DC2411A Analog Devices

POWER LOSS (W) LTC7150S/LTC7150S-4 20V, 20A Synchronous Step-Down Regulator FEATURES DESCRIPTION n AEC-Q100 Qualified for Automotive Applications The LTC 7150S is a high efficiency monolithic synchronous n Silent Switcher 2 Architecture for Low EMI buck regulator capable of delivering 20A to the load. It uses n V Range: 3.1V to 20V a phase lockable controlled on-time constant frequency, cur- IN n V Range: 0.6V to 5.5V rent mode architecture. PolyPhase operation allows multiple OUT n Differential V Remote Sense LTC7150S regulators to run out-of-phase, which reduces OUT n Adjustable Frequency: 400kHz to 3MHz the amount of input and output capacitors required. The n PolyPhase Operation: Up to 12 Phases operating supply voltage range is from 3.1V to 20V. n Output Tracking and Soft-Start The operating frequency is programmable from 400kHz to n Reference Accuracy: 0.6V 1% Over Temperature 3MHz with an external resistor. The high frequency capability n Current Mode Operation for Excellent Line and Load allows the use of physically smaller inductor and capaci- Transient Response tor sizes. For switching noise sensitive applications, the n Accurate 1.2V Run Pin Threshold LTC7150S can be externally synchronized from 400kHz n Supports Forced Continuous/Discontinuous Modes to 3MHz. The PHMODE pin allows the user control of the n 42-Lead 6mm 5mm 1.3mm BGA Package phase of the outgoing clock signal. The unique constant frequency/controlled on-time architecture is ideal for high step-down ratio applications that operate at high frequencies APPLICATIONS while demanding fast transient response. The LTC7150S n Server Power Applications uses second generation Silent Switcher technology includ- n Distributed Power Systems ing integrated bypass capacitors to deliver a highly efficient n Point of Load Supply for ASIC, FPGA, DSP, P, etc. solution at high frequencies with excellent EMI performance. All registered trademarks and trademarks are the property of their respective owners. PART NUMBER T JMAX LTC7150S 125C LTC7150S-4 150C TYPICAL APPLICATION 12V to 1.2V Application Efficiency and Power Loss IN OUT 100 12 0.25H V V SV = 5V IN OUT IN RUN SW 3.1V TO 20V 1.2V/20A 95 10 PVIN 10k SVIN + FB 22F LTC7150S 100F 90 8 330F 2 2 10k PHMODE 85 6 TRACK/SS V OUT CLKOUT PGOOD INTV MODE/SYNC 80 4 CC SGND 4.7F RT ITH 75 2 70 0 162k 10k 0 4 8 12 16 20 I (A) OUT 1nF 22pF 7150S TA01b 7150S TA01a Rev. B 1 Document Feedback For more information www.analog.com EFFICIENCY (%)LTC7150S/LTC7150S-4 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) PV , SV ................................................. 0.3V to 22V IN IN TOP VIEW RUN Voltage............................................. 0.3V to SV IN 1 2 3 4 5 6 MODE/SYNC, TRACK/SS Voltage .........0.3V to INTV CC PGOOD RT ITH FB V OUT PHMODE A ITH, RT, PGOOD Voltage ........................... 0.3V to 3.6V CLKOUT RUN M/S TRACK/SS SGND INTVCC B PHMODE, CLK Voltage .............................. 0.3V to 3.6V SVIN PVIN SW SW PVIN PVIN V Voltage ........................................... 0.3V to 0.3V C OUT PVIN PVIN SW SW PVIN PVIN FB Voltage ................................................. 0.3V to 3.6V D PGND PGND SW SW PGND PGND Operating Junction Temperature Range E LTC7150SE ........................................ 40C to 125C PGND PGND SW SW PGND PGND F LTC7150SI ......................................... 40C to 125C PGND PGND SW SW PGND PGND G LTC7150S-4J ..................................... 40C to 150C Storage Temperature Range .................. 65C to 150C BGA PACKAGE Maximum Internal Temperature ............................ 125C 42-LEAD (6mm 5mm 1.30mm) = 21C/W JA Peak Reflow Solder Body Temperature .................260C ORDER INFORMATION PART MARKING* PACKAGE MSL TEMPERATURE RANGE PART NUMBER PAD OR BALL FINISH DEVICE FINISH CODE TYPE RATING (SEE NOTE 2) LTC7150SEY PBF 7150S 40C to 125C LTC7150SIY PBF SAC305 (RoHS) e1 BGA 3 LTC7150SJY-4 PBF 7150S4 40C to 150C AUTOMOTIVE PRODUCTS** LTC7150SJY-4 WPBF SAC305 (RoHS) 7150S4 e1 BGA 3 40C to 150C Contact the factory for parts specified with wider operating temperature Recommended LGA and BGA PCB Assembly and Manufacturing ranges. *Pad or ball finish code is per IPC/JEDEC J-STD-609. Procedures This product is not recommended for second side reflow. see BGA LGA and BGA Package and Tray Drawings Assembly and Manufacturing Procedures) This product is moisture sensitive (see BGA Assembly and Manufacturing Procedures). **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