LT3383 Multioutput Power Management Solution with Four Buck Switching and Three LDO Linear Regulators FEATURES DESCRIPTION n Quad Adjustable High Efficiency Step-Down The LT 3383 is a complete power management solution DC/DC Converters: 2.5A, 2.5A, 1.5A, 1.5A for advanced portable application processor-based sys- n Three 300mA LDO Regulators (Two Adjustable) tems. The device contains four synchronous step-down n Independent Enable Pin-Strap Sequencing DC/DC converters for core, memory, I/O, and system on- n Power Good chip (SoC) rails and three 300mA LDO regulators for low n 2.25MHz Switching Frequency noise analog supplies. n 12A Standby Current Regulator start-up is sequenced by connecting outputs to n 150C T Operation (LT3383H) J enable pins in the desired order. A master power-on pin n Side Wettable 40-Lead 6mm 6mm QFN Package is provided to initiate pin-strapped power-on sequences. n AEC-Q100 Qualified for Automotive Applications A status pin is available to indicate regulator undervoltages. If an overtemperature or low supply fault is detected all APPLICATIONS regulators are disabled during the fault condition. n Automotive The device is available in a 40-lead 6mm 6mm QFN with n Industrial wettable flanks for optical inspection. n Communications n All registered trademarks and trademarks are the property of their respective owners. General Purpose Multichannel Power Supplies TYPICAL APPLICATION 1H Start-Up Sequence SW1 2.5A 2.7V TO 5.5V V IN 1.7V TO V V IN IN L1 PWR ON FB B1 47F 300mA LDO1 5V/DIV LDO1 LT3383 LDO2 1F FB L1 1H 1V/DIV 2.5A SW2 BUCK1 AND BUCK2 BUCK3 FB B2 BUCK4 47F 1.7V TO V V 1V/DIV IN IN L2 300mA LDO2 3383 TA01b 1H 1ms/DIV SW3 1.5A 1F FB L2 FB B3 47F 1.8V TO V V IN IN L3 1.8V 1H LDO3 300mA 1.5A SW4 1F FB B4 47F 7 ENABLES PWR ON PGOOD 3383 TA01a Rev. B 1 Document Feedback For more information www.analog.comLT3383 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW V ............................................................... 0.3V to 6V IN PV , PV , PV , PV .........V 0.3V to V + 0.3V IN1 IN2 IN3 IN4 IN IN 40 39 38 37 36 35 34 33 32 31 V , V , V ...................... 0.3V to V + 0.3V IN L1 IN L2 IN L3 IN FB L2 1 30 EN L2 LDO1, FB L1, LDO2, FB L2, LDO3, FB B1, FB B2, V 2 29 GND IN L2 FB B3, FB B4, PGOOD, EN B1, EN B2, EN B3, EN B4, LDO2 3 28 GND LDO3 4 27 V EN L1, EN L2, EN L3, PWR ON ................. 0.3V to 6V IN V 5 26 GND IN L3 41 Operating Junction Temperature Range GND LDO1 6 25 FB B3 (Notes 2, 3) ............................................ 40C to 150C V 7 24 FB B4 IN L1 Storage Temperature Range .................. 65C to 150C FB L1 8 23 FB B1 EN L1 9 22 FB B2 EN L3 10 21 PWR ON 11 12 13 14 15 16 17 18 19 20 UJM PACKAGE 40-LEAD (6mm 6mm) WETTABLE PLASTIC QFN T = 150C, = 33C/W, = 2C/W JMAX JA JC EXPOSED PAD (PIN 41) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3383EUJM PBF LT3383EUJM TRPBF LT3383UJM 40-Lead (6mm 6mm) Plastic QFN 40C to 125C LT3383IUJM PBF LT3383IUJM TRPBF LT3383UJM 40-Lead (6mm 6mm) Plastic QFN 40C to 125C LT3383HUJM PBF LT3383HUJM TRPBF LT3383UJM 40-Lead (6mm 6mm) Plastic QFN 40C to 150C AUTOMOTIVE PRODUCTS** LT3383IUJM WPBF LT3383IUJM WTRPBF LT3383UJM 40-Lead (6mm 6mm) Plastic QFN 40C to 125C LT3383UJM 40-Lead (6mm 6mm) Plastic QFN 40C to 150C LT3383HUJM WPBF LT3383HUJM WTRPBF 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. **Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These models are designated with a W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for thesemodels. Rev. B 2 For more information www.analog.com SW1 SW4 GND PGOOD GND GND GND EN B4 PV PV IN1 IN4 PV PV IN2 IN3 EN B1 EN B3 EN B2 GND GND GND SW2 SW3