Overview
The LT8648SEV#PBF is a high-performance synchronous step-down regulator from Analog Devices Inc., designed with the second-generation Silent Switcher architecture. This regulator is optimized to minimize EMI emissions while maintaining high efficiency and fast transient response. It is particularly suited for applications requiring low noise and high reliability, such as in automotive, industrial, and consumer electronics.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Voltage | fSW = 400kHz, fSW = 2MHz | 2.45 | 2.75 | 3.0 | V |
| Quiescent Current in Shutdown | VEN/UV = 0V, VIN = 12V | 6 | 9 | µA | |
| Operating Junction Temperature Range | –40°C | 125°C | °C | ||
| Switching Frequency | 200kHz | 2.2MHz | |||
| Output Voltage | 0.97V | 41.58V | V | ||
| Maximum Output Current | 15A | A | |||
| Package Type | LQFN (Laminate Package with QFN Footprint) |
Key Features
- Silent Switcher 2 Architecture: Minimizes EMI emissions and reduces PCB layout sensitivity.
- High Efficiency: Maintains high efficiency across a wide range of input and output voltages.
- Fast Transient Response: External compensation via the VC pin allows for fast transient response at high switching frequencies.
- Current Sharing and Synchronization: The VC pin enables current sharing, and the CLKOUT pin allows synchronizing other regulators to the LT8648S.
- Low Standby Current: Burst Mode operation reduces standby current consumption.
- Spread Spectrum Modulation: Optional spread spectrum modulation further reduces EMI emissions.
- Soft-Start and Tracking: Accessed via the SS pin, providing smooth startup and tracking functionality.
- Accurate Input Voltage UVLO Threshold: Set using the EN/UV pin.
Applications
- Automotive Systems: Suitable for automotive applications due to its robust temperature range and reliability features.
- Industrial Electronics: Ideal for industrial power supplies requiring high efficiency and low noise.
- Consumer Electronics: Used in various consumer electronics where low EMI and high performance are critical.
- Telecommunications: Applicable in telecommunications equipment for efficient and reliable power conversion.
Q & A
- What is the input voltage range of the LT8648SEV#PBF?
The input voltage range is from 3.4V to 42V.
- What is the maximum output current of the LT8648SEV#PBF?
The maximum output current is 15A.
- What is the switching frequency range of the LT8648SEV#PBF?
The switching frequency range is from 200kHz to 2.2MHz.
- What is the operating temperature range of the LT8648SEV#PBF?
The operating temperature range is from –40°C to 125°C).
- Does the LT8648SEV#PBF support spread spectrum modulation?
Yes, it supports optional spread spectrum modulation to further reduce EMI emissions).
- What package type is the LT8648SEV#PBF available in?
The LT8648SEV#PBF is available in an LQFN (Laminate Package with QFN Footprint)).
- Is the LT8648SEV#PBF RoHS and WEEE compliant?
Yes, the LT8648SEV#PBF is RoHS and WEEE compliant).
- What are the key features of the Silent Switcher 2 architecture?
The Silent Switcher 2 architecture minimizes EMI emissions, reduces PCB layout sensitivity, and includes internal bypass capacitors to reduce radiated EMI).
- How does the LT8648SEV#PBF manage low standby current consumption?
The LT8648SEV#PBF uses Burst Mode operation to reduce standby current consumption).
- Can the LT8648SEV#PBF be synchronized with other regulators?
Yes, the CLKOUT pin allows synchronizing other regulators to the LT8648SEV#PBF).
