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The LTC®3561 is a constant-frequency, synchronous, step-down DC/DC converter. Intended for medium power applications, it operates from a 2.63V to 5.5V input voltage range and has a user configurable operating frequency up to 4MHz, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. The output voltage is adjustable from 0.8V to 5V. Internal synchronous 0.11Ω power switches with 1.4A peak current ratings provide high efficiency. The LTC3561’s current mode architecture and external compensation allow the transient response to be optimized over a wide range of loads and output capacitors.
FEATURES
■ Uses Tiny Capacitors and Inductor
■ High Frequency Operation: Up to 4MHz
■ High Switch Current: 1.4A
■ Low RDS(ON) Internal Switches: 0.110Ω
■ High Efficiency: Up to 95%
■ VIN: 2.63V to 5.5V
■ Stable with Ceramic Capacitors
■ Current Mode Operation for Excellent Line and Load Transient Response
■ Short-Circuit Protected
■ Low Dropout Operation: 100% Duty Cycle
■ Low Shutdown Current: IQ ≤ 1µA
■ Low Quiescent Current: 240µA
■ Output Voltages from 0.8V to 5V
■ Low Noise Pulse-Skipping Operation
■ Small 8-Pin DFN Package
APPLICATIONS
■ Wireless LAN Power
■ Notebook Computers
■ Digital Cameras
■ Cellular Phones
■ Board Mounted Power Supplies
Specifications
Attribute
Attribute Value
Manufacturer
Analog Devices / Linear Technology
Product Category
IC Chips
Series
-
Packaging
Alternate Packaging
Package-Case
8-WFDFN Exposed Pad
Operating-Temperature
-40°C ~ 125°C (TJ)
Mounting-Type
Surface Mount
Output-Type
Adjustable
Function
Step-Down
Supplier-Device-Package
8-DFN (3x3)
Number-of-Outputs
1 Output
Topology
Buck
Frequency-Switching
2.5MHz
Current-Output
1A
Output-Configuration
Positive
Output Voltage
0.8V
Voltage-Output-Max
5V
Synchronous-Rectifier
Yes
Voltage-Input-Min
2.5V
Voltage-Input-Max
5.5V
Descriptions
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 1A 8-WFDFN Exposed Pad
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...