LT8390

RECOMMENDED FOR NEW DESIGNS

60V Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum

Data Sheet (Rev. D) Product Selection Table
Part Models
32
1ku List Price
Starting From $5.48
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Part Details

  • 4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT
  • Synchronous Switching: Up to 98% Efficiency
  • Proprietary Peak-Buck Peak-Boost Current Mode
  • Wide VIN Range: 4V to 60V
  • ±1.5% Output Voltage Accuracy: 1V ≤ VOUT ≤ 60V
  • ±3% Input or Output Current Accuracy with Monitor
  • Spread Spectrum Frequency Modulation for Low EMI
  • High Side PMOS Load Switch Driver
  • Integrated Bootstrap Diodes
  • No Top MOSFET Refresh Noise in Buck or Boost
  • Adjustable and Synchronizable: 150kHz to 650kHz
  • VOUT Disconnected from VIN During Shutdown
  • Available in 28-Lead TSSOP with Exposed Pad and 28-Lead QFN (4mm × 5mm)
  • AEC-Q100 Qualified for Automotive Applications
LT8390
60V Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum
LT8390 Application Circuit LT8390 Performance Graph LT8390 Pin Configuration LT8390 Pin Configuration
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 3

Design Note 1

Technical Articles 2

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Hardware Ecosystem

Parts Product Life Cycle Description
PowerPath, Ideal Diodes, and Load Switches 1
LTC4359
RECOMMENDED FOR NEW DESIGNS Ideal Diode Controller with Reverse Input Protection
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LTC4367
RECOMMENDED FOR NEW DESIGNS 100V Overvoltage, Undervoltage and Reverse Supply Protection Controller
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT8390
  • LT8390A

LTpowerCAD 2

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTpowerCAD

LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

eval board
schematic 1
DC2825A

LT8390 Demo Board | 12VOUT, 120W Synchronous 4-Switch Buck-Boost Regulator

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Product Details

Demonstration circuit 2825A is a 4-switch synchronous buck-boost regulator that demonstrates the medium power capability of the LT8390. The output is 12V and the maximum output current is 10A for up to 120W power delivery. The switching frequency is 300kHz and efficiency can exceed 96%. 

The steady-state operating input voltage range of DC2825A in which the temperature of the components is less than 90°C is from 9V to 22V. The transient operating input voltage range of DC2825A is from 7V to 36V. The output voltage and EN/UVLO are all programmed by resistor dividers. EN/UVLO is set so the circuit will turn off when the input voltage falls below 7V and will turn on when the input voltage rises above 8V.

eval board
schematic 2
schematic 3
schematic 4
schematic 5
DC2457A

LT8390 Demo Board | Sync Buck-Boost Controller, 4V ≤ VIN ≤ 60V, VOUT = 12V @ 4A (Fsw=400kHz)

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Product Details

Demonstration circuit DC2457A is a 12V, 4A, 4-switch synchronous buck-boost regulator featuring low EMI noise and small footprint. It runs at 400kHz switching frequency. Spread spectrum frequency modulation (SSFM) can be turned on with a simple jumper, reducing EMI. DC2457A also comes with other low EMI features including optimized layout, input and output filters. It passes CISPR 25 class 5 conducted and radiated EMI.



eval board
schematic 6
schematic 7
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DC2431A

LT8390EFE Demo Board | Sync Buck-Boost, 9V ≤ VIN ≤ 36V, VOUT = 12V @ 25A

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Product Details

Demonstration circuit 2431A is a 4-switch synchronous buck-boost regulator that demonstrates the high power capability of the LT8390. The output is 12V and the maximum output current is 25A for up to 300W power delivery. The switching frequency is 150kHz and efficiency can go higher than 98%.


 
DC2825A
LT8390 Demo Board | 12VOUT, 120W Synchronous 4-Switch Buck-Boost Regulator
DC2825A
DC2457A
LT8390 Demo Board | Sync Buck-Boost Controller, 4V ≤ VIN ≤ 60V, VOUT = 12V @ 4A (Fsw=400kHz)
DC2457A Evaluation Board DC2457A Evaluation Board - Top View DC2457A Evaluation Board - Bottom View DC2457A - Schematic
DC2431A
LT8390EFE Demo Board | Sync Buck-Boost, 9V ≤ VIN ≤ 36V, VOUT = 12V @ 25A
DC2431A Demo Board DC2431A Demo Board DC2431A Demo Board DC2431A Demo Board DC2431A - Schematic

Latest Discussions

49 Weeks Ago
RE: Different results for FRA using LTpowerCAD and LTspice, Specifically LT8643S and LT8390
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