Datasheet LT8365 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | Low IQ Boost/SEPIC/Inverting Converter with 1.5A, 150V Switch |
| Páginas / Página | 28 / 1 — FEATURES. DESCRIPTION. Wide Input Voltage Range: 2.8V to 60V. Ultralow … |
| Formato / tamaño de archivo | PDF / 2.3 Mb |
| Idioma del documento | Inglés |
FEATURES. DESCRIPTION. Wide Input Voltage Range: 2.8V to 60V. Ultralow Quiescent Current and Low Ripple. Burst Mode
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LT8365 Low IQ Boost/SEPIC/Inverting Converter with 1.5A, 150V Switch
FEATURES DESCRIPTION
n
Wide Input Voltage Range: 2.8V to 60V
The LT®8365 is a current mode DC/DC converter with a n
Ultralow Quiescent Current and Low Ripple
1.5A, 150V switch operating from a 2.8V to 60V input.
Burst Mode
®
Operation: IQ = 9µA
With a unique single feedback pin architecture it is capable n
1.5A, 150V Power Switch
of boost, SEPIC or inverting configurations. Burst Mode n
Positive or Negative Output Voltage Programming
operation consumes as low as 9µA quiescent current to
with a Single Feedback Pin
maintain high efficiency at very low output currents, while n
Programmable Frequency (100kHz to 500kHz)
keeping typical output ripple below 15mV. n Synchronizable to an External Clock An external compensation pin allows optimization of loop n Spread Spectrum Frequency Modulation for Low EMI bandwidth over a wide range of input and output voltages n BIAS Pin for Higher Efficiency and programmable switching frequencies between 100kHz n Programmable Undervoltage Lockout (UVLO) and 500kHz. A SYNC/MODE pin allows synchronization n Thermally Enhanced 16-lead MSOP Package to an external clock. It can also be used to select between n AEC-Q100 Qualification in Progress burst or pulse-skipping modes of operation with or with- out spread spectrum frequency modulation for low EMI.
APPLICATIONS
For increased efficiency, a BIAS pin can accept a second input to supply the INTVCC regulator. Additional features n Industrial and Automotive include frequency foldback and programmable soft-start n Telecom to control inductor current during startup. n Medical Diagnostic Equipment n Portable Electronics The LT8365 is available in a thermally enhanced 16-lead MSOP package with four pins removed for high voltage All registered trademarks and trademarks are the property of their respective owners. pin spacings.
TYPICAL APPLICATION 400kHz, –250V Output Inverting Converter Switching Waveforms
0.1µF 20Ω VOUT –250V 10mA IL 0.1µF 0.22µF 10µH 20Ω 500mA/DIV VIN 9V TO 30V 10µF 0.22µF VIN SW VSW EN/UVLO 1MΩ 50V/DIV FBX LT8365 VOUT BIAS SYNC/MODE 8365 TA01b INTVCC 1µs/DIV RT SS GND VC 3.24k 84.5k 1µF 107k 0.22µF 1nF D1, D2, D3, D4: DIODES INC. DFLS1150 8365 TA01a L1: WURTH ELEKTRONIK 74437324100 Rev. 0 Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
FEATURES DESCRIPTION
n
Wide Input Voltage Range: 2.8V to 60V
The LT®8365 is a current mode DC/DC converter with a n
Ultralow Quiescent Current and Low Ripple
1.5A, 150V switch operating from a 2.8V to 60V input.
Burst Mode
®
Operation: IQ = 9µA
With a unique single feedback pin architecture it is capable n
1.5A, 150V Power Switch
of boost, SEPIC or inverting configurations. Burst Mode n
Positive or Negative Output Voltage Programming
operation consumes as low as 9µA quiescent current to
with a Single Feedback Pin
maintain high efficiency at very low output currents, while n
Programmable Frequency (100kHz to 500kHz)
keeping typical output ripple below 15mV. n Synchronizable to an External Clock An external compensation pin allows optimization of loop n Spread Spectrum Frequency Modulation for Low EMI bandwidth over a wide range of input and output voltages n BIAS Pin for Higher Efficiency and programmable switching frequencies between 100kHz n Programmable Undervoltage Lockout (UVLO) and 500kHz. A SYNC/MODE pin allows synchronization n Thermally Enhanced 16-lead MSOP Package to an external clock. It can also be used to select between n AEC-Q100 Qualification in Progress burst or pulse-skipping modes of operation with or with- out spread spectrum frequency modulation for low EMI.
APPLICATIONS
For increased efficiency, a BIAS pin can accept a second input to supply the INTVCC regulator. Additional features n Industrial and Automotive include frequency foldback and programmable soft-start n Telecom to control inductor current during startup. n Medical Diagnostic Equipment n Portable Electronics The LT8365 is available in a thermally enhanced 16-lead MSOP package with four pins removed for high voltage All registered trademarks and trademarks are the property of their respective owners. pin spacings.
TYPICAL APPLICATION 400kHz, –250V Output Inverting Converter Switching Waveforms
0.1µF 20Ω VOUT –250V 10mA IL 0.1µF 0.22µF 10µH 20Ω 500mA/DIV VIN 9V TO 30V 10µF 0.22µF VIN SW VSW EN/UVLO 1MΩ 50V/DIV FBX LT8365 VOUT BIAS SYNC/MODE 8365 TA01b INTVCC 1µs/DIV RT SS GND VC 3.24k 84.5k 1µF 107k 0.22µF 1nF D1, D2, D3, D4: DIODES INC. DFLS1150 8365 TA01a L1: WURTH ELEKTRONIK 74437324100 Rev. 0 Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts