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reference designLT7809 | Demoboard EVAL-LT7809-AZ

Analog Devices LT7809 | Demoboard EVAL-LT7809-AZ

135V Buck Controller with Dynamically Adjustable Output Voltage

Overview

TopologyBuck Converter
Input voltage0-135 V
Output 162.9 V / 5 A

Description

The evaluation circuit EVAL-LT7809-AZ features the LT7809: a 135V synchronous buck controller with symmetrical sink/source capability and dynamically adjustable output voltage programming.

Features

The EVAL-LT7809-AZ operates from a 16V to 100V input voltage range and generates a 60V, 5A output. Using the VOUTADJ feature, the output voltage can be lowered from60V down to 4V without skipping cycles. The EVAL-LT7809-AZ is set to a 500kHz switching frequency, which results in a small and efficient circuit.

The EVAL-LT7809-AZ supports output voltages from 0.8V to 100V. The evaluation circuit has been designed with 150V FETs. Various FETs of similar footprint can be substituted to fit a wide array of applications.

The EVAL-LT7809-AZ is a high-performance, flexible step-down regulator that can adjust its output voltage on-the-fly. The LT7809 data sheet gives a complete description of this part, its operation, and application information. The data sheet must be read in conjunction with this user guide for the EVAL-LT7809-AZ.

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 max.(mΩ)
fres(MHz)
Wire Type
Pins
Type
Mount
L(mm)
H(mm)
IR(A)
Working Voltage(V (AC))
Operating Temperature
SamplesAvailability & Sample
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7443631500
SPECWE-HCF SMT High Current Inductor, 15 µH, 15.4 A
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCF SMT High Current Inductor
Inductance15 µH
Performance Rated Current15.4 A
Saturation Current @ 10%19 A
Saturation Current @ 30%21 A
DC Resistance9.57 mΩ
Self Resonant Frequency12.8 MHz
Wire TypeFlat 
Pins2 
–
MountSMT 
Length20.8 mm
Height13.5 mm
Rated Current14 A
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Operating Temperature -40 °C up to +125 °C
–Check availability
62000821121
SPECWR-PHD Pin Header, –, –
Simu­lation–
Availability
–
Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header
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–
–
–
–
–
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Pins8 
TypeStraight 
MountTHT 
Length8 mm
–
Rated Current2 A
Working Voltage200 V (AC)
Operating Temperature -40 °C up to +105 °C
–Check availability