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reference designLTC3311S | Demoboard DC3018A

Analog Devices LTC3311S | Demoboard DC3018A

3.3V to 1.2V at 12.5A, 2MHz Low EMI Buck Regulator in a 1.17cm2 Solution

Overview

TopologyBuck Converter
Input voltage2.25-5.5 V
Switching frequency1800-2200 kHz
Output 11.22 V / 12.5 A

Description

Demonstration Circuit 3018A features the LTC®3311S 12.5A, low voltage, synchronous step-down Silent Switcher® 2 operating as a 2MHz 3.3V to 1.2V 12.5A buck regulator. The LTC3311S supports output voltages from 0.5V to VIN with operating frequencies from 500kHz up to 5MHz. The LTC3311S 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. Fast minimum on-time of 35ns enables high VIN to low VOUT conversion at high frequency.

More information

Parts approved by Analog Devices

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Order Code
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Product series
C
Tol. C
VR(V (DC))
Size
DF(%)
RISO
Ceramic Type
W(mm)
Fl(mm)
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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885012205053
SPECWCAP-CSGP MLCCs 25 V(DC), 33 nF, ±10%
Simu­lation
Availability
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Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 25 V(DC)
Capacitance33 nF
Capacitance±10% 
Rated Voltage25 V (DC)
Size0402 
Dissipation Factor3.5 %
Insulation Resistance10 GΩ
Ceramic TypeX7R Class II 
Width0.5 mm
Pad Dimension0.25 mm
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Height0.5 mm
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Length1 mm
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Operating Temperature -55 °C up to +125 °C
Packaging7" Tape & Reel 
–Check availability
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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Size1812 
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Width3.2 mm
Pad Dimension0.46 mm
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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Insulation Resistance1000 MΩ
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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 
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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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Insulation Resistance1000 MΩ
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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