Solutions for Desktop Computers InfoCard 18 ICs for Low Voltage Microprocessor, Logic and Bus Termination Linear Regulation Solutions Featuring Fast Transient Response Switching Regulators for Up to 30A at > 90% Efficiency GTL+ Termination Solutions Reset Generation for PCI Applications 15kV ESD Tolerant RS232 Interface UltraFast TM Regulators Minimize Bulk Output Capacitors Single and Dual Fast Transient Response Pecision Regulators RC 1k CC, 100pF VOUT LATCH LT1573 + CTIME VOUT = 1.265V (1 + R1/R2) FOR T < 45C, COUT1 = 24 x 1F Y5V CERAMIC FOR T > 45C, COUT1 = 24 x 1F X7R CERAMIC PLACE COUT1 IN THE PROCESSOR SOCKET CAVITY + COMP FB SHDN GND VIN RD 24 RB 50 DRIVE CIN 100F TANT COUT1 1F + CER x 24 + + VIN 0 3v 6. QOUT MOTOROLA D45H11 VOUT R1 1.6k COUT2 220F TANT 33 LOAD R2 1k GND 1573 F01 Single (LT1573, LT1575) and Dual (LT1577) Regulators Use External MOSFET (LT1575, LT1577) for High Efficiency or PNP (LT1573) for Lower Cost Reduces Cost by Eliminating Aluminum and Tantalum Output Capacitors* Short-Circuit Protection Without Current Sense Resistor Guaranteed 1% Output Voltage Accuracy (Over Temperature) Extremely Low Dropout Voltage Possible: 0.1V at 10A *LT1573 requires only one 220F tantalum capcitor Switching Regulator for Pentium (R) II Processor Includes Digital Control LTC (R)1553 High Efficiency Switching Regulator Controller Digitally Programmable 1.8V to 3.5V Fixed Output Voltage Provides All Features Required by the Intel Pentium(R) Pro Processor Specifications Flags for Power Good, Over-Temperature and Over-Voltage Fault Output Current Exceeds 14A from a 5V or 12V Supply All N-Channel External MOSFETs Excellent Output Regulation: 1% Over Line, Load and Temperature Variations High Efficiency: Over 95% Possible Adjustable Current Limit Without External Sense Resistors Fast Transient Response Available in 20-Pin SSOP VIN 5V PVCC 12V + 0.1F 5.6k 5.6k 0.1F 1.6k 5.6k PWRGD VCC IMAX OT 5 G1 LTC1553 OUTEN COMP SS C1 100pF RC 33k CC 1000pF CSS 0.01F G2 SGND GND Q1* IFB VID0 TO VID4 CIN 1200F x3 10F PVCC FAULT PENTIUM PRO SYSTEM + + 10F Q2* LO 1.5H 18A COUT 1500F x4 + vOUT 1.8V TO 3.5V 14A SENSE 0.1F *SILICONIX SUD50N03-10 1553 F01 , LTC and LT are registered trademarks of Linear Technology Corporation. UltraFast is a trademark of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation. Rev F 0997 Linear Technology Corporation * 1630 McCarthy Blvd. * Milpitas, CA 95035-7417 * (408) 432-1900 * www.linear-tech.com * Literature Only: 1-800-4-LINEAR Solutions for Desktop Computers InfoCard 18 High Power, High Efficiency Switching Regulator Contoller Solution LTC1430 Drives Large N-Channel MOSFETs for High Output Currents 5V High Power 5V to 3.xV Switching Controller: Can Exceed 10A Output All N-Channel External MOSFETs Excellent Output Regulation: 1% Over Line and Load Constant Frequency Operation--Small L High Efficiency: Over 95% Possible Fast Transient Response Adjustable or Fixed 3.3V Output Available in 8- and 16-Lead DIP and Narrow SO Packages + PVCC2 + 0.1F 2.4H/15A 1k LTC1430 IFB NC SHDN + G2 FREQSET SHUTDOWN Q2 GND SENSE+ RC 7.5k CC 4700pF 3.3V 10A COUT 330F x6 PGND COMP C1 220pF 0.1F IMAX CIN 220F x4 Q1 G1 SS 0.01F 0.1F 16k PVCC1 VCC 4.7F + 1N4148 1F 100 SENSE IC18 1430-1 FB - NC Q1, Q2: IR IRL3103 CIN: AVX-TPSE227M010R0100 COUT: AVX-TPSE337M006R0100 High Efficiency 10V-18V to 3.3V at 50A Conversion for Multiple High Performance Processors LT1339 Handles High Input Voltage and Large N-Channel MOSFETs High Voltage: Operation Up to 60V Max High Current: Dual N-Channel Synchronous Drive Handles Up to 10,000pF Gate Capacitance Programmable Average Load Current Limiting Programmable Fixed Frequency Synchronizable Current Mode Operation Up to 150kHz Undervoltage Lockout with Hysteresis Programmable Start Inhibit for Power Supply Sequencing and Protection Adaptive Nonoverlapping Gate Drive Prevents Shoot-Through 10V TO 16V 1000F 16V x2 OS-CON + 1N914 100k 13 2 1F 15k 4 3 1500pF 5 2200pF 7 4.7k 10 0.1F 17 20 BOOST 12VIN RUN TG 5VREF TS SLOPE BG CT 1F IAVG VC SENSE - 12 1 8 3.3V 2200F 50A 6.3V OS-CON 9 SYNC SGND PGND 2200pF 10A 20A 50A IRL3103D2 x4 1N5817 11 ILIMIT 0.01 0.005 0.002 + 16 SENSE + FB RSENSE 0.002 18 LT1339 VREF IRL3803 19 10H 50A RSENSE RSELECT 1.66k 1k RSELECT 3K 1.66K 1.25K 450 5 15 VOUT 5V 3.3V 2.8V 1.8V 1.3V IC18 1339 GTL+ Bus Regulator Has Fast Response and Tight Regulation Best Solution for Intel 3.3V Pentium Pro Processor GTL+ Supply Fast Transient Response + Guaranteed Dropout Voltage Load Regulation: 0.05% Typ Trimmed Current Limit On-Chip Thermal Limiting LT1585A-1.5 VIN VOUT VTT = 1.5V 3A C7 TO C12 1F GND C1, C2 100F + C3 TO C6 100F R1 75 R2 150 R5 100 VREF R7 100 R8 100 R6 100 VREF C13 0.1F R4 150 TX C14 0.1F RX RX A SINGLE LT1585-1.5 5A REGULATOR MAY BE USED IN APPLICATIONS WITH A CENTRALIZED REGULATOR AND MINIMAL VTT DISTRIBUTION DROPS R3 75 Q1 Q2 TX IC18 1587 2 Solutions for Desktop Computers InfoCard 18 Dual High Performance Regulator for Microprocessor Core and I/O Supplies LT1577 Dual Regulator Controller Handles High Current Loads 12V 5V UltraFast Transient Response Eliminates Tantalum and Electrolytic Output Capacitors 1% Reference for Each Regulator Typical Load Regulation: 1mV High Side Current Sense Limit Independent Enables for Proper Sequencing + 3.3V I/O SUPPLY + ENABLE 3.3 IPOSA IPOSB INEGA INEGB GATEA GATEB LT1577 SHDNA SHDNB OUTA ENABLE 2.5 2.5V CORE SUPPLY + OUTB 0 33 COMPA COMPB 3v 6. IC18 1577 Triple Supply Monitor for PCI Applications LTC1536 Monitors Multiple Supply Voltages with High Accuracy Monitors 5V, 3.3V and Adjustable Inputs Simultaneously Guaranteed Threshold Accuracy: 0.5% Low Supply Current: 20A (LTC1326) 65A (LTC1536) Internal Reset Time Delay: 200ms 3.3V Manual Pushbutton Reset Input 5V Active Low and Active High Reset Outputs ADJUSTABLE REGULATOR Active Low Soft Reset Output FEEDBACK PIN Power Supply Glitch Immunity Guaranteed Reset for VCC3 1V Meets PCI tFAIL Timing Specifications (LTC1536) 8-Pin SO and MSOP Packages RST Output Voltage vs Supply Voltage 3.5 LTC1326 OR LTC1536 1 2 3 4 VCC3 PBR VCC5 SRST VCCA RST GND RST 8 7 6 VCC5 = VCCA = 5V 4.7k PU FROM RST TO VCC3 3.0 SOFT RESET SYSTEM RESET 5 PUSHBUTTON RESET IC18 1536-1 HRST OUTPUT VOLTAGE (V) 2.5 2.0 1.5 1.0 0.5 0 0 0.5 1.0 1.5 2.0 VCC3 (V) 2.5 3.0 3.5 IC18 1536-2 Low Power, 15kV ESD Protected, RS232 Transceivers 15kV ESD Human Body Model 15kV IEC-1000-4-2 Air Gap Test 8kV IEC-1000-4-2 Contact Test DRIVERS RECEIVERS SUPPLY REQUIRED IQ (TYP) SHUTDOWN LT1133A 3 5 5V 15mA No PC/DTE Interface No LT1137A 3 5 5V 12mA Yes Flow-Through Architecture Yes LT1039A 3 3 5V, 12V 1mA Yes One Receiver Active in Shutdown No LT1039A-16 3 3 5V, 12V 1mA No Rugged MC145406 Replacement No LT1141A 3 5 5V, 12V 8mA, 2mA Yes PC/DTE Interface Yes LT1180A 2 2 5V 9mA Yes Ideal for Surface Mount No PART COMMENTS DRIVER DISABLE 3 Solutions for Desktop Computers InfoCard 18 PROCESSOR TYPE CORE VOLTAGE CORE CURRENT REGULATOR I/O VOLTAGE I/O CURRENT REGULATOR 2.8V + 100mV/- 60mV 14.2A LTC1553 (S) or LTC1430 (S) 3.3V 2A LT1587 LT1575 LT1573 Pentium(R) Pro Processor 166MHz/180MHz/200MHz 3.3V 5% 10A to 14A LTC1553 (S) or LTC1430 (S) None GTL+ Terminator 1.5V 2% 5.7A None Pentium(R) Processor with MMXTM Technology 166MHz/200MHz/233MHz 2.8V 100mV 6.5A LT1585-1.5 (L) x2 LT1585A-1.5 (L) LT1575 (L) LTC1430 (S) LT1584 (L) LT1580 (L) LT1575 (L) 0.65A LT1587 Pentium Processor 133MHz/166MHz/200MHz 3.5V 2.9% 4.5A AMD K6TM with MMX 166MHz/200MHz/233MHz 2.9V 5% 3.2V 100mV 7.5A 9.5A 3.3V 5% 0.52A LT1587 2.38V to 3.60V 5% 4A 3.3V 5% 1A to 3A LT1587 Pentium(R) II Processor 233MHz/266MHz AMD K5 LTC1430 (S) LT1585 (L) LT1575 (L) LTC1553 (S) or LTC1430 (S) LTC1553 (S) LTC1430 (S) LT1585 (L) LT1575 (L) LTC1430 (S) LT1581 (L) LT1575 (L) 3.3V 5% Same as Core Cyrix 6x86MXTM 2.9V 100mV 6.3A to 9.5A 3.3V 5% 0.1A 133MHz/150MHz/166MHz 188MHz/200MHz/225MHz 233MHz Cyrix 6x86 3.15V to 3.6V 4.7A to 6.6A LTC1430 (S) Same as 80MHz/100MHz/110MHz LT1584 (L) Core 120MHz/133MHz LT1575 (L) Cyrix 6x86L 2.8V 6% 4.7A to 6A LTC1430 (S) 3.3V 4.5% 0.1A 100MHz/110MHz/120MHz LT1584 (L) 133MHz/150MHz LT1575 (L) IBM PowerPCTM 740/750 2.6V 100mV 3A LT1587 (L) 3.3V 5% 0.25A 200MHz/233MHz/266MHz LT1573 (L) IBM PowerPC 604e 1.9V 100mV 5.9A LT1584 (L) 3.3V 5% 0.35A 250MHz/300MHz/350MHz LT1575 (L) IBM PowerPC 604e 2.5V 5% 5.3A LTC1430 (S) 3.3V 5% 0.5A 180MHz/200MHz/225MHz LT1584 (L) 233MHz LT1580 (L) IBM PowerPC 603e 2.5V 5% 2.4A LT1587 (L) 3.3V 5% 0.2A 200MHz/225MHz/233MHz LT1573 (L) 240MHz/250MHz L = Linear Regulator, S = Switching Regulator, Penitum is a registered trademark of Intel Corp, MMX is a trademark of Intel Corp, K6 is a trademark of Advanced Micro Devices Inc, 6x86MX is a trademark of Cyrix Corp, PowerPC is a trademark of IBM Corp. 7A and 10A Very Low Dropout Regulators for Low Voltage Microprocessors LT158x Regulates from 3.3V to 2.5V with 1% Accuracy Dropout Power Guaranteed Test Points 0.9 Low Dropout: Tested Limits Fast Transient Response Remote Sense 1mV Load Regulation Fixed 2.5V Output or Adjustable Output No Supply Sequencing Problems in Dual Supply Mode LT1580: 3.3V AT 7A LT1581: 3.3V AT 10A + 5V 0.2A LT1580: 2.5V AT 7A LT1581: 2.5V AT 10A POWER 330F OS-CON OUTPUT + LT158x-2.5 100F TANT AVX TPS x7 CONTROL SENSE + 10F TANT GND ADJ + 0.1F IC18 1580-1 LT1580-2.5 LT1581-2.5 TJ = 25C 0.8 MINIMUM POWER VOLTAGE (V) (VPOWER - VOUT) 0.7 0.6 DATA SHEET LIMITS 0.5 0.4 0.3 0.2 0.1 0 0 1 2 3 4 5 6 7 8 OUTPUT CURRENT (A) 9 10 IC18 1580-2 Linear Technology Corporation * 1630 McCarthy Blvd. * Milpitas, CA 95035-7417 * (408) 432-1900 * www.linear-tech.com * Literature Only: 1-800-4-LINEAR (c)1994 LT/GP 0997 10K