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reference designLT7153SP | Demoboard EVAL-LT7153SP-AZ

Analog Devices LT7153SP | Demoboard EVAL-LT7153SP-AZ

5V, ±25A High Efficiency Silent Switcher®2 Step-Down Regulator

Overview

TopologyBuck Converter
Input voltage2.7-5 V
Switching frequency950-1050 kHz
Output 10.5 V / 25 A

Description

The demonstration circuit EVAL-LT7153SP-AZ is a 5V, ±25A high efficiency synchronous step-down second-generation Silent Switcher® with spread spectrum frequency modulation featuring the LT®7153SP. The demo board is designed for 0.5V output from a 2.7V to 5V input, capable of delivering ±25A to the load. The LT7153SP is a compact, ultralow emission, high efficiency, and high speed synchronous monolithic step-down switching regulator. The integrated bypass capacitors optimize all the fast current loops and make it easier to minimize EMI/EMC emissions by reducing layout sensitivity. Selectable spread spectrum mode can further improve EMI/EMC performance. The unique constant frequency, controlled on-time, current mode architecture is ideal for high step-down ratio applications that operate at high frequencies while demanding fast transient response.

Features

  • Silent Switcher®2 Architecture
  • Ultralow EMI
  • Eliminates PCB Layout Sensitivity
  • Internal Bypass Caps Reduce Radiated EMI
  • SVIN: 2.7V to 5V; PVIN: 1.5V to 5V
  • VOUT: 0.5V to 0.9∙VIN
  • Accurate Reference: 0.5V ±0.8% Over Temp
  • Integrated N-MOSFETs: 1.8mΩ/0.7mΩ
  • 15ns Min On-Time: Low Duty Cycle Operation
  • Differential VOUT Remote Sense
  • Configurable Fixed Output Options
  • Programmable Load Line (3 settings)
  • Programmable Current Limit (3 settings)
  • Programmable, Synchronizable: 400kHz to 5MHz
  • User Selectable Discontinuous Mode® (DCM) orForced Continuous Mode (FCM) Operation
  • Controlled TON, Current Mode: Excellent Transient
  • Power Good status, Output Tracking, Clock-Out
  • Supports Spread Spectrum Operation
  • PolyPhase Operation: 2, 3, 4, 6, 8 or 12 Phases
  • 36-Lead (4mm x 7mm) Exposed Back LQFN Package

Typical applications

  • Distributed Power Systems, Server Power, Point-of-Load Supply (i.e., ASIC, FPGA, DSP, µP)

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(mΩ)
fres(MHz)
Material
Qty.
Z @ 100 MHz(Ω)
IR(A)
RDC max.(mΩ)
Z @ 25 MHz(Ω)
L(mm)
W(mm)
H(mm)
Version
Pins
Type
Mount
Working Voltage(V (AC))
Operating Temperature
Packaging
SamplesAvailability & Sample
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744316047
SPECWE-HCI SMT Flat Wire High Current Inductor, 0.47 µH, 19.5 A

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Inductance0.47 µH
Performance Rated Current19.5 A
Saturation Current @ 10%8 A
Saturation Current @ 30%16 A
DC Resistance2.75 mΩ
Self Resonant Frequency280 MHz
MaterialSuperflux 
Packaging Unit1500 
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DC Resistance3.025 mΩ
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Length5.5 mm
Width5.3 mm
Height4 mm
VersionSMT 
Pins2 
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MountSMT 
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Operating Temperature -40 °C up to +150 °C
–
–Check availability
7427930
SPECWE-PBF Flat Wire High Current SMT Ferrite Bead, –, –
Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-PBF Flat Wire High Current SMT Ferrite Bead
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Packaging Unit500 
Impedance @ 100 MHz42 Ω
Rated Current16 A
DC Resistance0.6 mΩ
Impedance @ 25 MHz28 Ω
Length5 mm
Width3 mm
Height2.55 mm
VersionNot Glued 
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MountSMT 
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Operating Temperature -55 °C up to +125 °C
–
–Check availability
60800213421
SPECWR-PHD Jumper, –, –
Simu­lation–
Availability
–
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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Packaging Unit1000 
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Rated Current3 A
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–
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–
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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
–
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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Packaging Unit1000 
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Rated Current2 A
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Length6 mm
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Pins3 
TypeStraight 
MountTHT 
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(nH)
LR(nH)
IR(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
SamplesAvailability & Sample
Log in now to view availability and request availability forecasts. LOGIN
744302007
SPECWE-HCM SMT High Current Flat Wire Inductor, 72 nH, 71 nH

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
–
Downloads9 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
Inductance72 nH
Rated Inductance71 nH
Rated Current30 A
Saturation Current @ 10%62 A
Saturation Current @ 30%64 A
DC Resistance0.235 mΩ
Self Resonant Frequency150 MHz
MaterialMnZn 
–Check availability