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Part Number: LM2717
Description: The LM2717 is composed of two PWM DC/DC buck (stepdown) converters. The first converter is used to gen...
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LM2717
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General Description
LM2717 General Description
The LM2717 is composed of two PWM DC/DC buck (stepdown) converters. The first converter is used to generate a fixed output voltage of 3.3V. The second converter is used to generate an adjustable output voltage. Both converters feature low RDSON (0.16) internal switches for maximum efficiency.
Operating frequency can be adjusted anywhere between 300kHz and 600kHz allowing the use of small external components. External soft-start pins for each enables the user to tailor the soft-start times to a specific application. Each converter may also be shut down independently with its own shutdown pin. The LM2717 is available in a low profile 24-lead TSSOP package ensuring a low profile overall solution.
LM2717 Maximum Ratings
If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
VIN ...........................................−0.3V to 22V
SW1 Voltage ............................−0.3V to 22V
SW2 Voltage ............................−0.3V to 22V
FB1 Voltage ...............................−0.3V to 7V
FB2 Voltage ...............................−0.3V to 7V
VC1 Voltage ..............1.75V VC1 2.25V
VC2 Voltage.......... 0.965V VC2 1.565V
SHDN1 Voltage ......................−0.3V to 7.5V
SHDN2 Voltage .....................−0.3V to 7.5V
SS1 Voltage ..........................−0.3V to 2.1V
SS2 Voltage ..........................−0.3V to 2.1V
FSLCT Voltage ..........................AGND to 5V
Maximum Junction Temperature .......150°C
Power Dissipation(Note 2) .....Internally Limited
Lead Temperature........................... 300°C
Vapor Phase (60 sec.) ....................215°C
Infrared (15 sec.)............................ 220°C
ESD Susceptibility (Note 3)
Human Body Model ...............................2kV
LM2717 Features
` Fixed 3.3V output buck converter with a 2.2A, 0.16,internal switch
` Adjustable buck converter with a 3.2A, 0.16, internal switch
` Operating input voltage range of 4V to 20V
` Input undervoltage protection
` 300kHz to 600kHz pin adjustable operating frequency
` Over temperature protection
` Small 24-Lead TSSOP package
` Adjustable buck converter with a 3.2A, 0.16, internal switch
` Operating input voltage range of 4V to 20V
` Input undervoltage protection
` 300kHz to 600kHz pin adjustable operating frequency
` Over temperature protection
` Small 24-Lead TSSOP package
LM2717 Typical Application
· TFT-LCD Displays
· Handheld Devices
· Portable Applications
· Laptop Computers
· Handheld Devices
· Portable Applications
· Laptop Computers
LM2717 Connection Diagram
LM2717
PDF/DataSheet Download
- Datasheet: LM2717
- File Size: 868146 KB
- Manufacturer: NATIONAL
- Click here to Download
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