SU1117A 1A Low Dropout Positive Adjustable or Fixed-Mode Regulator Elektronische Bauelemente RoHS Compliant Product Description The SU1117A is a low dropout at positive adjustable or fixed-mode regulator with min. of 1A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications such as high-speed bus termination and low current 3.3V logic supply. SU1117A is also well suited for other applications such as VGA cards. SU1117A is guaranteed to have lower than 1.4V dropout at full load current making it ideal to provide well regulated outputs of 1.25 to 5 with 6.4V to 12V input supply. Features * 1.4V Max. Dropout Full Load Current * 3-Terminal Adjustable or Fixed 1.5V,1.8V,2.5V,3.3V,5.0V * Output Current Limiting * Good Noise Rejection * Fast Transient Response * Built-in Thermal Shutdown REF. A b L4 c L3 L1 E Millimeter REF. Min. Max. 4.40 4.80 c2 0.76 1.00 b2 0.00 0.30 B D 0.36 0.5 e 1.50 REF. L 2.29 2.79 9.80 10.4 L2 Millimeter Min. Max. 1.25 1.45 1.17 1.47 8.6 9.0 2.54 REF. 14.6 15.8 0˚ 8˚ 1.27 REF. Typical Circuit http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 1 of 4 SU1117A 1A Low Dropout Positive Elektronische Bauelemente Adjustable or Fixed-Mode Regulator Block Diagram Pin Descriptions I/O Pin# Adj (GND) I 1 Vout O 2 Vin I 3 Name Function A resistor divider from this pin to the Vout pin and ground sets the output voltage (Ground only for fixed mode) The output of the regulator. A minimum of 10uF capacitor must be connected from this pin to ground to insure stability. The input pin of regulator .Typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum dropout voltage during the load transient response .This pin must always be 1.3V higher than Vout in order for the device to regulate properly. Absolute Maximum Ratings Parameter DC Supply Voltage Symbol VIN Power Dissipation PD Storage Temperature Range TST Operating Juction Temperature Range http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A TOP Ratings -0.3 to 12 Internally Limited -65~+150 0~+150 Unit V o C o C Any changing of specification will not be informed individual Page 2 of 4 SU1117A 1A Low Dropout Positive Elektronische Bauelemente Adjustable or Fixed-Mode Regulator Electrical Characteristics PARAMETER Reference Voltage Output Voltage Line Regulation Load Regulation CONDITIONS MIN TYP MAX UNIT 1.275 SU1117AADJ Io=10mA,Tj=25 ,(Vin-Vout )=1.5V 1.225 1.25 V SU1117A-1.5 Io=10mA,Tj=25 ,3V Vin 12V 1.470 1.500 1.530 V SU1117A-1.8 Io=10mA,Tj=25 ,3.3V Vin 12V 1.764 1.800 1.836 V SU1117A-2.5 Io=10mA,Tj=25 ,4V Vin 12V 2.450 2.500 2.550 V SU1117A-3.3 Io=10mA,Tj=25 ,4.8V Vin 12V 3.235 3.300 3.365 V SU1117A-5.0 Io=10mA,Tj=25 ,6.5V Vin 12V 4.900 5.000 5.100 V SU1117A-XXX Io=10mA,Vout+1.5V<Vin<12V,Tj=25 - - 0.2 % SU1117AADJ Vin=3.3V,Vadj=0,0mA<Io<1A,Tj=25 (Note 1,2) - - 1 % SU1117A-1.5 Vin=3V,0mA<Io<1A,TJ=25 - 12 15 mV SU1117A-1.8 Vin=3.3V,0mA<Io<1A,TJ=25 - 15 18 mV SU1117A-2.5 Vin=4V,0mA<Io<1A,TJ=25 - 20 25 mV (Note 1,2) (Note 1,2) (Note 1,2) SU1117A-3.3 Vin=5V,0mA<Io<1A,TJ=25 (Note 1,2) - 26 33 mV SU1117A-5.0 Vin=8V,0mA<Io<1A,TJ=25 (Note 1,2) - 40 50 mV Dropout Voltage (VIN-VOUT) SU1117A-XXX Io=1A,( Vout=0.1% Vout) - 1.3 1.4 V Current Limit SU1117A-XXX Vin-Vout=5V 1.1 - - A Minimum Load Current SU1117A-XXX - 5 10 mA Thermal Regulation TA=25 ,30ms pulse Ripple Rejection 0 Tj 125 - 0.008 0.04 %/W F=120HZ,COUT=25uF Tantalum, IOUT =1A SU1117A-XXX VIN=VOUT +3V Temperature Stability IO=10mA JA Thermal Resistance Junction–to-Ambient(No heat sink ;No air flow) JC Thermal Resistance Control Circuitry/Power Transistor Junction-to-Case - 60 70 dB - 0.5 - % - 91 - /w - 10 - /w Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction Temperature by low duty cycle pulse testing .Load regulation is measured at the output lead =1/18” from the package. Note 2: Line and load regulation are guaranteed up to the maximum power dissipation of 15W.Power dissipation is determined by the difference between input and output and the output current .Guaranteed maximum power dissipation will not be available over the full input/output range. Note 3: Quiescent current is defined as the minimum output current required in maintaining regulation .At 12V input/output differential the device is guaranteed to regulate if the output current is greater than 10mA. h tp://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 3 of 4 SU1117A Elektronische Bauelemente 1A Low Dropout Positive Adjustable or Fixed-Mode Regulator Characteristics Curve h tp://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 4 of 4