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reference designLTC7151S | Demoboard DC2615A

Analog Devices LTC7151S | Demoboard DC2615A

LTC7151S High Efficiency 15A Silent Switcher Buck Regulator

Overview

TopologyBuck Converter
Input voltage3.1-20 V
Output 11.2 V / 15 A

Description

Demonstration circuit 2615A features the LTC7151S in a high efficiency 1.2V/15A step-down regulator with an input voltage range of 3.1V to 20V and a 1MHz switching frequency. The Silent Switcher®2 technology reduces the switching noise while the internal MOSFETs of the LTC7151S provide high efficiency over a wide input voltage range. No current sense resistor is required.The LTC7151S employs a controlled on-time, valley current mode architecture. This architecture allows for a short minimum on-time which is ideal for high stepdown ratios. In addition, the architecture provides a fast load step response by allowing the switch node pulses to compress after the load steps up – see Figure 6.The LTC7151S data sheet provides a complete description of the IC operation and application information. The data sheet must be read in conjunction with the quick start guide.

Features

  • Silent Switcher®2 Architecture for Low EMI
  • VIN Range: 3.1V to 20V
  • VOUT Range: 0.5V to 5.5V
  • Differential VOUT Remote Sense
  • Adjustable Frequency: 400kHz to 3MHz
  • Poly Phase® Operation: Up to 12 Phases
  • Output Tracking and Soft-Start
  • Reference Accuracy: ±1% Over temperature
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Accurate 1.2V Run Pin Threshold
  • Supports Forced Continuous/Discontinuous Modes
  • 28-Lead Thermally Enhanced 4mm × 5mm × 0.74mm LQFN Package

Typical applications

  • Automotive and Industrial Power Supplies, Server Power Applications, Point-of-Load Supply for ASIC, FPGA, DSP, µP, etc.
  • Distributed Power Systems

More information

Parts approved by Analog Devices

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Product series
f(mm)
L(nH)
LR(nH)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
Pins
Type
Mount
L(mm)
H(mm)
IR(A)
Working Voltage(V (AC))
Operating Temperature
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744308020
SPECWE-HCM SMT High Current Flat Wire Inductor, –, 200 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.

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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
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Inductance200 nH
Rated Inductance198 nH
Saturation Current @ 10%44 A
Saturation Current @ 30%50.4 A
DC Resistance0.37 mΩ
Self Resonant Frequency45 MHz
MaterialMnZn 
Pins2 
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MountSMT 
Length10.1 mm
Height6.8 mm
Rated Current25 A
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Operating Temperature -40 °C up to +125 °C
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–Check availability
62000421121
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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Pins4 
TypeStraight 
MountTHT 
Length4 mm
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Rated Current2 A
Working Voltage200 V (AC)
Operating Temperature -40 °C up to +105 °C
PackagingBag 
–Check availability
702935000
SPECWA-SNSR Self-Retaining Spacer, 4.8 mm, –
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Availability
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Downloads3 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWA-SNSR Self-Retaining Spacer
Drilling in Panel4.8 mm
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MaterialPA66 
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Length12.7 mm
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Operating Temperature -30 °C up to +85 °C
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60800213421
SPECWR-PHD Jumper, –, –
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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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Pins2 
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Rated Current3 A
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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–
–
–
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Pins3 
TypeStraight 
MountTHT 
Length6 mm
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Rated Current2 A
Working Voltage200 V (AC)
Operating Temperature -40 °C up to +105 °C
PackagingBag 
–Check availability