RT9173BCS Richtek Technology Corporation, RT9173BCS Datasheet
RT9173BCS
Available stocks
Related parts for RT9173BCS
RT9173BCS Summary of contents
Page 1
... Operation with High-impedance Output Applications DDR Memory Termination Supply Active Termination Buses Desktop PC/AGP Graphics pins on Set Top Box/IPC CNTL Supply Splitter Pin Configurations Part Number RT9173BCS (Plastic SOP-8) RT9173BCL5 (Plastic TO-252-5) RT9173B ) and DDR External Resistors OUT Pin Configurations TOP VIEW ...
Page 2
RT9173B Typical Application Circuit V = 3.3V CNTL C CNTL 2N7002 100KΩ 10µF (Ceramic) + 1000µF under the worst case test condition C OUT(min 1kΩ as for V ...
Page 3
Absolute Maximum Ratings Input Voltage Power Dissipation ESD Susceptibility (Note 2) Storage Temperature Range Lead Temperature (Soldering, 10 sec.) Package Thermal Resistance TO-252,θ JC SOP-8, θ JC Recommended Operating Conditions Junction Temperature Range Electrical Characteristics (V = 2.5V ...
Page 4
RT9173B Note 1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the ...
Page 5
V REFEN 0.2V 1.25V V OUT 0V DS9173B-00 June 2003 Preliminary Power Supply with Current Limit 3.3V 2.5V VCNTL VIN RT9173B REFEN VOUT GND Fig.4 Current Limit for Low Side, I 3.3V VCNTL RT9173B REFEN GND V would ...
Page 6
RT9173B Typical Operating Characteristics Source Current Limit vs. Temperature Source Current vs. Temperature 3.8 3.4 3 2.6 2.2 1.8 -40 -25 - Temperature Sink Current Limit vs. Temperature Sink Current vs. Temperature 3 1.8V,V ...
Page 7
Output Voltage vs. Temperature 1. 2. 3.3V CNTL 1.255 1.25 1.245 1.24 -40 -25 - Temperature (°C) 0. Transient Response 0.9V REFEN Swing Frequency: 1kHz 100 ...
Page 8
RT9173B Output Short-Circuit Protection Source Force the output shorted to ground Time (1ms/DIV) Power Dissipation vs. Copper Area 300 125°C 250 200 150 65°C 100 50 0 ...
Page 9
... Minimize trace length and use wide traces between the voltage regulator output and the RT9173B V (Inductance, Resistance, and Capacitance), which can cause undesired ringing. The RT9173BCS regulator is packaged in plastic Terminator Resistor SOP-8 package. This small footprint package is unable to convectively dissipate the heat generated R0 BUS(0) when the regulator is operating at high current levels ...
Page 10
... RT9173B Use vias to conduct the heat into the buried or backside of PCB RT9173BCS (SOP-8) The PCB heat sink copper area should be solder-painted without masked. This approaches a “best case” pad heat sink. Fig. 6 Layout Consideration To prevent this maximum junction temperature from being exceeded, the appropriate power plane heat sink MUST be used ...
Page 11
Package Information Symbol DS9173B-00 June 2003 Preliminary Dimensions In Millimeters Min Max 4.801 5.004 3.810 3.988 1.346 1.753 0.330 0.508 0.406 1.270 1.194 1.346 ...
Page 12
RT9173B D A Symbol www.richtek.com 12 Preliminary Dimensions In Millimeters Min Max 2.184 2.388 0.381 0.889 4.953 5.461 0.457 0.889 5.334 ...
Page 13
DS9173B-00 June 2003 Preliminary RT9173B www.richtek.com 13 ...
Page 14
RT9173B RICHTEK TECHNOLOGY CORP. Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 www.richtek.com 14 Preliminary RICHTEK TECHNOLOGY CORP. Taipei Office (Marketing) 8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taiwan, ...