GU1084

ISSUED DATE :2003/06/14 REVISED DATE :2006/03/29E GU1084 5A Low Dropout Positive Adjustable or Fixed-Mode Regulator The GU1084 is a low dropout positive adjustable or fixed mode regulator with minimum of 5.0A 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. GU1084 is also well suited for other applications such as VGA cards. GU1084 is guaranteed to have lower than 1.5V dropout at full load current making it ideal to provide well regulated outputs of 1.25 to 3.3V with 4.7 to 12V input supply. Description Features & maximum dropout at full load current 1.5V Package Dimensions &Built-in thermal shutdown &Output current limiting &Adjustable output voltage or fixed 1.5V,1.8V,2.5V,3.3V,5.0V &Fast transient response &Good noise rejection 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 Block Diagram Pin Descriptions Name Adj (GND) Vout O I/O PIN# 1 2 Adjustable (Ground only for fixed mode) The output of the regulator. A minimum of 10uF c apacitor 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 1.5V higher than Vout in order for the device to r egulate properly. FUNCTION Vin I 3 GU1084 Page: 1/4 ISSUED DATE :2003/06/14 REVISED DATE :2006/03/29E Absolute Maximum Ratings Symbol Vin PD TST TOP DC Supply Voltage P ower Dissipation Storage Temperature Operating Junction Temperature Range Parameter Ratings -0.3 to 12 Internally Limited -65 ~ + 150 0 ~ + 150 : : Unit V Electrical Characteristics Symbol VREF Parameter GU1084ADJ GU1084-1.5 GU1084-1.8 Output Voltage GU1084-2.5 GU1084-3.3 GU1084-5.0 Line Regulation GU1084XXX GU1084ADJ GU1084-1.5 Load Regulation GU1084-1.8 GU1084-2.5 GU1084-3.3 GU1084-5.0 Vo ILIM IMIN IADJ IQ Dropout Voltage Current Limit Minimum Load Current Adjust Pin Current Quiescent Current Temperature Stability JA JC Thermal Resistance Junction-to-Ambient(No heat sink ;No air flow) Thermal Resistance Junction-to-Case Conditions(Notes) Io=10mA, Tj=25 : , (Vin-Vout )=1.5V Io=10mA, Tj=25 : , 3.0V Vin 12V Io=10mA, Tj=25 : , 3.3V Vin 12V Io=10mA, Tj=25 : , 4.0V Vin 12V Io=10mA, Tj=25 : , 4.8V Vin 12V Io=10mA, Tj=25 : , 6.5V Vin 12V Io=10mA, Vout+1.5V