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Part Number: LT3462A
Description: The LT®3462/LT3462A are general purpose fixed frequency current mode inverting DC/DC co...
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LT3462A
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General Description
LT3462A General Description
The LT®3462/LT3462A are general purpose fixed frequency current mode inverting DC/DC converters. Both devices feature an integrated Schottky and a low V CESAT switch allowing a small converter footprint and lower parts cost. The LT3462 switches at 1.2MHz while the LT3462A switches at 2.7MHz. These high speeds enable the use of tiny, low cost and low height capacitors and inductors.
The LT3462/LT3462A operate in a dual inductor inverting topology that filters both the input and output currents. Very low output voltage ripple approaching 1mV P-P can be achieved when ceramic capacitors are used. Fixed frequency switching ensures a clean output free from low frequency noise typically present with charge pump solutions. The 40V switch allows a VIN to VOUT differential of up to 38V for dual inductor topologies.
Both devices provide a low impedance 1.265V reference output to supply the feedback resistor network. A ground referenced, high impedance FB input allows high feedback resistor values without compromising output accuracy.
The LT3462/LT3462A are available in a 6-lead SOT-23 package.
LT3462A Maximum Ratings
Input Voltage (VIN) .................................................. 16V
SW Voltage .............................................................. 40V
D Voltage .............................................................. 40V
SDREF, FB Voltage ................................................. 2.5V
Operating Ambient
Temperature Range (Note 3) ...............40°C to 85°C
Maximum Junction Temperature ......................... 125°C
Storage Temperature Range .................65°C to 150°C
Lead Temperature (Soldering, 10sec).................. 300°C
SW Voltage .............................................................. 40V
D Voltage .............................................................. 40V
SDREF, FB Voltage ................................................. 2.5V
Operating Ambient
Temperature Range (Note 3) ...............40°C to 85°C
Maximum Junction Temperature ......................... 125°C
Storage Temperature Range .................65°C to 150°C
Lead Temperature (Soldering, 10sec).................. 300°C
LT3462A Features
`Integrated Schottky Rectifier
`Fixed Frequency 1.2MHz/2.7MHz Operation
`Very Low Noise: 1mV P-P Output Ripple
`Low VCESAT Switch: 270mV at 250mA
`5V at 100mA from 5V Input
`12V at 30mA from 3.3V Input
`Low Input Bias Current GND Based FB Input
`Low Impedance (40 ) 1.265V Reference Output
`High Output Voltage: Up to 38V
`Wide Input Range: 2.5V to 16V
`Uses Tiny Surface Mount Components
`Low Shutdown Current: <10A
`Low Profile (1mm) SOT-23 (ThinSOTTM) Package
`Fixed Frequency 1.2MHz/2.7MHz Operation
`Very Low Noise: 1mV P-P Output Ripple
`Low VCESAT Switch: 270mV at 250mA
`5V at 100mA from 5V Input
`12V at 30mA from 3.3V Input
`Low Input Bias Current GND Based FB Input
`Low Impedance (40 ) 1.265V Reference Output
`High Output Voltage: Up to 38V
`Wide Input Range: 2.5V to 16V
`Uses Tiny Surface Mount Components
`Low Shutdown Current: <10A
`Low Profile (1mm) SOT-23 (ThinSOTTM) Package
LT3462A Typical Application
· CCD Bias
· LCD Bias
· GaAs FET Bias
· General Purpose Negative Voltage Supply
· LCD Bias
· GaAs FET Bias
· General Purpose Negative Voltage Supply
LT3462A Connection Diagram
LT3462A
PDF/DataSheet Download
- Datasheet: LT3462A
- File Size: 225280 KB
- Manufacturer: Linear
- Click here to Download
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