ISSUED DATE :2005/07/11 REVISED DATE :2005/10/04B G S C 111 8 1A Positive Low Dropout Fixed-mode Regulator With EN Function Description The GSC1118 is a low dropout positive 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. GSC1118 is also well suited for other applications such as VGA cards. The product is guaranteed to have <1.4V dropout at full load current making it ideal to provide well regulated outputs 1.5V to 12V with up to 18V input supply. The product offers a TTL-Logic compatible enable pin. Features 1.4V maximum dropout voltage at full load current Built-in thermal shutdown Output current limiting Fixed output voltage 1.5V, 1.8V, 2.5V, 3.3V, 5.0V, 9.0V, 12V Fast transient response Good noise rejection Enable function Applications PC peripheral Communication CDROM.. Package Dimensions REF. A B C D E F Millimeter Min. Max. 5.80 4.80 3.80 0 0.40 0.19 6.20 5.00 4.00 8 0.90 0.25 REF. Millimeter Min. Max. M H L J K G 0.10 0.25 0.35 0.49 1.35 1.75 0.375 REF. 45 1.27 TYP. Typical Circuit GSC1118 Page: 1/3 ISSUED DATE :2005/07/11 REVISED DATE :2005/10/04B Pin Descriptions Name GND VOUT Description Ground The output of the regulator. A minimum of 10uF capacitor must be connected from this pin to ground to insure stability. VIN 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 V OUT in order for the device to regulate properly. EN This input pin of regulator. TTL/CMOS compatible input Logic high= disable output, Logic Low or open= output enable. ( internal pull-down resistor~100K). NC No connection. Absolute Maximum Ratings Symbol VIN VEN PD TST TOP Parameter DC Supply Voltage Enable Pin Voltage Power Dissipation Storage Temperature Range Operating Junction Temperature Range Ratings Unit -0.3 to 18 7 Internally Limited -65 ~ + 150 0 ~ + 150 V V Electrical Characteristics (Under operating Conditions) Parameter Output Voltage Line Regulator Load Regulation Dropout Voltage (VIN-VOUT) Current Limit Minimum Load Current Enable Input Voltage VEN Enable Input Current IEN Thermal Regulation Ripple Rejection Conditions GSC1118-15 GSC1118-18 GSC1118-25 GSC1118-33 GSC1118-50 GSC1118-90 GSC1118-12 GSC1118-XX GSC1118-15 GSC1118-18 GSC1118-25 GSC1118-33 GSC1118-50 GSC1118-90 GSC1118-12 Io=10mA, TJ =25 , 3.0V VIN 15V Io=10mA, TJ =25 , 3.3V VIN 15V Io=10mA, TJ =25 , 4.0V VIN 15V Io=10mA, TJ =25 , 4.8V VIN 15V Io=10mA, TJ =25 , 6.5V VIN 15V Io=10mA, TJ =25 , 10.5V VIN 18 Io=10mA, TJ =25 , 13.5V VIN 18V Io=10mA, TJ =25 , VOUT +1.5< VIN <18V VIN=3.0V, 0mA<Io<1A, TJ=25 , (Note 1, 2) VIN=3.3V, 0mA<Io<1A, TJ=25 , (Note 1, 2) VIN=4.0V, 0mA<Io<1A, TJ=25 , (Note 1, 2) VIN=5.0V, 0mA<Io<1A, TJ=25 , (Note 1, 2) VIN=8.0V, 0mA<Io<1A, TJ=25 , (Note 1, 2) VIN=12.0V, 0mA<Io<1A, TJ=25 , (Note 1, 2) VIN=15.0V, 0mA<Io<1A, TJ=25 , (Note 1, 2) GSC1118-XX Io=1A, VOUT =0.1 VOUT GSC1118-XX (VIN-VOUT)=5V GSC1118-XX 0 TJ 125 Logic Low (ON) Logic High (OFF) VEN=0.8V VEN=2.0V TA=25 , 30ms pulse F=120Hz, COUT =25uF, Tantalum, Io=1A GSC1118-XX VIN=VOUT +3V Io=10mA Temperature Stability JA Thermal Resistance Junction–to-Ambient (No heat sink ;No air flow) JC Thermal Resistance Control Circuitry/Power Transistor Junction-to-Case Min Typ Max Unit 1.470 1.764 2.450 3.235 4.900 8.820 11.760 - 1.500 1.800 2.500 3.300 5.000 9.000 12.00 0- 1.530 1.836 2.550 3.365 5.100 9.180 12.24 0 0.2 12 15 20 26 40 70 100 15 18 25 33 50 90 120 V V V V V V V % mV mV mV mV mV mV % - 1.3 1.4 V 1.1 1.6 - 5 0.008 10 0.8 10 80 0.04 A mA %/W - 60 0.5 70 - dB % - 150 - /W - 25 - /W V A Note 1: See thermal regulation specifications for charges in output voltage due to heating effects. Line and load regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead=1/8” from the package. Note 2: Line and load regulations are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the input/output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range Note 3: Quiescent current is defined as the minimum output current required to maintain regulation. At 12V input/output differential the device is guaranteed to regulate if the output current is greater than 10mA. GSC1118 Page: 2/3 ISSUED DATE :2005/07/11 REVISED DATE :2005/10/04B Typical Performance Characteristics I load=800mA Important Notice: All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of GTM. GTM reserves the right to make changes to its products without notice. GTM semiconductor products are not warranted to be suitable for use in life-support Applications, or systems. GTM assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. Head Office And Factory: Taiwan: No. 17-1 Tatung Rd. Fu Kou Hsin-Chu Industrial Park, Hsin-Chu, Taiwan, R. O. C. TEL : 886-3-597-7061 FAX : 886-3-597-9220, 597-0785 China: (201203) No.255, Jang-Jiang Tsai-Lueng RD. , Pu-Dung-Hsin District, Shang-Hai City, China TEL : 86-21-5895-7671 ~ 4 FAX : 86-21-38950165 GSC1118 Page: 3/3