AIC1085 3A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR SPEC NO: DS-1085-01 FEB 02, 01 n FEATURES l l l n DESCRIPTION Dropout Voltage 1.3V at 3A Output Current. Fast Transient Response. Extremely Tight Line and Load Regulation. l Internal Thermal and Current Limiting. Adjustable Output Voltage or Fixed 1.5V, 1.8V, 3.3V. l Standard 3-Pin Power Packages. l 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 n APPLICATIONS microprocessor applications. Internal current and l Mother Board I/O Power Supplies. Microprocessor Power Supplies. High Current Regulator. l Post Regulator for Switching Supply. l l thermal limiting provides protection against any overload condition that would create excessive junction temperatures. n TYPICAL APPLICATION CIRCUIT 3 VIN 5V C1 + 10µF AIC1085 2 1 ADJ VOUT 3.3V RF1 125Ω 1% + C2 RF2 10µF 205Ω 1% VREF VR E F=VOUT - VADJ =1.25V (typ.) VOUT =VREF x (1+RF2/RF1)+ IADJ x RF2 IADJ =55µA (typ.) (1) C1 needed if device is far away from filter capacitors. (2) C2 required for stability. Adjustable Voltage Regulator 3 VIN 5V C1 + 10µF AIC1085-33 2 1 VOUT 3.3V + C2 10µF GND Fixed Voltage Regulator ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C. 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 ORDER NUMBER PACKAGING TYPE E: TO-252 M: TO-263 T: TO-220 AIC1085CE (TO-252) PIN CONFIGURATION FRONT VIEW 1: ADJ (GND) 2: VOUT (TAB) 3: VIN 1 2 3 1 2 3 1 2 3 TEMPERATURE RANGE C: 0°C~70°C AIC1085CM (TO-263) OUTPUT VOLTAGE DEFAULT: ADJ. 15: 1.5V 18: 1.8V 33: 3.3V AIC1085CT (TO-220) FRONT VIEW 1: ADJ (GND) 2: VOUT (TAB) 3: VIN FRONT VIEW 1: ADJ (GND) 2: VOUT (TAB) 3: VIN n ABSOLUTE MAXIMUM RATINGS Vin pin to ADJ/ GND pin .......................… … ...............… … … … … .......................... 7V ..................… … … ...................... 0°C~ 125° C Operating Junction Temperature Range Storage Temperature Range ...............................… … … … ................. - 65° C ~ 150° C Thermal Resistance Junction to Case TO-252 … … … … … … … … .… … … … … 15°C/W TO-263, TO-220 … … … . ...........… … … ... 6°C /W Thermal Resistance Junction to Ambient TO-252 … … … … … … … … … … ..… 100°C/W (Assume no ambient airflow, no heatsink) TO-263 … . ....… … .....… … … … … ... 60°C /W TO-220 … . ...… … ....… … … … … … .. 50°C /W Lead Temperature (Soldering) 10 sec. .....................… … … ............… … ..… .......260°C n TEST CIRCUIT Refer to TYPICAL APPLICATION CIRCUIT. ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C. 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 (V IN=5V, TA=25°C, IO=10mA, Unless otherwise specified) PARAMETER Reference Voltage (V OUT -V ADJ ) Output Voltage Line Regulation TEST CONDITIONS MIN. TYP. MAX. TA=25°C 1.238 1.25 1.262 AIC1085-15 VIN=5V 1.48 1.50 1.52 AIC1085-18 VIN=5V 1.78 1.80 1.82 AIC1085-33 VIN=5V 3.26 3.30 3.34 AIC1085 (Adj.) Adj : 2.75V≤ VIN ≤5.25V V V % Fix : VOUT+1V≤ VIN ≤7V 0.015 TA=25° C Load Regulation UNIT 10mA < IO < 3A TA=25°C 0.2 0.6 % 1.4 V ∆VOUT, ∆VREF =1% Dropout Voltage 10mA ≤ IO ≤3A 1.3 0°C ≤TJ ≤125°C Current Limit Adjusted Pin Current (IADJ) Adjusted Pin Current Change (∆IADJ) VIN = 5V 0°C ≤TJ ≤125° C 3 2.75V ≤ VIN ≤ 7V 2.75V ≤ VIN ≤ 7V 0°C ≤TJ ≤125° C IO=0.5A 4 A 55 120 µA 0.2 5 µA Temperature Stability 0°C ≤TJ ≤125° C 0.5 Minimum Load Current 0°C ≤TJ ≤125°C 5 RMS Output Noise (% of VOUT) 10Hz ≤ f ≤ 10KHz % 10 mA 0.003 % 72 dB 120Hz input ripple Ripple Rejection Ratio COUT=25µF 60 (V IN -V OUT)=3V ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C. 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 Current Limit 55 µA VOUT For fixed voltage device GND ADJ n PIN DESCRIPTIONS ADJ PIN - (GND PIN - Providing VREF=1.25V (typ.) for adjustable VOUT. VREF =VOUT-V ADJ and IADJ=55µA (typ.) VOUT PIN - Adjustable output voltage. VIN PIN Power Input. - Power Ground.) ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C. 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 PERFORMANCE CHARACTERISTICS Load Transient Response Line Transient Response Output Voltage (mV, AC) Output Voltage (V, AC) 0.1 0.05 0 -0.05 V IN =5V CIN=1µ F COUT=10 µF (Tantalum) V OUT=3.3V 1.5A 0.1A 0 40 80 120 160 0 --50 COUT=10 µF (Tantalum) VOUT=3.3V --100 Input Voltage (V) Load Current -0.1 50 7.0 6.0 0 200 10 20 Time ( µS) Dropout Voltage (VOUT=3.3V) Minimum Operating Current (mA) Minimum Differential Voltage (V) 1.20 1.18 1.16 1.14 1.12 1.10 1.08 1.06 0.5 1.0 1.5 40 50 Minimum Operating Current 1.22 0.0 30 Time (µ S) 2.0 2.5 3.0 Output Current (A) 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 1 2 3 4 5 Differential Voltage (V) ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C. 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 Φ3.81±0.27 F D SYMBOL MIN MAX A 3.56 4.82 D 14.23 16.51 E 9.66 10.66 e 2.29 2.79 e1 0.50 1.15 e2 - 1.10 F 0.51 1.39 J1 2.04 2.92 L 12.70 14.73 L e1 J1 e l e2 TO-252 (unit: mm) E C1 b2 A D H L b e A1 SYMBOL MIN MAX A 2.19 2.38 A1 1.02 1.27 b 0.64 0.88 b2 5.21 5.46 C1 0.46 0.58 D 5.33 5.59 E 6.35 6.73 e 2.28 (TYP.) H 9.40 10.42 L 0.51 - ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C. 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 C2 L2 L D L1 MIN MAX A 4.06 4.83 b 0.50 1.00 b2 1.14 1.40 C - 0.7 c2 1.14 1.40 D 8.63 9.66 E 9.65 10.29 e e b2 SYMBOL C b 2.54 (TYP.) L 14.60 15.88 L1 2.28 2.80 L2 - 1.40 UNIT: mm ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based IndustrialPark , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510 7