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| AIC1085 3A Low Dropout Positive Regulator FEATURES Dropout Voltage 1.3V at 3A Output Current. Fast Transient Response. Extremely Tight Line and Load Regulation. Current Limiting and Thermal Protection. Adjustable Output Voltage or Fixed 1.5V, 1.8V, 2.5V and 3.3V. Standard 3-Pin Power Packages. 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, 2.5V and 3.3V. Dropout voltage is guaranteed to be at a maximum of 1.4V with the maximum output current. Its low dropout voltage and fast transient response make it ideal for low voltage microprocessor applications. Current limiting and thermal protection provides protection against any overload condition that would create excessive junction temperatures. APPLICATIONS Mother Board I/O Power Supplies. Microprocessor Power Supplies. High Current Regulator. Post Regulator for Switching Supply. TYPICAL APPLICATION CIRCUIT VIN 5V 3 AIC1085 1 ADJ C1 + 10F 2 VREF VOUT 3.3V RF1 125 + 1% C2 RF2 10F 205 1% VREF = VOUT - VADJ = 1.25V (typ.) RF2 VOUT = VREF x 1 + + I ADJ x RF2 RF1 I ADJ = 55 A (typ.) (1) C1 needed if device is far away from filter capacitors. (2) C2 required for stability. Adjustable Voltage Regulator VIN 5V 3 AIC1085-33 1 2 VOUT 3.3V C1 + 10F GND + C2 10F Fixed Voltage Regulator Analog Integrations Corporation Si-Soft Research Center 3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C. TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw DS-1085P-03 010405 1 AIC1085 ORDERING INFORMATION AIC1085-XXXXXX PIN CONFIGURATION PACKING TYPE TR: TAPE & REEL TB: TUBE PACKAGING TYPE E: TO-252 M: TO-263 T: TO-220 C: COMMERCIAL P: LEAD FREE COMMERCIAL OUTPUT VOLTAGE DEFAULT: ADJUSTABLE 15: 1.5V 18: 1.8V 25: 2.5V 33: 3.3V Example: AIC1085-15CETR 1.5V version in TO-252 Package & Taping & Reel Packing Type AIC1085-15PMTR 1.5V version in TO-263 Lead Free Package & Taping & Reel Packing Type TO-252 (CE&PE) TOP VIEW 1: ADJ (GND) 2: VOUT (TAB) 3: VIN 1 2 3 TO-263 (CM&PM) TOP VIEW 1: ADJ (GND) 2: VOUT (TAB) 3: VIN 1 2 3 TO-220 (CT&PT) FRONT VIEW 1: ADJ (GND) 2: VOUT (TAB) 3: VIN 123 ABSOLUTE MAXIMUM RATINGS VIN pin to ADJ/ GND pin Operating Temperature Range Storage Temperature Range Maximum Junction Temperature Lead Temperature (Soldering, 10 sec) Thermal Resistance Junction to Case TO-252 TO-263, TO-220 Thermal Resistance Junction to Ambient TO-252 TO-220 (Assume no ambient airflow, no heatsink) TO-263 7V -40C to 85C -65C to 150C 125C 260C 12.5C/W 3C /W 100C/W 60C /W 50C /W Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. 2 AIC1085 TEST CIRCUIT Refer to TYPICAL APPLICATION CIRCUIT. ELECTRICAL CHARACTERISTICS (VIN=5V, TJ=25C, IO=10mA, unless otherwise specified) (Note1) PARAMETER Reference Voltage (VOUT -VADJ) TEST CONDITIONS AIC1085 (ADJ) AIC1085-15, VIN=5V AIC1085-18, VIN=5V AIC1085-25, VIN=5V AIC1085-33, VIN=5V ADJ: 2.65V VIN 7V, VOUT=1.25V Fix : VOUT+1.4V VIN 7V Load Regulation Dropout Voltage Current Limit GND Current (Fix) Adjusted Pin Current (IADJ) Adjusted Pin Current Change (IADJ) Temperature Stability Minimum Load Current RMS Output Noise (% of VOUT) Ripple Rejection Ratio 10Hz f 10KHz 120Hz input ripple COUT=25F (VIN-VOUT)=3V 60 2.65V VIN 7V 2.65V VIN 7V 2.65V VIN 7V IO=0.5A 10mA < IO < 3A VOUT, VREF=1% 10mA IO 3A 3 1.3 4 11.5 55 0.2 0.5 5 0.003 72 10 14 120 5 0.6 1.4 % V A mA A A % mA % dB MIN. 1.238 1.48 1.78 2.47 3.26 TYP. 1.25 1.50 1.80 2.50 3.30 0.015 MAX. 1.262 1.52 1.82 2.53 3.34 0.2 UNIT V Output Voltage V Line Regulation % Note 1: Specifications are production tested at TA=25C. Specifications over the -40C to 85C operating temperature range are assured by design, characterization and correlation with Statistical Quality Controls (SQC). 3 AIC1085 TYPICAL PERFORMANCE CHARACTERISTICS 0.1 Output Voltage (V, AC) Output Voltage (mV, AC) 0.05 50 0 0 -0.05 -0.1 Input Voltage (V) Load Current VIN=5V CIN=1F COUT=10F (Tantalum) VOUT=3.3V --50 --100 CIN=1V (Tantalum) COUT=10F (Tantalum) VOUT=3.3V 1.5A 7.0 0.1A 6.0 0 40 80 120 160 200 0 10 20 30 40 50 Time (S) Fig. 1 Load Transient Response 1.22 Time (S) Fig. 2 Line Transient Response 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) Fig. 3 Dropout Voltage (VOUT=3.3V) 5 Minimum Operating Current (mA) 4 3 2 1 0 1 2 3 4 5 6 7 8 9 Differential Voltage (V) Fig. 4 Minimum Operating Current 4 AIC1085 BLOCK DIAGRAM VIN VREF + 1.25V + GM Current Amp. - Thermal Limit 55A Current Limit VOUT For fixed voltage device ADJ GND PIN DESCRIPTIONS ADJ PIN Providing VREF=1.25V (typ.) for adjustable VOUT. VREF=VOUT-VADJ and IADJ=55A (typ.) GND PIN -Power Ground. VOUT PIN VIN PIN Adjustable output voltage. Power Input. 5 AIC1085 PHYSICAL DIMENSIONS TO-220 (unit: mm) A E A1 S Y M B O L TO-220 MILLIMETERS MIN. 3.56 0.51 2.04 0.38 1.15 0.35 14.23 8.38 9.66 2.54 BSC 5.85 12.70 -3.54 2.54 6.85 14.73 6.35 4.08 3.42 MAX. 4.82 1.39 2.92 1.01 1.77 0.61 16.51 9.02 10.66 Q H1 A A1 D P A2 b WITH PLATING D1 b b2 c c D D1 L1 BASE METAL SECTION A-A L E e A A H1 L b2 e A2 L1 P Q TO-263 (unit: mm) E L1 A c2 S Y M B O L TO-263-3L MILLIMETERS MIN. 4.06 0.00 0.51 1.14 0.38 1.14 8.38 9.65 2.54 BSC 14.61 1.78 --0.25 BSC 0 8 15.88 2.79 1.68 1.78 MAX. 4.83 0.25 0.99 1.78 0.74 1.65 9.65 10.67 A D A1 H b b2 L2 c c2 D A b2 A e SEE VIEW B E e H b WITH PLATING c BASE METAL SECTION A-A L L1 L2 L3 GAUGE PLANE L A1 L3 VIEW B SEATING PLANE 6 AIC1085 TO-252 (unit: mm) E b3 L3 A c2 S Y M B O L TO-252-3L MILLIMETERS MIN. 2.19 0.00 0.64 4.95 0.46 0.46 5.33 6.35 2.28 BSC 9.40 1.40 2.67 REF 0.51 BSC 0.89 -0 2.03 1.02 8 10.41 1.78 MAX. 2.38 0.13 0.89 5.46 0.61 0.89 6.22 6.73 A A1 D b b3 H L4 c c2 A A SEE VIEW B D E e H e b WITH PLATING c L L1 BASE METAL SECTION A-A L2 L3 L4 GAUGE PLANE SEATING PLANE L VIEW B Note: Information provided by AIC is believed to be accurate and reliable. However, we cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AIC product; nor for any infringement of patents or other rights of third parties that may result from its use. We reserve the right to change the circuitry and specifications without notice. Life Support Policy: AIC does not authorize any AIC product for use in life support devices and/or systems. Life support devices or systems are devices or systems which, (I) are intended for surgical implant into the body or (ii) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. A1 L2 L1 7 |
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