LT8362
Low I Boost/SEPIC/
Q
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.
FEATURES
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Wide Input Voltage Range: 2.8V to 60V
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Ultralow Quiescent Current and Low Ripple
Burst Mode® Operation: I = 9µA
2A, 60V Power Switch
Q
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Positive or Negative Output Voltage Programming
with a Single Feedback Pin
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Programmable Frequency (300kHz to 2MHz)
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Synchronizable to an External Clock
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
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Spread Spectrum Frequency Modulation for Low EMI
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BIAS Pin for Higher Efficiency
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Programmable Undervoltage Lockout (UVLO)
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Thermally Enhanced 10-Lead 3mm × 3mm DFN and
16-Lead MSOP packages
APPLICATIONS
a second input to supply the INTV regulator. Additional
CC
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Industrial and Automotive
features include frequency foldback and programmable
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Telecom
soft-start to control inductor current during start-up.
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Medical Diagnostic Equipment
Portable Electronics
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.
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All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
2MHz, 48V Output Boost Converter
Efficiency and Power Loss
ꢀꢁꢁ
ꢀꢁ
8ꢀ
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6ꢀ
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3ꢀ
2ꢀ
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2ꢀꢁ
ꢀꢁ8
ꢀꢁ6
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ꢀꢁ2
ꢀꢁꢂ
ꢀꢁ8
ꢀꢁ6
ꢀꢁꢂ
ꢀꢁ2
ꢀ
ꢀ
ꢄ8ꢀ
ꢁꢂꢃ
6.8μH
ꢀ
ꢁꢂ
2ꢅꢅꢆꢇ ꢇꢃ ꢀ ꢊ 8ꢀ
32ꢅꢆꢇ ꢇꢃ ꢀ ꢊ ꢋ2ꢀ
ꢈꢉ
ꢌꢅꢅꢆꢇ ꢇꢃ ꢀ ꢊ 2ꢄꢀ
8ꢀ ꢃꢄ 38ꢀ
ꢈꢉ
ꢀꢁꢁꢂꢃꢂꢀꢄꢃꢅ
ꢀꢁꢂꢃꢄ
ꢈꢉ
ꢀꢁ
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ꢁꢂ
ꢀꢁꢂꢃꢄ
ꢀꢁꢂ
ꢀꢁꢂꢃꢄ
ꢀꢁ8362
ꢀꢁꢂꢃꢄꢅꢆ
ꢀꢁꢂꢃ
ꢀꢁꢂꢃ
ꢄꢄ
ꢀꢁꢂꢃꢄꢅꢆꢇꢈ
ꢀꢁ ꢀꢀ
ꢀꢁꢂꢃꢄ ꢅꢁꢆꢆ
ꢀꢁꢂ ꢀ
ꢁ
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3ꢀꢁ8ꢂ
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ꢀ 2ꢁꢂ
ꢀꢁ
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2ꢀꢁ
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ꢀꢁꢂꢃ
ꢀꢁꢂꢃꢄ
ꢀ
ꢀꢁꢂ ꢀꢁ2 ꢀꢁ3 ꢀꢁꢂ ꢀꢁꢂ ꢀꢁ6 ꢀꢁꢂ ꢀꢁ8
ꢀꢁꢂꢃ ꢄꢅꢆꢆꢇꢈꢉ ꢊꢂꢋ
8362 ꢀꢁꢂꢃa
8362 ꢀꢁꢂꢃꢄ
8362fa
1
For more information www.linear.com/LT8362