company blog about Mingjiada Electronics Supply ADI LTM4613 Ultralow Noise, 8A Switch Mode DC/DC µModule Regulator

Mingjiada Electronics Supply ADI LTM4613 Ultralow Noise, 8A Switch Mode DC/DC µModule Regulator

In telecommunications, industrial, avionics and RF systems, power supply noise and EMI often directly determine the performance of the signal chain. Shenzhen Mingjiada Electronics Co., Ltd. has long been a supplier of the LTM4613, an ultra-low-noise, 8A switch-mode DC/DC µModule regulator from ADI (Analog Devices). This device integrates an inductor, power MOSFET, DC/DC controller and compensation circuit within a compact LGA package, combining high power density with ultra-low output noise. It is suitable for noise-sensitive power supply designs in high-performance ADCs/DACs, communications infrastructure, test and measurement, medical imaging and industrial automation.

The LTM4613 is a complete, ultra-low-noise, 8A switch-mode DC/DC power supply from ADI. The package incorporates a switch controller, power FETs, an inductor and all supporting components. The LTM4613 operates over an input voltage range of 5 V to 36 V and supports an output voltage range of 3.3 V to 15 V (set by a single external resistor). The design requires only large-capacity input and output capacitors.

The LTM4613 integrated input filter and noise cancellation circuitry provide low-noise coupling, thereby effectively reducing electromagnetic interference (EMI). Furthermore, this DC/DC μModule® regulator can be synchronised to an external clock to reduce unwanted frequency harmonics and enable PolyPhase® operation for delivering high load currents.

The LTM4613 is designed for applications requiring medium- to high-voltage inputs and low-noise outputs. Key specifications are as follows:
Input voltage: 5 V to 36 V
Output voltage: 3.3 V to 15 V (single-resistor setting)
Output current: 8 A continuous
Maximum total DC error: ±2%
Switching architecture: Adaptive on-time current-mode
EMI compliance: Complies with EN55022 Class B
Package: 15 mm × 15 mm × 4.32 mm LGA / 15 mm × 15 mm × 4.92 mm BGA
Protection Features: Overcurrent clamping, output overvoltage protection, programmable soft-start, PGOOD, voltage tracking and margin adjustment
Extensibility: Supports PLL external clock synchronisation and multi-phase (PolyPhase) parallel current sharing

Key Features of the LTM4613:
8A Output Current: A single device can provide 8A of continuous output, with support for current sharing in parallel to achieve higher currents.
Wide Input Voltage: Input range of 4.5V to 20V, compatible with common system buses such as 5V and 12V.
Adjustable Output: Output voltage from 0.6V to 5V, meeting the requirements of a wide range of low-voltage digital and analogue loads.
Ultra-low-noise design: Low output ripple and noise, suitable for powering ADCs, DACs, RF circuits and precision instruments.
Complete µModule solution: Integrates an inductor, power MOSFET, controller and compensation circuitry, simplifying peripheral design.
Compact package: 15 mm × 15 mm × 2.8 mm LGA package, saving PCB space.
Multi-phase and parallel operation: Supports multi-phase operation and current sharing in parallel, facilitating current scaling or optimisation of thermal performance.
Frequency synchronisation: Supports PLL frequency synchronisation with an adjustable switching frequency, facilitating avoidance of sensitive frequency bands.
Remote Sampling: Supports remote output voltage sampling to compensate for line voltage drops.
Soft-Start and Tracking: Programmable soft-start and output voltage tracking enhance system power-up reliability.
Comprehensive Protection: Features overcurrent, overvoltage and over-temperature protection.
Wide Operating Temperature Range: Operating temperature range of –40°C to 125°C, suitable for industrial applications.

Typical Applications for the LTM4613:
Telecommunications and networking equipment
Industrial and avionics equipment
RF systems
High-performance ADC/DAC power supplies
Communications base stations, optical transmission and networking equipment
Test, measurement and data acquisition systems
Medical imaging and precision medical instruments
Industrial automation and PLC control
RF transceivers and RF front-ends
FPGAs, DSPs and low-noise digital loads
Multi-phase, high-current power rail designs

Why is the LTM4613 suitable for ‘noise-sensitive systems’?
Traditional discrete DC/DC solutions often face three major challenges: switching noise crosstalk, difficulties with EMI certification, and lengthy PCB layout and debugging cycles.
The design philosophy behind the LTM4613 is to ‘encapsulate the power engineer’s expertise within the module’:
On-board input filtering + noise cancellation circuitry​
Reduces input/output reference noise and minimises interference from switching harmonics to ADCs, PLLs and RF transceiver chains.
High switching frequency + adaptive on-time control​
Delivers ultra-fast transient response to input voltage and load transients without compromising loop stability.
EN55022 Class B EMI performance​
Under typical operating conditions, such as 24V to 12V conversion at 8A, this significantly reduces the design burden associated with external magnetic shielding, ferrite beads and EMI filters.
Single-resistor output configuration, minimal peripherals​
Design can be completed with only high-capacity input/output capacitors and a small number of RC components, shortening the NPI cycle.

Frequently Asked Questions (FAQ)
Q1: What is the output current of the LTM4613?
A: The LTM4613 delivers 8A of continuous output current and supports current sharing in parallel to achieve higher currents.
Q2: What are the input and output voltage ranges of the LTM4613?
A: The input voltage range is 4.5V to 20V, and the output voltage range is 0.6V to 5V.
Q3: For which applications is the LTM4613 suitable?
A: It is suitable for noise-sensitive applications such as ADC/DAC power supplies, communications equipment, test and measurement, medical instruments, industrial control and RF systems.
Q4: Does Mingjiada Electronics stock the LTM4613?
A: Mingjiada Electronics maintains a long-term stock of ADI products and supports both sample and bulk procurement of the LTM4613. Please contact our sales team for specific stock availability and quotations.

As high-performance analogue and communications systems place ever-increasing demands on power supply noise, power density and reliability, the ADI LTM4613—with its ultra-low noise, 8A output, fully integrated µModule design and compact package—has become the ideal choice for noise-sensitive power supply designs. Mingjiada Electronics will continue to maintain stock to provide customers with a stable and reliable supply chain.

Mingjiada Electronics consistently supplies the ADI LTM4613 µModule regulator; the entire range consists of brand-new, genuine products. We hold ample stock of models across multiple temperature grades and can fulfil sample orders, small-batch trial production and large-scale mass production orders. For further product details regarding the LTM4613 or to enquire about sample prices, please visit the Mingjiada Electronics website (https://www.integrated-ic.com/) for more supply information.
Tags: LTM4613IV, LTM4613I, LTM4613