Overview
The LT8653SIV#PBF, produced by Analog Devices Inc., is a dual step-down regulator that integrates the second generation Silent Switcher architecture. This regulator is designed to deliver high efficiency and minimize EMI emissions, making it suitable for a variety of applications requiring low noise and high reliability. It supports up to 2A of continuous current from each channel and can handle loads up to 3A from either channel. The device operates over a wide temperature range of –40°C to 125°C, ensuring robust performance in diverse environmental conditions.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| VIN Current In Regulation | VIN = 12V, VOUT = 3.3V, Output Load = 100µA | 45 | 350 | 500 | µA |
| Feedback Reference Voltage | 0.794 | 0.8 | 0.806 | V | |
| Output Voltage Range | 0.8V, 1.8V, 3.3V, 5.0V | V | |||
| Switching Frequency | 2MHz | Hz | |||
| Quiescent Current (Burst Mode) | 6.2µA | µA | |||
| Operating Temperature Range | –40°C | 125°C | °C | ||
| Package Type | LQFN (Laminate Package with QFN Footprint) |
Key Features
- Silent Switcher 2 Architecture: Minimizes EMI emissions and optimizes high-frequency current loops, reducing layout sensitivity and radiated EMI.
- High Efficiency: Achieves high efficiency even at high switching frequencies, contributing to a compact solution size.
- Ultralow Quiescent Current: Features a quiescent current of 6.2µA in burst mode operation, reducing standby power consumption.
- Flexible Operation Modes: Supports burst mode operation for ultralow standby current and forced continuous mode to control frequency harmonics.
- Internal Compensation and Feedback Options: Allows for internal 2MHz switching frequency, internal compensation, and internal feedback resistor divider options, simplifying the design with only five external components.
- Output Ripple and Transient Response: Offers output ripple of less than 10mV peak-to-peak and an optional external VC pin for fast transient response.
- Automotive Grade: Versions designated with a #W suffix are available for automotive applications, ensuring compliance with automotive reliability requirements.
Applications
- Automotive Systems: Suitable for use in automotive applications due to its robust temperature range and automotive-grade versions.
- Industrial Power Supplies: Ideal for high-efficiency power supplies in industrial settings where low EMI and high reliability are crucial.
- Communication Equipment: Used in communication devices requiring low noise and high efficiency power regulation.
- Medical Devices: Applicable in medical equipment where precise voltage regulation and low EMI are essential.
- Consumer Electronics: Suitable for a variety of consumer electronic devices needing efficient and low-noise power management.
Q & A
- What is the maximum continuous current output of the LT8653SIV#PBF?
The LT8653SIV#PBF can deliver up to 2A of continuous current from each channel.
- What is the operating temperature range of the LT8653SIV#PBF?
The device operates over a temperature range of –40°C to 125°C.
- What is the typical quiescent current in burst mode operation?
The quiescent current in burst mode operation is typically 6.2µA.
- Does the LT8653SIV#PBF support automotive applications?
Yes, versions designated with a #W suffix are available for automotive applications and meet the necessary reliability requirements.
- What is the switching frequency of the LT8653SIV#PBF?
The switching frequency is typically 2MHz.
- How does the Silent Switcher 2 architecture benefit the LT8653SIV#PBF?
The Silent Switcher 2 architecture minimizes EMI emissions and reduces layout sensitivity, making it easier to achieve advertised EMI performance.
- What are the output voltage options for the LT8653SIV#PBF?
The output voltage can be set to 0.8V, 1.8V, 3.3V, or 5.0V depending on the state of the D0 and D1 pins.
- Can the LT8653SIV#PBF operate in forced continuous mode?
Yes, the device supports forced continuous mode to control frequency harmonics across the entire output load range.
- What is the package type of the LT8653SIV#PBF?
The package type is LQFN (Laminate Package with QFN Footprint).
- How does the soft-start feature work on the LT8653SIV#PBF?
The soft-start feature allows user control of the output voltage ramp rate during startup through the SS1 and SS2 pins.
