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US2075 Datasheet(PDF) 1 Page - UNISEM |
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US2075 Datasheet(HTML) 1 Page - UNISEM |
1 / 4 page US2075 4-1 Rev. 1.2 4/26/98 PWM SWITCHER CONTROLLER & 7.5A LOW DROPOUT REGULATOR COMBO TYPICAL APPLICATION TYPICAL APPLICATION Typical application of US2075 in a flexible mother board designed for Intel P55 ™,P54™ AMD K5,K6 ™ as well as Cyrix M1™ and M2™ applications. PACKAGE ORDER INFORMATION PACKAGE ORDER INFORMATION Tj ( °C) 7 PIN PLASTIC 7 PIN PLASTIC TO220 (T) TO263 (M) 0 TO 125 US2075CT US2075CM Notes: P54C,P55C are trade marks of Intel Corp. K5 & K6 are trade marks of AMD corp. Cyrix 6X86L,M1,M2 are trade marks of Cyrix Corp. Power PC is trade mark of IBM Corp. DESCRIPTION DESCRIPTION The US2075 is a dual function IC combining a switching controller and a 7.5A low dropout regulator all in a com- pact 7 pin TO220 and TO263 surface mount pack- ages providing a total solution for dual supply proces- sor 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 pro- grammable supply of 2.8V to 3.5V for CORE supply .The linear regulator portion in the US2075 is a fixed 3.30V output and has a minimum of 7.5A current capability designed to provide ample current for most applications while the switching regulator controller uses the 5V sup- ply to power the controller and the 12V supply to drive the power MOSFET, allowing a low cost N- MOS switch to be used. The IC also includes an error comparator for fastest 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. FEATURES FEATURES The US2075 eliminates the need for a seperate switching controller IC Minimum part count allows lower system cost Fixed 3.30V/7.5A LDO on board On board MOSFET driver Fastest transient response of any controller method. ( 0 to 100% Duty Cycle in 100 nS ) 1% internal voltage reference Internal Thermal shutdown Internal Under Voltage Lockout protects MOSFET during start-up APPLICATIONS APPLICATIONS Dual supply low voltage processor applications, such as: P55C ™,CYRIX M2™, POWER PC™ and AMD PATENT PENDING 5V 2.8V / 10A 12V 3.30V / 7.5A 2075ap1a-1.0 US2075 Drv V12 Vfb Gnd Vhyst Vout V5 1 2 3 4 5 6 7 |
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