Overview
The LTM4644IY is a quad DC/DC step-down µModule regulator produced by Analog Devices Inc., formerly Linear Technology Corporation. This module integrates switching controllers, power FETs, inductors, and support components into a single package, making it a comprehensive solution for power management needs. It supports an input voltage range of 4V to 14V, or 2.375V to 14V with an external bias supply, and offers an output voltage range of 0.6V to 5.5V. Each channel can deliver up to 4A of continuous output current and 5A peak, with the capability to parallel outputs for higher current requirements up to 16A.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Input Voltage Range | 4V to 14V (2.375V to 14V with external bias) | V |
| Output Voltage Range | 0.6V to 5.5V | V |
| Output Current per Channel | 4A DC, 5A Peak | A |
| Power Dissipation | Up to 5.5W (TA = 60°C, 200 LFM, No Heat Sink) | W |
| Total Output Voltage Regulation | ±1.5% | % |
| Operating Temperature Range | -40°C to 125°C | °C |
| Package Dimensions | 9mm × 15mm × 5.01mm | mm |
| Package Type | BGA |
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
- Current Mode Control, Fast Transient Response
- Parallelable for Higher Output Current (up to 16A)
- Output Voltage Tracking
- Internal Temperature Sensing Diode Output
- External Frequency Synchronization
- Overvoltage, Current, and Temperature Protection
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 such as the LTC2975
Q & A
- What is the input voltage range of the LTM4644IY?
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 LTM4644IY?
The output voltage range is 0.6V to 5.5V.
- How much output current can each channel deliver?
Each channel can deliver up to 4A of continuous output current and 5A peak.
- Can the outputs be paralleled for higher current?
- What kind of protection does the LTM4644IY offer?
The LTM4644IY offers overvoltage, current, and temperature protection.
- What is the operating temperature range of the LTM4644IY?
The operating temperature range is -40°C to 125°C.
- What is the package type and dimensions of the LTM4644IY?
The package type is BGA, with dimensions of 9mm × 15mm × 5.01mm.
- Does the LTM4644IY support external frequency synchronization?
- What is the power dissipation capability of the LTM4644IY?
The power dissipation capability is up to 5.5W (TA = 60°C, 200 LFM, No Heat Sink).
- Does the LTM4644IY have internal temperature sensing?
