AIC1569

AIC1569A 5-bit DAC, Synchronous PWM Power Regulator FEATURES Compatible with HIP6004. Simple Voltage-Mode PWM Control. Dual N-Channel MOSFET Synchronous Drive. Fast Transient Response. ±1% 5-Bit Digital-to-Analog Output Voltage. Adjustable Current Limit Without External Sense Resistor. Full 0% to 100% Duty Ratio. 200KHz Free-Running Oscillator, Programmable up to 350KHz. Power-Good Output Voltage Monitor. DESCRIPTION The AIC1569A is a high power, high efficiency switching regulator controller optimized for high performance microprocessor applications. It is designed to drive dual N-channel MOSFETs in a standard synchronous buck topology. Featuring a digitally programmable switching regulator, the AIC1569A includes monitoring and protection capabilities in addition to all the essential synchronous PWM control functions. The internal 5-bit Digital-to-Analog Converter (DAC) adjusts the output voltage from 2.0V to 3.5V in 0.1V increments and 1.3V to 2.0V in 0.05V increments. The precision reference and voltage-mode voltage shifts. The internal oscillator of the AIC1569A free-runs at 200KHz and can be adjusted up to 350KHz. The resulting PWM duty ratio ranges from 0% to 100%. The error amplifier features an 11MHz bandwidth and 6V/µS slew rate, which enables high converter bandwidth for fast transient response. The AIC1569A provides adjustable over current and short circuit protections. It senses the output current across the on resistance of the upper Nchannel MOSFET without an external low value sense resistor. It also monitors the output voltage with a window comparator and issues a power good signal when the output is within 10% of the rated output voltage. control can provide output regulation within ±1% over temperature and line APPLICATIONS Power Supply for Pentium® II, Power® and Alpha® Microprocessors. High-Power 5V to 3.xV DC/DC Regulators. Low-Voltage Distributed Power Supplies. Analog Integrations Corporation DS-1569A-00 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw 1 AIC1569A ORDERING INFORMATION AIC1569A XX PACKAGE TYPE S: SMALL OUTLINE TEMPERATURE RANGE C: 0°C~70°C ORDER NUMBER PIN CONFIGURATION TOP VIEW VSEN 1 OCSET 2 SS 3 VID0 4 VID1 5 VID2 6 VID3 7 VID4 8 COMP 9 FB 10 20 RT 19 OVP 18 VCC 17 LGATE 16 PGND 15 BOOT 14 UGATE 13 PHASE 12 PGOOD 11 GND AIC1569ACS (PLASTIC SO) TYPICAL APPLICATION CIRCUIT C9 1000pF R2 2.2K C2 C8 0.1µF VID0 VID1 VID2 VID3 VID4 VSEN OCSET SS VID0 VID1 VID2 VID3 VID4 COMP FB C7 33pF R6 90.9K C6 1000pF R7 1.2M R3 R5 3.01K 47K C5 0.1µF  RT OVP VCC LGATE PGND BOOT UGATE PHASE PGOOD R1 47Ω C1 1µF RFP45N03L + 0.1µF 12V L1 1µH C3 1000µF x 3 L2 3µH D1 M2 R4 15K NDP603AL 1N5820 + VOUT 5V M1 GND AIC1569A C4 1000µF x 8 DC/DC Converter for Pentium II VCORE 2 AIC1569A ABSOLUTE MAXIMUM RATINGS Supply Voltage, VCC ....…...........................….……....………….......................................... 15V Boot Voltage, VBOOT ………........................………..…………............................................. 15V Input, Output, or I/O Voltage .....................…………...…...……....... GND - 0.3V to VCC+0.3V ESD Classification ..............................……………….…................……......................... Class 2 Recommended Operating Conditions Supply Voltage, VCC ....…............................…………..……...................................... 12V±10% Ambient Temperature Range .…............................…....…………….….................. 0°C ~ 70°C Junction Temperature Range ....…...........……………..........…............................. 0°C ~100°C Thermal Information Thermal Resistance, θJA (Typical, Note 1) SOIC Package...............................………….……..…………………….........…. 100°C /W SOIC Package (with 3 in2 of Copper) ……………..………………………......….. 90°C /W Maximum Junction Temperature (Plastic Package) …..……………….....…….............. 150°C Maximum Storage Temperature Range …………………………...........…......... -65°C ~150°C Maximum Lead Temperature (Soldering 10 sec) ……….…………………......…......... Note 1: θJA 300°C is measured with the component mounted on an evaluation PC board in free air. TEST CIRCUIT Refer to TYPICAL APPLICATION CIRCUIT. ELECTRICAL CHARACTERISTICS (VCC= 12V, Ta=25°C, unless otherwise specified.) PARAMETER VCC Supply Current Nominal Supply Power-On Reset VCC Threshold Rising VOCSET Threshold Oscillator Free Running Frequency Total Variation Ramp Amplitude RT Open 6KΩ