GM1117A

ISSUED DATE :2003/08/02 REVISED DATE :2006/06/05C G M 111 7 A Description 1A Low Dropout Positive Adjustable or Fixed-Mode Regulator The GM1117A is a low dropout at positive adjustable or fixed-mode regulator with minimum 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. GM1117A is also well suited for other applications such as VGA cards. GM1117A 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 5.0 with 6.4V to 12V input supply. Features & 1.4Vmaximum dropout full load current &Fast transient response &Output current limiting &Built-in thermal shutdown &Good noise rejection &3-Terminal Adjustable or Fixed 1.5V,1.8V,2.5V,3.3V,5.0V Applications & peripheral PC &Communication Package Dimensions SOT-89 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. Typical Circuit GM1117A Page: 1/4 ISSUED DATE :2003/08/02 REVISED DATE :2006/06/05C Block Diagram Pin Descriptions Name Adj (GND) Vout Vin O I I/O Pin# 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 Symbol Vin PD TST TOP DC Supply Voltage Power Dissipation Storage Temperature Operating Junction Temperature Range Parameter Ratings -0.3 to 12 Internally Limited -65 ~ + 150 0 ~ + 150 : : Unit V GM1117A Page: 2/4 ISSUED DATE :2003/08/02 REVISED DATE :2006/06/05C Electrical Characteristics Parameter Reference Voltage GM1117AADJ GM1117A-1.5 GM1117A-1.8 Output Voltage GM1117A-2.5 GM1117A-3.3 GM1117A-5.0 Line Regulation GM1117A-XXX GM1117AADJ GM1117A-1.5 Load Regulation GM1117A-1.8 GM1117A-2.5 GM1117A-3.3 GM1117A-5.0 Dropout Voltage (VIN-VOUT) Current Limit Minimum Load Current Adjust Pin Current Quiescent Current Thermal Regulation Ripple Rejection GM1117A-XXX GM1117A-XXX Adjustable model Adjustable model Conditions 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