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News
150VIN & VOUT Synchronous 4-Switch Buck-Boost Controller with Integrated Switching Bias Supply
2018-02-12 | ReturnLTC3777 integrates a low quiescent current high efficiency switching bias supply for its internal power consumption. The output voltage of the LTC3777 can be set from 1.2V to 150V at output currents up to tens of amps, depending on the choice of external components. Output power up to 500W can be delivered with a single device. Higher powers can be achieved when multiple circuits are configured in parallel. The LTC3777’s powerful 1.5Ω N-channel MOSFET gate drivers can be adjusted from 6V to 10V, enabling the use of logic-level or standard-threshold MOSFETs.
The LTC3777 employs a proprietary current mode control architecture for constant frequency in buck, boost or buck-boost modes. The operating frequency can be synchronized to an external clock from 50kHz to 600kHz, while an input/output constant current loop provides support for battery charging and overload protection. The user can select either forced continuous mode or discontinuous mode to maximize light load efficiency. Additional features include seamless transfers between operating
regions, a power good output voltage monitor, adjustable soft-start and input overvoltage lockout, and output voltage disconnect during shutdown.
The LTC3777 is available in a 48-lead e-LQFP package with pin skipping for high voltage spacing. Extended and industrial versions are available from –40 to 125°C.
Summary of Features: LTC3777
。4-Switch Synchronous Current Mode Buck-Boost Architecture
。Operation with Input Voltages Above, Below or Equal to the Output Voltage
。4.5V to 150V Input Voltage Range
。1.2V to 150V Output Voltage Range
。Up to 99% Efficiency
。Integrated Switching Bias Supply
。Input or Output Average Current Limit
。Adjustable 6V to 10V MOSFET Gate Drivers
。Compatible with Logic-Level or Standard-Threshold NMOS
。500 Watts Output Power Capable with a Single Device
。Fixed Synchronizable Operating Frequency from 50kHz to 600kHz
。Output Voltage Disconnect from VIN During Shutdown
。Adjustable Soft-Start
。±1% Reference Voltage Accuracy over –40oC to 125oC
。48-Lead e-LQFP Package with High Voltage Pin Skipping
Pricing & Availability
Product |
Sample Availability |
Production Availability |
Price Each Per 1,000 |
Package |
LTC3777 |
Now |
Now |
Starts at $8.40 |
e-LQFP-48 7mm x 7mm |
Source:http://www.linear.com/