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LT3741 Datasheet(PDF) 1 Page - Linear Technology |
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LT3741 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 32 page  LT8390 1 8390fa For more information www.linear.com/LT8390 TYPICAL APPLICATION FEATURES DESCRIPTION 60V Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum TheLT®8390isasynchronous4-switchbuck-boostDC/DC controller that regulates output voltage, input or output current from an input voltage above, below, or equal to the output voltage. The proprietary peak-buck/peak-boost current mode control scheme allows adjustable and syn- chronizable 150kHz to 650kHz fixed frequency operation, or internal ±15% triangle spread spectrum frequency modulation for low EMI. With a 4V to 60V input voltage range,0Vto60Voutputvoltagecapability,andseamlesslow noise transitions between operation regions, the LT8390 is ideal for voltage regulator, battery and supercapacitor charger applications in automotive, industrial, telecom, and even battery-powered systems. The LT8390 provides input or output current monitor and power good flag. Fault protection is also provided to detect output short-circuit condition, during which the LT8390 retries, latches off, or keeps running. 98% Efficient 48W (12V 4A) Miniature Buck-Boost Voltage Regulator APPLICATIONS n 4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT n Synchronous Switching: Up to 98% Efficiency n Proprietary Peak-Buck Peak-Boost Current Mode n Wide VIN Range: 4V to 60V n ±1.5% Output Voltage Accuracy: 1V ≤ VOUT ≤ 60V n ±3% Input or Output Current Accuracy with Monitor n Spread Spectrum Frequency Modulation for Low EMI n High Side PMOS Load Switch Driver n Integrated Bootstrap Diodes n No Top MOSFET Refresh Noise in Buck or Boost n Adjustable and Synchronizable: 150kHz to 650kHz n VOUT Disconnected from VIN During Shutdown n Available in 28-Lead TSSOP with Exposed Pad and 28-Lead QFN (4mm × 5mm) n Automotive, Industrial, Telecom Systems n High Power Battery-Powered System 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. Efficiency vs VIN IOUT = 4A INPUT VOLTAGE (V) 0 10 20 30 40 50 60 86 88 90 92 94 96 98 100 8390 TA01b 165k 0.1µF 4.7µF 4m 0.1µF 6uH 22µF 383k 4.7µF 100k 0.47µF 100k 4.7nF 27k 100k 9.09k 15m 10µF 25V ×2 0.1µF 1µF 1µF 100pF 120µF 16V 120µF 16V EN/UVLO VREF CTRL PGOOD BG2 BST2 TG2 INTVCC LOADEN FB VOUT ISP ISN SYNC/SPRD TEST VIN 4V TO 56V 400kHz 63V ×2 100V ×2 ISMON PGOOD VOUT 12V 4A LSP LSN SW1 SW2 BST1 TG1 BG1 VIN LT8390 LOADTG ISMON SS VC RT GND SSFM OFF SSFM ON IOUT LIMIT 6.7A 8390 TA01a |
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