Datasheet LT8362 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | Low IQ Boost/SEPIC/Inverting Converter with 2A, 60V Switch |
| Páginas / Página | 32 / 1 — FEATURES. DESCRIPTION. Wide Input Voltage Range: 2.8V to 60V. Ultralow … |
| Formato / tamaño de archivo | PDF / 2.4 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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LT8362 Low IQ Boost/SEPIC/ Inverting Converter with 2A, 60V Switch
FEATURES DESCRIPTION
n
Wide Input Voltage Range: 2.8V to 60V
The LT®8362 is a current mode DC/DC converter with a n
Ultralow Quiescent Current and Low Ripple
60V, 2A switch operating from a 2.8V to 60V input. With
Burst Mode
®
Operation: IQ = 9µA
a unique single feedback pin architecture it is capable n
2A, 60V 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 (300kHz to 2MHz)
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 volt- n BIAS Pin for Higher Efficiency ages and programmable switching frequencies between n Programmable Undervoltage Lockout (UVLO) 300kHz and 2MHz. A SYNC/MODE pin allows synchroni- n Thermally Enhanced 10-Lead 3mm × 3mm DFN and zation to an external clock. It can also be used to select 16-Lead MSOP packages between burst or pulse-skipping modes of operation with or without Spread Spectrum Frequency Modulation for
APPLICATIONS
low EMI. For increased efficiency, a BIAS pin can accept a second input to supply the INTVCC regulator. Additional n Industrial and Automotive features include frequency foldback and programmable n Telecom soft-start to control inductor current during start-up. n Medical Diagnostic Equipment n The LT8362 is available in a thermally enhanced 10-lead Portable Electronics 3mm × 3mm DFN package or a thermal y enhanced All registered trademarks and trademarks are the property of their respective owners. 16-lead MSOP package with four pins removed.
TYPICAL APPLICATION 2MHz, 48V Output Boost Converter Efficiency and Power Loss
V 2.0 OUT 100 6.8μH VIN 48V 90 1.8 8V TO 38V 200mA AT VIN = 8V 4.7µF 320mA AT VIN = 12V 80 EFFICIENCY 1.6 V 700mA AT V 1M IN = 24V IN SW 4.7pF 70 1.4 POWER LOSS (W) LT8362 FBX 4.7µF 60 1.2 EN/UVLO BIAS 50 1.0 40 0.8 SYNC/MODE INTVCC EFFICIENCY (%) POWER LOSS RT SS GND V 30 0.6 C 1µF 34.8k 20 0.4 VIN = 12V 20k 57.6k 10 VIN = 24V 0.2 10nF 150pF 0 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 LOAD CURRENT (A) 8362 TA01a 8362 TA01b 8362fa For more information www.linear.com/LT8362 1 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
FEATURES DESCRIPTION
n
Wide Input Voltage Range: 2.8V to 60V
The LT®8362 is a current mode DC/DC converter with a n
Ultralow Quiescent Current and Low Ripple
60V, 2A switch operating from a 2.8V to 60V input. With
Burst Mode
®
Operation: IQ = 9µA
a unique single feedback pin architecture it is capable n
2A, 60V 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 (300kHz to 2MHz)
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 volt- n BIAS Pin for Higher Efficiency ages and programmable switching frequencies between n Programmable Undervoltage Lockout (UVLO) 300kHz and 2MHz. A SYNC/MODE pin allows synchroni- n Thermally Enhanced 10-Lead 3mm × 3mm DFN and zation to an external clock. It can also be used to select 16-Lead MSOP packages between burst or pulse-skipping modes of operation with or without Spread Spectrum Frequency Modulation for
APPLICATIONS
low EMI. For increased efficiency, a BIAS pin can accept a second input to supply the INTVCC regulator. Additional n Industrial and Automotive features include frequency foldback and programmable n Telecom soft-start to control inductor current during start-up. n Medical Diagnostic Equipment n The LT8362 is available in a thermally enhanced 10-lead Portable Electronics 3mm × 3mm DFN package or a thermal y enhanced All registered trademarks and trademarks are the property of their respective owners. 16-lead MSOP package with four pins removed.
TYPICAL APPLICATION 2MHz, 48V Output Boost Converter Efficiency and Power Loss
V 2.0 OUT 100 6.8μH VIN 48V 90 1.8 8V TO 38V 200mA AT VIN = 8V 4.7µF 320mA AT VIN = 12V 80 EFFICIENCY 1.6 V 700mA AT V 1M IN = 24V IN SW 4.7pF 70 1.4 POWER LOSS (W) LT8362 FBX 4.7µF 60 1.2 EN/UVLO BIAS 50 1.0 40 0.8 SYNC/MODE INTVCC EFFICIENCY (%) POWER LOSS RT SS GND V 30 0.6 C 1µF 34.8k 20 0.4 VIN = 12V 20k 57.6k 10 VIN = 24V 0.2 10nF 150pF 0 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 LOAD CURRENT (A) 8362 TA01a 8362 TA01b 8362fa For more information www.linear.com/LT8362 1 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS