LTM4636-1

RECOMMENDED FOR NEW DESIGNS

40A μModule Regulator with Overvoltage/Overtemperature Protection

Data Sheet (Rev. B) Product Selection Table
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Overview

  • Overtemperature, Input/Output Overvoltage Protection
  • Trips Upstream Power Source or Circuit Breaker
  • Stacked Inductor Acts as Heat Sink
  • Wide Input Voltage Range: 4.7V to 15V
  • 0.6V to 3.3V Output Voltage Range
  • ±1.3% Total DC Output Voltage Error (–40°C to 125°C)
  • Differential Remote Sense Amplifier for Precision Regulation
  • Current Mode Control/Fast Transient Response
  • Frequency Synchronization
  • Parallel Current Sharing (Up to 240A)
  • 88% Efficiency (12VIN, 1VOUT) at 40A
  • Overcurrent Foldback Protection
  • Overtemperature Shutdown
  • 16mm × 16mm × 7.07mm BGA Package

The LTM4636-1 is a 40A step-down μModule® (power module) switching regulator with stacked inductor as a heat sink for heat dissipation and cooler operation in a small package. The LTM4636-1 detects overtemperature and input/output overvoltage conditions and can trip an upstream power supply or circuit breaker to protect itself and its load. The exposed inductor as a heat sink permits direct contact with airflow from any direction. The LTM4636-1 can deliver 40W (12VIN, 1VOUT, 40A, 200LFM) with only 40°C rise over the ambient temperature. Full-power 40W is delivered up to 83°C ambient and half-power 20W is supported at 110°C ambient.

The LTM4636-1 operates at 92%, 90% and 88% efficiency delivering 15A, 30A and 40A, respectively, to a 1V load (12VIN). The μModule regulator is scalable where four in current sharing deliver 160W with only 40°C rise and 88% efficiency (12VIN, 1VOUT, 400LFM). The LTM4636-1 is offered in 16mm × 16mm × 7.07mm BGA package.

Notes
LTM4636 Simpler circuits and fewer features
LTM4636-1 Extra internal circuitry for detecting overtemperature and input/output overvoltage conditions

Applications

  • Telecom Servers and Networking Equipment
  • Industrial Equipment and Medical Systems
LTM4636-1
40A μModule Regulator with Overvoltage/Overtemperature Protection
LTM4636-1 Application Circuit LTM4636-1 Performance Graph Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Power System Management (PSM) & Sequencers 1
LTC2975
RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement
Protection Switches & Controllers 1
LTC4218
RECOMMENDED FOR NEW DESIGNS Hot Swap Controller
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LTM4636
  • LTM4636-1

LTpowerCAD 1

Design tools for the following parts are available in LTpowerCAD:

  • LTM4636
  • LTM4636-1
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.

LTpowerCAD

LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

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DC2448A-D

LTM4636-1PolyPhase 160A Step-Down Power µModule Regulator with Overvoltage and Overtemperature Protection

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Product Details

Demonstration circuit DC2448A-D features a PolyPhase® design using the LTM4636-1EY, a 40A high efficiency, switch mode step-down power µModule® regulator with overvoltage and overtemperature protection features. The input voltage range is from 9V to 15V. The output voltage range is 0.6V to 3.3V. The DC2448A-D can deliver a nominal 160A output current. DC2448A-D has on-boardhot swap circuit that can disconnect input supply and protect the LTM4636-1 and the load under overvoltage and overtemperature conditions. As explained in the data sheet, output current derating is necessary for certain VIN, VOUT and thermal conditions. The board operates in continuous conduction mode in heavy load conditions.

For high efficiency at low load currents, the MODE_PLLIN jumper selects pulse-skipping mode for noise sensitive applications or Burst Mode® operation in less noise sensitive applications. The MODE_PLLIN pin also allows the LTM4636-1 to synchronize to an external clock signal. DC2448A-D has the option of choosing both internal and external compensation circuits for LTM4636-1. The LTM4636-1 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC2448A-D.

eval board
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DC2230A-B

LTM4636-1 Demo Board | Buck µModule Regulator with Overvoltage/Temperature Protection, Stacked Inductor; 4.7V ≤ VIN ≤ 15V, VOUT = 1V @ 40A

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Product Details

Demonstration circuit 2230A-B features the LTM4636-1EY, a 40A high efficiency, switch mode step-down power μModule® regulator with overtemperature and input/output overvoltage protection. The input voltage range is from 4.7V to 15V. For a 4.7V to 5.5V input voltage range, short PVCC pin to the VIN pin with R8 = R21 = 0Ω and remove R17. The output voltage range is 0.6V to 3.3V. Derating is necessary for certain VIN, VOUT, frequency and thermal conditions. The board operates in continuous conduction mode with heavy load conditions. For high efficiency at low load currents, the MODE_PLLIN jumper selects pulse-skipping mode for noise sensitive applications or Burst Mode® operation in less noise sensitive applications. The MODE_PLLIN pin also allows the LTM463-16 to synchronize to an external clock signal. DC2230A-B has the option of choosing either internal or external compensation circuit for the LTM4636-1. Tying the PHASMD pin to a different voltage generates a certain phase difference between the MODE_PLLIN and CLKOUT pins. The LTM4636-1 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC2230A-B.
DC2448A-D
LTM4636-1PolyPhase 160A Step-Down Power µModule Regulator with Overvoltage and Overtemperature Protection
DC2448A-D Application Circuit DC2448A-D Application Circuit DC2448A-D Image DC2448A-D Application Circuit
DC2230A-B
LTM4636-1 Demo Board | Buck µModule Regulator with Overvoltage/Temperature Protection, Stacked Inductor; 4.7V ≤ VIN ≤ 15V, VOUT = 1V @ 40A
DC2230A-B Demo Board DC2230A-B Demo Board DC2230A-B Demo Board DC2230A-B Demo Board DC2230A-B - Demo Board Image

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