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| www..com 1.2V Output - 1A Low Dropout Linear Regulator AX1212 1.2V Output - 1A Low Dropout Linear Regulator Features - Fixed 1.2V + 2% output voltage - 1.4V maximum dropout at full load current - Fast transient response - Output current limiting - Built-in thermal shutdown - Good noise rejection - Pb-Free Packages: SOT223, TO252, Applications - PC peripheral - Communication General Description AX1212 is a low dropout positive 1.2V output regulator with minimum of 1A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications. AX1212 is also well suited for other applications such as VGA cards. AX1212 is guaranteed to have lower than 1.4V dropout at full load current making it ideal to provide well-regulated outputs of 1.2V with 2.6V to 12V input supply. Ordering Information Typical Circuit VIN+3.3V AX1212 3 C1 10uF VIN VOUT GND 2 1 C2 10uF Vout=1.2V 1/7 Axelite Confidential Materials, do not copy or distribute without written consent Rev.1.3 Feb.22, 2008 www..com 1.2V Output - 1A Low Dropout Linear Regulator AX1212 Connection Diagram 3 PIN SOT223 ( Top View ) 3 2 1 Tab is Vout Vin Vout GND 3 PIN TO252 ( Top View ) 3 2 1 Tab is Vout Vin Vout GND Marking Information (1) SOT223-3L (Top view) (2) TO252-3L (Top view) AX1212 XX XX AX1212 ID Code XXth Week: 01~52 Year: 7=2007 A=2010 XXXX X ID Code XXth Week: 01~52 Year: 07 = 2007 Block Diagram Vin 3 2 Vout + + CURRENT LIMIT 1.2V + + Thermal Shutdown - 1 GND 2/7 Axelite Confidential Materials, do not copy or distribute without written consent Rev.1.3 Feb.22, 2008 www..com 1.2V Output - 1A Low Dropout Linear Regulator AX1212 Pin Descriptions NAME I/O PIN # FUNCTION GND I 1 A resistor divider from this pin to the Vout pin and ground sets the output voltage. (Ground only for Fixed-Mode) The output of the regulator. A minimum of 10uF capacitor (0.1 ESR 20) must be connected from this pin to ground to insure stability. The input pin of regulator. Typically a large storage capacitor (0.10 ESR 20) is connected from this pin to ground to insure that the input voltage does not sag below the minimum dropout voltage during the load transient response. This pin must always be 1.4V higher than Vout in order for the device to regulate properly. Vout O 2 Vin I 3 Absolute Maximum Ratings Symbol Parameter Rating Unit Vin TOP TMJ DC Supply Voltage Operating Junction Temperature Range Maximum junction Temperature Power Dissipation(No heat sink ;No air flow) TA=25 C, TJ=125 C o o -0.3 to 12 0 to +125 150 V oC oC mW PD SOT-223 TO-252 850 1050 -65 to +150 oC TST Storage Temperature 3/7 Axelite Confidential Materials, do not copy or distribute without written consent Rev.1.3 Feb.22, 2008 www..com 1.2V Output - 1A Low Dropout Linear Regulator AX1212 Electrical Characteristics (Under Operating Conditions) PARAMETER Operation Input Voltage Output Voltage o IOUT = 10mA, 2.6VVIN12V, TJ = 25 C CONDITIONS MIN 2.6 1.175 TYP 1.20 1.2 1.8 MAX 12 1.225 3.6 6 12 UNIT V V mV mV mV V A IOUT = 10mA, 2.6VVIN7V, TJ=25oC(Note 1,2) Line Regulation o IOUT = 10mA, 2.6VVIN12V, TJ=25 C(Note 1,2) Load Regulation Dropout Voltage (VIN-VOUT) Current Limit Minimum Load Current Ripple Rejection Temperature Stability VIN=2.6V, 10mA 1.3 1. 1 5 60 0.5 1.4 10 70 mA dB % F=120Hz,COUT=25uF Tantalum, IOUT=1A,VIN=5V IO=10mA SOT-223 TO-252 JA Thermal Resistance Junction-to-Ambient(No heat sink ;No air flow) JA Thermal Resistance Junction-to-Ambient (Note 4) 117 92 O C/W SOT-223 TO-252 75 55 O C/W JC Thermal Resistance SOT-223 TO-252 Junction-to-Case 15 10 O C/W Note1: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead = 1/18" from the package. Note2: Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the difference between input and output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range. Note3: Quiescent current is defined as the minimum output current required in maintaining regulation. At 12V input/output differential the device is guaranteed to regulate if the output current is greater than 10mA. Note4: Output is connected to the multi-layer PCB cupper area 10mm*10mm separately. If you need large PD or lower Tc & Tj, please connect to the large cupper area >>10mm*10mm. 4/7 Axelite Confidential Materials, do not copy or distribute without written consent Rev.1.3 Feb.22, 2008 www..com 1.2V Output - 1A Low Dropout Linear Regulator AX1212 Typical Performance Characteristics 2. 0 1. 8 0.20 Output Voltage Deviation (%) 1. 6 0 I load=800mA Dropout Voltage (V) 1. 4 1. 2 1. 0 0. 8 0. 6 0. 4 0. 2 0 0 Tj = 125 oC Tj = 25 oC -0.20 -0.40 -0.80 Dropout Voltage vs Output Current 2 1.5 1 Output Current (mA) 250 500 750 1000 -1 -25 0 Temperature (oC) 25 50 75 100 125 Load Regulation vs Temperature Output Voltage Change (%) 1 0. 5 0 -0.5 -1 -1.5 -2 -50 -25 0 25 50 75 100 125 150 0.8 Output Voltage Deviation (%) 0.6 0.4 0.2 0 Percent Change in Output Voltage vs Temperature Output Voltage Deviation (mV) Input Voltage (V) Load Current (A) Output Voltage Deviation (mV) 7.5 6.5 5.5 40 20 0 -20 -40 Cin=1uF Cout=10uF Tantalum 30 20 10 0 -10 -20 2 1 0 -1 0 10 20 Temperature (oC) 2 4 Line Regulation C in = 1uF C out = 10 uF Tantalum Preload = 100mA Input Voltage (V) 6 8 10 12 0 20 40 60 TIME (us) 80 100 120 140 160 180 200 30 TIME (us) 40 50 60 70 80 90 100 Line Transient Response Load Transient Response 5/7 Axelite Confidential Materials, do not copy or distribute without written consent Rev.1.3 Feb.22, 2008 www..com 1.2V Output - 1A Low Dropout Linear Regulator AX1212 Package Dimension (1) SOT223 D B1 1.9 3.3 e e1 1.6 K 1.2 2.3 Land Pattern Recommendation (Unit: mm) A A1 B L Seating Plane Symbol Dimensions In Millimeters Min. Nom. Max. Dimensions In Inches Min. Nom. Max. A A1 B B1 C D E H L K e e1 1.50 0.02 0.60 2.90 0.28 6.30 3.30 6.70 0.91 1.50 1.65 0.05 0.70 0.30 6.50 3.50 7.00 1.00 1.75 2.3 Basic 4.6 Basic 1.80 0.08 0.80 3.15 0.32 6.70 3.70 7.30 1.10 2.00 0.059 0.001 0.024 0.114 0.011 0.248 0.130 0.264 0.036 0.059 0.065 0.002 0.028 0.012 0.256 0.138 0.276 0.039 0.069 0.091 Basic 0.181 Basic 0.071 0.003 0.031 0.124 0.013 0.264 0.146 0.287 0.043 0.079 c 6.4 HE 6/7 Axelite Confidential Materials, do not copy or distribute without written consent Rev.1.3 Feb.22, 2008 www..com 1.2V Output - 1A Low Dropout Linear Regulator AX1212 Package Dimension (Continued) (2) TO252 5.6 E b2 L2 5.6 11.0 2.25 2.0 7.2 1.2 H C1 L SEATING PLANE L1 D b e1 e Land Pattern Recommendation (Unit: mm) A1 C Symbol A A1 b b2 C C1 D E e e1 H L L1 L2 Dimensions In Millimeters Min. Nom. Max. 2.18 2.29 2.40 0.89 1.14 0.61 TYP. 5.20 5.35 5.50 0.45 0.52 0.58 0.45 0.52 0.58 5.40 5.57 6.20 6.35 6.58 6.80 2.28 BSC. 4.57 BSC. 9.00 9.70 10.40 0.51 0.64 0.83 1.02 0.88 1.27 Dimensions In Inches Min. Nom. Max. 0.086 0.090 0.094 0.035 0.045 0.024 TYP. 0.205 0.211 0.217 0.018 0.020 0.023 0.018 0.020 0.023 0.213 0.219 0.244 0.250 0.259 0.268 0.090 BSC. 0.180 BSC. 0.354 0.382 0.409 0.020 0.025 0.033 0.040 0.035 0.050 A 7/7 Axelite Confidential Materials, do not copy or distribute without written consent Rev.1.3 Feb.22, 2008 |
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