LTC3676/LTC3676-1 Power Management Solution for Application Processors FEATURES DESCRIPTION 2 n Quad I C Adjustable High Efficiency Step Down The LTC 3676 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 DDR Power Solution with V and VTTR Reference DC/DC converters for core, memory, I/O, and system TT n Pushbutton ON/OFF Control with System Reset on-chip (SoC) rails and three 300mA LDO regulators for 2 n Independent Enable Pin-Strap or I C Sequencing low noise analog supplies. The LTC3676-1 has a 1.5A n Programmable Autonomous Power-Down Control buck regulator configured to support DDR termination 2 n Dynamic Voltage Scaling plus a VTTR reference output. An I C serial port is used n Power Good and Reset Functions to control regulator enables, power-down sequencing, n Selectable 2.25MHz or 1.12MHz Switching Frequency output voltage levels, dynamic voltage scaling, operating n Always Alive 25mA LDO Regulator modes and status reporting. n 12A Standby Current Regulator start-up is sequenced by connecting outputs to n Low Profile 40-Lead 6mm 6mm QFN and 48-Lead 2 enable pins in the desired order or via the I C port. System Exposed Pad LQFP power-on, power-off and reset functions are controlled by n AEC-Q100 Qualified for Automotive Application 2 pushbutton interface, pin inputs, or I C. APPLICATIONS The LTC3676 supports i.MX, PXA and OMAP processors with eight independent rails at appropriate power levels. n Supports Freescale i.MX6, ARM Cortex, and Other Other features include interface signals such as the VSTB Application Processors pin that toggles between programmed run and standby n Handheld Instruments and Scanners output voltages on up to four rails simultaneously. The n Portable Industrial and Medical Devices device is available in a 40-lead 6mm 6mm QFN and n Automotive Infotainment 48-lead exposed pad LQFP packages. n High End Consumer Devices All registered trademarks and trademarks are the property of their respective owners. n Multi-Rail Systems TYPICAL APPLICATION V IN 2.7V TO 5.5V Start-Up Sequence V V IN 1.5H V RTC ARM WAKE 3V LDO1 SW3 1.38V 25mA 2.5A 1F 47F 5V/DIV V DD(HIGH) LTC3676-1 1.5H V V DD(HIGH) SOC LDO2 SW2 2.97V 1.38V V LDO3 300mA 1F 47F 1.5A 1V/DIV 1.5H V V (V ) LDO3 DDR DDQ V AND V ARM SOC 1.8V LDO3 SW4 1.5V 300mA 1F 47F 2.5A V DDR 1.5H V TT 3V V AND V TT TTR LDO4 SW1 1/2 V DDQ 300mA 1V/DIV 1.5A 1F 47F 6 VTTR (1/2 V ) ENABLES VTTR DDQ PWR ON WAKE WAKE 3676 TA01b 1ms/DIV ON PGOOD 2 2 I C TO PROCESSOR GND 3676 TA01a Rev. G 1 Document Feedback For more information www.analog.comLTC3676/LTC3676-1 ABSOLUTE MAXIMUM RATINGS (Note 1) V , DV , SW1, SW2, SW3, SW4 ............... 0.3V to 6V WAKE, RSTO, PWR ON, IRQ, VTTR, IN DD SW1, SW2, SW3, SW4 VDDQIN ....................................................... 0.3V to 6V (Transient t < 1s, Duty Cycle < 5%) ............... 2V to 7V SDA, SCL ......................................0.3V to DV + 0.3V DD PV , PV , PV , PV , V , Operating Junction Temperature Range IN1 IN2 IN3 IN4 IN L2 V , V .................................. 0.3V to V + 0.3V (Notes 2, 3) ............................................ 40C to 150C IN L3 IN L4 IN LDO1, FB L1, LDO2, FB L2, LDO3, LDO4, FB L4, Storage Temperature Range ......................65 to 150C FB B1, FB B2, FB B3, FB B4, PGOOD, VSTB, EN B1, EN B2, EN B3, EN B4, EN L2, EN L3, EN L4, ON, PIN CONFIGURATION LTC3676 LTC3676-1 TOP VIEW TOP VIEW 40 39 38 37 36 35 34 33 32 31 40 39 38 37 36 35 34 33 32 31 FB L2 1 30 EN L2 FB L2 1 30 EN L2 V 2 29 ON IN L2 V 2 29 ON IN L2 LDO2 3 28 LDO1 LDO2 3 28 LDO1 LDO3 4 27 V IN LDO3 4 27 V IN V 5 26 FB L1 IN L3 V 5 26 FB L1 41 IN L3 41 GND LDO4 6 25 FB B2 GND LDO4 6 25 FB B2 V 7 24 FB B1 IN L4 V 7 24 FB B1 IN L4 VDDQIN 8 23 FB B4 FB L4 8 23 FB B4 VTTR 9 22 FB B3 EN L4 9 22 FB B3 EN L3 10 21 PWR ON EN L3 10 21 PWR ON 11 12 13 14 15 16 17 18 19 20 11 12 13 14 15 16 17 18 19 20 UJ PACKAGE UJ PACKAGE 40-LEAD (6mm 6mm) PLASTIC QFN 40-LEAD (6mm 6mm) PLASTIC QFN T = 150C, = 33C/W, = 2C/W JMAX JA JC T = 150C, = 33C/W, = 2C/W JMAX JA JC EXPOSED PAD (PIN 41) IS GND, MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 41) IS GND, MUST BE SOLDERED TO PCB LTC3676 LTC3676-1 TOP VIEW TOP VIEW NC 1 36 NC NC 1 36 NC FB L2 2 35 EN L2 FB L2 2 35 EN L2 V 3 34 ON V 3 34 ON IN L2 IN L2 LDO2 4 33 LDO1 LDO2 4 33 LDO1 LDO3 5 32 V LDO3 5 32 V IN IN 49 49 V 6 31 FB L1 V 6 31 FB L1 IN L3 IN L3 LD04 7 GND 30 FB B2 LD04 7 GND 30 FB B2 V 8 29 FB B1 V 8 29 FB B1 IN L4 IN L4 FB L4 9 28 FB B4 VDDQIN 9 28 FB B4 EN L4 10 27 FB B3 VTTR 10 27 FB B3 EN L3 11 26 PWR ON EN L3 11 26 PWR ON NC 12 25 NC NC 12 25 NC LXE PACKAGE LXE PACKAGE 48-LEAD (7mm 7mm) PLASTIC LQFP 48-LEAD (7mm 7mm) PLASTIC LQFP T = 150C, = 19C/W, = 3C/W T = 150C, = 19C/W, = 3C/W JMAX JA JC JMAX JA JC EXPOSED PAD (PIN 49) IS GND, MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 49) IS GND, MUST BE SOLDERED TO PCB Rev. G 2 For more information www.analog.com SW4 SW1 DV PGOOD NC 13 48 NC DD SW4 14 47 SW1 SDA RSTO 46 PGOOD DV 15 DD SCL EN B1 45 RST0 SDA 16 44 EN B1 SCL 17 PV PV IN4 IN1 PV 18 43 PV IN1 IN4 PV PV PV 19 42 PV IN3 IN2 IN3 IN2 41 EN B2 EN B4 20 EN B4 EN B2 40 WAKE EN B3 21 EN B3 WAKE 39 IRQ VSTB 22 SW3 23 38 SW2 VSTB IRQ NC 24 37 NC SW3 SW2 SW4 SW1 NC 13 48 NC DV PGOOD DD SW4 14 47 SW1 SDA RSTO 46 PGOOD DV 15 DD 45 RST0 SDA 16 SCL EN B1 SCL 17 44 EN B1 PV PV IN4 IN1 PV 18 43 PV IN1 IN4 PV 19 42 PV IN3 IN2 PV PV IN3 IN2 41 EN B2 EN B4 20 EN B4 EN B2 40 WAKE EN B3 21 VSTB 22 39 IRQ EN B3 WAKE SW3 23 38 SW2 VSTB IRQ NC 24 37 NC SW3 SW2