company blog about ADI LTM4644IY Quad DC/DC Step-Down Power Module Regulator With Configurable 4A Output Array

ADI LTM4644IY Quad DC/DC Step-Down Power Module Regulator With Configurable 4A Output Array

Shenzhen Mingjiada Electronics Co., Ltd., as a professional supplier of electronic components, is now offering ADI's high-performance LTM4644IY four-channel DC/DC buck μModule (micro-module) regulator to the market. This advanced power management solution, with its compact design, high efficiency, and multi-channel output capability, is an ideal choice for power systems in high-performance electronic devices such as FPGAs, DSPs, and ASICs.

Product Overview Of LTM4644IY

The LTM4644IY is a complete four-channel output buck μModule regulator, with each channel capable of delivering 4A continuous current (5A peak) output capability. Through parallel configuration, the four channels can be combined into an output array of up to 16A, meeting the requirements of high-current applications.

The LTM4644IY module utilises ADI's advanced power packaging technology, integrating the switch controller, power MOSFETs, inductors, and all necessary support components into a compact 9mm × 15mm × 5.01mm BGA package. This significantly simplifies system design, requiring only external input and output capacitors to complete the power supply design.

Specifications Of LTM4644IY

Output Voltage: 600 mV to 5.5 V

Output Current: 4 A

Number of Outputs: 4 Output

Input Voltage - Min: 4 V

Input Voltage - Max: 14 V

Quiescent Current: 11 uA

Switching Frequency: 1 MHz

Minimum Operating Temperature: - 40 C

Maximum Operating Temperature: + 125 C

Input Voltage: 4 V to 14 V

Load Regulation: 0.5 %

Moisture Sensitive: Yes

Operating Supply Current: 2 mA

Unit Weight: 1.896 g

Key Features Of LTM4644IY

Electrical Characteristics

Wide input voltage range: 4V to 14V (standard mode) or 2.375V to 14V (with external bias)

Output voltage range: 0.6V to 5.5V (independently adjustable per channel)

Output current: 4A continuous current per channel (5A peak), up to 16A when four channels are paralleled

Output voltage accuracy: ±1.5% total regulation accuracy

Operating temperature range: -40°C to 125°C

Performance Advantages

High-efficiency design: Utilises current-mode control for fast transient response

Parallel capability: Supports multiple modules in parallel for higher output current

Output voltage tracking: Supports power rail sequencing functionality

Protection features: Integrated overvoltage, overcurrent, and over-temperature protection circuits

Thermal management: Internal temperature detection diode output for system thermal monitoring

Application Of LTM4644IY

The LTM4644IY, with its multi-channel, high integration, and flexible configuration features, is widely applied in the following areas:

Multi-rail point-of-load regulation: Provides multi-voltage rail power solutions for complex electronic systems

FPGA/DSP/ASIC power supply: Meets the power requirements of high-performance processors for multi-voltage and high-current applications

Communication equipment: Base stations, network switches, and other devices requiring high-efficiency power supplies

Industrial control systems: PLCs, industrial computers, and other high-reliability applications

Test and measurement equipment: Provides stable multi-channel power supplies for precision instruments

Technical Advantages Of LTM4644IY

Highly Integrated Design

The LTM4644IY employs ADI's μModule technology, integrating all key components required for a DC/DC converter into a compact BGA package, including:

Switching controller

Power MOSFET

Inductor

Compensation network

Support components

This integrated design significantly reduces the number of external components, simplifies PCB layout, and enhances system reliability.

Flexible Configuration Capabilities

The LTM4644IY module supports multiple operating modes:

Independent four-channel mode: Each channel provides independent output from 0.6V to 5.5V/4A

Parallel mode: Four channels in parallel provide up to 16A output current

Tracking mode: Power rail sequencing via the TRACK/SS pin

Synchronisation functionality: Supports external clock synchronisation to reduce system noise

Exceptional thermal performance

Despite its high integration, the LTM4644IY excels in thermal design:

Under conditions of TA=60°C and 200LFM airflow, power dissipation can reach 5.5W (without a heat sink)

Internal temperature detection diodes facilitate system thermal management

The compact BGA package optimises thermal conduction paths