Overview
The LTC3618EUF#TRPBF, produced by Analog Devices Inc., is a dual synchronous step-down regulator that utilizes a current mode, constant-frequency architecture. This regulator is designed to provide a complete DDR (Double Data Rate) power supply solution, including termination and reference voltages. It is available in a thermally enhanced 24-pin QFN package, making it suitable for high-density applications.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Operating Voltage Range (VIN) | 2.25 | 5.5 | V | |
| Undervoltage Lockout Threshold (VUVLO) | 1.8 | 2.2 | V | |
| Output Voltage Accuracy | ±1% | % | ||
| Output Current Capability (per channel) | ±3A | A | ||
| Switching Frequency | Up to 4MHz | Hz | ||
| Shutdown Current | ≤1µA | A | ||
| Operating Junction Temperature Range | –40°C | 125°C | °C | |
| Storage Temperature | –65°C | 150°C | °C |
Key Features
- High efficiency up to 94%
- Dual outputs with ±3A output current capability
- Adjustable switching frequency up to 4MHz
- Internal or external compensation and soft-start options
- Selectable 0°/90°/180° phase shift between channels
- Power good status outputs
- Low profile 4mm × 4mm QFN-24 and TSSOP-24 packages
- VTT output voltage down to 0.5V
Applications
- DDR power supply, termination, and reference
- High-density power supply solutions
- Automotive applications (with #W suffix models)
- General-purpose high-efficiency DC-DC conversion
Q & A
- What is the operating voltage range of the LTC3618?
The operating voltage range of the LTC3618 is from 2.25V to 5.5V.
- What is the maximum output current capability per channel?
The maximum output current capability per channel is ±3A.
- Can the switching frequency be adjusted?
Yes, the switching frequency can be adjusted up to 4MHz.
- What are the package options for the LTC3618?
The LTC3618 is available in 24-pin QFN and TSSOP packages.
- What is the shutdown current of the LTC3618?
The shutdown current is ≤1µA.
- Does the LTC3618 support phase shifting between channels?
Yes, it supports selectable 0°/90°/180° phase shift between channels.
- What is the minimum VTT output voltage?
The VTT output voltage can go down to 0.5V.
- Are there automotive-grade versions of the LTC3618?
Yes, versions designated with a #W suffix are available for automotive applications.
- What is the operating junction temperature range?
The operating junction temperature range is from –40°C to 125°C.
- Does the LTC3618 have power good status outputs?
Yes, it has power good status outputs for both VDDQ and VTT channels.
