Overview
The LTM4644MPY, produced by Analog Devices Inc., is a quad DC/DC step-down µModule (micromodule) regulator. This device is designed to provide a high-efficiency power solution with each output capable of delivering up to 4A of continuous current and 5A of peak current. The outputs can be paralleled to achieve a combined output current of up to 16A. The LTM4644MPY 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 module includes switching controllers, power FETs, inductors, and support components, making it a comprehensive power management solution.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| VIN (Input DC Voltage) | SVIN = VIN | 4 | - | 14 | V |
| VOUT (Output Voltage Range) | - | 0.6 | - | 5.5 | V |
| IOUT (Output Current per Channel) | - | 4A (continuous), 5A (peak) | - | - | A |
| Power Dissipation | TA = 60°C, 200 LFM, no heat sink | - | - | 5.5W | W |
| Output Voltage Regulation | - | - | ±1.5% | - | % |
| Switching Frequency | - | - | 1MHz | - | Hz |
| Package Dimensions | - | 9mm x 15mm x 5.01mm | - | - | mm |
| Operating Temperature Range | - | -55°C | - | 125°C | °C |
Key Features
- High efficiency design with current mode control and fast transient response.
- Parallelable outputs for higher output current, up to 16A.
- Output voltage tracking and internal temperature sensing diode output.
- External frequency synchronization capability.
- Overvoltage, current, and temperature protection.
- Integrated feedback resistors (e.g., 60.4k 0.5% top feedback resistor).
- SAC305 pad/ball finish and MSL 3 rating.
- No need for additional external components except bulk input and output capacitors.
Applications
- Multirail point of load regulation.
- Powering FPGAs, DSPs, and ASICs.
- General power management in various electronic systems.
Q & A
- What is the input voltage range of the LTM4644MPY?
The input voltage range is 4V to 14V, or 2.375V to 14V with an external bias supply.
- What is the output voltage range of the LTM4644MPY?
The output voltage range is 0.6V to 5.5V.
- How much current can each output channel deliver?
Each output channel can deliver up to 4A continuous and 5A peak current.
- Can the outputs be paralleled for higher current?
- What is the switching frequency of the LTM4644MPY?
The switching frequency is 1MHz.
- What are the key protection features of the LTM4644MPY?
The device includes overvoltage, current, and temperature protection.
- What is the package type and dimensions of the LTM4644MPY?
The package is a 9mm x 15mm x 5.01mm BGA package.
- What is the operating temperature range of the LTM4644MPY?
The operating temperature range is -55°C to 125°C.
- Do I need additional external components for the LTM4644MPY?
No, only bulk input and output capacitors are needed.
- What are some typical applications of the LTM4644MPY?
Typical applications include multirail point of load regulation, powering FPGAs, DSPs, and ASICs, and general power management in various electronic systems.
