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reference designLTC7803

Analog Devices LTC7803

40V Low IQ, 3MHz Synchronous Step-Down Controller with Spread Spectrum

Overview

TopologyBuck Converter
Input voltage4.5-38 V
Switching frequency100-3000 kHz
Output 15 V / 10 A

Description

The LTC®7803 is a high performance, 100% Duty Cycle Capable, synchronous step-down DC/DC switching regulator controller that drives an all N-channel power MOSFET stage. Synchronous rectification increases efficiency, reduces power losses and eases thermal requirements. A constant frequency current mode architecture allows a phase-lockable switching frequency of up to 3MHz. The LTC7803 operates from a wide 4.5V to 40V input supply range.

Features

  • Low Operating IQ: 12μA (14V VIN to 3.3V VOUT)
  • Wide Input Voltage Range: 4.5V to 40V
  • Output Voltage Up to 40V
  • Spread Spectrum Operation
  • RSENSE or DCR Current Sensing
  • PassThru™/100% Duty Cycle Capable
  • Programmable Fixed Frequency (100kHz to 3MHz)
  • Phase-Lockable Frequency (100kHz to 3MHz)
  • Selectable Continuous, Pulse-Skipping, or Low Ripple Burst ModeR Operation at Light Loads
  • Low Shutdown IQ: 1.2μA
  • Thermally Enhanced 16-Pin 3mm × 3mm QFN and MSOP Packages
  • AEC-Q100 Qualification in Progress

Typical applications

  • Automotive and Transportation
  • Telecommunications
  • Industrial
  • Military/Avionics

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
Qty.
SamplesAvailability & Sample
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744313180
SPECWE-HCI SMT Flat Wire High Current Inductor, 1.8 µH, 19.5 A
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Inductance1.8 µH
Performance Rated Current19.5 A
Saturation Current @ 10%8 A
Saturation Current @ 30%22 A
DC Resistance5.6 mΩ
Self Resonant Frequency48 MHz
MaterialSuperflux 
Packaging Unit400 
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