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reference designLT8336 | Demoboard DC2505A

Analog Devices LT8336 | Demoboard DC2505A

40V, 2.5A, Low IQ Synchronous Step-Up Silent Switcher

Overview

TopologyBoost Converter
Input voltage8-20 V
Switching frequency300-3000 kHz
Output 124 V / 1.5 A

Description

The LT8336 is a low IQ, synchronous step-up DC/DC converter. It features Silent Switcher architecture and optional spread spectrum frequency modulation to minimize EMI emissions while delivering high efficiencies at high switching frequencies.The wide input/output voltage range, low VIN pin quiescent current in Burst Mode operation, and 100% duty cycle capability for the synchronous MOSFET in passthrough operation (VIN ≥ VOUT), make the LT8336 ideally suited for general purpose step-up and automotive preboost applications.The LT8336 integrates 40V, 2.5A power switches, operating at a fixed switching frequency programmable between 300kHz and 3MHz and synchronizable to an external clock. Pulse-skipping or Burst Mode operation can be selected, with or without spread-spectrum frequency modulation, to optimize efficiency and EMI performance.The LT8336 features output soft-start, an output power good flag and output overvoltage lockout.

Features

  • Silent Switcher® Architecture
  • Ultralow EMI Emissions
  • Optional Spread Spectrum Frequency Modulation
  • Integrated 40V, 2.5A Power Switches
  • Wide Input/Output Voltage Range: 2.7V to 40V
  • Low VIN Pin Quiescent Current:
  • 0.3µA in Shutdown
  • 4µA in Burst Mode® Operation
  • 15µA in Pass Through (VIN > VOUT)
  • 100% Duty Cycle Capability for Synchronous MOSFET
  • Adjustable and Synchronizable: 300kHz to 3MHz
  • Pulse-Skipping or Burst Mode Operation at Light Load
  • Output Soft-Start and Power Good Monitor
  • Internal Compensation
  • Accurate 1V Enable Pin Threshold
  • Small 16-Lead (3mm × 3mm) LQFN Package
  • AEC-Q100 Qualification in Progress

Typical applications

  • Automotive and Industrial Power Supplies / General Purpose Step-Up

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
f(mm)
L(µH)
ISAT1(A)
ISAT2(A)
fres(MHz)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
VOP(V)
Z @ 100 MHz(Ω)
Zmax(Ω)
Test Condition Zmax
IR 2(mA)
RDC max.(Ω)
Type
Pins
Mount
L(mm)
H(µm)
IR(mA)
Working Voltage(V (AC))
Operating Temperature
SamplesAvailability & Sample
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742792040
SPECWE-CBF SMT EMI Suppression Ferrite Bead, –, –
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-CBF SMT EMI Suppression Ferrite Bead
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Impedance @ 100 MHz600 Ω
Maximum Impedance700 Ω
Maximum Impedance150 MHz 
Rated Current 22000 mA
DC Resistance0.15 Ω
TypeHigh Current 
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MountSMT 
Length2 mm
Height0.9 µm
Rated Current1500 mA
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Operating Temperature -55 °C up to +125 °C
–Check availability
62001021121
SPECWR-PHD Pin Header, –, –
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header
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TypeStraight 
Pins10 
MountTHT 
Length10 mm
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Rated Current2000 mA
Working Voltage200 V (AC)
Operating Temperature -40 °C up to +105 °C
–Check availability
702934000
SPECWA-SNSR Self-Retaining Spacer, 4.8 mm, –
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Downloads3 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWA-SNSR Self-Retaining Spacer
Drilling in Panel4.8 mm
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Length11.1 mm
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Operating Temperature -30 °C up to +85 °C
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74479299147
SPECWE-PMCI Power Molded Chip Inductor, –, 0.47 µH
Simu­lation
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Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PMCI Power Molded Chip Inductor
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Inductance0.47 µH
Saturation Current 15.15 A
Saturation Current 29.95 A
Self Resonant Frequency90 MHz
Performance Rated Current7.1 A
Saturation Current @ 30%9.95 A
DC Resistance18 mΩ
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Rated Current 23600 mA
DC Resistance0.022 Ω
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Pins2 
MountSMT 
Length3.2 mm
Height1200 µm
Rated Current7100 mA
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Operating Temperature -40 °C up to +125 °C
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60800213421
SPECWR-PHD Jumper, –, –
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Jumper
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Pins2 
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Rated Current3000 mA
Working Voltage200 V (AC)
Operating Temperature -25 °C up to +105 °C
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74438357068
SPECWE-MAPI SMT Power Inductor, –, 6.8 µH

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
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Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
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Inductance6.8 µH
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Self Resonant Frequency19.5 MHz
Performance Rated Current3.75 A
Saturation Current @ 30%7.2 A
DC Resistance69.4 mΩ
Operating Voltage80 V
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DC Resistance0.074 Ω
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Pins2 
MountSMT 
Length4.3 mm
Height3100 µm
Rated Current3000 mA
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Operating Temperature -40 °C up to +125 °C
–Check availability