HIP6019

Data Sheet No. PD94142 IRU3007 5-BIT PROGRAMMABLE SYNCHRONOUS BUCK, NON-SYNCHRONOUS, ADJUSTABLE LDO AND 200mA ON-BOARD LDO FEATURES DESCRIPTION Provides Single Chip Solution for Vcore, GTL+, Clock Supply & 3.3V Switcher On-Board Second switcher provides simple control for the on-board 3.3V supply 200mA On-Board LDO Regulator Designed to meet Intel VRM 8.2 and 8.3 specification for Pentium II™ On-Board DAC programs the output voltage from 1.3V to 3.5V Linear Regulator Controller On-Board for 1.5V GTL+ supply Loss-less Short Circuit Protection Synchronous Operation allows maximum efficiency Patented architecture allows fixed frequency operation as well as 100% duty cycle during dynamic load Minimum Part Count Soft-Start High current totem pole drivers for directly driving the external Power MOSFETs Power Good function monitors all outputs Over-Voltage Protection circuitry protects the switcher outputs and generates a fault output Thermal Shutdown The IRU3007 controller IC is specifically designed to meet Intel specification for Pentium II™ microprocessor applications as well as the next generation of P6 family processors. The IRU3007 provides a single chip controller IC for the Vcore, LDO controller for GTL+ and an internal 200mA regulator for clock supply which are required for the Pentium II applications. It also contains a switching controller to convert 5V to 3.3V regulator for on-board applications that uses either AT type power supply or is desired not to rely on the ATX power supply’s 3.3V output. These devices feature a patented topology that in combination with a few external components, as shown in the typical application circuit, will provide in excess of 14A of output current for an on-board DC/DC converter while automatically providing the right output voltage via the 5-bit internal DAC. The IRU3007 also features, loss-less current sensing for both switchers by using the RDS(on) of the high-side power MOSFET as the sensing resistor, internal current limiting for the clock supply, a Power Good window comparator that switches its open collector output low when any one of the outputs is outside of a pre-programmed window. Other features of the device are: Under-Voltage Lockout for both 5V and 12V supplies, an external programmable softstart function, programming the oscillator frequency via an external resistor, Over-Voltage Protection (OVP) circuitry for both switcher outputs and an internal thermal shutdown. Note: Pentium II and Pentium Pro are trademarks of Intel Corp. APPLICATIONS Total Power Solution for Pentium II processor application TYPICAL APPLICATION 5V SWITCHER2 CONTROL VO U T 2 SWITCHER1 CONTROL VO U T1 IRU3007 VO U T 3 LINEAR CONTROL LINEAR REGULATOR VO U T4 Figure 1 - Typical application of IRU3007. PACKAGE ORDER INFORMATION TA (°C) 0 To 70 Rev. 2.1 08/20/02 DEVICE IRU3007CW www.irf.com PACKAGE 28-pin Plastic SOIC WB (W) 1 IRU3007 ABSOLUTE MAXIMUM RATINGS V5 Supply Voltage .................................................... V12 Supply Voltage .................................................. Storage Temperature Range ...................................... Operating Junction Temperature Range ..................... 7V 20V -65°C To 150°C 0°C To 125°C PACKAGE INFORMATION 28-PIN WIDE BODY PLASTIC SOIC (W) TOP VIEW UGate2 1 Phase2 2 VID4 3 VID3 4 VID2 5 VID1 6 VID0 7 PGood 8 OCSet2 9 Fb2 10 V5 11 SS 12 Fault / Rt 13 Fb4 14 28 V12 27 UGate1 26 Phase1 25 LGate1 24 PGnd 23 OCSet1 22 VSEN1 21 Fb1 20 NC 19 Fb3 18 Gate3 17 Gnd 16 VOUT4 15 VSEN2 uJA =808C/W ELECTRICAL SPECIFICATIONS Unless otherwise specified, these specifications apply over V12=12V, V5=5V and TA=0 to 70°C. Typical values refer to TA=25°C. Low duty cycle pulse testing is used which keeps junction and case temperatures equal to the ambient temperature. PARAMETER Supply UVLO Section UVLO Threshold-12V UVLO Hysteresis-12V UVLO Threshold-5V UVLO Hysteresis-5V Supply Current Operating Supply Current SYM TEST CONDITION Supply Ramping Up Supply Ramping Up MIN TYP 10 0.4 4.3 0.3 6 30 MAX UNITS V V V V mA V12 V5 Switching Controllers; Vcore (V OUT1) and I/O (V OUT2) VID Section (Vcore only) DAC Output Voltage (Note 1) DAC Output Line Regulation DAC Output Temp Variation VID Input LO VID Input HI VID Input Internal Pull-Up Resistor to V5 VFB2 Voltage Oscillator Section (Internal) Osc Frequency Rt=Open 0.99Vs Vs 0.1 0.5 1.01Vs 0.8 2 27 2 200 V % % V V KV V KHz 2 www.irf.com Rev. 2.1 08/20/02 IRU3007 PARAMETER Error Comparator Section Input Bias Current Input Offset Voltage Delay to Output Current Limit Section CS Threshold Set Current CS Comp Offset Voltage Hiccup Duty Cycle Output Drivers Section Rise Time Fall Time Dead Band Time Between High Side and Synch Drive (Vcore Switcher Only) 2.5V Regulator (V OUT4) Reference Voltage Reference Voltage Dropout Voltage Load Regulation Line Regulation Input Bias Current Output Current Current Limit Thermal Shutdown 1.5V Regulator (V OUT3) Reference Voltage Reference Voltage Input Bias Current Output Drive Current Power Good Section Core UV Lower Trip Point Core UV Upper Trip Point Core UV Hysteresis Core OV Upper Trip Point Core OV Lower Trip Point Core OV Hysteresis I/O UV lower trip point I/O UV Upper Trip Point Fb4 Lower Trip Point Fb4 Upper Trip Point Fb3 Lower Trip Point Fb3 Upper Trip Point Power Good Output LO Power Good Output HI Fault (Over-Voltage) Section Core OV Upper Trip Point Core OV Lower Trip Point Soft-Start Section Pull-Up Resistor to 5V I/O OV Upper Trip Point I/O OV Lower Trip Point Fault Output HI Rev. 2.1 08/20/02 SYM TEST CONDITION MIN TYP MAX UNITS 2 +2 100 mA mV ns mA mV % ns ns ns -2 VDIFF=10mV 200 -5 CSS=0.1m F CL=3000pF CL=3000pF CL=3000pF 10 70 70 200 +5 VO4 TA=258C, V OUT4=Fb4 IO=200mA 1mA