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| AIC1085 3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR SPEC NO: DS-1085-01 FEB 02, 01 n FEATURES l l l l l n DESCRIPTION The AIC1085 is a low dropout three terminal regulator with 3A output current capability. The output voltage is adjustable with the use of a resistor divider or fixed 1.5V, 1.8V, and 3.3V. Dropout is guaranteed at a maximum of 1.4V at maximum output current. Its low dropout voltage and fast transient response make it ideal for low voltage microprocessor applications. Internal current and thermal limiting provides protection against any overload condition that would create excessive junction temperatures. Dropout Voltage 1.3V at 3A Output Current. Fast Transient Response. Extremely Tight Line and Load Regulation. Internal Thermal and Current Limiting. Adjustable Output Voltage or Fixed 1.5V, 1.8V, 3.3V. Standard 3-Pin Power Packages. l n APPLICATIONS l l l l Mother Board I/O Power Supplies. Microprocessor Power Supplies. High Current Regulator. Post Regulator for Switching Supply. n TYPICAL APPLICATION CIRCUIT VIN 5V C1 + 10F 3 AIC1085 1 ADJ 2 VREF VOUT 3.3V RF1 125 1% + C2 RF2 10F 205 1% VR E F=VOUT - VADJ =1.25V (typ.) VOUT =VREF x (1+RF2/RF1)+ IADJ x RF2 IADJ =55A (typ.) (1) C1 needed if device is far away from filter capacitors. (2) C2 required for stability. Adjustable Voltage Regulator VIN 5V C1 + 10F 3 AIC1085-33 2 VOUT 3.3V 1 + C2 10F GND Fixed Voltage Regulator ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 1 AIC1085 3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR SPEC NO: DS-1085-01 FEB 02, 01 n ORDERING INFORMATION AIC1085-XXXX PACKAGING TYPE E: TO-252 M: TO-263 T: TO-220 ORDER NUMBER AIC1085CE (TO-252) PIN CONFIGURATION FRONT VIEW 1: ADJ (GND) 2: VOUT (TAB) 3: VIN 1 2 3 TEMPERATURE RANGE C: 0C~70C OUTPUT VOLTAGE DEFAULT: ADJ. 15: 1.5V 18: 1.8V 33: 3.3V AIC1085CM (TO-263) FRONT VIEW 1: ADJ (GND) 2: VOUT (TAB) 3: VIN 1 2 3 AIC1085CT (TO-220) FRONT VIEW 1: ADJ (GND) 2: VOUT (TAB) 3: VIN 1 2 3 n ABSOLUTE MAXIMUM RATINGS Vin pin to ADJ/ GND pin .......................... ... .................. ... ... ... ... .......................... 7V Operating Junction Temperature Range ..................... ... ... ...................... 0C~ 125C Storage Temperature Range .................................. ... ... ... ................. - 65C ~ 150C Thermal Resistance Junction to Case TO-252 ... ... ... ... ... ... ... ... .... ... ... ... ... 15C/W TO-263, TO-220 ... ... ... ............... ... ... ... 6C /W Thermal Resistance Junction to Ambient TO-252 ... ... ... ... ... ... ... ... ... ... ..... 100C/W (Assume no ambient airflow, no heatsink) TO-263 ... ........ ... ........ ... ... ... ... ... 60C /W TO-220 ... ....... ... ....... ... ... ... ... ... .. 50C /W Lead Temperature (Soldering) 10 sec. ........................ ... ... ............... ... ..... .......260C n TEST CIRCUIT Refer to TYPICAL APPLICATION CIRCUIT. ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 2 AIC1085 3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR SPEC NO: DS-1085-01 FEB 02, 01 n ELECTRICAL CHARACTERISTICS specified) (V IN=5V, TA=25C, IO=10mA, Unless otherwise PARAMETER Reference Voltage (V OUT -V ADJ ) TEST CONDITIONS AIC1085 (Adj.) TA=25C AIC1085-15 VIN=5V AIC1085-18 VIN=5V AIC1085-33 VIN=5V Adj : 2.75V VIN 5.25V Fix : VOUT+1V VIN 7V TA=25C MIN. TYP. MAX. UNIT V 1.238 1.48 1.78 3.26 1.25 1.50 1.80 3.30 1.262 1.52 1.82 3.34 Output Voltage Line Regulation V % 0.015 0.2 Load Regulation 10mA < IO < 3A TA=25C VOUT, VREF =1% 10mA IO 3A 0C TJ 125C 0.6 % Dropout Voltage 1.3 1.4 V Current Limit Adjusted Pin Current (IADJ) Adjusted Pin Current Change (IADJ) Temperature Stability Minimum Load Current RMS Output Noise (% of VOUT) VIN = 5V 0C TJ 125C 2.75V VIN 7V 2.75V VIN 7V 0C TJ 125C IO=0.5A 0C TJ 125C 0C TJ 125C 10Hz f 10KHz 120Hz input ripple 3 4 55 0.2 120 5 A A A 0.5 5 0.003 10 % mA % Ripple Rejection Ratio COUT=25F (V IN -V OUT)=3V 60 72 dB ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 3 AIC1085 3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR SPEC NO: DS-1085-01 FEB 02, 01 n BLOCK DIAGRAM VIN Current Amp. + VREF + 1.25V - GM Thermal Limit 55 A Current Limit VOUT For fixed voltage device ADJ GND n PIN DESCRIPTIONS ADJ PIN Providing VREF=1.25V (typ.) for adjustable VOUT. VREF =VOUT-V ADJ and IADJ=55A (typ.) Power Ground.) VOUT PIN VIN PIN Adjustable output voltage. Power Input. (GND PIN - ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 4 AIC1085 3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR SPEC NO: DS-1085-01 FEB 02, 01 n TYPICAL 0.1 PERFORMANCE CHARACTERISTICS Load Transient Response Line Transient Response Output Voltage (mV, AC) V IN =5V CIN=1 F COUT=10 F (Tantalum) V OUT=3.3V 50 0 Output Voltage (V, AC) 0.05 0 -0.05 -0.1 --50 --100 COUT=10 F (Tantalum) VOUT=3.3V Input Voltage (V) Load Current 1.5A 7.0 0.1A 6.0 0 40 80 120 160 200 0 10 20 30 40 50 Time ( S) Time ( S) Dropout Voltage (VOUT=3.3V) 1.22 Minimum Operating Current Minimum Operating Current (mA) 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 1 2 3 4 5 Minimum Differential Voltage (V) 1.20 1.18 1.16 1.14 1.12 1.10 1.08 1.06 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Output Current (A) Differential Voltage (V) ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 5 AIC1085 3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR SPEC NO: DS-1085-01 FEB 02, 01 n PHYSICAL DIMENSIONS l TO-220 (unit: mm) A E F 3.810.27 SYMBOL A D E MIN 3.56 14.23 9.66 2.29 0.50 0.51 2.04 12.70 MAX 4.82 16.51 10.66 2.79 1.15 1.10 1.39 2.92 14.73 D e e1 e2 F J1 L L e1 J1 e e2 l TO-252 (unit: mm) E b2 C1 A SYMBOL A A1 b MIN 2.19 1.02 0.64 5.21 0.46 5.33 6.35 MAX 2.38 1.27 0.88 5.46 0.58 5.59 6.73 D b2 H C1 D E L e H L 2.28 (TYP.) 9.40 0.51 10.42 - b e A1 ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 6 AIC1085 3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR SPEC NO: DS-1085-01 FEB 02, 01 l TO-263 (unit: mm) E A SYMBOL A C2 MIN 4.06 0.50 1.14 1.14 8.63 9.65 MAX 4.83 1.00 1.40 0.7 1.40 9.66 10.29 L2 b b2 C L D L1 c2 D E e e C 2.54 (TYP.) 14.60 2.28 15.88 2.80 1.40 b2 b L L1 L2 UNIT: mm ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 7 |
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