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reference designLTC7800

Analog Devices LTC7800

Low IQ, 60V, High Frequency Synchronous Step-Down Controller

Overview

TopologyBuck Converter
Input voltage12.5-28 V
Switching frequency320-2250 kHz
Output 112 V / 10 A

Description

The LTC®7800 is a high performance step-down switchingregulator DC/DC controller that drives an all N-channelsynchronous power MOSFET stage. A constant frequencycurrent mode architecture allows a phase-lockablefrequency of up to 2.25MHz.

Features

Wide VIN Range: 4V to 60V (65V Abs Max)n Low Operating IQ: 50μAn Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 24Vn RSENSE or DCR Current Sensingn Phase-Lockable Frequency (320kHz to 2.25MHz)n Programmable Fixed Frequency (320kHz to2.25MHz)n Selectable Continuous, Pulse-Skipping or Low RippleBurst Mode® Operation at Light Loadn Selectable Current Limitn Very Low Dropout Operation: 98% Duty Cyclen Adjustable Output Voltage Soft-Start or Trackingn Power Good Output Voltage Monitorn Output Overvoltage Protectionn Low Shutdown IQ: < 14μAn Internal LDO Powers Gate Drive from VIN or EXTVCCn No Current Foldback During Start-Upn Small 20-Pin 3mm × 4mm QFN Package

Typical applications

  • Battery Powered Digital Devices,Distributed DC Power Systems
  • Automotive Always-On Systems

More information

Products

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Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
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SamplesAvailability & Sample
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744314047
SPECWE-HCI SMT Flat Wire High Current Inductor, 0.47 µH, 31.9 A
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Inductance0.47 µH
Performance Rated Current31.9 A
Saturation Current @ 10%9 A
Saturation Current @ 30%20 A
DC Resistance1.35 mΩ
Self Resonant Frequency235 MHz
MaterialSuperflux 
Packaging Unit1000 
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