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Analog Devices LTC7890 | Demoboard EVAL-LTC7890-AZ
High Frequency, Dual Output, Step-Down Supply with EPC GaN FETs
Overview
| Topology | Buck Converter |
| Input voltage | 14-72 V |
| Switching frequency | 500-600 kHz |
| Output 1 | 12 V / 20 A |
| Output 2 | 5 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
More information
Products
| 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 | L (mm) | Ti | Ø OD (mm) | Ø ID (mm) | Qty. | Pins (pcs) | Pitch (mm) | Rows | H (mm) | Gender | Type | IR (A) | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 7443642010200 | SPEC | 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 | – | ||
 | 9774010243R | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet 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 | |
 | 60800213421 | SPEC | – | 3 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD Jumper | – | – | – | – | – | – | – | – | – | – | – | 1000 | 2 | 2 | – | – | Jumper | – | 3 | Bag | |
 | 62000621121 | SPEC | – | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD Pin Header | – | – | – | – | – | – | – | 6 | – | – | – | 1000 | 6 | 2 | Dual | – | Pin Header | Straight | 2 | Bag |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 7443642010200 | SPEC | |
| 9774010243R | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | – |
| 60800213421 | SPEC | – |
| 62000621121 | SPEC | – |
| Samples |
|---|
| 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 | L (mm) | Ti | Ø OD (mm) | Ø ID (mm) | Qty. | Pins (pcs) | Pitch (mm) | Rows | H (mm) | Gender | Type | IR (A) | Packaging | Samples |
|---|
