G1085 Global Mixed-mode Technology Inc. 3A Adjustable Low-Dropout Linear Regulator Features General Description The G1085 is a low dropout linear regulator with a dropout of 1.2V at 3A of load current. It is available in an adjustable version, which can set the output from 1.25V to 5V with only two external resistors. Available in Adjust Version Space Saving TO-252 Package and TO-263 Package Internal Short Circuit Current Limiting Internal Over Temperature Protection Output Current 3A The G1085 provides over temperature and over current protection circuits to prevent it from being damaged by abnormal operating conditions. Applications Post Regulation for Switching DC/DC Converter High Efficiency Linear Regulator Battery Charger Battery Powered Instrumentation Motherboard The G1085 is available in TO-252 package and TO- 263 packages. A minimum of 100µF tantalum electrolytic capacitor is required at the output to improve the transient response and stability. Ordering Information ORDER NUMBER ORDER NUMBER G1085T43U G1085T53U G1085T43Uf G1085T53Uf (Pb free) MARKING TEMP. RANGE PACKAGE G1085 G1085 -40°C to +85°C -40°C to +85°C TO-252 TO-263 PIN OPTION 2 3 1 GND/ADJ GND/ADJ VOUT VOUT VIN VIN * For other package types and pin options, please contact us at sales @gmt.com.tw Order Number Identification GXXXX XX X X Packing Type Pin Option Package Type Part Number PACKAGE TYPE PIN OPTION 1 3: GND/ADJ T4: TO-252 T5: TO-263 Package Type 2 VOUT PACKING 3 VIN U & D: Tape & Reel Direction T: Tube Typical Application [Note 4]: Type of COUT IO VIN VIN C1 100µF 2 VOUT GND/ADJ Top View 1 G1085 VOUT R1 R2 COUT 100µF 3 TO-252、TO-263 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.2 Sep 20, 2004 1 G1085 Global Mixed-mode Technology Inc. Absolute Maximum Ratings (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 TO-252(1)………………………………….………125°C/W TO-263(1)………………………………….………100°C/W Thermal Resistance Junction to Case TO-252………….………………..………..….……10°C/W TO-263…..………………………...……..…………6°C/W ESD Rating (Human Body Model)……......................2kV Operating Conditions (Note 1) (VIN-VADJ) Voltage………..…………...………..2.5V~5.5V Temperature Range……………..….….-40°C ≤ TA ≤85°C Note (1): See Recommended Minimum Footprint Electrical Characteristics Operating Conditions: VIN ≤ 7V, TA =TJ = 25°C unless otherwise specified. [Note3] PARAMETER CONDITION MIN TYP MAX UNIT 1.225 --- 1.250 0.5 1.275 1 V % Reference Voltage Line Regulation VIN - VOUT = 2V, IOUT = 10mA (VOUT + 1.5V) < VIN < 7V, IOUT = 10mA Load Regulation (VIN - VOUT) = 2V, 10mA < IOUT <3A ∆VOUT = 2%, IOUT = 3A ----- 0.04 1.3 0.5 1.4 % V (VIN - VOUT) = 2V --- 5.4 --- A Adjust Pin Current Change Minimum Load Current VIN - VOUT = 2V, 10mA < IOUT < 3A 1.5V < (VIN - VOUT) < 5.25V --10 0.15 --- ----- µA mA Quiescent Current VIN - VOUT = 2V --- 80 150 µA --- 48 --- dB --- 0.3 --- % ------- 0.007 150 30 ------- % °C °C Dropout Voltage Current Limit Ripple Rejection Temperature Stability RMS Output Noise (% of VOUT) Thermal Shutdown Thermal Shutdown Hysteresis f = 120Hz, COUT = 10µF Tantalum, (VIN - VOUT) = 3V, IOUT = 1A VIN = 4V, IO =10mA TA = 25°C, 10Hz < f < 10kHz, ILOAD = 10mA Junction Temperature 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. Note4: The type of output capacitor should be tantalum or aluminum. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.2 Sep 20, 2004 2 Global Mixed-mode Technology Inc. G1085 Definitions 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. Output Voltage The G1085 provides an adjustable output voltage from 1.25V to 5V. with two external resistors. It can be formulated as: VOUT = 1.25V x (1+ R2 R1 ) + IADJ x R2 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. IADJ = 80µA (TYP) 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. 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: 1.2 Sep 20, 2004 3 G1085 Global Mixed-mode Technology Inc. Typical Performance Characteristics (VIN-VOUT=3V, VOUT=1.25V, CIN=100µF, COUT =100µF, TA=25°C, unless otherwise noted.) Line Transient Response Load Transient Response Short Circuit-Current Output Noise IL=100mA Ripple Rejection Line Regulation 1.275 70 100mA IL=10mA 1.265 50 2A VOUT (V) Ripple Rejection (dB) 60 40 30 3A 20 1A (VIN-VOUT)>Vdropout Vripple<0.5 VP-P COUT=220µF 10 T=75°C 1.255 1.245 1.235 T=25°C T=25°C 1.225 0 10 100 1000 10000 100000 2.5 1000000 Frequency(Hz) 3 3.5 4 4.5 5 VIN (V) 5.5 6 6.5 7 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.2 Sep 20, 2004 4 G1085 Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) Dropout Voltage vs. IOUT Load Regulation 5 Output Voltage Deviation (mV) 2 Dropout Voltage (V) T = 25°C 1.5 1 0.5 IL = 10mA~2.5A 3 1 VIN = 3V -1 VIN = 5V -3 -5 0 0 1 2 3 -50 4 -30 -10 IOUT (A) 30 50 70 Adj Pin Current vs. Temperature Output Voltage vs. Temperature 100 1.255 1.253 90 Adj Pin Current (µA) VIN = 5V 1.250 VOUT (V) 10 Temperature (°C) VIN = 3V 1.248 1.245 1.243 80 VIN = 5V 70 60 50 VIN = 3V 40 IL = 2.5A IL = 2.5A 30 1.240 -50 -30 -10 10 30 50 -50 70 -30 Temperature (°C) -10 10 30 50 70 Temperature (°C) G1085T43(TO-252) Max. Power Dissipation vs. PCB Top Copper Area TAMB = 25°C ; Still Air G1085T43(TO-252) Max. Power Dissipation vs. TAMB (still air) ( Different PCB Top Copper Area ) 4 4 3.5 3.5 Unit : in2 Max. Dissipation Power (W) Max. Dissipation Power (W) A=0.1 3 2.5 2 1.5 1 A=0.2 A=0.3 3 A=0.4 A=0.5 2.5 A=1.0 A=1.5 2 A=2.0 A=2.5 1.5 A=3.0 1 A=3.5 A=4.0 0.5 0.5 0 0 A=4.5 A=5.0 0 1 2 3 2 4 25 5 PCB Top Copper Area (in ) 35 45 55 TAMB (°C) 65 75 85 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.2 Sep 20, 2004 5 G1085 Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) G1085T53(TO-263) Max. Power Dissipation vs. TAMB (still air) ( Different PCB Top Copper Area ) 4.5 4.5 4 4 Max. Dissipation Power (W) Max. Dissipation Power (W) G1085T53(TO-263) Max. Power Dissipation vs. PCB Top Copper Area TAMB = 25°C ; Still Air 3.5 3 2.5 2 1.5 1 A=1.0 A=2.0 2.5 A=2.5 4.5 A=3.5 1.5 A=4.0 1 0 3.5 A=3.0 2 0 2.5 A=1.5 3 0.5 1.5 A=0.5 3.5 0.5 0.5 Unit : in2 A=4.5 A=5.0 25 PCB Top Copper Area (in2) 35 45 55 TAMB (°C) 65 75 85 Recommend Minimum Footprint TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.2 Sep 20, 2004 6 G1085 Global Mixed-mode Technology Inc. Package Information E A F E1 L1 H D L2 A1 L3 θ b e C e1 TO-252 (T4) Package SYMBOL DIMENSION IN MILLIMETER MIN. MAX. DIMENSION IN INCH MIN. MAX. A A1 2.19 0.89 2.38 1.27 0.086 0.035 0.094 0.050 b C 0.64 0.46 0.89 0.58 0.025 0.018 0.035 0.023 D 5.97 6.22 0.235 0.245 E E1 e e1 F L1 L2 6.35 5.21 6.73 5.46 0.250 0.205 0.265 0.215 5.18 0.58 2.03 1.02 0.156 0.018 0.035 0.025 0.204 0.023 0.080 0.040 2.26 BSC 3.96 0.46 0.89 0.64 0.09 BSC L3 2.40 2.80 0.095 0.110 H 9.40 0° 10.40 4° 0.370 0° 0.410 4° θ TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.2 Sep 20, 2004 7 G1085 Global Mixed-mode Technology Inc. A E A1 L3 D H C L1 L e L2 A2 e1 b b1 TO-263 (T5) Package SYMBOL MILLIMETER INCH MIN MAX MIN MAX A A1 A2 4.30 1.22 2.45 4.70 1.32 2.69 0.169 0.048 0.104 0.185 0.055 0.106 b 0.69 0.94 0.027 0.037 b1 C 1.22 0.36 1.40 0.56 0.048 0.014 0.055 0.022 D E e e1 H 8.64 9.70 2.29 4.83 14.60 9.652 10.54 2.79 5.33 15.78 0.340 0.382 0.090 0.190 0.575 0.380 0.415 0.110 0.210 0.625 L L1 L2 L3 4.70 1.20 2.24 5.84 1.778 2.84 0.185 0.047 0.088 0.230 0.070 0.111 1.40MAX 0.055MAX Package Orientation Feed Direction TO-252 Package Orientation PACKAGE Q’TY/REEL TO-252 TO-263 2,500 ea 1,000 ea Feed Direction TO-263 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: 1.2 Sep 20, 2004 8