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| SM1117A 1A Low Dropout Positive Elektronische Bauelemente RoHS Compliant Product Adjustable or Fixed-Mode Regulator Description The SM1117A 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. SM1117A is also well suited for other applications such as VGA cards. SM1117A 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. SOT-89 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 C D E F Millimeter Min. Max. 4.4 4.6 4.05 4.25 1.50 1.70 1.30 1.50 2.40 2.60 0.89 1.20 REF. G H I J K L M Millimeter Min. Max. 3.00 REF. 1.50 REF. 0.40 0.52 1.40 1.60 0.35 0.41 5 TYP. 0.70 REF. Applications * PC Peripheral * Communication Typical Circuit 3.3V /0.6A 2.5V/0.6A http://www.SeCoSGmbH.com/ Any changing of specification will not be informed individual 01-Jun-2002 Rev. A Page 1 of 4 SM1117A Elektronische Bauelemente 1A Low Dropout Positive Adjustable or Fixed-Mode Regulator Block Diagram Pin Descriptions Name I/O Pin# Adj (GND) Vout Vin I O I 1 2 3 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 Power Dissipation Storage Temperature Range Operating Juction Temperature Range Symbol VIN PD TST TOP Ratings -0.3 to 12 Internally Limited -65~+150 0~+150 Unit V o o C C http://www.SeCoSGmbH.com/ Any changing of specification will not be informed individual 01-Jun-2002 Rev. A Page 2 of 4 SM1117A Elektronische Bauelemente 1A Low Dropout Positive Adjustable or Fixed-Mode Regulator Electrical Characteristics PARAMETER Reference Voltage SM1117AADJ SM1117A-1.5 SM1117A-1.8 Output Voltage SM1117A-2.5 SM1117A-3.3 SM1117A-5.0 Line Regulation SM1117A-XXX SM1117AADJ SM1117A-1.5 Load Regulation SM1117A-1.8 SM1117A-2.5 SM1117A-3.3 SM1117A-5.0 Dropout Voltage (VIN-VOUT) Current Limit Minimum Load Current Thermal Regulation Ripple Rejection CONDITIONS Io=10mA,Tj=25 ,(Vin-Vout )=1.5V Io=10mA,Tj=25 ,3V Vin 12V Io=10mA,Tj=25 ,3.3V Vin 12V Io=10mA,Tj=25 ,4V Vin 12V Io=10mA,Tj=25 ,4.8V Vin 12V Io=10mA,Tj=25 ,6.5V Vin 12V Io=10mA,Vout+1.5V 1.4 - 0.04 70 10 50 mV V A mA %/W dB Page 3 of 4 Temperature Stability IO=10mA 0.5 % JA Thermal Resistance Junction-to-Ambient(No 300 /w heat sink ;No air flow) JC Thermal Resistance Control Circuitry/Power Transistor 100 /w Junction-to-Case 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/ Any changing of specification will not be informed individual 01-Jun-2002 Rev. A SM1117A Elektronische Bauelemente 1A Low Dropout Positive Adjustable or Fixed-Mode Regulator Characteristics Curve h tp://www.SeCoSGmbH.com/ Any changing of specification will not be informed individual 01-Jun-2002 Rev. A Page 4 of 4 |
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