G954 Global Mixed-mode Technology Inc. 2A Low Dropout Regulator Features General Description The G954 is a high performance positive voltage regulator designed for use in applications requiring very low dropout voltage at up to 2 Amps. Since it has superior dropout characteristics compared with regular LDOs, it can be used to supply 2.5V on motherboards or 1.5V, 1.8V on peripheral cards from the power supply thus allowing the elimination of costly heatsinks. The G954 provides excellent regulation over variations in line, load and temperature. It provides over current and over temperature protection functions. Fixed Output Voltage 1.2V, 1.5V, 1.8V and 2.5V Over Current and Over Temperature Protection Output Current 2A TO-263 & TO-263T Package Applications Battery Powered Systems Motherboards Peripheral Cards Network Cards Set Top Boxes Notebook Computers ORDER NUMBER The G954 is available with 1.2V, 1.5V, 1.8V, 2.5V and adjustable outputs in TO-263 & TO-263T package. MARKING VOLTAGE TEMP. RANGE PACKAGE (Pb free) G954-12T55U G954-15T55U G954-12 G954-15 1.2V 1.5V -40°C ~ +85°C -40°C ~ +85°C TO-263 TO-263 G954-18T55U G954-25T55U G954-12TU5U G954-18 G954-25 G954-12 1.8V 2.5V 1.2V -40°C ~ +85°C -40°C ~ +85°C -40°C ~ +85°C TO-263 TO-263 TO-263T G954-15TU5U G954-15 1.5V -40°C ~ +85°C TO-263T G954-18TU5U G954-25TU5U G954-18 G954-25 TU: TO-263T 1.8V 2.5V -40°C ~ +85°C -40°C ~ +85°C TO-263T TO-263T Note: T5: TO-263 5: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit VIN Top View 1 2 VO G954 3 220µF 220µF VIN GND VO TO-263/TO-263T TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.9 Apr 24, 2007 1 G954 Global Mixed-mode Technology Inc. Absolute Maximum Ratings Operation Conditions (Note 1) Input Voltage . . . . . . . . . . . . . . . . . . . . . . . 2.2V ~5.5V Temperature Range . . . . . . . . . . . .-40°C ≤TA ≤ +85°C (Note 1) Input Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Power Dissipation Internally Limited (Note 2) Maximum Junction Temperature. . . . . . . . . . . . 150°C Storage Temperature Range. . . . -65°C ≤TJ ≤ +150°C Reflow Temperature (soldering, 10sec) . . . . . .260°C Thermal Resistance Junction to Ambient, (θJA) TO-263T(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . .80°C/W Thermal Resistance Junction to Case, (θJc) TO-263T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8°C/W ESD Rating (Human Body Model) . . . . . . . . . . . . 2kV Note (1): See Recommended Minimum Footprint Electrical Characteristics VIN = 5V, IO = 0.5A, CIN = COUT = 220µF, TA = TJ = 25°C unless otherwise specified (Note 3) PARAMETER Supply Voltage Output Voltage Line Regulation SYMBOL VIN VO Load Regulation Quiescent Current Ripple Rejection IQ Dropout Voltage VD CONDITION VIN = VO +0.7V, IO = 10mA VO+0.7V < VIN < 5.5V, IO = 10mA G954-12 VIN = 2.5V, 10mA < IOUT < 2A G954-15 VIN = 2.5V, 10mA < IOUT < 2A G954-18 VIN = 3.8V, 10mA < IOUT < 2A G954-25 VIN = 5V, 10mA < IOUT < 2A VIN = 5V fi = 120Hz, 1VP-P, IO = 100mA G954-15 ΔVOUT = 2%, IOUT = 2A G954-18 ΔVOUT = 2%, IOUT = 2A G954-25 ΔVOUT = 2%, IOUT = 2A Short Circuit Current Over Temperature MIN TYP MAX UNIT 2.2 -2 --- --VO 0.2 5.5 2 2 V % % --- 1 2 % --------------- 2.7 55 0.9 0.7 0.5 1 150 4.5 --1.1 0.9 0.7 ----- mA dB V A °C Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Conditions are conditions under which the device functions but the specifications might not be guaranteed. For guaranteed specifications and test conditions see the Electrical Characteristics. Note2: The maximum power dissipation is a function of the maximum junction temperature, TJmax ; total thermal resistance, θJA, and ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is (Tjmax-TA) / θJA. If this dissipation is exceeded, the die temperature will rise above 150°C and IC will go into thermal shutdown. Note3: Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.9 Apr 24, 2007 2 Global Mixed-mode Technology Inc. G954 Definitions Load Regulation The change in output voltage for a change in load current at constant chip temperature. The measurement is made under conditions of low dissipation or by using pulse techniques such that average chip temperature is not significantly affected. Dropout Voltage The input/output voltage differential at which the regulator output no longer maintains regulation against further reductions in input voltage. Measured when the output drops 2% below its nominal value, dropout voltage is affected by junction temperature, load current and minimum input supply requirements. Maximum Power Dissipation The maximum total device dissipation for which the regulator will operate within specifications. Line Regulation The change in output voltage for a change in input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that average chip temperature is not significantly affected. Quiescent Bias Current Current which is used to operate the regulator chip and is not delivered to the load. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.9 Apr 24, 2007 3 G954 Global Mixed-mode Technology Inc. Typical Performance Characteristics ViN-VOUT =3V, CIN = 220µF, COUT =220µF, TA = 25°C, unless otherwise noted. Line Transient Response Short Circuit Current G954-18 Overcurrent Protection Characteristics Ripple Rejection 70 Ripple Rejection (dB) 60 IL=1A 50 IL=2A 40 30 20 10 0 10 100 1000 10000 100000 1000000 Frequency (Hz) G954-18-Start-up G954-18-Start-up TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.9 Apr 24, 2007 4 G954 Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) Max. Power Dissipation vs. TAMB 4.5 4.5 4 4 Max. Dissipation Power (W) Max. Dissipation Power (W) Max. Power Dissipation vs. PCB Top Copper Area 3.5 3 2.5 2 1.5 1 Unit : In2 A=0.5 A=1.0 3.5 A=1.5 3 A=2.0 2.5 A=2.5 2 A=3.0 1.5 A=3.5 1 A=4.0 0.5 0.5 0 0 A=4.5 A=5.0 0.5 1.5 2.5 3.5 4.5 25 35 45 55 65 TAMB (°C) PCB Top Copper Area (in2) 75 85 G954-18 Dropout Voltage vs. IL G954-18 Quiescent Current vs. Temperature 3.0 1.4 1.2 2.5 Dropout Voltage (V) Quiescent Current (mA) IL=10mA 2.0 1.0 0.8 0.6 0.4 1.5 VIN=4V VIN=5V 0.2 1.0 TA=85°C 0.0 -25 -15 -5 5 15 25 35 45 55 65 75 85 Temperature (°C) 1 1.2 1.4 1.6 1.8 2 IL (A) G954-18 Output Voltage vs. IL G954-18 Output Voltage vs. Temperature 1.825 1.824 IL=10mA 1.814 Output Voltage (V) 1.820 Output Voltage (V) TA=25°C TA=-25°C 1.815 1.810 IL=5A IL=4A 1.805 1.804 VIN=4V 1.794 VIN=5V 1.784 1.774 TA=25°C 1.764 1.800 5 15 25 35 45 55 Temperature (°C) 65 75 0 85 0.5 1 1.5 2 IL (A) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.9 Apr 24, 2007 5 G954 Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) G954-25 Dropout Voltage vs. IL G954-25 Quiescent Current vs. Temperature 3.50 1000 900 800 Dropout Voltage (mV) Quiescent Current (mA) 3.00 2.50 2.00 VIN=6V VIN=5V TA=85°C 700 600 500 400 300 TA=25°C 200 1.50 TA=-25°C 100 0 1.00 -25 -15 -5 5 15 25 35 45 55 65 75 1 85 1.2 1.4 1.6 1.8 2 IL (A) Temperature (°C) G954-25 Output Voltage vs. IL G954-25 Output Voltage vs. Temperature 2.55 2.59 2.54 Output Voltage (V) Output Voltage (V) TA=25°C 2.53 2.57 2.55 2.53 2.51 VIN=5V VIN=4V 2.49 2.52 2.51 2.5 2.49 VIN=4V VIN=5V 2.48 2.47 2.47 IL=10mA 2.46 2.45 2.45 -25 -5 15 35 55 0 75 0.5 1 1.5 2 IL (A) Temperature (°C) Recommended Minimum Footprint TO-263 TO-263T TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.9 Apr 24, 2007 6 G954 Global Mixed-mode Technology Inc. Package Information A D c1 B V L3 E b1 L A1 L1 b L2 e e1 c TO-263 (T5) Package SYMBOL A A1 B b b1 c c1 D E e e1 L L1 L2 L3 V MILLIMETER INCH MIN MAX MIN MAX 4.470 0.000 1.170 0.710 1.170 0.310 1.170 10.010 8.500 4.670 0.150 1.370 0.910 1.370 0.530 1.370 10.310 8.900 0.176 0.000 0.046 0.028 0.046 0.012 0.046 0.394 0.335 0.184 0.006 0.054 0.036 0.054 0.021 0.054 0.406 0.350 5.180 15.450 5.480 2.740 1.700 0.196 0.593 0.200 0.092 0.051 2.540 TYP 4.980 15.050 5.080 2.340 1.300 0.100 TYP 5.600 REF 0.204 0.608 0.216 0.108 0.067 0.220 REF TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.9 Apr 24, 2007 7 G954 Global Mixed-mode Technology Inc. A D1 c1 B V E L1 L L3 L2 b c e e1 TO-263T (TU) Package SYMBOL A B b c c1 D E e e1 L L1 L2 L3 V DIMENSIONS IN MILLIMETER MIN NOM 1.750 0.880 1.255 0.381 0.356 9.660 8.380 --------13.74 ----2.290 --------- 2.000 1.280 1.295 0.406 0.406 10.160 8.680 2.540 5.080 14.240 4.280 2.540 ----7.280 DIMENSIONS IN INCH MAX MIN NOM MAX 2.250 1.680 1.335 0.431 0.456 10.660 8.980 --------14.740 ----2.790 1.778 ----- 0.069 0.345 0.049 0.015 0.014 0.380 0.330 --------0.541 ----0.090 --------- 0.079 0.050 0.051 0.016 0.016 0.400 0.342 0.100 0.200 0.561 0.169 0.100 ----0.287 0.089 0.066 0.053 0.017 0.018 0.420 0.354 --------0.580 ----0.110 0.070 ----- Taping Specification PACKAGE Q’TY/REEL TO-263 TO-263T 800 ea 1,500 ea Feed Direction TO-263/TO-263T Package Orientation GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.9 Apr 24, 2007 8