LTM8028

RECOMMENDED FOR NEW DESIGNS

36VIN, UltraFast, Low Output Noise 5A μModule (Power Module) Regulator

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Overview

  • High Performance 5A Linear Regulator with Switching Step-Down Converter for High Efficiency
  • Digitally Programmable VOUT: 0.8V to 1.8V
  • Input Voltage Range: 6V to 36V
  • Very Tight Tolerance Over Temperature, Line, Load and Transient Response
  • Low Output Noise: 40μVRMS (10Hz to 100kHz)
  • Parallel Multiple Devices for 10A or More
  • Accurate Programmable Current Limit to Allow Asymmetric Power Sharing
  • Analog Output Margining: ±10% Range
  • Synchronization Input
  • Stable with Low ESR Ceramic Output Capacitors
  • 15mm × 15mm × 4.92mm Surface Mount BGA Package
  • SnPb or RoHS Compliant Finish

The LTM8028 is a 36VIN, 5A μModule® (power module) regulator, consisting of an UltraFast™ 5A linear regulator preceded by a high efficiency switching regulator. In addition to providing tight output regulation, the linear regulator automatically controls the output voltage of the switcher to provide optimal efficiency and headroom for dynamic response.

The output voltage is digitally selectable in 50mV increments over a 0.8V to 1.8V range. An analog margining function allows the user to adjust system output voltage over a continuous ±10% range, and a single-ended feedback sense line may be used to mitigate IR drops due to parasitic resistance.

The LTM8028 is packaged in a compact (15mm × 15mm × 4.92mm) overmolded ball grid array (BGA) package suitable for automated assembly by standard surface mount equipment. The LTM8028 is available with SnPb (BGA) or RoHS compliant terminal finish.

Applications

  • FPGA and DSP Supplies
  • High Speed I/O
  • ASIC and Microprocessor Supplies
  • Servers and Storage Devices
LTM8028
36VIN, UltraFast, Low Output Noise 5A μModule (Power Module) Regulator
Low Output Noise, 1.2V, 5A μModule Regulator Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 1

Technical Articles 4

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Battery Charger ICs 2
LTM8052
LTM8052A
36VIN, 5A, 2-Quadrant CVCC Step-Down μModule Regulator
LTM8026
RECOMMENDED FOR NEW DESIGNS 36VIN, 5A CVCC Step-Down μModule (Power Module) Regulator
Power System Management (PSM) & Sequencers 1
LTC2977
RECOMMENDED FOR NEW DESIGNS 8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement
Switching Regulators & Controllers 2
LTM4612
RECOMMENDED FOR NEW DESIGNS EN55022B Compliant 36VIN, 15VOUT, 5A, DC/DC μModule (Power Module) Regulator
LTM4606
RECOMMENDED FOR NEW DESIGNS Ultralow EMI 28VIN, 6A DC/DC μModule Regulator
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTM8028
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC1738A

LTM8028EY Demo Board | µModule Regulator with Low Noise LDO Post-Regulator, 6V ≤ VIN ≤ 36V, VOUT = 0.8V to 1.8V @ 5A

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Product Details

Demonstration circuit 1738A features the LTM8028, a μModule® step-down converter that integrates both a high efficiency switching regulator and a 5A UltraFast™ linear regulator, resulting in a low noise solution suitable for high speed data applications. The demo circuit is designed for an input voltage of 6V to 36V and an operating frequency of 250kHz. The output voltage is digitally programmable from 0.8V to 1.8V in 50mV increments by adjusting the three tri-state inputs VO0, VO1, and VO2.
DC1738A
LTM8028EY Demo Board | µModule Regulator with Low Noise LDO Post-Regulator, 6V ≤ VIN ≤ 36V, VOUT = 0.8V to 1.8V @ 5A
DC1738A - Schematic

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