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| Global Mixed-mode Technology Inc. G1084 5A Adjustable Low-Dropout Linear Regulator Features Available in Adjust Version Space Saving TO-252 Package and TO-263 Package Internal Short Circuit Current Limiting Internal Over Temperature Protection Output Current 5A General Description The G1084 is a low dropout linear regulator with a dropout of 1.2V at 5A 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. The G1084 provides over temperature and over current protection circuits to prevent it from being damaged by abnormal operating conditions. The G1084 is available in TO-252 and TO-263 packages. A minimum of 220F tantalum electrolytic capacitor is required at the output to improve the transient response and stability. Applications Post Regulation for Switching DC/DC Converter High Efficiency Linear Regulator Battery Charger Battery Powered Instrumentation Motherboard Ordering Information ORDER NUMBER G1084T43U G1084T53U ORDER NUMBER MARKING TEMP. RANGE (Pb free) G1084T43Uf G1084T53Uf G1084 G1084 -40C to +85C -40C to +85C PACKAGE TO-252 TO-263 1 GND/ADJ GND/ADJ PIN OPTION 2 3 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 T4: TO-252 T5: TO-263 PIN OPTION 1 3: GND/ADJ 2 VOUT 3 VIN PACKING U: Tape & Reel Package Type Typical Application [Note 4]: Type of COUT IO VIN VIN G1084 VOUT GND/ADJ VOUT Top View C1 220F R1 R2 COUT 220F 1 2 3 TO-252TO-263 Ver: 1.1 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw 1 Global Mixed-mode Technology Inc. Absolute Maximum Ratings (Note 1) Input Voltage................................................7V Power Dissipation Internally Limited (Note 2) Maximum Junction Temperature........................150C Storage Temperature Range.........-65C TJ +150C Reflow Temperature (soldering, 10sec)............260C Thermal Resistance Junction to Ambient TO-252(1)................................................125C/W TO-263(1).................................................100C/W Thermal Resistance Junction to Case TO-252............................................10C/W TO-263........................................................6C/W ESD Rating (Human Body Model)...........................2kV Note (1): See Recommended Minimum Footprint G1084 (Note 1) (VIN-VADJ) Voltage....................................2.5V~5.5V Temperature Range..........................-40CTA 85C Operating Conditions Electrical Characteristics Operating Conditions: VIN 5.5V, TA =TJ = 25C unless otherwise specified. [Note3] PARAMETER Reference Voltage Line Regulation Load Regulation Dropout Voltage Current Limit Adjust Pin Current Change Minimum Load Current Quiescent Current Ripple Rejection Temperature Stability RMS Output Noise (% of VOUT) Thermal Shutdown Thermal Shutdown Hysteresis CONDITION VIN - VOUT = 2V, IOUT = 10mA (VOUT + 1.5V) < VIN < 5.5V, IOUT = 10mA (VIN - VOUT) = 2V, 10mA < IOUT <5A VOUT = 2%, IOUT = 5A (VIN - VOUT) = 2V VIN - VOUT = 2V, 10mA < IOUT < 5A 1.5V < (VIN - VOUT) < 5.25V VIN - VOUT = 2V f = 120Hz, COUT = 10F Tantalum, (VIN - VOUT) = 3V, IOUT = 1A VIN = 4V, IO =10mA TA = 25C, 10Hz < f < 10kHz, ILOAD = 10mA Junction Temperature MIN 1.225 ----------10 ------------- TYP 1.250 0.5 0.04 1.3 5.4 0.15 --80 45 0.3 0.007 150 30 MAX 1.275 1 0.5 1.5 ------150 ----------- UNIT V % % V A A mA A dB % % C 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, JA, and ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is Tjmax-TA / JA. If this dissipation is exceeded, the die temperature will rise above 150C 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. Ver: 1.1 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw 2 Global Mixed-mode Technology Inc. Definitions Output Voltage The G1084 provides an adjustable output voltage from 1.25V to 5V. with two external resistors. It can be formulated as: VOUT = 1.25V x (1+ IADJ = 80A (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. R2 R1 G1084 ) + IADJ x R2 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. 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. 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. Ver: 1.1 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw 3 Global Mixed-mode Technology Inc. Typical Performance Characteristics (VIN-VOUT = 3V, VOUT = 1.25V, CIN = 220F, COUT = 220F, TA=25C, unless otherwise noted.) G1084 Load Transient Response Line Transient Response Short Circuit-Current Output Noise Ripple Rejection 70 60 1.275 1.270 1.265 Line Regulation Ripple Rejection (dB) 50 625mA 40 30 20 10 0 10 100 1000 10000 100000 1000000 1.260 1A VOUT (V) 1.255 1.250 1.245 1.240 1.235 1.230 1.225 2.5 3 T = 25C T = -25C (VIN-VOUT)>Vdropout Vripple<0.5VP-P COUT = 220F 3.5 4 4.5 5 5.5 6 Frequency (Hz) VIN (V) Ver: 1.1 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw 4 Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) Dropout Voltage vs. IOUT 2 G1084 Load Regulation 5 T = 25C Output Voltage Deviation (mV) 3 IL = 10mA~2.5A Dropout Voltage (V) 1.5 1 VIN = 3V -1 VIN = 5V 1 0.5 -3 0 0 1 2 -5 IOUT (A) 3 4 -50 -30 -10 10 30 50 70 Temperature (C) Output Voltage vs. Temperature 1.255 Adj Pin Current vs. Temperature 100 90 1.253 VIN = 5V Adj Pin Current (A) 1.250 80 70 60 50 40 30 VIN = 3V VIN = 5V VOUT (V) 1.248 VIN = 3V 1.245 1.243 IL = 2.5A = 2.5A IL 1.240 -50 -30 -10 10 30 50 70 -50 -30 -10 10 30 50 70 Temperature (C) Temperature (C) G1084T43(TO-252) Max. Power Dissipation vs. PCB Top Copper Area TAMB = 25C ; Still Air 4 3.5 4 3.5 3 2.5 2 1.5 1 0.5 0 G1084T43(TO-252) Max. Power Dissipation vs. TAMB (still air) ( Different PCB Top Copper Area ) Unit : in 2 A=0.1 Max. Dissipation Power (W) Max. Dissipation Power (W) A=0.2 A=0.3 A=0.4 A=0.5 A=1.0 A=1.5 A=2.0 A=2.5 A=3.0 A=3.5 A=4.0 A=4.5 A=5.0 3 2.5 2 1.5 1 0.5 0 0 1 2 3 4 5 25 35 45 55 65 75 85 PCB Top Copper Area (in2) TAMB (C) Ver: 1.1 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw 5 Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) G1084T53(TO-263) Max. Power Dissipation vs. PCB Top Copper Area TAMB = 25C ; Still Air 4.5 4.5 4 4 3.5 3 2.5 2 1.5 1 0.5 0 0.5 1.5 2.5 3.5 4.5 25 35 45 55 65 75 G1084 G1084T53(TO-263) Max. Power Dissipation vs. TAMB (still air) ( Different PCB Top Copper Area ) Unit : in 2 A=0.5 A=1.0 A=1.5 A=2.0 A=2.5 A=3.0 A=3.5 A=4.0 A=4.5 A=5.0 Max. Dissipation Power (W) 3.5 3 2.5 2 1.5 1 0.5 0 Max. Dissipation Power (W) 85 PCB Top Copper Area (in2) TAMB (C) Recommend Minimum Footprint Ver: 1.1 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw 6 Global Mixed-mode Technology Inc. Package Information E E1 L1 G1084 A F D H L2 b e1 e A1 L3 C TO-252 (T4) Package SYMBOL A A1 b C D E E1 e e1 F L1 L2 L3 H MILLIMETER MIN. 2.19 0.89 0.64 0.46 5.97 6.35 5.21 2.26BSC 3.96 0.46 0.89 0.64 2.40 9.40 0 5.18 0.58 2.03 1.02 2.80 10.40 4 0.156 0.018 0.035 0.025 0.095 0.370 0 INCH MAX. 2.38 1.27 0.89 0.58 6.22 6.73 5.46 MIN. 0.086 0.035 0.025 0.018 0.235 0.250 0.205 0.09BSC MAX. 0.094 0.050 0.035 0.023 0.245 0.265 0.215 0.204 0.023 0.080 0.040 0.110 0.410 4 Ver: 1.1 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw 7 Global Mixed-mode Technology Inc. E A A1 L3 G1084 D H L1 C e L2 e1 b b1 A2 L TO-263 (T5) Package MILLIMETER MIN 4.30 1.22 2.45 0.69 1.22 0.36 8.64 9.70 2.29 4.83 14.60 4.70 1.20 2.24 1.40MAX SYMBOL A A1 A2 b b1 C D E e e1 H L L1 L2 L3 INCH MAX 4.70 1.32 2.69 0.94 1.40 0.56 9.652 10.54 2.79 5.33 15.78 5.84 1.778 2.84 MIN 0.169 0.048 0.104 0.027 0.048 0.014 0.340 0.382 0.090 0.190 0.575 0.185 0.047 0.088 0.055MAX MAX 0.185 0.055 0.106 0.037 0.055 0.022 0.380 0.415 0.110 0.210 0.625 0.230 0.070 0.111 Taping Specification PACKAGE TO-252 TO-263 Feed Direction TO-252 Package Orientation Feed Direction TO-263 Package Orientation Q'TY/REEL 2,500 ea 1,000 ea 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. Ver: 1.1 Sep 20, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw 8 |
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