Overview
The LT8609SEV#PBF, produced by Analog Devices Inc., is a compact, high-efficiency, high-speed synchronous monolithic step-down switching regulator. This component is designed to operate with a wide input voltage range of 3V to 42V and can deliver up to 2A of continuous current with peak loads of 3A for short durations (<1sec). It features a low quiescent current of 1.7µA in non-switching mode, making it suitable for power-efficient applications. The regulator is housed in a small 16-lead 3mm × 3mm LQFN package, which minimizes the need for external components and supports high-density designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 3V to 42V | V |
| Output Current (Continuous) | 2A | A |
| Peak Output Current | 3A (<1sec) | A |
| Quiescent Current (Non-switching) | 1.7µA | A |
| Feedback Voltage | 0.774V | V |
| Switching Frequency | Up to 2MHz | Hz |
| Operating Junction Temperature Range | –40 to 125°C | °C |
| Package Type | 16-lead 3mm × 3mm LQFN |
Key Features
- High Efficiency: Achieves high efficiency even at low output currents due to low ripple Burst Mode operation.
- Low EMI/EMC Emissions: Features Silent Switcher 2 architecture for ultralow EMI/EMC emissions on any PCB.
- External Clock Synchronization: The SYNC pin allows synchronization to an external clock or spread spectrum modulation of switching frequencies.
- Output Tracking and Soft-Start: The TR/SS pin allows user control of output voltage ramp rate during start-up.
- Power Good Flag: The PG pin signals when VOUT is within ±8.5% of the programmed output voltage and indicates fault conditions.
- Undervoltage Lockout: The EN/UV pin can be used to program a VIN threshold below which the LT8609S will shut down.
Applications
- General Purpose Step-Down Conversion: Suitable for a wide range of step-down conversion applications.
- Low EMI Step-Down Applications: Ideal for applications requiring minimal electromagnetic interference.
- GSM Transceivers and High Transient Load Applications: Supports high transient loads, making it suitable for GSM transceivers and similar applications.
- Automotive Applications: Versions with controlled manufacturing are available to support the quality and reliability requirements of automotive applications.
Q & A
- What is the input voltage range of the LT8609SEV#PBF?
The input voltage range is 3V to 42V.
- What is the maximum continuous output current of the LT8609SEV#PBF?
The maximum continuous output current is 2A.
- What is the quiescent current in non-switching mode?
The quiescent current in non-switching mode is 1.7µA.
- What is the feedback voltage of the LT8609SEV#PBF?
The feedback voltage is 0.774V.
- Can the LT8609SEV#PBF be synchronized to an external clock?
Yes, the SYNC pin allows synchronization to an external clock or spread spectrum modulation of switching frequencies.
- How does the TR/SS pin function?
The TR/SS pin allows user control of output voltage ramp rate during start-up and can force the regulator to track an external voltage.
- What is the purpose of the PG pin?
The PG pin signals when VOUT is within ±8.5% of the programmed output voltage and indicates fault conditions.
- Can the LT8609SEV#PBF be used in automotive applications?
Yes, versions with controlled manufacturing are available to support the quality and reliability requirements of automotive applications.
- What is the operating junction temperature range of the LT8609SEV#PBF?
The operating junction temperature range is –40 to 125°C.
- What package type is the LT8609SEV#PBF available in?
The LT8609SEV#PBF is available in a 16-lead 3mm × 3mm LQFN package.
