Overview
The LT8609AEDDM#PBF is a high-efficiency, synchronous monolithic step-down switching regulator produced by Analog Devices Inc. This compact regulator is designed to operate within a wide input voltage range of 3.0V to 42V and can deliver up to 3A of continuous output current. It is known for its ultralow quiescent current, high efficiency, and fast transient response, making it suitable for a variety of applications requiring reliable and efficient power management.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Units |
|---|---|---|---|---|
| Input Voltage Range | 3.0 | - | 42 | V |
| Output Current | - | - | 3 | A |
| Quiescent Current | - | 1.7 | - | µA |
| Operating Temperature Range | -40 | - | 125 | °C |
| Switching Frequency | 200kHz | - | 2.2MHz | - |
| Output Ripple | - | - | 10mV-P-P | - |
| Package Type | - | - | 10-Lead DFN (3mm x 3mm) | - |
Key Features
- High Efficiency: Achieves efficiency greater than 93% at 1A, 5V output from a 12V input.
- Ultralow Quiescent Current: Consumes only 1.7µA of non-switching quiescent current.
- Burst Mode Operation: Enables high efficiency down to very low output currents while keeping the output ripple below 10mV-P-P.
- Fast Transient Response: Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability.
- Synchronization and Spread Spectrum Modulation: A SYNC pin allows synchronization to an external clock or spread spectrum modulation for low EMI operation).
- Programmable Output Voltage Ramp Rate: A capacitor on the TR/SS pin programs the output voltage ramp rate during start-up).
- Power Good Flag: The PG flag signals when VOUT is within ±8.5% (adjustable output) or ±7.5% (fixed output) of the programmed output voltage, as well as fault conditions).
Applications
- Industrial Power Supplies: Suitable for applications requiring high efficiency and reliability in industrial settings.
- Automotive Systems: Versions with controlled manufacturing are available to support the quality and reliability requirements of automotive applications).
- Portable Electronics: Ideal for battery-powered devices due to its low quiescent current and high efficiency.
- Medical Devices: Can be used in medical equipment where high reliability and low noise are critical.
- Telecommunications: Applicable in telecom infrastructure for efficient power management.
Q & A
- What is the input voltage range of the LT8609AEDDM#PBF?
The input voltage range is from 3.0V to 42V).
- What is the maximum continuous output current of the LT8609AEDDM#PBF?
The maximum continuous output current is 3A).
- What is the quiescent current of the LT8609AEDDM#PBF?
The quiescent current is 1.7µA).
- What is the operating temperature range of the LT8609AEDDM#PBF?
The operating temperature range is from -40°C to 125°C).
- Does the LT8609AEDDM#PBF support synchronization and spread spectrum modulation?
Yes, it supports synchronization to an external clock and spread spectrum modulation for low EMI operation).
- What is the typical efficiency of the LT8609AEDDM#PBF at 1A, 5V output from a 12V input?
The typical efficiency is greater than 93%).
- Can the LT8609AEDDM#PBF be used in automotive applications?
Yes, versions with controlled manufacturing are available to support automotive applications).
- What is the package type of the LT8609AEDDM#PBF?
The package type is a 10-Lead DFN (3mm x 3mm)).
- How does the LT8609AEDDM#PBF manage output voltage ramp rate during start-up?
A capacitor on the TR/SS pin programs the output voltage ramp rate during start-up).
- What does the PG flag indicate in the LT8609AEDDM#PBF?
The PG flag signals when VOUT is within ±8.5% (adjustable output) or ±7.5% (fixed output) of the programmed output voltage, as well as fault conditions).
