IRU3004CWTR International Rectifier, IRU3004CWTR Datasheet
IRU3004CWTR
Specifications of IRU3004CWTR
Available stocks
Related parts for IRU3004CWTR
IRU3004CWTR Summary of contents
Page 1
PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC WITH DUAL LDO CONTROLLER FEATURES Meets latest VRM 8.4 specification for PentiumIII Provides single chip solution for Vcore, GTL+ and clock supply On-Board DAC programs the output voltage from 1.3V to 3.5V. The IRU3004 ...
Page 2
IRU3004 ABSOLUTE MAXIMUM RATINGS V5 Supply Voltage .................................................... 10V V12 Supply Voltage .................................................. 20V Storage Temperature Range ...................................... -65°C To 150°C Operating Junction Temperature Range ..................... PACKAGE INFORMATION 20-PIN WIDE BODY PLASTIC SOIC (W) TOP VIEW ...
Page 3
PARAMETER SYM UVLO Section UVLO Threshold-12V UVLO Hysteresis-12V UVLO Threshold-5V UVLO Hysteresis-5V 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 Supply Current ...
Page 4
IRU3004 PIN DESCRIPTIONS PIN# PIN SYMBOL PIN DESCRIPTION 1 Ct This pin programs the oscillator frequency in the range of 50KHz to 500KHz with an external capacitor connected from this pin to the ground. 2 Lin1 This pin controls the ...
Page 5
BLOCK DIAGRAM Enable V12 12 UVLO V5 5 Vset D0 19 Enable D1 5Bit 18 DAC Ctrl Logic FB2 Lin2 20 Lin1 2 V FB1 3 Figure 2 - Simplified block diagram ...
Page 6
IRU3004 TYPICAL APPLICATION Pentium III C13 12V R18 V12 V5 CS VID4 VID3 VID2 ...
Page 7
IRU3004 APPLICATION PARTS LIST Ref Desig Description Q1 MOSFET Q2 MOSFET Q3 Bipolar Trans MOSFET L1 Inductor L2 Inductor C1 Capacitor, Ceramic C2, 6 Capacitor, Ceramic C3 Capacitor, Electrolytic 2 C4 Capacitor, Ceramic C5 Capacitor, Ceramic C7, 14, ...
Page 8
IRU3004 TYPICAL APPLICATION Pentium with AGP C13 C3 3. 12V R18 V12 V5 CS VID4 VID3 VID2 VID1 VID0 Figure 4 - Typical application of IRU3004 in ...
Page 9
IRU3004 APPLICATION PARTS LIST Ref Desig Description Q1 MOSFET Q2 MOSFET Q3, 4 MOSFET L1 Inductor L2 Inductor C1 Capacitor, Ceramic C2, 6 Capacitor, Ceramic C3 Capacitor, Electrolytic C4 Capacitor, Ceramic C5 Capacitor, Ceramic C7, 14, 15 Capacitor, Ceramic C8 ...
Page 10
IRU3004 APPLICATION INFORMATION An example of how to calculate the components for the application circuit is given below. Assuming, two sets of output conditions that this regu- lator must meet: a) Vo=2.8V, Io=14.2A, DVo=185mV, DIo=14.2A b) Vo=2V, Io=14.2A, DVo=140mV, DIo=14.2A ...
Page 11
Output Inductor Selection The output inductance must be selected such that un- der low line and the maximum output voltage condition, the inductor current slope times the output capacitor ESR is ramping up faster than the capacitor voltage is drooping ...
Page 12
IRU3004 With the maximum heat sink temperature calculated in the previous step, the heat-sink-to-air thermal resistance ( calculated as follows: SA Assuming T = 358C 118 - 35 = 838C A ...
Page 13
With the maximum heat sink temperature calculated in the previous step, the heat-sink-to-air thermal resistance ( calculated as follows: SA Assuming T = 358C 118 - 35 = 838C A Temperature ...
Page 14
IRU3004 Input Filter It is recommended to place an inductor between the system 5V supply and the input capacitors of the switch- ing regulator to isolate the 5V supply from the switching noise that occurs during the turn on and ...
Page 15
A 1.0 DIA NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. Rev. 1.7 07/16/02 (F) TSSOP Package 20-Pin 20-PIN SYMBOL DESIG MIN NOM ...
Page 16
IRU3004 20-Pin Surface Mount, Wide Body PIN NO. 1 NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. 16 (W) SOIC Package C E DETAIL 0.51 0.020 SYMBOL 20-PIN MIN MAX ...
Page 17
PACKAGE SHIPMENT METHOD PKG PACKAGE DESIG DESCRIPTION F TSSOP Plastic W SOIC, Wide Body 1 1 Feed Direction Figure A IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 Rev. 1.7 07/16/02 PIN PARTS COUNT ...