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| AIC1084 5A Low Dropout Positive Regulator FEATURES Dropout Voltage 1.3V at 5A 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, 3.3V. Standard 3-Pin Power Packages. DESCRIPTION The AIC1084 is a low dropout three terminal regulator with 5A 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 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 limit and thermal protection provide 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 AIC1084 1 ADJ C1 + 10F 2 VREF VOUT 3.3V RF1 125 + 1% C2 RF2 10F 205 1% VREF=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 3 AIC1084-33 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-1084P-03 010405 1 AIC1084 ORDERING INFORMATION AIC1084-XXXXXX PACKING TYPE TB: TUBE TR: TAPING & REEL 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: AIC1084-15CETR 1.5V version in TO-252 Package & Taping & Reel Packing Type Example: AIC1084-15PMTR 1.5V version in TO-263 Lead Free Package & Taping & Reel Packing Type PIN CONFIGURATION 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 1 2 3 ABSOLUTE MAXIMUM RATINGS VIN pin to ADJ/GND pin Operating Temperature Range Maximum Junction Temperature Storage Temperature Range 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 125C - 65C ~ 150C 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 AIC1084 TEST CIRCUIT Refer to TYPICAL APPLICATION CIRCUIT. ELECTRICAL CHARACTERISTICS (VIN=5V, TJ=25C, IO=10mA, unless otherwise specified) (Note1) PARAMETER Reference Voltage TEST CONDITIONS AIC1084 (ADJ) AIC1084-15, VIN=5V AIC1084-18, VIN=5V AIC1084-25, VIN=5V AIC1084-33, 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 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 < 5A VOUT, VREF=1% 10mA IO 5A 5 1.3 6 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 AIC1084 TYPICAL PERFORMANCE CHARACTERISTICS 0.4 Output Voltage (V, AC) 0.2 0 -0.2 -0.4 Output Voltage (mV, AC) 50 0 -50 Input Voltage (V) Load Current VIN=5.0V CIN=1F(Tantalum) COUT=10F(Tantalum) VOUT=3.3V -100 CIN=1F (Tantalum) COUT=10F (Tantalum) VOUT=3.3V 7.0 6.0 2.5A 0.1A 0 20 40 60 80 100 0 40 80 120 160 200 Fig. 1 1.35 Time (S) Load Transient Response 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 Fig. 2 Time (S) Line Transient Response 1.30 1.25 1.20 1.15 1.10 1.05 Minimum Operating Current (mA) Minimum differential Voltage (V) 0 1 2 3 4 5 1 2 3 4 5 Fig. 3 5 Output Current (A) Dropout Voltage (VOUT=3.3V) 8 7 Differential Voltage (V) Fig. 4 Minimum Operating Current Minimum Operating Current (mA) 4 Short Circuit Current (A) 6 5 4 3 2 1 3 2 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 Differential Voltage (V) Fig. 5 Minimum Operating Current VIN-VOUT (V) Fig. 6 AIC1084 (ADJ.) Short Circuit Current 4 AIC1084 TYPICAL PERFORMANCE CHARACTERISTICS -20 (Continued) Ripple Rejection Ratio (dB) -30 -40 -50 -60 -70 -80 1 10 2 10 3 10 4 10 COUT=3.3F COUT=10F COUT=25F Frequency (Hz) 5 10 6 10 7 10 Fig. 7 AIC1084 (ADJ.) Ripple Rejection 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 AIC1084 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-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 A1 L2 L1 6 AIC1084 TO-263 (unit: mm) A E L1 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 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 L3 L VIEW B SEATING PLANE 7 |
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