Overview
The LTM4644EY-1#PBF is a quad DC/DC step-down µModule (micromodule) regulator produced by Analog Devices Inc. This device is part of the LTM4644 series and is designed to provide high-efficiency power conversion with multiple output channels. Each channel can deliver up to 4A of continuous output current, with the capability to parallel outputs for up to 16A. The regulator operates over an input voltage range of 4V to 14V, or 2.375V to 14V with an external bias supply, and supports an output voltage range of 0.6V to 5.5V. The LTM4644EY-1#PBF is integrated with switching controllers, power FETs, inductors, and support components, making it a comprehensive solution for various power supply applications.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input DC Voltage (VIN) | 4 | - | 14 | V |
| Input DC Voltage with External Bias (SVIN) | 2.375 | - | 14 | V |
| Output Voltage Range (VOUT) | 0.6 | - | 5.5 | V |
| Output Current per Channel | - | 4A (continuous), 5A (peak) | - | A |
| Switching Frequency | - | 1 MHz | - | Hz |
| Operating Temperature Range | -40 | - | 125 | °C |
| Package Type | - | BGA | - | - |
| No. of Pins | - | 77 | - | - |
| Package Dimensions | - | 9mm x 15mm x 5.01mm | - | - |
Key Features
- Quad output step-down µModule regulator with 4A per output channel.
- Outputs can be paralleled for up to 16A capability.
- High efficiency design with current mode control and fast transient response.
- Output voltage tracking and external frequency synchronization.
- Overvoltage, current, and temperature protection.
- Internal temperature sensing diode output.
- Only bulk input and output capacitors are required.
- Supports PMBus power system management supervisory ICs.
Applications
- Multi-rail point of load regulation.
- FPGAs (Field-Programmable Gate Arrays).
- DSPs (Digital Signal Processors).
- ASICs (Application-Specific Integrated Circuits).
- General power supply applications requiring high current and efficiency.
Q & A
- What is the input voltage range of the LTM4644EY-1#PBF?
The input voltage range is 4V to 14V, or 2.375V to 14V with an external bias supply.
- How much output current can each channel deliver?
Each channel can deliver up to 4A of continuous output current, with a peak of 5A.
- Can the outputs be paralleled for higher current?
- What is the operating temperature range of the LTM4644EY-1#PBF?
The operating temperature range is -40°C to 125°C.
- What type of package does the LTM4644EY-1#PBF use?
The device is packaged in a 77-lead BGA (Ball Grid Array).
- Does the LTM4644EY-1#PBF have built-in protection features?
- Can the LTM4644EY-1#PBF be used with PMBus power system management?
- What is the switching frequency of the LTM4644EY-1#PBF?
The switching frequency is 1 MHz.
- What are the dimensions of the LTM4644EY-1#PBF package?
The package dimensions are 9mm x 15mm x 5.01mm.
- Does the LTM4644EY-1#PBF require external components for operation?
