ISSUED DATE :2006/03/07 REVISED DATE : GSC2176 6 0 0 m A C M O S P o s i t i v e Vo l t a g e R e g u l a t o r Description The GSC2176 of positive, linear regulators feature low ground current (30 A typ.) with low dropout voltage, making then ideal for battery applications. The space-saving SOP-8 package is attractive for “Pocket” and “Hand Held” applications. These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under the “Worst” of operating conditions. The GSC2176 is stable with an output capacitance of 2.2 F or greater. Features Very Low Dropout Voltage Guaranteed 600mA output Accurate to within 1.5% Over-Temperature Shutdown Current Limiting Short Circuit Current Fold-back Low Temperature Coefficient Power-saving Shutdown Mode User Adjustable Output Voltages Functional Block Diagram Applications Battery Powered Widgets Instrumentation Wireless Devices Cordless Phones PC Peripherals Portable Electronics 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 Application Circuit VOUT=1.215*(1+R1/R2) C2 is unnecessary if R1 or R2 <20K R1 and R2 use resistance value within 1% accuracy for correct VOUT GSC2176 Page: 1/7 ISSUED DATE :2006/03/07 REVISED DATE : Absolute Maximum Ratings Parameter Symbol Ratings Unit Input Max Voltage VIN 8 V Output Current IOUT PD/( VIN- VO) mA Output Voltage VOUT Gnd-0.3 to VIN+0.3 V Operating Ambient Temperature Topr -40 ~ +85 Junction Temperature Maximum Junction Temperature Internal Power Dissipation Tj -40 ~ +125 Tj Max 150 PD 810 EDS Classification Electrical Characteristics TA=25 Parameter Output Voltage Symbol VOUT (E) Output Current Current Limit Short Circuit Current Load Regulation IO ILIM ISC REGLOAD Dropout Voltage Ground Pin Current Line Regulation Input Voltage mW B (Note1) VDROPOUT IGND REGLINE unless otherwise noted Condition Min TYP Max Unit IO=1mA, VIN=VOUT(T)+2V -1.5 VOUT(T) 1.5 % VO>1.2V 600 - - mA VO>1.2V 600 800 - mA VIN=VOUT(T)+1V, VO < 0.8V - 300 600 mA VIN=VOUT(T)+2V, IO=1mA to 600mA - 0.2 1 % 1.5V<VOUT(T) 2.0V - - 1400 2.0V<VOUT(T) 2.8V - - 800 2.8V<VOUT(T) - - 600 - 30 - - - 0.15 - 0.02 0.1 IO=600mA VO=VOUT(E)-2% VIN=VOUT(T)+2V, IO=1mA to 600mA IO=1mA VOUT(T)<2.0V VIN=VOUT(T)+1 to VOUT(T) 2.0V VOUT(T)+2 (Note2) VIN OTS OTH Note3 - 7 - 150 - - 30 - Output Voltage Temperature Coefficient TC - 30 - Power Supply Rejection PSRR Over Temperature Shutdown Over Temperature Hysterisis Output Voltage Noise ADJ Reference Voltage EN Input Threshold EN Input Bias Current Shutdown Supply Current eN VREF VEH VEL IEH IEL ISD Io=100mA Co=2.2 F f=1kHz - 50 - f=10kHz - 20 - f=100kHz - 15 - f=10Hz~100kHz, Io=10mA, Co=2.2 F mV A % V ppm/ dB - 30 - Vrms 1.203 1.215 1.227 V VIN=2.7V to 7V 2.0 - VIN V VIN=2.7V to 7V 0 - 0.4 V VEN=VIN, VIN=2.7V to 7V - - 0.1 A VEN= 0V, VIN=2.7V to 7V - - 0.5 A VIN=5V, VO=0V, VEN<VEL - 0.5 0.1 A Note 1: V OUT (E) =Effective Output Voltage (i.e. the output voltage when “VOUT (T) + 2.0V” is provided at the VIN pin while maintaining a certain IOUT value). 2: VOUT (T) =Specified Output Voltage 3: VIN (MIN) =VOUT+VDROPOUT GSC2176 Page: 2/7 ISSUED DATE :2006/03/07 REVISED DATE : Ordering Information ( contd. ) Part Number GSC2176-AD Marking 6GAD2 XXXX Output Voltage Part Number Marking Output Voltage Adjustable Detailed Description The GSC2176 of COMS regulator contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, and thermal shutdown. The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current and Thermal shutdown circuits become active when the junction temperature exceeds 150 , or the current exceeds 600mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120 . The GSC2176 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The GSC2176 also incorporates current fold-back to reduce power dissipation when the output is short circuited. This feature becomes active when the output drops below 0.8 volts, and reduces the current flow by 65%. Full current is restored when the voltage exceeds 0.8 volts. External Capacitors The GSC2176 is stable with an output capacitance to ground of 2.2 F or greater. Ceramic capacitors have the lowest ESR, and will offer the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the highest ESR, resulting in the poorest AC response. Unfortunately, large value ceramic capacitors are comparatively expensive. One option is to parallel a 0.1uF ceramic capacitor with a 10uF Aluminum Electrolytic. The benefit is low ESR, high capacitance, and low overall cost. A second capacitor is recommended between the input and ground to stabilize VIN. The input capacitor should be at least 0.1 F to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A “Quiet” ground termination is desirable. This can be achieved with a “Star” connection. Enable The Enable pin normally floats high. When actively, pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is less than 1 A. This pin behaves much like an electronic switch. ADJ The ADJ pin is the positive input to the error amplifier which, due to the PMOS pass element inversion, means it is actually the negative input of the LDO feedback loop. The feedback works to keep the voltage at the ADJ pin 1.215V with respect to ground. Since the internal circuitry at the ADJ pin is essentially an ESD protected CMOS gate the input current at the ADJ pin is virtually zero. GSC2176 Page: 3/7 ISSUED DATE :2006/03/07 REVISED DATE : Characteristics Curve GSC2176 Page: 4/7 ISSUED DATE :2006/03/07 REVISED DATE : GSC2176 Page: 5/7 ISSUED DATE :2006/03/07 REVISED DATE : External Resistor Divider Table R1(K Ohm) 1 2 VOUT 3 4 5 6 7 8 9 10 R2(K Ohm)=(1.215*R1(K Ohm))/(VOUT-1.215) 1.30 14.29 28.59 42.88 57.18 71.47 85.76 100.06 114.35 128.65 142.94 1.35 9.00 18.00 27.00 36.00 45.00 54.00 63.00 72.00 81.00 90.00 1.40 6.57 13.14 19.70 26.27 32.84 39.41 45.97 52.54 59.11 65.68 1.45 5.17 10.34 15.51 20.68 25.85 31.02 36.19 41.36 46.53 51.70 1.50 4.26 8.53 12.79 17.05 21.32 25.58 29.84 34.11 38.37 42.63 1.55 3.63 7.25 10.88 14.51 18.13 21.76 25.39 29.01 32.64 36.27 1.60 3.16 6.31 9.47 12.62 15.78 18.94 22.09 25.25 28.40 31.56 1.65 2.79 5.59 8.38 11.17 13.97 16.76 19.55 22.34 25.14 27.93 1.70 2.51 5.01 7.52 10.02 12.53 15.03 17.54 20.04 22.55 25.05 1.75 2.27 4.54 6.81 9.08 11.36 13.63 15.90 18.17 20.44 22.71 1.80 2.08 4.15 6.23 8.31 10.38 12.46 14.54 16.62 18.69 20.77 1.85 1.91 3.83 5.74 7.65 9.57 11.48 13.39 15.31 17.22 19.13 1.90 1.77 3.55 5.32 7.09 8.87 10.64 12.42 14.19 15.96 17.74 1.95 1.65 3.31 4.96 6.61 8.27 9.92 11.57 13.22 14.88 16.53 2.00 1.55 3.10 4.64 6.19 7.74 9.29 10.83 12.38 13.93 15.48 2.05 1.46 2.91 4.37 5.82 7.28 8.73 10.19 11.64 13.10 14.55 2.10 1.37 2.75 4.12 5.49 6.86 8.24 9.61 10.98 12.36 13.73 2.15 1.30 2.60 3.90 5.20 6.50 7.80 9.10 10.40 11.70 12.99 2.20 1.23 2.47 3.70 4.93 6.17 7.40 8.63 9.87 11.10 12.34 2.25 1.71 2.35 3.52 4.70 5.87 7.04 8.22 9.39 10.57 11.74 2.30 1.12 2.24 3.36 4.48 5.60 6.72 7.84 8.96 10.08 11.20 2.35 1.07 2.14 3.21 4.28 5.35 6.42 7.49 8.56 9.63 10.70 2.40 1.03 2.05 3.08 4.10 5.13 6.15 7.18 8.20 9.23 10.25 2.45 0.98 1.97 2.95 3.94 4.92 5.90 6.89 7.87 8.85 9.84 2.50 0.95 1.89 2.84 3.78 4.73 5.67 6.62 7.56 8.51 9.46 2.55 0.91 1.82 2.73 3.64 4.55 5.46 6.37 7.28 8.19 9.10 2.60 0.88 1.75 2.63 3.51 4.39 5.26 6.14 7.02 7.90 8.77 2.65 0.85 1.69 2.54 3.39 4.23 5.08 5.93 6.77 7.62 8.47 2.70 0.82 1.64 2.45 3.27 4.09 4.91 5.73 6.55 7.36 8.18 2.75 0.79 1.58 2.37 3.17 3.96 4.75 5.54 6.33 7.12 7.92 2.80 0.77 1.53 2.30 3.07 3.83 4.60 5.37 6.13 6.90 7.67 2.85 0.74 1.49 2.23 2.97 3.72 4.46 5.20 5.94 6.69 7.43 2.90 0.72 1.44 2.16 2.88 3.61 4.33 5.05 5.77 6.49 7.21 2.95 0.70 1.40 2.10 2.80 3.50 4.20 4.90 5.60 6.30 7.00 3.00 0.68 1.36 2.04 2.72 3.40 4.08 4.76 5.45 6.13 6.81 3.05 0.66 1.32 1.99 2.65 3.31 3.97 4.63 5.30 5.96 6.62 3.10 0.64 1.29 1.93 2.58 3.22 3.87 4.51 5.16 5.80 6.45 3.15 0.63 1.26 1.88 2.51 3.14 3.77 4.40 5.02 5.65 6.28 3.20 0.61 1.22 1.84 2.45 3.06 3.67 4.28 4.90 5.51 6.12 3.25 0.60 1.19 1.79 2.39 2.99 3.58 4.18 4.78 5.37 5.97 3.30 0.58 1.17 1.75 2.33 2.91 3.50 4.08 4.66 5.24 5.83 GSC2176 Page: 6/7 ISSUED DATE :2006/03/07 REVISED DATE : External Resistor Divider Table R1(K Ohm) 1 2 VOUT 3 4 5 6 7 8 9 10 R2(K Ohm)=(1.215*R1(K Ohm))/(VOUT-1.215) 3.35 0.57 1.14 1.71 2.28 2.85 3.41 3.98 4.55 5.12 5.69 3.40 0.56 1.11 1.67 2.22 2.78 3.34 3.89 4.45 5.00 5.56 3.45 0.54 1.09 1.63 2.17 2.72 3.26 3.81 4.35 4.89 5.44 3.50 0.53 1.06 1.60 2.13 2.66 3.19 3.72 4.25 4.79 5.32 3.55 0.52 1.04 1.56 2.08 2.60 3.12 3.64 4.16 4.68 5.20 3.60 0.51 1.02 1.53 2.04 2.55 3.06 3.57 4.08 4.58 5.09 3.65 0.50 1.00 1.50 2.00 2.49 2.99 3.49 3.99 4.49 4.99 3.70 0.49 0.98 1.47 1.96 2.44 2.93 3.42 3.91 4.40 4.89 3.75 0.48 0.96 1.44 1.92 2.40 2.88 3.36 3.83 4.31 4.79 3.80 0.47 0.94 1.41 1.88 2.35 2.82 3.29 3.76 4.23 4.70 3.85 0.46 0.92 1.38 1.84 2.31 2.77 3.23 3.69 4.15 4.61 3.90 0.45 0.91 1.36 1.81 2.26 2.72 3.17 3.62 4.07 4.53 3.95 0.44 0.89 1.33 1.78 2.22 2.67 3.11 3.55 4.00 4.44 4.00 0.44 0.87 1.31 1.75 2.18 2.62 3.05 3.49 3.93 4.36 4.05 0.43 0.86 1.29 1.71 2.14 2.57 3.00 3.43 3.86 4.29 4.10 0.42 0.84 1.26 1.68 2.11 2.53 2.95 3.37 3.79 4.21 4.15 0.41 0.83 1.24 1.66 2.07 2.48 2.90 3.31 3.73 4.14 4.20 0.41 0.81 1.22 1.63 2.04 2.44 2.85 3.26 3.66 4.07 4.25 0.40 0.80 1.20 1.60 2.00 2.40 2.80 3.20 3.60 4.00 4.30 0.39 0.79 1.18 1.58 1.97 2.36 2.76 3.15 3.54 3.94 4.35 0.39 0.78 1.16 1.55 1.94 2.33 2.71 3.10 3.49 3.88 4.40 0.38 0.76 1.14 1.53 1.91 2.29 2.67 3.05 3.43 3.81 4.45 0.38 0.75 1.13 1.50 1.88 2.25 2.63 3.00 3.38 3.76 4.50 0.37 0.74 1.11 1.48 1.85 2.22 2.59 2.96 3.33 3.70 4.55 0.36 0.73 1.09 1.46 1.82 2.19 2.55 2.91 3.28 3.64 4.60 0.36 0.72 1.08 1.44 1.79 2.15 2.51 2.87 3.23 3.59 4.65 0.35 0.71 1.06 1.41 1.77 2.12 2.48 2.83 3.18 3.54 4.70 0.35 0.70 1.05 1.39 1.74 2.09 2.44 2.79 3.14 3.49 4.75 0.34 0.69 1.03 1.37 1.72 2.06 2.41 2.75 3.09 3.44 4.80 0.34 0.68 1.02 1.36 1.69 2.03 2.37 2.71 3.05 3.39 4.85 0.33 0.67 1.00 1.34 1.67 2.01 2.34 2.67 3.01 3.34 4.90 0.33 0.66 0.99 1.32 1.65 1.98 2.31 2.64 2.97 3.30 4.95 0.33 0.65 0.98 1.30 1.63 1.95 2.28 2.60 2.93 3.25 5.00 0.32 0.64 0.96 1.28 1.61 1.93 2.25 2.57 2.89 3.21 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 GSC2176 Page: 7/7