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RT9176 Dataheets PDF



Part Number RT9176
Manufacturers Richtek
Logo Richtek
Description 1.5A Fixed and Adjustable Low Dropout Positive Voltage Regulators
Datasheet RT9176 DatasheetRT9176 Datasheet (PDF)

RT9176 1.5A Fixed and Adjustable Low Dropout Positive Voltage Regulators General D escription The RT9176 series of high perf ormance positive voltage regulators is designed or fa pplication s requiring low dropout performance at fully rated current. Additionally, the R T9176 series provides excellent regulation over variations in line and loa d. Outsta nding feature s include low dropout performance at rated current, fa st tra nsient re sponse, internal current-li miting, and thermal-shutdown pr.

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RT9176 1.5A Fixed and Adjustable Low Dropout Positive Voltage Regulators General D escription The RT9176 series of high perf ormance positive voltage regulators is designed or fa pplication s requiring low dropout performance at fully rated current. Additionally, the R T9176 series provides excellent regulation over variations in line and loa d. Outsta nding feature s include low dropout performance at rated current, fa st tra nsient re sponse, internal current-li miting, and thermal-shutdown prote ction of the output device. The RT9176 series of three terminal regulators of fers f ixed a nd a djustable voltage option s available in spa ce-saving SOT -223, TO-252, and TO-263 packages. Feature s z z z z z z z Low Dropout Performance, 1.5V Max. Full Current Rating Over Line a nd Temperature Fast Transient Response ± 2% Output Voltage Accuracy 1.5V, 1.8V, 2.5V, 2.85V, 3.3V, a nd 3.5V Fixed a nd Adjustable Output Voltage SOT-223, TO-252, and TO-263 Packages RoHS Compliant and 100% Lead (Pb)-Free Applications z z Active SCSITermination Low Voltage Microcontrollers Switching Power Supply Post-Regulator Ordering Information RT9176Package Type G : SOT-223 L: TO-252 M : TO-263 z Pin ConFiguration s (TOP VIEW) 3 2 1 VIN VOUT (TAB) ADJ/GND Operating Temperature Range C : Commercial Standard P : Pb Free with Commercial Standard Output Voltage Default : Adjustable 15 : 1.5V 18 : 1.8V 25 : 2.5V 28 : 2.85V 33 : 3.3V 35 : 3.5V Note : RichTek Pb-free products are : −RoHS compliant and compatible with the current requirements of IPC/JEDEC J-ST D-020. −Suitable for use in SnPb or Pb-free soldering processes. −100%matte tin (Sn) plating. SOT-223 3 2 1 VIN VOUT (TAB) ADJ/GND TO-252 3 2 1 VIN VOUT (TAB) ADJ/GND TO-263 DS9176-09 March 2005 www.richtek.com 1 http://www.Datasheet4U.com/ RT9176 Typical Application Circuit RT9176 VIN = 5V + C1 10uF VIN ADJ VOUT VREF IADJ R1 133 1% R2 232 1% + VOUT = 3.45V C2 10uF Tantalum V OUT = V REF (1+ (1) C1 needed if device is far from filter capacitors. (2) C2 required for stability. R2 R1 ) + I ADJ R 2 Figure 1. Adjustable Voltage Regulator VIN = 5V + GND + VIN RT9176-33 VOUT GND + VOUT 3.3V C2 10uF Tantalum C1 10uF IQ (1) C1 needed if device is far from filter capacitors. (2) C2 required for stability. Figure 2. Active SCSI Bus Terminator RT9176-28 VIN VOUT 18 - 27 Lines + 10uF IQ 22uF Figure 3. Fixed Voltage Regulator www.richtek.com 2 DS9176-09 March 2005 http://www.Datasheet4U.com/ RT9176 Function Block Diagram VIN S.O.A. Current Limiting Amplifier LIMIT VOUT SENSE Thermal Overload Voltage Regulation Amplifer VREF ADJ/GND Functional Pin Description Pin Name ADJ/GND VOUT VIN Power Pin Function Adjust Output Voltage or GND Output Voltage Input DS9176-09 March 2005 www.richtek.com 3 http://www.Datasheet4U.com/ RT9176 Absolute Maximum Ratings z z (Note 1) Supply Input Voltage --------------------------------------------------------------------------------------------------15V Power Dissipation, PD @ TA = 25°C SOT-223 -----------------------------------------------------------------------------------------------------------------0.740W TO-252-------------------------------------------------------------------------------------------------------------------1.471W TO-263-------------------------------------------------------------------------------------------------------------------2.222W Package Thermal Resistance (Note 6) SOT-223, θJA ------------------------------------------------------------------------------------------------------------135°C/W SOT-223, θJC -----------------------------------------------------------------------------------------------------------19°C/W TO-252, θJA -------------------------------------------------------------------------------------------------------------68° C/W TO-252, θJC -------------------------------------------------------------------------------------------------------------7.5° C/W TO-263, θJA -------------------------------------------------------------------------------------------------------------45° C/W TO-263, θJC -------------------------------------------------------------------------------------------------------------7.8° C/W Lead Temperature (Soldering, 10 se c.) ---------------------------------------------------------------------------260° C Junction T emperature-------------------------------------------------------------------------------------------------150°C Storage T emperatureRange ----------------------------------------------------------------------------------------−65°C to 150°C ESD Susceptibility (Note 2) HBM (Human Body Mode) ------------------------------------------------------------------------------------------8kV MM (Machine Mode)--------------------------------------------------------------------------------------------------750V (Note 3) z z z z z Recommended Operating Condition s z z Supply Input Voltage -------------------------------------------------------.


RAC04-12DC-277 RT9176 SAA7709H


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