Summary of 60V, Synchronous Buck-Boost Controller
The LT3790 is a synchronous 4-switch buck-boost controller capable of regulating voltage, current, or input current with VIN above, below, or equal to VOUT. It offers up to 98.5% efficiency, a wide 4.7V to 60V input range, and supports parallel operation for high power. Ideal for automotive and industrial battery charging, it features adjustable frequency from 200kHz to 700kHz, current monitor outputs, and status flags for charge termination and shorts.
Parts used in the LT3790 Project:
- Synchronous 4-Switch Buck-Boost Voltage/Current Regulator Controller
- Top FET Refresh Switching Cycle
- Input Current Monitor
- Output Current Monitor
- C/10 Charge Termination Flag
- Output Shorted Flag
- 38-Lead TSSOP Package with Exposed Pad
- Adjustable Frequency Circuit (200kHz to 700kHz)
Features
- 4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT
- Synchronous Switching: Up to 98.5% Efficiency
- Wide VIN Range: 4.7V to 60V
- 2% Output Voltage Accuracy: 1.2V ≤ VOUT < 60V
- 6% Output Current Accuracy: 0V ≤ VOUT < 60V
- Input and Output Current Regulation with Current Monitor Outputs
- No Top FET Refresh in Buck or Boost
- VOUT Disconnected from VIN During Shutdown
- C/10 Charge Termination and Output Shorted Flags
- Capable of 100W or greater per IC
- Easy Parallel Capability to Extend Output Power
- 38-Lead TSSOP with Exposed Pad
Description
The LT®3790 is a synchronous 4-switch buck-boost voltage/ current regulator controller. The LT3790 can regulate output voltage, output current, or input current with input voltages above, below, or equal to the output voltage. The constant-frequency, current mode architecture allows its frequency to be adjusted or synchronized from 200kHz to 700kHz. No top FET refresh switching cycle is needed in buck or boost operation. With 60V input, 60V output capability and seamless transitions between operating regions, the LT3790 is ideal for voltage regulator, battery/ super-capacitor charger applications in automotive, industrial, telecom, and even battery-powered systems.
The LT3790 provides input current monitor, output current monitor, and various status flags, such as C/10 charge termination and shorted output flag.
Applications
- Automotive, Telecom, Industrial Systems
- High Power Battery-Powered System
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For more detail: 60V, Synchronous Buck-Boost Controller
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What architecture does the LT3790 use?
The device uses a synchronous 4-switch buck-boost voltage and current regulator controller architecture. -
Can the input voltage be above, below, or equal to the output voltage?
Yes, the LT3790 allows VIN to be above, below, or equal to VOUT while maintaining regulation. -
What is the maximum efficiency of this controller?
The controller achieves up to 98.5% efficiency through synchronous switching. -
How can the operating frequency be adjusted?
The constant-frequency, current mode architecture allows frequency adjustment or synchronization from 200kHz to 700kHz. -
Does the device require top FET refresh switching cycles?
No, no top FET refresh switching cycle is needed in buck or boost operation. -
What status flags are provided by the LT3790?
It provides C/10 charge termination and output shorted flags along with input and output current monitors.
