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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

Products

Order Code Data­sheet Simu­lation Downloads Product seriesL
(mm)
f
(mm)
L
(µH)
ISAT1
(A)
ISAT2
(A)
fres
(MHz)
VersionIRP,40K
(A)
ISAT,30%
(A)
RDC typ.
(mΩ)
V
(V)
MountZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR 2
(mA)
RDC max.
(Ω)
TypePinsRowsH
(mm)
GenderIR
(mA)
Packaging Samples
742792040SPEC
9 files WE-CBF SMT EMI Suppression Ferrite Bead 2 SMT SMT 600 700 150 MHz 2000 0.15 High Current 0.9 1500
74479299147SPEC
8 files WE-PMCI Power Molded Chip Inductor 3.2 0.47 5.15 9.95 90 High Saturation Current 11.05 SMT 3600 0.022 2 1.2 11050
74438357068SPEC
9 files WE-MAPI SMT Power Inductor 4 6.8 19.5 SMT 3.75 7.2 69.4 80 SMT 0.074 2 3.1 3000
62001021121SPEC
6 files WR-PHD 2.00 mm THT Dual Pin Header 10 THT Straight 10 Dual Pin Header 2000 Bag
702934000SPEC
3 files WA-SNSR Self-Retaining Spacer 11.1 4.8
60800213421SPEC
3 files WR-PHD 2.00 mm Jumper with Test Point 2 Jumper 3000 Bag
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesL
(mm)
f
(mm)
L
(µH)
ISAT1
(A)
ISAT2
(A)
fres
(MHz)
VersionIRP,40K
(A)
ISAT,30%
(A)
RDC typ.
(mΩ)
V
(V)
MountZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR 2
(mA)
RDC max.
(Ω)
TypePinsRowsH
(mm)
GenderIR
(mA)
Packaging Samples