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reference designLT7170-1 | Demoboard EVAL-LT7170-1-AZ

Analog Devices LT7170-1 | Demoboard EVAL-LT7170-1-AZ

20A, 16V Dual-Phase Silent Switcher Step-Down Regulator with Digital Power System Management

Overview

TopologyBuck Converter
Input voltage1.5-16 V
Output 11 V / 20 A

Description

Evaluation kit EVAL-LT7170-1-AZ is a dual-phase single-output monolithic DC/DC synchronous step-down regulator with a 2.9V or 1.5V with EXTVCC to 16V input range featuring LT®7170-1. The output can supply 20A continuous load current. The Silent Switcher® regulator structure is incorporated into the LT7170-1 to minimize EMI and reduce PCB layout sensitivity. It also integrates digital power system management functionality, allowing for programmability and telemetry with a PMBus/I2C compliant serial interface. Refer to the LT7170-1 data sheet for more detailed information.

Features

  • Silent Switcher® architecture: enables a compact, efficient, low EMI solution
  • PMBus/I2C serial interface
  • Telemetry read back includes VOUT, IOUT, VIN, die temperature, and faults
  • Programmable voltage, current limit, sequencing, soft start and stop, undervoltage and overvoltage, phase, frequency (up to 4 MHz), and loop compensation
  • Integrated three times programmable NVM
  • Key parameters selectable by resistor
  • VOUT set point range: 0.4 V to 5.5 V
  • VOUT accuracy: ±0.25%, 0.6 V ≤ VOUT ≤ 1.375 V
  • Differential remote VOUT sense
  • Fast transient response
  • Wide VIN supply range: down to 2.9 V or 1.5 V with EXTVCC
  • Programmable and synchronizable: 400 kHz to 4 MHz
  • 24-lead (3.5 mm × 4 mm) LQFN package

Typical applications

  • Communications
  • industrial systems
  • Data center and solid state drives

More information

Parts approved by Analog Devices

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC max.(mΩ)
fres(MHz)
Z @ 100 MHz(Ω)
Zmax(Ω)
Test Condition Zmax
IR(mA)
Z @ 1 GHz(Ω)
H(mm)
Type
Pins
Mount
L(mm)
Working Voltage(V (AC))
Operating Temperature
Packaging
SamplesAvailability & Sample
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74437336010
SPECWE-LHMI SMT Power Inductor, 1 µH, 8.6 A
Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-LHMI SMT Power Inductor
Inductance1 µH
Performance Rated Current8.6 A
Saturation Current @ 10%7.4 A
Saturation Current @ 30%14.2 A
DC Resistance14 mΩ
Self Resonant Frequency60 MHz
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Height2.8 mm
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Pins2 
MountSMT 
Length5.7 mm
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Operating Temperature -40 °C up to +125 °C
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–Check availability
74279226101
SPECWE-MPSB EMI Multilayer Power Suppression Bead, –, –
Simu­lation
Availability
–
Downloads10 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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DC Resistance6 mΩ
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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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MountSMT 
Length4.5 mm
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Operating Temperature -55 °C up to +125 °C
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–Check availability
60800213421
SPECWR-PHD Jumper, –, –
Simu­lation–
Availability
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Downloads3 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWR-PHD Jumper
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Rated Current3000 mA
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Pins2 
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Working Voltage200 V (AC)
Operating Temperature -25 °C up to +105 °C
PackagingBag 
–Check availability
62000311121
SPECWR-PHD Pin Header, –, –
Simu­lation–
Availability
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Downloads7 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header
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Rated Current2000 mA
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TypeStraight 
Pins3 
MountTHT 
Length6 mm
Working Voltage200 V (AC)
Operating Temperature -40 °C up to +105 °C
PackagingBag 
–Check availability

Additional parts recommended by Würth Elektronik

Recommended parts are Würth Elektronik alternatives that are not formally approved for this reference design. Please verify it is suitable for your application, and contact us if you have any questions.

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
RDC max.(mΩ)
fres(MHz)
Mount
SamplesAvailability & Sample
Log in now to view availability and request availability forecasts. LOGIN
744393240047
SPECWE-XHMI SMT Power Inductor, 0.47 µH, 17.1 A
Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-XHMI SMT Power Inductor
Inductance0.47 µH
Performance Rated Current17.1 A
Saturation Current @ 30%19.2 A
DC Resistance3.9 mΩ
DC Resistance4.5 mΩ
Self Resonant Frequency105 MHz
MountSMT 
–Check availability