Overview
The LTC3789IUFD#TRPBF, produced by Analog Devices Inc., is a high-performance, synchronous 4-switch buck-boost switching regulator controller. This device is designed to operate from input voltages that can be above, below, or equal to the output voltage, making it highly versatile for various power management applications.
The LTC3789 employs a proprietary topology and control architecture, utilizing a current-sensing resistor and an error amplifier to control the inductor current. This controller provides efficient voltage regulation and is suitable for systems requiring high reliability and performance over a wide range of operating temperatures.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| VIN (Input Supply Voltage) | 4 | - | 38 | V |
| VOUT (Output Voltage) | 0.8 | - | 38 | V |
| VFB (Regulated Feedback Voltage) | 0.788 | 0.800 | 0.812 | V |
| IFB (Feedback Current) | -15 | -50 | - | nA |
| VLOADREG (Output Voltage Load Regulation) | -0.01 | - | 0.01 | % |
| IPGOOD (PGOOD Leakage Current) | - | - | ±1 | µA |
| VPG (PGOOD Trip Level) | -10 | - | 10 | % |
Key Features
- High Efficiency: The LTC3789 offers high efficiency across buck, boost, and buck-boost modes.
- Wide Input Range: Operates from input voltages between 4V and 38V.
- Flexible Output Voltage: Can produce output voltages from 0.8V to 38V.
- Current Mode Control: Employs current mode control with a current-sensing resistor.
- Internal LDO Regulators: Includes internal 5.5V low dropout (LDO) regulators for INTVCC and EXTVCC power.
- Temperature Range: Guaranteed performance over the –40°C to 125°C operating junction temperature range.
Applications
- Power Management Systems: Suitable for various power management applications requiring high efficiency and reliability.
- Industrial Power Supplies: Ideal for industrial power supplies that need to handle a wide range of input voltages.
- Automotive Systems: Can be used in automotive systems where input voltage can vary significantly.
- Telecommunications Equipment: Applicable in telecommunications equipment that require stable and efficient power supply.
Q & A
- What is the input voltage range of the LTC3789?
The input voltage range of the LTC3789 is from 4V to 38V.
- What is the output voltage range of the LTC3789?
The output voltage range of the LTC3789 is from 0.8V to 38V.
- What type of control mode does the LTC3789 use?
The LTC3789 uses current mode control.
- What is the operating junction temperature range of the LTC3789?
The operating junction temperature range of the LTC3789 is from –40°C to 125°C.
- Does the LTC3789 have internal LDO regulators?
- What is the feedback current range of the LTC3789?
The feedback current range of the LTC3789 is from –15 nA to –50 nA.
- How does the LTC3789 handle PGOOD leakage current?
The PGOOD leakage current of the LTC3789 is ±1 µA.
- What is the PGOOD trip level of the LTC3789?
The PGOOD trip level of the LTC3789 is between –10% and 10% with respect to the set output voltage.
- Can the LTC3789 be used in automotive systems?
- Is the LTC3789 suitable for industrial power supplies?
