IC manufacturers Analog Devices

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Analog Devices LTC7890 | Demoboard EVAL-LTC7890-AZ

High Frequency, Dual Output, Step-Down Supply with EPC GaN FETs

Overview

TopologyBuck Converter
Input voltage14-72 V
Switching frequency500-600 kHz
Output 112 V / 20 A
Output 25 V / 20 A

Description

Evaluation circuit EVAL-LTC7890-AZ is a dual output synchronous step-down converter that drives all N-channel gallium nitride (GaN) field effect transistors (FETs). The EVAL-LTC7890-AZ evaluation board features EPC2218 100V FETs from EPC.EVAL-LTC7890-AZ features the LTC®7890: a low quiescent current high frequency (programmable fixed frequency from 100kHz up to 3MHz) dual step-down DC/DC synchronous controller, with a dedicated driver feature for GaN FETs housed in a small 6mm × 6mm QFN package.

Features

  • GaN drive technology fully optimized for GaN FETs
  • Wide VIN range: 4 V to 100 V
  • Wide output voltage range: 0.8 V ≤ VOUT ≤ 60 V
  • No catch, clamp, or bootstrap diodes needed
  • Internal smart bootstrap switches prevent overcharging of high-side driver supplies
  • Internally optimized, smart near zero dead times or resistor adjustable dead times
  • Split output gate drivers for adjustable turn on and turn off driver strengths
  • Accurate adjustable driver voltage and UVLO
  • Low IQ: 5 μA (48 VIN to 5 VOUT, Ch 1 On)
  • Programmable frequency (100 kHz to 3 MHz)
  • Synchronizable frequency (100 kHz to 3 MHz)
  • Spread spectrum frequency modulation
  • 40-lead (6 mm × 6 mm), side wettable, QFN package

Typical applications

  • Cabin Experience and Infotainment Solutions; Rear Seat Entertainment and Cluster Display Solutions
  • Data Center Solutions ; Server Equipment
  • Industrial power systems
  • Medical Systems

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
fres
(MHz)
Wire TypeL
(mm)
TiØ OD
(mm)
Ø ID
(mm)
Qty.Pins
(pcs)
RowsH
(mm)
GenderTypeIR
(A)
Packaging Samples
7443642010200SPEC
10 files Active i| Production is active. Expected lifetime: >10 years.WE-HCF SMT High Current Inductor 2 50.3 25.5 30 0.92 30 Flat 19.8 10 50.3
9774010243RSPEC

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.

6 files Active i| Production is active. Expected lifetime: >10 years.WA-SMSI SMT Steel Spacer with internal Thread M2 1 M2 4.35 2.8 1500 Tape and Reel
60800213421SPEC
3 files Active i| Production is active. Expected lifetime: >10 years.WR-PHD 2.00 mm Jumper with Test Point 1000 2 Jumper 3 Bag
62000621121SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.WR-PHD 2.00 mm THT Dual Pin Header 6 1000 6 Dual Pin Header Straight 2 Bag
Order Code Data­sheet Simu­lation
7443642010200SPEC
9774010243RSPEC

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.

60800213421SPEC
62000621121SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
fres
(MHz)
Wire TypeL
(mm)
TiØ OD
(mm)
Ø ID
(mm)
Qty.Pins
(pcs)
RowsH
(mm)
GenderTypeIR
(A)
Packaging Samples