Overview
The LTM4644IY-1, produced by Analog Devices Inc., is a quad DC/DC step-down µModule (micromodule) regulator. This device is designed to provide high efficiency and versatility in power management. It features four independent output channels, each capable of delivering up to 4A of continuous current and 5A of peak current. The outputs can be paralleled to achieve higher current capabilities, up to 16A. The regulator includes switching controllers, power FETs, inductors, and support components, making it a comprehensive solution for various power supply needs.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4V to 14V (2.375V to 14V with external bias) |
| Output Voltage Range | 0.6V to 5.5V |
| Output Current per Channel | 4A DC, 5A Peak |
| Power Dissipation | Up to 5.5W (TA = 60°C, 200 LFM, No Heat Sink) |
| Total Output Voltage Regulation | ±1.5% |
| Control Mode | Current Mode Control |
| Transient Response | Fast Transient Response |
| Output Voltage Tracking | Supported |
| Internal Temperature Sensing | Diode Output |
| External Frequency Synchronization | Supported |
| Protection Features | Overvoltage, Current, and Temperature Protection |
| Package Dimensions | 9mm × 15mm × 5.01mm BGA Package |
Key Features
- Quad Output Step-Down µModule Regulator with 4A per Output
- Wide Input Voltage Range: 4V to 14V (2.375V to 14V with external bias)
- Output Voltage Range: 0.6V to 5.5V
- High Efficiency Design with 4A DC, 5A Peak Output Current per Channel
- Parallelable Outputs for Higher Current Capabilities (up to 16A)
- Output Voltage Tracking
- Internal Temperature Sensing Diode Output
- External Frequency Synchronization
- Overvoltage, Current, and Temperature Protection
- Compact 9mm × 15mm × 5.01mm BGA Package
Applications
- 4V to 14V Input, Quad 1.2V, 1.5V, 2.5V, and 3.3V Output with Tracking
- 2.375V to 5V Input, Quad 1V, 1.2V, 1.5V, 1.8V Output
- 4V to 14V Input, 4-Phase, 1.2V at 16A Design with Temperature Monitoring
- 12V and 5V Two Separate Input Rails, 1.2V at 8A and 3.3V at 8A Output
- Integration with PMBus Power System Management Supervisory ICs like the LTC2975
Q & A
- What is the input voltage range of the LTM4644IY-1?
The input voltage range is 4V to 14V, and it can be extended to 2.375V to 14V with an external bias supply.
- What is the output voltage range of the LTM4644IY-1?
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 of continuous current and 5A of peak current.
- Can the outputs be paralleled for higher current?
- What kind of protection features does the LTM4644IY-1 have?
The device includes overvoltage, current, and temperature protection features.
- What is the package size of the LTM4644IY-1?
The device is packaged in a 9mm × 15mm × 5.01mm BGA package.
- Does the LTM4644IY-1 support external frequency synchronization?
- What is the total output voltage regulation of the LTM4644IY-1?
The total output voltage regulation is ±1.5%.
- What is the power dissipation of the LTM4644IY-1?
The power dissipation is up to 5.5W (TA = 60°C, 200 LFM, No Heat Sink).
- Does the LTM4644IY-1 have internal temperature sensing?
