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IRU1206 Datasheet(PDF) 3 Page - International Rectifier |
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IRU1206 Datasheet(HTML) 3 Page - International Rectifier |
3 / 12 page IRU1206 / IRU1207 / IRU1208 / IRU1209 3 Rev. 2.3 08/02/02 www.irf.com PIN DESCRIPTIONS The input pin of the 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 drop out voltage during the load transient response. This pin must always be 0.6V higher than VOUT in order for the device to regulate properly. The output of the regulator. A minimum of 2.2 mF capacitor must be connected from this pin to ground. Ground pin. This pin must be connected to the lowest potential in the system and all other pins must be at higher potential with respect to this pin. Enable pin. A low signal or left open on this pin shuts down the output. This pin must be tied HI or to VIN for normal operation. An open collector output that switches low when the output voltage drops about 4% below its expected regulated voltage. A resistor divider from this pin to the VOUT pin and ground sets the output voltage. APPLICATION INFORMATION Stability The IRU120X series of regulators require the use of an output capacitor as part of the frequency compensation in order to make the regulator stable. A minimum of 2.2 mF capacitance and the ESR in the range of 0.5 to 2 V in- sures the stability of the system. Part Number Output Voltage IRU1206-18 1.8V IRU1206-25 2.5V IRU1206-33 3.3V IRU1207-18 1.8V IRU1207-25 2.5V IRU1207-33 3.3V IRU1208 1.24V IRU1209 1.24V Note 1: Low duty cycle pulse testing with Kelvin con- nections is required in order to maintain accurate data. Note 2: Dropout voltage is defined as the minimum dif- ferential voltage between VIN and VOUT required to main- tain regulation at VOUT. It is measured when the output voltage drops 1% below its nominal value. IRU1207, IRU1209 Ground Current - SD Activated Enable Pin Input LO Voltage Enable Pin Input HI Voltage Enable Pin Input LO Current Enable Pin Input HI Current IRU1207, IRU1208 Flag Output Threshold Voltage Flag Output Hysteresis Voltage Flag Output Saturation Voltage Note 3: Ground current is the regulator quiescent cur- rent plus the pass transistor current. The total current from the supply is the sum of the load current plus the ground pin current. Note 4: The specification applies for the junction tem- perature of 0 to +125 8C. VIN (All devices) VOUT (All devices) Gnd (All devices) Enable (IRU1207, IRU1209) Flag (IRU1207, IRU1208) Adj (IRU1208, IRU1209) Table 1 - Output voltage vs. part number. PIN SYMBOL PIN DESCRIPTION IQ(SD) VEN(L) VEN(L) VTH(FG) VHYS VF(SAT) Enable=Open Regulator OFF (Note 4) Regulator ON (Note 4) VEN(L)=0V to 0.8V (Note 4) VEN(L)=2V to Vin (Note 4) Output Ramping Up Io=5mA Io=500 mA PARAMETER SYM TEST CONDITION MIN TYP MAX UNITS 2 0.01 0.1 100 5 0.8 400 230 1 0.8 2 600 mA V V mA mA %VO %VO mV |
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Similar Description - IRU1206 |
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