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IRU3033 Dataheets PDF



Part Number IRU3033
Manufacturers International Rectifier
Logo International Rectifier
Description 8-PIN PWM SWITCHER AND LINEAR CONTROLLER IC
Datasheet IRU3033 DatasheetIRU3033 Datasheet (PDF)

( DataSheet : www.DataSheet4U.com ) Data Sheet No. PD94147 IRU3033 8-PIN PWM SWITCHER AND LINEAR CONTROLLER IC FEATURES DESCRIPTION LDO Controller allows the use of a low cost pass transistor for the I/O supply 8-Pin SOIC combines switching and linear controller Internal pre-regulator eliminates cross talk between switching and linear regulators Automatic shut down of the linear regulator when connected to the Vcc2 detect pin On-Board MOSFET Driver Fastest transient response of any controller .

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( DataSheet : www.DataSheet4U.com ) Data Sheet No. PD94147 IRU3033 8-PIN PWM SWITCHER AND LINEAR CONTROLLER IC FEATURES DESCRIPTION LDO Controller allows the use of a low cost pass transistor for the I/O supply 8-Pin SOIC combines switching and linear controller Internal pre-regulator eliminates cross talk between switching and linear regulators Automatic shut down of the linear regulator when connected to the Vcc2 detect pin On-Board MOSFET Driver Fastest transient response of any controller method (0 to 100% Duty Cycle in 100ns) 1% Internal Voltage Reference Internal Under-Voltage Lockout protects MOSFET during start-up The IRU3033 IC combines a switching controller and a linear regulator controller all in a compact 8-pin surface mount package, providing a total solution for dual supply processor applications such as an Intel P55C™ , AMD K6™ , as well as Cyrix 6X86L™ and the M2™ processors. Typically in these applications a dual supply regulator converts 5V to 3.3V for I/O supply and a jumper programmable supply of 1.25V to 3.5V for Core supply. The linear regulator controller portion in the IRU3033 is a programmable controller allowing flexibility for the I/O regulator and has a minimum of 50mA drive current capability designed to provide ample current for an external pass transistor. The IC uses an internal regulator generated from the 12V supply to power the controller as well as the 12V supply to drive the power MOSFET, allowing a low cost N-channel MOSFET switch to be used. The IC also includes an error comparator for fast transient response, a precise voltage reference for setting the output voltage as well as a direct drive of the MOSFET for the minimum part count. APPLICATIONS Dual supply low voltage processor applications, such as: P55C™ , CYRIX M2™ , POWER PC™ and AMD K6™ Simple 5V to 3.3V switcher for Pentium with AGP or Pentium II™ applications TYPICAL APPLICATION 5V C1 R9 C8 V12 Drv1 Drv2 VFB2 R8 Gnd D2 R7 Q1 R10 R6 C6 5V I/O 12V CPU Vcc2 Det IRU3033 V12(SW) VFB1 VHYST L2 C3 R3 L1 Q2 C2 D1 R5 C5 R4 Core C7 Figure 1 - Typical application of IRU3033 in a flexible mother board designed for Intel P55™ , P54™ , AMD K5, K6™ as well as Cyrix M1™ and M2™ applications. Notes: P54C, P55C, Pentium II are trademarks of Intel Corp. K5 & K6 are trademarks of AMD Corp. Cyrix 6X86L, M1, M2 are trademarks of Cyrix Corp. Power PC is trademark of IBM Corp. PACKAGE ORDER INFORMATION TA (°C) 0 To 70 Rev. 1.7 07/17/02 8-PIN PLASTIC SOIC (S) IRU3033CS www.irf.com 1 www.DataSheet4U.com IRU3033 ABSOLUTE MAXIMUM RATINGS V12,V12(SW) Supply Voltages ....................................... Fb Pin Voltages ........................................................ Storage Temperature Range ...................................... Operating Junction Temperature ................................ 20V -0.3V To 5V -65°C To 150°C 0°C To 150°C PACKAGE INFORMATION 8-PIN PLASTIC SOIC (S) TOP VIEW Drv1 1 V12(SW) 2 8 7 6 5 V12 Drv2 VFB2 Gnd VFB1 3 VHYST 4 .


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