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reference designLTC7801

Analog Devices LTC7801

150V Low IQ, Synchronous Step-Down DC/DC Controller

Overview

TopologyBuck Converter
Input voltage12-40 V
Switching frequency50-900 kHz
Output 13.3 V / 10 A

Description

The LTC®7801 is a high performance step-down switchingregulator DC/DC controller that drives an all N-channelsynchronous power MOSFET stage that can operate frominput voltages up to 140V. A constant frequency currentmode architecture allows a phase-lockable frequency ofup to 850kHz.

Features

Wide VIN Range: 4V to 140V (150V Abs Max)nn Wide Output Voltage Range: 0.8V to 60Vnn Adjustable Gate Drive Level: 5V to 10V (OPTI-DRIVE)nn Low Operating IQ: 40μA (Shutdown = 10μA)nn 100% Duty Cycle Operationnn No External Bootstrap Diode Requirednn Selectable Gate Drive UVLO Thresholdsnn Onboard LDO or External NMOS LDO for DRVCCnn EXTVCC LDO Powers Drivers from VOUTnn Phase-Lockable Frequency (75kHz to 850kHz)nn Programmable Fixed Frequency (50kHz to 900kHz)nn Selectable Continuous, Pulse-Skipping or Low RippleBurst Mode® Operation at Light Loadsnn Adjustable Burst Clampnn Power Good Output Voltage Monitornn Programmable Input Overvoltage Lockoutnn Small 24-Lead 4mm × 5mm QFN or TSSOP Packages

Typical applications

  • High Voltage Battery Operated Systems
  • Automotive and Industrial Power Systems,Telecommunications Power Systems

More information

Products

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Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC max.(mΩ)
Material
LR(µH)
fres(MHz)
SamplesAvailability & Sample
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7443310330
SPECWE-HCC SMT High Current Cube Inductor, 3.3 µH, 15.5 A
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCC SMT High Current Cube Inductor
Inductance3.3 µH
Performance Rated Current15.5 A
Saturation Current @ 10%19.2 A
Saturation Current @ 30%38.9 A
DC Resistance7.7 mΩ
MaterialIron Powder 
Rated Inductance3.2 µH
Self Resonant Frequency50 MHz
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