Overview
The LT3990IDD#TRPBF is a high-performance, adjustable frequency monolithic buck switching regulator manufactured by Analog Devices Inc. This regulator is designed to accept a wide input voltage range of 4.2V to 62V and provides a highly efficient power conversion solution. It is particularly notable for its low quiescent current of 2.5µA, making it suitable for battery-powered and energy-efficient applications. The LT3990 is available in various output voltage configurations, including fixed output voltages of 3.3V and 5V, as well as an adjustable output voltage option.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Units |
|---|---|---|---|---|
| Input Voltage | 4.2 | - | 62 | V |
| Output Current | - | - | 350 | mA |
| Quiescent Current (VEN/UVLO Low) | 0.7 | 1.9 | 2.8 | µA |
| Feedback Voltage | 1.185 | 1.21 | 1.225 | V |
| Output Voltage (LT3990-3.3) | 3.234 | 3.3 | 3.366 | V |
| Output Voltage (LT3990-5) | 4.9 | 5 | 5.1 | V |
| Switching Frequency | - | 400 | - | kHz |
| Operating Temperature Range | -40 | - | 125 | °C |
| Package Type | - | - | DFN-10-EP (3x3), MSOP-16 | - |
Key Features
- Wide input voltage range: 4.2V to 62V
- Low quiescent current: 2.5µA
- Adjustable output voltage: 1.21V to 25V
- Fixed output voltage options: 3.3V and 5V
- High efficiency buck switching regulator
- Switching frequency adjustable from 200kHz to 2.2MHz
- Burst mode operation for high efficiency under light loads
- Power good and undervoltage lockout (EN/UVLO) features
- Compact packages: DFN-10-EP (3x3) and MSOP-16
Applications
The LT3990IDD#TRPBF is suitable for a variety of applications requiring high efficiency and low power consumption, such as:
- Battery-powered devices
- Automotive systems (with appropriate temperature and reliability grades)
- Industrial control systems
- Medical devices
- Telecommunication equipment
- Portable electronics
Q & A
- What is the input voltage range of the LT3990IDD#TRPBF?
The input voltage range is from 4.2V to 62V. - What is the typical quiescent current of the LT3990IDD#TRPBF?
The typical quiescent current is 1.9µA. - What are the fixed output voltage options available for the LT3990?
The fixed output voltage options are 3.3V and 5V. - What is the switching frequency range of the LT3990IDD#TRPBF?
The switching frequency is adjustable from 200kHz to 2.2MHz. - Does the LT3990IDD#TRPBF support burst mode operation?
Yes, it supports burst mode operation for high efficiency under light loads. - What are the package types available for the LT3990IDD#TRPBF?
The package types available are DFN-10-EP (3x3) and MSOP-16. - What is the operating temperature range of the LT3990IDD#TRPBF?
The operating temperature range is from -40°C to 125°C. - Is the LT3990IDD#TRPBF suitable for automotive applications?
Yes, but only with the appropriate automotive grade and temperature range. - What is the maximum output current of the LT3990IDD#TRPBF?
The maximum output current is 350mA. - Does the LT3990IDD#TRPBF have power good and undervoltage lockout features?
Yes, it includes power good and undervoltage lockout (EN/UVLO) features.
