IC reference design search
IC manufacturers Analog Devices

IC manufacturers (104)

reference designLT8642S | Demoboard DC2560A

Analog Devices LT8642S | Demoboard DC2560A

18V, 10A Synchronous Step-Down Silent Switcher

Overview

TopologyBuck Converter
Input voltage2.8-18 V
Switching frequency1925-2075 kHz
Output 11.2 V / 10 A

Description

Demonstration circuit 2560A is a 18V, 10A synchronous step-down Silent Switcher®2 with spread spectrum frequency modulation featuring the LT®8642S. The demo board is designed for 1.2V output from a 2.8V to 18Vinput. The LT8642S 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. Fast minimum on-time of 20ns enables high VIN to low VOUT conversion at highfrequency.

Features

  • Silent Switcher®2 Architecture
  • Ultralow EMI Emissions On Any PCB
  • Eliminates PCB Layout Sensitivity
  • Internal Bypass Capacitors Reduce Radiated EMI
  • Optional Spread Spectrum Modulation
  • High Efficiency at High Frequency
  • Up to 96% Efficiency at 1MHz, 12VIN to 3.3VOUT
  • Up to 95% Efficiency at 2MHz, 12VIN to 3.3VOUT
  • Wide Input Voltage Range: 2.8V to 18V
  • 10A Output Current
  • External Compensation: Fast Transient Response and Current Sharing
  • Low Quiescent Current Burst Mode® Operation
  • 240µA IQ Regulating 12VIN to 1.2VOUT
  • Output Ripple < 10mVP-P
  • Fast Minimum Switch On-Time: 25ns
  • Low Dropout Under All Conditions: 50mV at 1A
  • Forced Continuous Mode
  • Adjustable and Synchronizable: 200kHz to 3MHz
  • Output Soft-Start and Power Good
  • Small 24-Lead 4mm × 4mm LQFN Package

Typical applications

  • Server Power Applications
  • General Purpose Step-Down

More information

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesf
(mm)		Z @ 100 MHz
(Ω)		Zmax
(Ω)		Test Condition ZmaxIR
(mA)		Z @ 1 GHz
(Ω)		H
(mm)		TypePinsMountL
(mm)		Working Voltage
(V (AC))		 Samples
74279228600SPEC
10 files

EDA models: Components
ZIP

CAD files
ZIP

Electric models
ZIP

Download all 10 files as zip archive
ZIP

 Active i| Production is active. Expected lifetime: >10 years.WE-MPSB EMI Multilayer Power Suppression Bead – 60 99 458 MHz 5100 74 0.8 High Current – SMT 1.6 –
702935000SPEC
–3 files

CAD files
ZIP

Download all 3 files as zip archive
ZIP

 Active i| Production is active. Expected lifetime: >10 years.WA-SNSR Self-Retaining Spacer 4.8 – – – – – – – – – 12.7 –
60800213421SPEC
–3 files

CAD files
ZIP

Download all 3 files as zip archive
ZIP

 Active i| Production is active. Expected lifetime: >10 years.WR-PHD Jumper – – – – 3000 – – – 2 – – 200
62000821121SPEC
–7 files

EDA models: Components
ZIP

CAD files
ZIP

 Active i| Production is active. Expected lifetime: >10 years.WR-PHD Pin Header – – – – 2000 – – Straight 8 THT 8 200
Order Code Data­sheet Simu­lation
74279228600SPEC
702935000SPEC
–
60800213421SPEC
–
62000821121SPEC
–
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesf
(mm)		Z @ 100 MHz
(Ω)		Zmax
(Ω)		Test Condition ZmaxIR
(mA)		Z @ 1 GHz
(Ω)		H
(mm)		TypePinsMountL
(mm)		Working Voltage
(V (AC))		 Samples
Online Evaluations