LT8390 60V Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum FEATURES DESCRIPTION n 4-Switch Single Inductor Architecture Allows V The LT 8390 is a synchronous 4-switch buck-boost DC/DC IN Above, Below or Equal to V controller that regulates output voltage, input or output OUT 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 V Range: 4V to 60V current mode control scheme allows adjustable and syn- IN n 1.5% Output Voltage Accuracy: 1V V 60V chronizable 150kHz to 650kHz fixed frequency operation, OUT 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 V Disconnected from V During Shutdown and even battery-powered systems. OUT IN 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 n AEC-Q100 Qualified for Automotive Applications output short-circuit condition, during which the LT8390 retries, latches off, or keeps running. APPLICATIONS All registered trademarks and trademarks are the property of their respective owners. n Automotive, Industrial, Telecom Systems n High Power Battery-Powered System TYPICAL APPLICATION 98% Efficient 48W (12V 4A) Miniature Buck-Boost Voltage Regulator 6uH V 4m 15m OUT V IN 12V 4V TO 56V 4A 22F 10F 4.7F 0.1F 0.1F 120F 120F SW1 LSP LSN SW2 63V 100V 25V 16V 16V 2 2 BST1 BST2 2 Efficiency vs V IN BG1 BG2 100 GND TG1 TG2 98 V LT8390 V IN OUT 96 1F 1F 383k EN/UVLO ISP 94 100k LOADTG ISN 165k 92 TEST FB SSFM OFF 9.09k ISMON ISMON SYNC/SPRD 90 I LIMIT 6.7A OUT CTRL INTV SSFM ON CC 88 4.7F I = 4A OUT 100k LOADEN 86 V PGOOD PGOOD REF 0 10 20 30 40 50 60 SS V RT 0.47F C INPUT VOLTAGE (V) 8390 TA01a 8390 TA01b 100k 0.1F 100pF 400kHz 27k 4.7nF Rev. C 1 Document Feedback For more information www.analog.com EFFICIENCY (%)LT8390 ABSOLUTE MAXIMUM RATINGS (Note 1) V , EN/UVLO, V , ISP, ISN ....................................60V FB, LOADEN, SYNC/SPRD, CTRL, PGOOD ...................6V IN OUT (ISP-ISN) ..........................................................1V to 1V Operating Junction Temperature Range (Notes 2, 3) BST1, BST2 ................................................................66V LT8390E ............................................. 40C to 125C SW1, SW2, LSP, LSN ..................................... 6V to 60V LT8390I .............................................. 40C to 125C INTV , (BST1-SW1), (BST2-SW2) ..............................6V LT8390J, LT8390H ............................. 40C to 150C CC (BST1-LSP), (BST1-LSN) .............................................6V Storage Temperature Range ................... 65C to 150C PIN CONFIGURATION TOP VIEW TOP VIEW BG1 1 28 BG2 BST1 2 27 BST2 SW1 3 26 SW2 28 27 26 25 24 23 TG1 4 25 TG2 TG1 1 22 TG2 LSP 5 24 V LSP 2 21 V OUT OUT LSN 3 20 LOADTG LSN 6 23 LOADTG 29 V 4 19 SYNC/SPRD V 7 22 SYNC/SPRD IN 29 IN GND GND INTV 5 18 RT CC INTV 8 21 RT CC EN/UVLO 6 17 V C EN/UVLO 9 20 V C TEST 7 16 FB TEST 10 19 FB LOADEN 8 15 SS LOADEN 11 18 SS 9 10 11 12 13 14 V 12 17 PGOOD REF CTRL 13 16 ISMON ISP 14 15 ISN UFD PACKAGE 28-LEAD (4mm 5mm) PLASTIC QFN FE PACKAGE = 43C/W, = 3.4C/W 28-LEAD PLASTIC TSSOP JA JC EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB = 30C/W, = 5C/W JA JC EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT8390EFE PBF LT8390EFE TRPBF LT8390FE 28-Lead Plastic TSSOP 40C to 125C LT8390IFE PBF LT8390IFE TRPBF LT8390FE 28-Lead Plastic TSSOP 40C to 125C LT8390JFE PBF LT8390JFE TRPBF LT8390FE 28-Lead Plastic TSSOP 40C to 150C LT8390HFE PBF LT8390HFE TRPBF LT8390FE 28-Lead Plastic TSSOP 40C to 150C LT8390EUFD PBF LT8390EUFD TRPBF 8390 28-Lead (4mm 5mm) Plastic QFN 40C to 125C LT8390IUFD PBF LT8390IUFD TRPBF 8390 28-Lead (4mm 5mm) Plastic QFN 40C to 125C LT8390JUFD PBF LT8390JUFD TRPBF 8390 28-Lead (4mm 5mm) Plastic QFN 40C to 150C LT8390HUFD PBF LT8390HUFD TRPBF 8390 28-Lead (4mm 5mm) Plastic QFN 40C to 150C Rev. C 2 For more information www.analog.com V SW1 REF CTRL BST1 ISP BG1 ISN BG2 ISMON BST2 PGOOD SW2