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reference designLTC7150S | Demoboard LT Journal Aug 2018

Analog Devices LTC7150S | Demoboard LT Journal Aug 2018

20V, 20A Synchronous Step-Down Regulator

Overview

TopologyBuck Converter
Input voltage3.1-20 V
Switching frequency400-3000 kHz
Output 11 V / 20 A
IC revision1

Description

LT Journal Aug 2018The LTC.7150S is a high efficiency monolithic synchronous buck regulator capable of delivering 20A to the load. It uses a phase lockable controlled on-time constant frequency,current mode architecture. PolyPhase operation allows multiple LTC7150S regulators to run out-of-phase, which reduces the amount of input and output capacitors required. The operating supply voltage range is from 3.1V to 20V. The operating frequency is programmable from 400kHz to 3MHz with an external resistor. The high frequency capabilityallows the use of physically smaller inductor and capacitor sizes. For switching noise sensitive applications, the LTC7150S can be externally synchronized from 400kHz to 3MHz. The PHMODE pin allows the user control of the phase of the outgoing clock signal. The unique constant frequency/controlled on-time architecture is ideal for high step-down ratio applications that operate at high frequencies while demanding fast transient response.The LTC7150S uses second generation Silent Switcher technology including integrated bypass capacitors to deliver a highly efficient solution at high frequencies with excellent EMI performance.

Features

  • Silent Switcher®2 Architecture for Low EMI
  • VIN Range: 3.1V to 20V
  • VOUT Range: 0.6V to 5.5V
  • Differential VOUT Remote Sense
  • Adjustable Frequency: 400kHz to 3MHz
  • PolyPhase® Operation: Up to 12 Phases
  • Output Tracking and Soft-Start
  • Reference Accuracy: 0.6V ±1% Over Temperature
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Accurate 1.2V Run Pin Threshold
  • Supports Forced Continuous/Discontinuous Modes
  • 42-Lead 6mm × 5mm × 1.3mm BGA Package

Typical applications

  • Distributed Power Systems / Point of Load Supply for ASIC, FPGA, DSP, μP
  • Server Power Applications

More information

Parts approved by Analog Devices

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Data­sheet
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Downloads
Status
Product series
VOP(V)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
Z @ 100 MHz(Ω)
Zmax(Ω)
Test Condition Zmax
IR(mA)
Z @ 1 GHz(Ω)
H(mm)
Type
SamplesAvailability & Sample
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74279226101
SPECWE-MPSB EMI Multilayer Power Suppression Bead, –, –
Simu­lation
Availability
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-MPSB EMI Multilayer Power Suppression Bead
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Impedance @ 100 MHz100 Ω
Maximum Impedance160 Ω
Maximum Impedance1100 MHz 
Rated Current8000 mA
Impedance @ 1 GHz150 Ω
Height2.3 mm
TypeHigh Current 
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744308033
SPECWE-HCM SMT High Current Flat Wire Inductor, 80 V, 54 A
Simu­lation
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCM SMT High Current Flat Wire Inductor
Operating Voltage80 V
Performance Rated Current54 A
Saturation Current @ 10%29 A
Saturation Current @ 30%38 A
DC Resistance0.37 mΩ
Self Resonant Frequency39 MHz
MaterialMnZn 
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Rated Current25000 mA
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Height6.8 mm
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