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ISSUED DATE :2003/08/01 REVISED DATE :2006/06/01C
G E 111 7 A
1A Low Dropout Positive Adjustable or Fixed-Mode Regulator
The GE1117A 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. GE1117A is also well suited for other applications such as VGA cards. GE1117A 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.
Description
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
Package Dimensions
REF. A b c D E L4 L5
Millimeter Min. Max. 4.40 4.80 0.76 1.00 0.36 0.50 8.60 9.00 9.80 10.4 14.7 15.3 6.20 6.60
REF. c1 b1 L e L1 Ø A1
Millimeter Min. Max. 1.25 1.45 1.17 1.47 13.25 14.25 2.54 REF. 2.60 2.89 3.71 3.96 2.60 2.80
Typical Circuit
GE1117A
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ISSUED DATE :2003/08/01 REVISED DATE :2006/06/01C
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
GE1117A
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ISSUED DATE :2003/08/01 REVISED DATE :2006/06/01C
Electrical Characteristics
Parameter Reference Voltage GE1117AADJ GE1117A-1.5 GE1117A-1.8 Output Voltage GE1117A-2.5 GE1117A-3.3 GE1117A-5.0 Line Regulation GE1117A-XXX GE1117AADJ GE1117A-1.5 Load Regulation GE1117A-1.8 GE1117A-2.5 GE1117A-3.3 GE1117A-5.0 Dropout Voltage (VIN-VOUT) Current Limit Minimum Load Current Adjust Pin Current Quiescent Current Thermal Regulation Ripple Rejection GE1117A-XXX GE1117A-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
