S1117 ETC1
Document overview
- Manufacturer or author: Provided By www.digicamel.com(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 4
Technical content
Features
/Gb1d adjustable version. /Gb1d Space saving SMD types of SOT-223 and D-Pak(TO-252) /Gb1d 1.1V Drop-out Voltage /Gb1d 1.0A Output Current /Gb1d Current Limiting and Thermal protection /Gb1dOver Current Protection. /Gb1d Ouput trimmed to 2% Tolerance /Gb1d Fast Transient Response General Description The S1117 is a series of low dropout voltage regulators which can pro- vide up to 1A of output current. On chip precision trimming adjusts the refernce/output voltage to within /Gb72%. Current limit is also trimmed to ensure specified output current and controlled short-circuit current. The S1117 series is available in SOT-223 and DPAK power packages. A minimum of 10uF tantalum capacitor is required at the output to improve the transient response and stability. Symbol 1.0A Adjustable LDO Linear Regulator SOT-223 PRELIMINARY DPAK
Applications
/Gb1dPost Regulator for Sitching DC/DC Converter /Gb1dHigh Efficiency Linear Regulator /Gb1dBattery Chargers /Gb1d PC Add on Card /Gb1d Motherboard clock supplies
Electrical Characteristics
( Vin = 3.25V, Co = 10uF, Ta = 25°C, unless otherwise specified) Parameter Symbol Test Condition MIn. Typ. Max. Units Current Limit ILimit VIN - VOUT = 2V 11 . 5 -A Adjust Pin Current Iadj Vin = 3.25V. Io = 10mA 10 35 100 uA Minimum Load Current IMin 10 - - mA Long Term Stability Stable TA = 125°C, 1000hrs -0 . 0 3 1 . 0 % RMS Output Noise 10Hz < f < 10kHz - 0.003 - % Thermal Shutdown Tsd Vin = 3.25V Tj = 130 to 210deg 150 170 200 °C Thermal Shutdown Hysteresis Thys Vin = 3.25V Tj = 210 to 130deg 51 03 5 ° C Over Voltage Protection VOVP Vin = 10V to 25V Io = 10mA 14.4 16.4 18.4 V S1117S1117S1117S1117
-20 0 20 40 60 80 100 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 VCC = 5.3V Vout = 3.3V Temperature = Variable IO = 10mA Output voltage Temperautre -20 0 20 40 60 80 100 VCC = 5.3V VOUT = 3.3V Temp = Variable IO = 0mA ICC[mA] Temperature 0 5 10 15 20 VCC = Variable Vout = 3.3V IO = 9mA ICC[mA] VCC vs Quiescent Current Vin = 5.3V IO = variable Ta = 25/Gb45 VLOAD[mV] Output current vs. Load Regulation 0 2 4 6 8 10 12 14 16 18 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Output Current [A] VIN - VOUT[V] 0.0 0.2 0.4 0.6 0.8 1.0 1.2 IO = variable Ta = 25/Gb45 Drop out Voltage, VDROP[V] Output Current, I O[A] Fig 1. Output current vs. drop out voltage Fig 2. Quiescent current vs. drop out voltage Fig 3. Output current vs. load regulation Fig 4. Absolute Maximum safe operating area S1117S1117S1117S1117
Vout = (1 + R2/R1) X Vref Example) If R1 = 125ohm, Rd=25ohm, Vout = (1 + 25/125) X 1.25 = 1.5V /G58/G57/G9c/G6d /G52 /G59/G59/G9c/G6d /G52 /G7d/G70/G75 /G5c/G7d /G7d/G96/G9c/G9b /G59/G55/G5c/G7d/G47/G88/G9b/G47/G58/G68 S1117 (3) IN OUT(2) GND (1) /G58/G59/G5c/G2df /G59/G5c/G2df