Datasheet LT8390 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 60V Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum |
| Pages / Page | 32 / 1 — FEATURES. DESCRIPTION. 4-Switch Single Inductor Architecture Allows VIN. … |
| File Format / Size | PDF / 1.2 Mb |
| Document Language | English |
FEATURES. DESCRIPTION. 4-Switch Single Inductor Architecture Allows VIN. Above, Below or Equal to VOUT
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LT8390 60V Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum
FEATURES DESCRIPTION
n
4-Switch Single Inductor Architecture Allows VIN
The LT®8390 is a synchronous 4-switch buck-boost DC/DC
Above, Below or Equal to VOUT
controller that regulates output voltage, input or output n
Synchronous Switching: Up to 98% Efficiency
current from an input voltage above, below, or equal to n
Proprietary Peak-Buck Peak-Boost Current Mode
the output voltage. The proprietary peak-buck/peak-boost n
Wide VIN Range: 4V to 60V
current mode control scheme allows adjustable and syn- n
±1.5% Output Voltage Accuracy: 1V ≤ VOUT ≤ 60V
chronizable 150kHz to 650kHz fixed frequency operation, n
±3% Input or Output Current Accuracy with Monitor
or internal ±15% triangle spread spectrum frequency n
Spread Spectrum Frequency Modulation for Low EMI
modulation for low EMI. With a 4V to 60V input voltage n High Side PMOS Load Switch Driver range, 0V to 60V output voltage capability, and seamless low n Integrated Bootstrap Diodes noise transitions between operation regions, the LT8390 n No Top MOSFET Refresh Noise in Buck or Boost is ideal for voltage regulator, battery and supercapacitor n Adjustable and Synchronizable: 150kHz to 650kHz charger applications in automotive, industrial, telecom, n VOUT Disconnected from VIN During Shutdown and even battery-powered systems. n Available in 28-Lead TSSOP with Exposed Pad and The LT8390 provides input or output current monitor and 28-Lead QFN (4mm × 5mm) power good flag. Fault protection is also provided to detect output short-circuit condition, during which the LT8390
APPLICATIONS
retries, latches off, or keeps running. n Automotive, Industrial, Telecom Systems L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners. n High Power Battery-Powered System
TYPICAL APPLICATION 98% Efficient 48W (12V 4A) Miniature Buck-Boost Voltage Regulator
4mΩ 6uH 15mΩ V V OUT IN 12V 4V TO 56V 22µF 4A 4.7µF 10µF 0.1µF 0.1µF 63V 100V SW1 LSP LSN SW2 25V 120µF 120µF ×2 ×2 BST1 BST2 ×2 16V 16V
Efficiency vs VIN
BG1 BG2 100 GND TG1 TG2 98 VIN LT8390 VOUT 96 1µF 1µF 383k EN/UVLO ISP 94 165k LOADTG ISN 100k 92 TEST FB EFFICIENCY (%) SSFM OFF ISMON ISMON SYNC/SPRD 9.09k 90 IOUT LIMIT 6.7A CTRL INTVCC SSFM ON 88 4.7µF IOUT = 4A LOADEN 100k 86 VREF PGOOD PGOOD 0 10 20 30 40 50 60 0.47µF SS VC RT INPUT VOLTAGE (V) 8390 TA01a 8390 TA01b 100k 0.1µF 100pF 27k 400kHz 4.7nF 8390fa For more information www.linear.com/LT8390 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
FEATURES DESCRIPTION
n
4-Switch Single Inductor Architecture Allows VIN
The LT®8390 is a synchronous 4-switch buck-boost DC/DC
Above, Below or Equal to VOUT
controller that regulates output voltage, input or output n
Synchronous Switching: Up to 98% Efficiency
current from an input voltage above, below, or equal to n
Proprietary Peak-Buck Peak-Boost Current Mode
the output voltage. The proprietary peak-buck/peak-boost n
Wide VIN Range: 4V to 60V
current mode control scheme allows adjustable and syn- n
±1.5% Output Voltage Accuracy: 1V ≤ VOUT ≤ 60V
chronizable 150kHz to 650kHz fixed frequency operation, n
±3% Input or Output Current Accuracy with Monitor
or internal ±15% triangle spread spectrum frequency n
Spread Spectrum Frequency Modulation for Low EMI
modulation for low EMI. With a 4V to 60V input voltage n High Side PMOS Load Switch Driver range, 0V to 60V output voltage capability, and seamless low n Integrated Bootstrap Diodes noise transitions between operation regions, the LT8390 n No Top MOSFET Refresh Noise in Buck or Boost is ideal for voltage regulator, battery and supercapacitor n Adjustable and Synchronizable: 150kHz to 650kHz charger applications in automotive, industrial, telecom, n VOUT Disconnected from VIN During Shutdown and even battery-powered systems. n Available in 28-Lead TSSOP with Exposed Pad and The LT8390 provides input or output current monitor and 28-Lead QFN (4mm × 5mm) power good flag. Fault protection is also provided to detect output short-circuit condition, during which the LT8390
APPLICATIONS
retries, latches off, or keeps running. n Automotive, Industrial, Telecom Systems L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners. n High Power Battery-Powered System
TYPICAL APPLICATION 98% Efficient 48W (12V 4A) Miniature Buck-Boost Voltage Regulator
4mΩ 6uH 15mΩ V V OUT IN 12V 4V TO 56V 22µF 4A 4.7µF 10µF 0.1µF 0.1µF 63V 100V SW1 LSP LSN SW2 25V 120µF 120µF ×2 ×2 BST1 BST2 ×2 16V 16V
Efficiency vs VIN
BG1 BG2 100 GND TG1 TG2 98 VIN LT8390 VOUT 96 1µF 1µF 383k EN/UVLO ISP 94 165k LOADTG ISN 100k 92 TEST FB EFFICIENCY (%) SSFM OFF ISMON ISMON SYNC/SPRD 9.09k 90 IOUT LIMIT 6.7A CTRL INTVCC SSFM ON 88 4.7µF IOUT = 4A LOADEN 100k 86 VREF PGOOD PGOOD 0 10 20 30 40 50 60 0.47µF SS VC RT INPUT VOLTAGE (V) 8390 TA01a 8390 TA01b 100k 0.1µF 100pF 27k 400kHz 4.7nF 8390fa For more information www.linear.com/LT8390 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
