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reference designLT8337-1

Analog Devices LT8337-1

Overview

TopologyBoost Converter
Input voltage4.5-10 V
Switching frequency300-3000 kHz
Output 112 V / 1.5 A

Description

The LT8337/LT8337-1 is a low IQ, synchronous step-up DC/DC converter. It features Silent Switcher architecture and optional spread spectrum frequency modulation (SSFM) 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 PassThru operation (VIN > VOUT) makes the LT8337/LT8337-1 ideally suited for battery-powered systems and general purpose step-up applications.The LT8337/LT8337-1 integrates 28V, 5A power switches, operating at a fixed switching frequency programmable between 300kHz and 3MHz and synchronizable to an external clock. The LT8337/LT8337-1 features output soft-start and output overvoltage lockout.The LT8337-1 allows external compensation via the VC pin for fast transient response. The LT8337 offers an output power good flag via the PG pin.

Features

  • Silent Switcher® Architecture
  • Ultralow EMI Emissions
  • Optional Spread Spectrum Frequency Modulation
  • Integrated 28V, 5A Power Switches
  • Wide Input Voltage Range: 2.7V to 28V
  • Output Voltage Programmable Up to 26V
  • Low VIN Pin Quiescent Current
  • 0.3μA in Shutdown
  • 4μA in Burst Mode® Operation (LT8337)
  • 15μA in PassThru™ (LT8337)
  • 100% Duty Cycle Capability for Synchronous MOSFET
  • External Compensation: Fast Transient Response (LT8337-1)
  • Power Good Monitor (LT8337)
  • Adjustable and Synchronizable: 300kHz to 3MHz
  • Pulse-Skipping or Burst Mode Operation at Light Load
  • Small 16-Lead (3mm × 3mm) LQFN Package

Typical applications

  • Battery-Powered Systems, General Purpose Step-Up

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IR(A)
ISAT1(A)
ISAT2(A)
fres(MHz)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
VOP(V)
Mount
Z @ 100 MHz(Ω)
Zmax(Ω)
Test Condition Zmax
IR 2(mA)
RDC max.(mΩ)
Type
SamplesAvailability & Sample
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74479290125
SPECWE-PMCI Power Molded Chip Inductor, 0.25 µH, 9.05 A
Simu­lation
Availability
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Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PMCI Power Molded Chip Inductor
Inductance0.25 µH
Rated Current9.05 A
Saturation Current 18.5 A
Saturation Current 215.65 A
Self Resonant Frequency150 MHz
Performance Rated Current9.05 A
Saturation Current @ 30%15.65 A
DC Resistance26 mΩ
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MountSMT 
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Rated Current 24000 mA
DC Resistance31 mΩ
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74438357015
SPECWE-MAPI SMT Power Inductor, 1.5 µH, 6.2 A

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
Inductance1.5 µH
Rated Current6.2 A
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Self Resonant Frequency48 MHz
Performance Rated Current8.2 A
Saturation Current @ 30%11 A
DC Resistance17.1 mΩ
Operating Voltage80 V
MountSMT 
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DC Resistance20 mΩ
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–Check availability
742792040
SPECWE-CBF SMT EMI Suppression Ferrite Bead, –, 1.5 A
Simu­lation
Availability
–
Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-CBF SMT EMI Suppression Ferrite Bead
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Rated Current1.5 A
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MountSMT 
Impedance @ 100 MHz600 Ω
Maximum Impedance700 Ω
Maximum Impedance150 MHz 
Rated Current 22000 mA
DC Resistance150 mΩ
TypeHigh Current 
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