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Analog Devices LT8390 | Demoboard LT Journal
60V Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum
Overview
| Topology | Buck-Boost Converter |
| Input voltage | 0-48 V |
| Switching frequency | 150-650 kHz |
| Output 1 | 12 V |
| IC revision | 1 |
Description
The LT®8390 is a synchronous 4-switch buck-boost DC/DCcontroller that regulates output voltage, input or outputcurrent from an input voltage above, below, or equal tothe output voltage. The proprietary peak-buck/peak-boostcurrent mode control scheme allows adjustable and synchronizable150kHz to 650kHz fixed frequency operation, orinternal ±15% triangle spread spectrum frequency modulationfor low EMI. With a 4V to 60V input voltage range, 0Vto 60V output voltage capability, and seamless low-noisetransitions between operation regions, the LT8390 is idealfor voltage regulator, battery and supercapacitor chargerapplications in automotive, industrial, telecom, and evenbattery-powered systems.The LT8390 provides input or output current monitor andpower good flag. Fault protection is also provided to detectoutput short-circuit condition, during which the LT8390retries, latches off, or keeps running.
Features
4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUTSynchronous Switching: Up to 98% EfficiencyProprietary Peak-Buck Peak-Boost Current ModeWide VIN Range: 4V to 60V±1.5% Output Voltage Accuracy: 1V ≤ VOUT ≤ 60V±3% Input or Output Current Accuracy with MonitorSpread Spectrum Frequency Modulation for Low EMIHigh Side PMOS Load Switch DriverIntegrated Bootstrap DiodesNo Top MOSFET Refresh Noise in Buck or BoostAdjustable and Synchronizable: 150kHz to 650kHzVOUT Disconnected from VIN During ShutdownAvailable in 28-Lead TSSOP with Exposed Pad and 28-Lead QFN (4mm × 5mm)
Typical applications
- Automotive, Industrial, Telecom Systems
- High Power Battery-Powered System
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (mΩ) | Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 744314150 | 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. | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-HCI SMT Flat Wire High Current Inductor | 1.5 | 16.4 | 4 | 11 | 4.3 | 110 | Superflux | – | – | – | – | 4.73 | – | ||
| 744325420 | 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. | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-HCI SMT Flat Wire High Current Inductor | 4.2 | 15.4 | 5 | 14 | 7.1 | 33 | Superflux | – | – | – | – | 7.87 | – | ||
 | 7443640470 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-HCF SMT High Current Inductor | 4.7 | 34.95 | 70 | 78 | 2.4 | 20 | MnZn | – | – | – | – | 2.64 | – | ||
 | 742792118 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | – | 600 | 650 | 80 MHz | 2500 | 70 | High Current |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 744314150 | 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. | |
| 744325420 | 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. | |
| 7443640470 | SPEC | |
| 742792118 | SPEC |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (mΩ) | Type | Samples |
|---|