LTC7510

LTC7510 Digital DC/DC Controller with PMBus Interface FEATURES ■ ■ ■ ■ DESCRIPTION The LTC®7510 is a digital DC/DC controller with onboard non-volatile memory and PMBus interface for real time reporting and control of point-of-load (POL) power management. Power supply sequencing, margining, turnon/-off and fault detection are easily programmed via the PMBus interface. The LTC7510 uses a digital control loop which eliminates external compensation components. The controller supports current sharing of multiple ICs; up to four controllers can be synchronized for multiphase operation. The LTC7510 provides superior accuracy through internal calibration to correct current sense error sources upon start-up and programmable temperature compensation provides accurate current sensing over temperature. The LTC7510 is available in a 32-lead (5mm × 5mm) QFN package. , LT LTC and LTM are registered trademarks of Linear Technology Corporation. , All other trademarks are the property of their respective owners. ■ ■ ■ ■ ■ ■ ■ PMBusTM Serial Interface for Programming and Telemetry Digital PID Control Loop Output Voltage Range: 0.7V to VCC – 0.9V Optional Resistor-Based PMBus Address, Output Voltage, Frequency and Current Limit Set 150kHz to 2MHz Switching Frequency DCR Current Sense with Temperature Compensation Adjustable Active Voltage Positioning (AVP) Control On-Chip Non-Volatile Memory (NVM) for Configuration Storage Soft-Start Into Pre-Biased Load Current Sharing 32-Lead (5mm × 5mm) QFN Package APPLICATIONS ■ ■ Digital Power System Management Intelligent Point-of-Load (POL) Power Regulation TYPICAL APPLICATION DC/DC Controller with Read/Write PMBus Digital Interface +12V VDRIVE +5V SDA SMBus INTERFACE SCL SMBALERT_N V D33 LTC7510 POWER MANAGEMENT INTERFACE FAULT OUTPUTS PWRGD OUTEN FAULT1 FAULT2 GND PWM TEMPSEN I SENN I SENP V SENP SADDR_L SADDR_M V SENN V SET F SET V TRIM I MAXSET OPTIONAL 7510 TA01 VINSEN V CC BOOST TG V CC LTC4443-1 V LOGIC IN GND TS BG V D25 VOUT LOAD RTN 7510fa 1 LTC7510 ABSOLUTE MAXIMUM RATINGS (Note 1) PIN CONFIGURATION SMB_ALERT_N TOP VIEW TEMPSEN 24 VD33 23 NC 22 NC 33 21 ISENN 20 ISENP 19 ISH_GND 18 VSENN 17 VSENP 9 10 11 12 13 14 15 16 VSET fSET ISH NC NC SYNC_IN SYNC_OUT VINSEN FAULT1 FAULT2 Supply Voltage (VCC) ................................... –0.3V to 6V VSENP, VSENN ................................................ –0.3V to 3V ISENP, ISENN .................................................–0.3V to VCC OUTEN, SYNC_IN, SYNC_OUT, SMBALERT_N, PWRGD, PWM, SDA, SCL, FAULT1, FAULT2, SADDR_M ...................................... –0.3V to 6V All Other Pins .......................................... –0.3V to 4.25V Differential Voltage VSEN_DIFF (VSENP – VSENN) .................... –0.3V to 2.5V Operating Temperature Range (Note 2).... –40°C to 85°C Junction Temperature ........................................... 125°C Storage Temperature Range................... –65°C to 150°C Write Temperature ....................................... 0°C to 85°C Read Temperature .................................... –40°C to 85°C PWM SCL 32 31 30 29 28 27 26 25 VD25 1 SDA 2 SADDR_L 3 PWRGD 4 SADDR_M 5 OUTEN 6 IMAXSET 7 VTRIM 8 UH PACKAGE 32-LEAD (5mm × 5mm) PLASTIC QFN TJMAX = 125°C, θJA = 34°C/W EXPOSED PAD (PIN 33) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH LTC7510EUH#PBF LTC7510IUH#PBF TAPE AND REEL LTC7510EUH#TRPBF LTC7510IUH#TRPBF PART MARKING* 7510 7510 PACKAGE DESCRIPTION 32-Lead (5mm × 5mm) Plastic QFN 32-Lead (5mm × 5mm) Plastic QFN TEMPERATURE RANGE –40°C to 85°C –40°C to 85°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ VCC NC 7510fa 2 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● LT 0308 REV A • PRINTED IN USA FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2008