AIC1084 AIC | Alldatasheet

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5A Low Dropout Positive Adjustable Regulator Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC www.analog.com.tw DS-1084-03 Sep 21, 01 TEL: 886-3-5772500 FAX: 886-3-5772510 1 n FEATURES l Dropout Voltage 1.3V at 5A Output Current. l Fast Transient Response. l Extremely Tight Line and Load Regulation. l Current Limiting and Thermal Protection. l Adjustable Output Voltage or Fixed 1.5V, 1.8V, 3.3V. l Standard 3-Pin Power Packa ges. n APPLICATIONS l Mother Board I/O Power Supplies. l Microprocessor Power Supplies. l High Current Regulator. l Post Regulator for Switching Supply. n DESCRIPTION The AIC108 4 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 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. n TYPICAL APPLICATION CIRCUIT 10µF VOUT 3.3V VIN VREF RF2 205Ω ADJ AIC1084 10µF

1 RF1

125Ω VREF =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 10µF VOUT 3.3V VIN GND 10µF AIC1084-33 2 Fixed Voltage Regulator

ORDER NUMBER PIN CONFIGURATION PACKAGING TYPE E: TO-252 M: TO-263 T: TO-220 MA: TO-263AA FRONT VIEW 1: ADJ (GND) 2: VOUT (TAB) 3: VIN AIC1084CM (TO-263) 2 31 FRONT VIEW 1: ADJ (GND) 2: VOUT (TAB) 3: VIN AIC1084CE (TO-252) 2 31 FRONT VIEW 1: ADJ (GND) 2: VOUT (TAB) 3: VIN AIC1084CT (TO-220) 1 2 3 AIC1084-XXCX OUTPUT VOLTAGE DEFAULT: ADJ. 15: 1.5V 18: 1.8V 33: 3.3V FRONT VIEW 1: ADJ (GND) 2: VOUT (TAB) 3: VIN AIC1084CMA (TO-263AA) 2 31 n ABSOLUTE MAXIMUM RATINGS Thermal Resistance Junction to Ambient TO-252 ………………………… ..… 100°C/W

Refer to TYPICAL APPLICATION CIRCUIT. n ELECTRICAL CHARACTERISTICS (VIN=5V, TJ=25°C, IO=10mA, Unless otherwise specified) PARAMETER TEST CONDITIONS MIN. TYP. MAX. UNIT Reference Voltage AIC1084 (ADJ) TJ=25°C 1.238 1.25 1.262 V Output Voltage AIC1084-15 VIN=5V AIC1084-18 VIN=5V AIC1084-33 VIN=5V 1.48 1.78 3.26 1.50 1.80 3.30 1.52 1.82 3.34 V Line Regulation ADJ : 2.65V≤ VIN ≤ 7V VOUT=1.25V Fix : VOUT+1.4V≤ VIN ≤ 7V TJ=25°C 0.015 0.2 % Load Regulation 10mA < IO < 5A TJ=25°C 0.6 % Dropout Voltage Δ VOUT, Δ VREF=1% 10mA ≤ IO ≤ 5A 0°C ≤ TJ ≤ 125°C 1.3 1.4 V Current Limit 0°C ≤ TJ ≤ 125°C 5 6 A Adjusted Pin Current 2.65V ≤ VIN ≤ 7V 55 120 µA Adjusted Pin Current Change (Δ IADJ) 2.65V ≤ VIN ≤ 7V 0°C ≤ TJ ≤ 125°C 0.2 5 µA Temperature Stability IO=0.5A Minimum Load Current 0°C ≤ TJ ≤ 125°C 5 10 mA RMS Output Noise (% of V OUT) 10Hz ≤ f ≤ 10KHz 0.003 % Ripple Rejection Ratio 120Hz input ripple COUT=25µF (VIN -VOUT)=3V 60 72 dB

55µA ADJ VREF 1.25V GM Thermal Limit Current Amp. VOUT GND For fixed voltage device Current Limit n PIN DESCRIPTIONS ADJ PIN - Providing VREF=1.25V (typ.) for adjustable V OUT. VREF=VOUT-VADJ and IADJ=55 µA (typ.) GND PIN- Power ground. VOUT PIN - Adjustable output voltage. VIN PIN - Power Input. n TYPICAL PERFORMANCE CHARACTERISTICS Fig. 1 Load Transient Response Time (µS) Output Voltage (V, AC) Load Current 0 20 40 60 80 100 0.1A 2.5A -0.4 -0.2 0.2 0.4 VIN=5.0V CIN=1µF(Tantalum) COUT=10µF(Tantalum) VOUT=3.3V Fig. 2 Line Transient Response Time ( µS) Output Voltage (mV, AC) Input Voltage (V) 0 40 80 120 160 200 6.0 7.0 -100 -50 CIN=1µF (Tantalum) COUT=10µF (Tantalum) VOUT=3.3V

n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Fig. 3 Dropout Voltage (VOUT=3.3V) Output Current (A) Minimum differential Voltage (V) 0 1 2 3 4 5 1.05 1.10 1.15 1.20 1.25 1.30 1.35 Fig. 4 Minimum Operating Current Differential Voltage (V) Minimum Operating Current (mA) 0 1 2 3 4 5 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 1 2 3 4 5 6 7 8 9 Fig. 5 Minimum Operating Current Minimum Operating Current (mA) Differential Voltage (V) 1 2 3 4 5 6 70 Fig. 6 AIC1084 (ADJ.) Short Circuit Current Short Circuit Current (A) VIN-VOUT (V) 101 102 103 104 105 106 107 -80 -70 -60 -50 -40 -30 -20 Fig. 7 AIC1084 (ADJ.) Ripple Rejection COUT=3.3µF Ripple Rejection Ratio (dB) Frequency (Hz) COUT=10µF COUT=25µF

l TO-220 (unit: mm) 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 E D e Φ 3.81±0.27 A F L