ISSUED DATE :2004/12/06 REVISED DATE : G L 11 4 7 - 5 0 Description The GL1147-50 is a low dropout at 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 logic supply. GL1147-50 is also well suited for other applications such as VGA cards .GL1147-50 is guaranteed to have lower than 1.4V dropout at full load current making it ideal to provide well-regulated outputs 5.0V 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 Applications PC peripheral Communication Package Dimensions SOT-223 REF. A C D E I H Typical Circuit Millimeter Min. Max. 6.70 7.30 2.90 3.10 0.02 0.10 10 0 0.60 0.80 0.25 0.35 REF. B J 1 2 3 4 5 Millimeter Min. Max. 13 TYP. 2.30 REF. 6.30 6.70 6.30 6.70 3.30 3.70 3.30 3.70 1.40 1.80 Block Diagram 1 3 2 1/3 ISSUED DATE :2004/12/06 REVISED DATE : Pin Descriptions Name I/O PIN# Vin I 1 Gnd I 2 Vout O 3 FUNCTION 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. 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. Absolute Maximum Ratings Symbol Parameter Vin DC Supply Voltage PD Power Dissipation TST Storage Temperature TOP Operating Junction Temperature Range Ratings Unit 6.4 to 12 V Internally Limited -65 ~ + 150 0 ~ + 150 Electrical Characteristics PARAMETER CONDITIONS MIN TYP MAX UNIT 4.900 5.000 5.100 V Output Voltage Vout Io=10mA,Tj=25 ,6.5V Vin 12V Line Regulation REGLINE REGLOAD Io=10mA,6.5V<Vin<12V,Tj=25 - - 0.2 % Vin=8V,0mA<Io<1A,TJ=25 - 40 50 mV Dropout Voltage (VIN-VOUT) VDROPOUT Io=1A,( Vout=0.1% Vout) - 1.3 1.4 V Current Limit Io Vin-Vout=5V 1.1 - - A Minimum Load Current IQ 0 10 mA Thermal Regulation TA=25 ,30ms pulse Load Regulation Ripple Rejection Tj 125 (Note 1,2) - 5 - 0.008 - 60 0.04 %/W F=120HZ,COUT=25uF Tantalum, IOUT =1A VIN=VOUT +3V 70 dB Temperature Stability IO=10mA 0.5 % JA Thermal Resistance Junction–to-Ambient(No 117 /w heat sink ;No air flow) JC Thermal Resistance Control Circuitry/Power Transistor 15 /w Junction-to-Case Note 1: See thermal regulation specifications for changes 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 =1/18” from the package. Note 2: Line and load regulation are guaranteed up to the maximum power dissipation of 15W.Power dissipation is determined by the difference between input and output 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 in maintaining regulation .At 12V input/output differential the device is guaranteed to regulate if the output current is greater than 10mA. 2/3 ISSUED DATE :2004/12/06 REVISED DATE : Characteristics Curve 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 3/3