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reference designLTC7801

Analog Devices LTC7801

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

Overview

TopologyBuck Converter
Input voltage7-140 V
Switching frequency50-900 kHz
Output 112 V / 5 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

Parts approved by Analog Devices

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Order Code
Data­sheet
Simu­lation
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Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC max.(mΩ)
fres(MHz)
Wire Type
SamplesAvailability & Sample
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7443633300
SPECWE-HCF SMT High Current Inductor, 33 µH, 13.3 A

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCF SMT High Current Inductor
Inductance33 µH
Performance Rated Current13.3 A
Saturation Current @ 10%9.5 A
Saturation Current @ 30%11 A
DC Resistance12.54 mΩ
Self Resonant Frequency12 MHz
Wire TypeFlat 
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