Overview
The LT8708EUHG#PBF, produced by Analog Devices Inc., is a high-performance buck-boost switching regulator controller. This device is designed to operate from an input voltage that can be above, below, or equal to the output voltage, making it highly versatile for various power management applications. It features advanced capabilities for bidirectional power conversion, which is particularly useful in battery/capacitor backup systems and other applications requiring regulation of output voltage, input voltage, output current, and input current.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Voltage Range | 2.8 | - | 80 | V |
| Output Voltage Range | 1.3 | - | 80 | V |
| INTVCC Undervoltage Lockout | 4.45 | 4.65 | 4.85 | V |
| INTVCC Regulator Dropout Voltage | - | - | 220 | mV |
| LDO33 Pin Voltage | 3.23 | 3.295 | 3.35 | V |
| LDO33 Pin Current Limit | 12 | 17.25 | 22 | mA |
| Operating Temperature Range | -40 | - | 125 | °C |
| Package Type | - | - | 40-Lead (5mm × 8mm) Plastic QFN | - |
Key Features
- Operates in discontinuous conduction mode (DCM), continuous conduction mode (CCM), hybrid conduction mode (HCM), and Burst Mode® operation.
- Independent current limits for forward and reverse input and output currents using four resistors on the PCB.
- Bidirectional power conversion capability with the DIR pin configuring the device to process power only from VIN to VOUT or only from VOUT to VIN.
- Integrated LDO regulator (LDO33) with a voltage range of 3.23V to 3.35V and a current limit of 12mA to 22mA.
- Wide input and output voltage ranges, making it compatible with solar, automotive, telecom, and battery-powered systems.
Applications
- Battery/capacitor backup systems.
- Solar power systems.
- Automotive systems.
- Telecom power supplies.
- Battery-powered devices requiring bidirectional power conversion.
Q & A
- What is the input voltage range of the LT8708EUHG#PBF?
The input voltage range is from 2.8V to 80V. - What are the different operation modes of the LT8708EUHG#PBF?
The device operates in discontinuous conduction mode (DCM), continuous conduction mode (CCM), hybrid conduction mode (HCM), and Burst Mode® operation. - How can the current limits be set for the LT8708EUHG#PBF?
The current limits can be set independently using four resistors on the PCB for forward and reverse input and output currents. - What is the purpose of the DIR pin in the LT8708EUHG#PBF?
The DIR pin configures the device to process power only from VIN to VOUT or only from VOUT to VIN. - What is the temperature range for the LT8708EUHG#PBF?
The operating temperature range is from -40°C to 125°C. - What type of package does the LT8708EUHG#PBF come in?
The device comes in a 40-Lead (5mm × 8mm) Plastic QFN package. - Is the LT8708EUHG#PBF suitable for automotive applications?
Yes, versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications, designated with a #W suffix. - What is the LDO33 pin used for in the LT8708EUHG#PBF?
The LDO33 pin is an integrated LDO regulator with a voltage range of 3.23V to 3.35V and a current limit of 12mA to 22mA. - Can the LT8708EUHG#PBF be used in solar power systems?
Yes, it is compatible with solar power systems due to its wide input and output voltage ranges. - How does the LT8708EUHG#PBF handle undervoltage lockout?
The device has an INTVCC undervoltage lockout with a threshold of 4.45V to 4.85V and hysteresis of 170mV.
