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The LT®8640 step-down regulator features Silent Switcher architecture designed to minimize EMI/EMC emissions while delivering high efficiency at frequencies up to3MHz. Assembled in a3mm ×4mm QFN, the monolithic construction with integrated power switches and inclusion of all
necessary circuitry yields a solution with a minimal PCB footprint. An ultralow2.5µA quiescent current—with the output in full regulation—enables applications requiring highest efficiency at very small load currents. Transient response remains excellent and output voltage ripple is below10mVP-P at any load, from zero to full current.
FEATURES
Silent Switcher® Architecture
Ultralow EMI/EMC Emissions
Spread Spectrum Frequency Modulation
High Efficiency at High Frequency
Up to 96% Efficiency at 1MHz
Up to 95% Efficiency at 2MHz
Wide Input Voltage Range: 3.4V to 42V
5A Maximum Continuous Output, 7A Peak Transient Output
Ultralow Quiescent Current Burst Mode® Operation
2.5μA IQRegulating 12VINto 3.3VOUT
Output Ripple < 10mVP-P
Fast Minimum Switch-On Time: 40ns
Low Dropout Under All Conditions: 100mV at 1A
Safely Tolerates Inductor Saturation in Overload
Adjustable and Synchronizable: 200kHz to 3MHz
Peak Current Mode Operation
Output Soft-Start and Tracking
Small 18-Lead 3mm ×4mm QFN
APPLICATIONS
Automotive and Industrial Supplies
General Purpose Step-Down
GSM Power Supplies
Specifications
Attribute
Attribute Value
Manufacturer
Analog Devices / Linear Technology
Product Category
DC Switching Regulators
Series
-
Packaging
Tape & Reel (TR) Alternate Packaging
Package-Case
18-WFQFN Exposed Pad
Operating-Temperature
-40°C ~ 125°C (TJ)
Mounting-Type
Surface Mount
Output-Type
Adjustable
Function
Step-Down
Supplier-Device-Package
18-QFN (3x4)
Number-of-Outputs
1 Output
Topology
Buck
Frequency-Switching
210kHz ~ 2MHz
Current-Output
5A
Output-Configuration
Positive
Output Voltage
0.97V
Voltage-Output-Max
42V
Synchronous-Rectifier
Yes
Voltage-Input-Min
3.4V
Voltage-Input-Max
42V
Descriptions
Buck Switching Regulator IC Positive Adjustable 0.97V 1 Output 5A 20-WFQFN, 18 Leads, Exposed Pad
LT8640/LT8640-1 - 42V, 5A Synchronous Step-Down Silent Switcher with 2.5?A Quiescent Current
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Distributor/Wholesaler,Trading Company
Year Established:
2005
Total Annual:
1000000-3000000
Employee Number:
100~150
Ecer Certification:
Verified Supplier
Our company, founded in 2005, has built long-term partnerships with numerous high-quality suppliers worldwide.
We specialize in providing customers with new and original products. To ensure quality, our technicians rigorously test all products before shipment, offering customers the strongest ass... Our company, founded in 2005, has built long-term partnerships with numerous high-quality suppliers worldwide.
We specialize in providing customers with new and original products. To ensure quality, our technicians rigorously test all products before shipment, offering customers the strongest ass...