LT8392 60V Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum FEATURES DESCRIPTION n 4-Switch Single Inductor Architecture Allows V The LT 8392 is a synchronous 4-switch buck-boost DC/ IN Above, Below or Equal to V DC controller that regulates output voltage, input or out- OUT n Up to 98% Efficiency put current from 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: 3V (Need EXTV 4.5V) to 60V current mode control scheme allows adjustable and syn- IN CC n 1.5% Output Voltage Accuracy: 1V V 60V chronizable 150kHz to 650kHz fixed frequency operation, OUT n 4% Input or Output Current Accuracy with Monitor or internal 15% triangle spread spectrum operation for n Spread Spectrum Frequency Modulation for Low EMI low EMI. With 3V to 60V input voltage range, 1V to 60V n Integrated Bootstrap Diodes output voltage capability, and seamless low noise tran- n Adjustable and Synchronizable: 150kHz to 650kHz sitions between operation regions, the LT8392 is ideal n V Disconnected from V During Shutdown for voltage regulator, battery and super-capacitor charger OUT IN n Available in 28-Lead TSSOP with Exposed Pad and applications in automotive, industrial, telecom, and even 28-Lead QFN (4mm 5mm) battery-powered systems. The LT8392 provides input or output current monitor and APPLICATIONS power good flag. Fault protection function detects output short-circuit condition, during which the LT8392 retries, n Automotive, Industrial, Telecom Systems latches off, or keeps running. n High Frequency Battery-Powered System All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION 98% Efficient 96W (12V 8A) Buck-Boost Voltage Regulator V 1m 3H 5m OUT V 12V IN 8A 6V TO 18V 0.1F Efficiency vs V CONTINUOUS 0.1F 22F IN SW1 LSP LSN SW2 10F 120F 470F 470F 3V TO 36V 4 BST1 BST2 4 4 100 TRANSIENT BG1 BG2 98 TG1 TG2 96 V LT8392 V IN OUT 1F 1F EXTV 94 130k CC 10k EN/UVLO ISP 92 V 110k REF 100k 1F 10k TRIM ISN 90 0.47F FB CTRL 88 ISMON 10k I = 8A OUT PGOOD GND 86 TEST 100k 0 4 8 12 16 20 24 28 32 36 40 SYNC/SPRD INPUT VOLTAGE (V) INTV CC 8392 TA01b SS RT V C 4.7F 8392 TA01a 226k 12k 0.1F 200kHz 27nF Rev. 0 1 Document Feedback For more information www.analog.com EFFICIENCY (%)LT8392 ABSOLUTE MAXIMUM RATINGS (Note 1) V , EN/UVLO, V , ISP, ISN ................................... 60V FB, TRIM, SYNC/SPRD, CTRL, PGOOD ....................... 6V IN OUT (ISP-ISN) ......................................................... 1V to 1V Operating Junction Temperature Range (Notes 2, 3) BST1, BST2 ............................................................... 66V LT8392E .............................................40C to 125C SW1, SW2, LSP, LSN .....................................6V to 60V LT8392J ..............................................40C to 150C INTV , (BST1-SW1), (BST2-SW2) ............................. 6V LT8392H .............................................40C to 150C CC (BST1-LSP), (BST1-LSN) ............................................ 6V Storage Temperature Range ...................65C to 150C EXTV ..................................................................... 40V CC PIN CONFIGURATION TOP VIEW TOP VIEW BG1 1 28 BG2 BST1 2 27 BST2 28 27 26 25 24 23 SW1 3 26 SW2 TG1 1 22 TG2 TG1 4 25 TG2 LSP 2 21 V OUT LSP 5 24 V OUT LSN 3 20 EXTV CC LSN 6 23 EXTV CC V 4 19 SYNC/SPRD IN 29 29 V 7 22 SYNC/SPRD GND IN INTV 5 18 RT CC GND 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 TRIM 8 15 SS 9 10 11 12 13 14 TRIM 11 18 SS V 12 17 PGOOD REF CTRL 13 16 ISMON UFD PACKAGE ISP 14 15 ISN 28-LEAD (4mm 5mm) PLASTIC QFN FE PACKAGE = 43C/W, = 3.4C/W JA JC 28-LEAD PLASTIC TSSOP 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 LT8392EFE PBF LT8392EFE TRPBF LT8392FE 28-Lead Plastic TSSOP 40C to 125C LT8392JFE PBF LT8392JFE TRPBF LT8392FE 28-Lead Plastic TSSOP 40C to 150C LT8392HFE PBF LT8392HFE TRPBF LT8392FE 28-Lead Plastic TSSOP 40C to 150C LT8392EUFD PBF LT8392EUFD TRPBF 8392 28-Lead (4mm 5mm) Plastic QFN 40C to 125C LT8392JUFD PBF LT8392JUFD TRPBF 8392 28-Lead (4mm 5mm) Plastic QFN 40C to 150C LT8392HUFD PBF LT8392HUFD TRPBF 8392 28-Lead (4mm 5mm) Plastic QFN 40C to 150C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. Rev. 0 2 For more information www.analog.com V SW1 REF CTRL BST1 ISP BG1 ISN BG2 ISMON BST2 PGOOD SW2