GS2905 500mA CMOS LDO Voltage Regulator Product Description The GS2905 series is a group of positive voltage output, three-pin regulators, that provide a high current even when the input/output voltage differential is small. Low power consumption and high accuracy is achieved through CMOS and programmable fuse technologies. Output voltage: 1.5V to 6.0V. The GS2905 consists of a high-precision voltage reference, an error correction circuit, and a current limited output driver. Transient response to load variations has improved in comparison to the existing series. The GS2905 incorporates both over-temperature and over-current protection. SOT-89 and SOT-223 packages are available. Features Applications n Maximum output current: 500mA n Highly accurate: Output voltage ± 1.4% n Battery-Operated Systems (± 1% for semi-custom products) n Portable Computer n Low power consumption n Portable Cameras and Video Recorders n Over-Current and Over-temperature n Voltage Regulator for Microprocessor Protection n Reference Voltage Sources Small input/output differential:0.3V at n Voltage Regulator for CD- ROM Drivers, n Wireless Communication Systems n 300mA www.globaltechsemi.com LAN Cards and DVD. n Instrumentation n Pagers 1 GS2905 GS2905 Globaltech Semiconductor Block Diagram V IN 1 3 V OUT CURRENT LIMITING THERMAL SHUTDOWN 0.9V REFERENCE 2 GND Packages & Pin Assignments GS2905Y (SOT-89) GS2905X (SOT-223) 1 1 2 2 3 3 Pin1 = GND Pin1 = GND Pin2 = VIN Pin2 = VIN Pin3 = VOUT Pin3 = VOUT Ordering Information SOT-89 SOT-223 Output GS2905Y15 GS2905X15 1.5V GS2905Y18 GS2905X18 1.8V GS2905Y25 GS2905X25 2.5V GS2905Y33 GS2905X33 3.3V GS2905Y36 GS2905X36 3.6V GS2905Y50 GS2905X50 *GS2905XF, X means package type and F means Lead Free part. *For other output voltages, please contact factory. www.globaltechsemi.com 2 5.0V GS2905 GS2905 Globaltech Semiconductor Absolute Maximum Ratings Symbol Parameter Maximum SOT-89 120 SOT223 100 Unit °C/W uJA Thermal Resistance VIN Input Voltage 6.5 V IOUT Output Current 500 mA VOUT Output Voltage VSS-0.3 to VIN +0.3 V 0 to 70 °C -65 to 150 °C 300 °C TJ Operating Junction Temperature TSTG Storage temperature Range TLEAD Lead Temperature (Soldering, 10 sec) Note: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Maximum Ratings conditions for extended periods may affect device reliability. Electrical Characteristics VOUT (T) =2.0 (Note 1) Parameter Output Voltage Accuracy Min Typ. Max IOUT = 1mA -1.4% - 1.4% IOUT = 0.1mA to 500mA (TA=25°C) -4.5% - 2.0% - 0.1 0.3 %/V - 0.005 0.04 %/mA Line regulation △VOUT/(△VINX△VOUT) Test Conditions Circuit IOUT = 1mA Fig. 1 Unit V (VOUT+0.1V)＜VIN＜6.5V V IN=6V Load Regulation (Note1) Fig. 2 0.1mA＜IOUT＜500mA, C OUT=1µF Maximum output current V IN=5V 500 mA 500 mA VOUT ＞0.96 X VRATING Current Limit Ground Pin Current IOUT= 0mA~500mA Fig. 3 - 15 30 µA IOUT=100mA 100 180 IOUT=500mA 600 900 IOUT=100mA 150 300 IOUT=500mA 750 900 IOUT=100mA 200 400 IOUT=500mA 1100 1500 Dropout Voltage For VOUT＞2.5V For 2.0V＜VOUT≦2.5V For VOUT≦2.0V mV mV mV Note1: Load Regulation is measured using pulse techniques with duty cycle＜5% www.globaltechsemi.com 3 GS2905 GS2905 Globaltech Semiconductor Test Circuits Line Regulation Figure. 1 6.5V 3.4V 1 VIN GS2905-3.3 3 V OUT 2 Io=1mA 1mF GND Load Regulation Figure. 2 PULSE WITH DUTY CYCLES 5% VIN=6V 1 GS2905-3.3 3 1 mF 2 GND VOUT 1 mF 0.1mA Io=500mA Ground Current Figure. 3 VIN=3.8V 1 GS2905-3.3 3 VOUT 2 GND 33V mA www.globaltechsemi.com 4 Io=100mA GS2905 GS2905 Globaltech Semiconductor Typical Performance Characteristics Ground Current VS. Input Voltage 102 GROUND CURRENT(mA) NORMALIZED OUTPUT VOLTAGE(%) Output Voltage VS. Temperature 15.0 101 100 99 98 0 15 30 45 60 10 5.0 0 75 90 TEMPERATURE( 8C) 1 2 3 4 5 6 7 8 INPUT VOLTAGE(V) OUTPUT VOLTAGE(mV,AC) Load Transient Response 20 0 -20 -40 LOAD CURRENT(mA) -60 300 1 0 1 2 3 TIME(ms) www.globaltechsemi.com 4 5 5 GS2905 GS2905 Globaltech Semiconductor Typical Applications Low Dropout Linear Regulator VIN VOUT 1 GS2905-3.3 3 CIN 1 mF 2 C OUT GND 1mF A 1µF (or greater) capacitor is required between the GS2905 output and ground for stability. Without this capacitor the part will oscillate. Even though most types of capacitor may work, the equivalent series resistance (ESR) should be held to 5 or less if Aluminum electrolytic type is used. Many Aluminum electrolytic have electrolytes that freeze at about -30°C, so solid tantalums are recommended for operation below -25°C. The value of this capacitor may be increased without limit. A 0.1µF capacitor (or greater) should be placed from the GS2905 input to ground if the lead inductance between the input and power source exceeds 500nH (approximately 10 inches of trace). www.globaltechsemi.com 6 GS2905 GS2905 Globaltech Semiconductor Package Dimension SOT-223 PLASTIC PACKAGE Θ Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 1.520 1.800 0.060 0.071 A1 0.020 0.100 0.001 0.004 A2 1.500 1.700 0.059 0.067 b 0.610 0.810 0.024 0.032 c 0.250 0.350 0.010 0.014 D 6.300 6.700 0.248 0.264 D1 2.900 3.100 0.114 0.122 E 3.300 3.700 0.130 0.146 E1 6.700 7.300 0.264 0.287 e e1 L L1 2.300 (TYP) 4.500 0.091 (TYP) 4.700 0.177 1.750 (TYP) 0.069 (TYP) 0.900 www.globaltechsemi.com 0.185 0.035 7 GS2905 GS2905 Globaltech Semiconductor SOT-89 PLASTIC PACKAGE Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 1.450 1.550 0.570 0.061 b 0.440 0.480 0.017 0.019 C 0.360 0.400 0.014 0.016 E 4.450 4.550 0.175 0.179 E2 1.500 1.700 0.059 0.067 E3 1.400 (TYP) 0.055 (TYP) e 1.500 (TYP) 0.059 (TYP) e1 3.000 (TYP) 0.118 (TYP) H 4.150 4.250 0.163 0.167 D 2.450 2.550 0.096 0.100 L 0.900 1.100 0.035 0.043 www.globaltechsemi.com 8 GS2905 GS2905 Globaltech Semiconductor Information furnished is believed to be accurate and reliable. However Globaltech Semiconductor assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Globaltech Semiconductor. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information without express written approval of Globaltech Semiconductor. www.globaltechsemi.com 9 GS2905