermally enhanced 10-lead
3mm × 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
6.8μH
4.7µF
VIN SW
LT8362
EN/UVLO
FBX
BIAS
SYNC/MODE
RT SS
INTVCC
GND VC
VOUT
48V
200mA AT VIN = 8V
320mA AT VIN = 12V
1M
4.7pF
700mA AT VIN = 24V
4.7µF
1µF 34.8k
20k
10nF
57.6k
150pF
8362 TA01a
Efficiency and Power Loss
100
90
80
70
60
50
40
30
20
10
0
0
2.0
1.8
EFFICIENCY
1.6
1.4
1.2
1.0
POWER LOSS
0.8
0.6
VIN = 12V
VIN = 24V
0.4
0.2
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
LOAD CURRENT (A)
8362 TA01b
For more information www.linear.com/LT8362
8362fa
1


Analog Devices Semiconductor Electronic Components Datasheet

LT8362 Datasheet

Boost/SEPIC/Inverting Converter

No Preview Available !

LT8362
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)
LT8362E, LT8362I................................–40°C to 125°C
LT8362H..............................................–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
EN/UVLO
VIN
INTVCC
BIAS
VC
1
2
3
4
5
11
PGND,
GND
10 SW
9 SYNC/MODE
8 SS
7 RT
6 FBX
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
θJA = 43°C/W
EXPOSED PAD (PIN 11) IS PGND AND GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION http://www.linear.com/product/LT8362#orderinfo
LEAD FREE FINISH
TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT8362EMSE#PBF
LT8362EMSE#TRPBF 8362
16-Lead Plastic MSOP with 4 Pins Removed –40°C to 125°C
LT8362IMSE#PBF
LT8362IMSE#TRPBF
8362
16-Lead Plastic MSOP with 4 Pins Removed –40°C to 125°C
LT8362HMSE#PBF
LT8362HMSE#TRPBF 8362
16-Lead Plastic MSOP with 4 Pins Removed –40°C to 150°C
LT8362EDD#PBF
LT8362EDD#TRPBF
LGWZ
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LT8362IDD#PBF
LT8362IDD#TRPBF
LGWZ
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LT8362HDD#PBF
LT8362HDD#TRPBF
LGWZ
10-Lead (3mm × 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.
Consult LTC Marketing for information on nonstandard lead based finish parts.
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/
8362fa
2 For more information www.linear.com/LT8362


Part Number LT8362
Description Boost/SEPIC/Inverting Converter
Maker Analog Devices
Total Page 30 Pages
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