CM8566

CM8566 2A ADJUSTABLE LINEAR REGULATOR GENERAL DESCRIPTION The CM8566 is a low cost linear regulator designed to provide a desired output voltage or termination voltage for various applications by converting voltage supplies ranging from 1.6V to 6.0V. The desired output voltage could be programmable by two external voltage divider resistors. The CM8566 is capable of sourcing or sinking up to 2A of current while regulating an output VOUT voltage . The CM8566 provides low profile 8-pin SOIC package to save system space. FEATURES 8-pin SOIC w/ power pad package 2 ways to adjust the output, VOUT with VFB pin Source and sink up to 2A , no heat sink required Integrated power MOSFETs Programmable output voltage by external resistors Output voltage could go down to 0.6V Iccq at VCCA less than 500uA Current limit protection and Short Circuit protection Thermal shutdown protection Shutdown for standby or suspend mode operation Minimum external components APPLICATIONS Mother Board PCI/AGP Graphics Game/ Play Station Set Top Box IPC SCSI-III Bus terminator PIN CONFIGURATION SOP-8 (S08) Top View 2007/02/01 Rev. 1.0 Champion Microelectronic Corporation Page 1 CM8566 2A ADJUSTABLE LINEAR REGULATOR PIN DESCRIPTION Pin No. 8-Pin 1 2 3 4 5/7/8 6 Symbol VIN GND REFEN VOUT NC VCNTL Voltage supply for internal circuits 6 V Input Power Power Ground Reference Voltage Input and Chip Enable Output Voltage 6 6 V V Description Operating Rating Min. Typ. 2.5/1.8 Max. 6 Unit V ORDERING INFORMATION Part Number CM8566IS CM8566GIS Temperature Range -40℃ to 85℃ -40℃ to 85℃ Package 8-Pin SOP (S08) 8-Pin SOP (S08) BLOCK DIAGRAM VCCA VIN Current Limit Protection REFEN Control + VOUT - Thermal GND 5-Pin Block Diagram VCCA VIN Current Limit Protection REFEN Control + VOUT - Thermal PGND VFB 8-Pin Block Diagram 2007/02/01 Rev. 1.0 Champion Microelectronic Corporation Page 2 CM8566 2A ADJUSTABLE LINEAR REGULATOR APPLICATION CIRCUITS VCCA VIN R1 & R2 to fix the Vref, and Vout will follow Vref R1 VCCA VIN CIN 470uF CVCCA 10uF GND REFEN VOUT VFB COUT 200uF VOUT Q1 R2 EN CSS 1uF Application Circuit as Fixed LDO VCCA VIN R3 & R4 to set VFB, and Vout range could be adjusted from 0V to VIN R1 VCCA VIN CIN 470uF CVCCA 10uF GND REFEN VOUT VFB R3 COUT 200uF VOUT Q1 R2 EN CSS 1uF R4 Application Circuit as Adjustable LDO 2007/02/01 Rev. 1.0 Champion Microelectronic Corporation Page 3 CM8566 2A ADJUSTABLE LINEAR REGULATOR ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings are those values beyond which the device could be permanently damaged. VIN, VCCA, VFB …................................…....….…………..6V Lead Temperature (Soldering, 5 sec)……….……….. 260°C Thermal Resistance(θJC)………..……..… 14°C/W (PSOP-8) Thermal Resistance(θJA)……………………….…… 75°C/W Output RMS Current, Source or Sink .....………….........…...2A Storage Temperature ……...................…….. -65°C to 125°C ELECTRICAL CHARACTERISTICS (Unless otherwise stated, these specifications apply TA=25°C; VIN=+2.5V and VCCA=+3.3V, VREFEN=1.25V) maximum ratings are stress ratings only and functional device operation is not implied. (Note 1) CM8566 Symbol VOS ｜ΔVLOAD｜ ISHDN VIN Input Voltage Range (DDR l/ll) VCNTL SHORT CIRCUIT PROTECTION ILIMIT IQ Current Limit Quiescent Current IL=2.0A --2.5 1.4 -3 A mA Parameter Output Offset Voltage Load Regulation (DDR I/II) Current in Shutdown Mode Test Conditions Min. IOUT=0A (Note 2) IL: 0A -> 2A IL: 0A -> -2A REFEN