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| @vic AV1086 LINEAR INTEGRATED CIRCUIT 1.5A ADJUSTABLE/FIXED LOW DROPOUT LINEAR REGULATOR 1 1 DESCRIPTION The @vic AV1086 and AV1086-1.8V,2.5V, 2.85V, 3.3V and 5V are low dropout three-terminal regulators with 1.5A output current capability. These devices have been optimized for low voltage where transient response and minimum input voltage are critical. The 2.85V version is designed specifically to be used in Active Terminators for SCSI bus. Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload and ambient temperatures that would create excessive junction temperatures. Unlike PNP type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent current of the UZ1086 flows into the load, increasing efficiency. TO-263 TO-263-3 1 TO-220 1 1 TO-252 SOT-223 2: VOUT 3: VIN 1: ADJ/GND FEATURES *Low dropout voltage *Load regulation: 0.05% typical *Trimmed current limit *On-chip thermal limiting *Three-terminal adjustable or fixed 1.8V, 2.5V, 2.85V, 3.3V, 5V APPLICATIONS *Active SCSI terminators *High efficiency linear regulators *Post regulators for switching supplies *Battery charges *5V to 3.3V linear regulators *Motherboard clock supplies QW-R102-008,D @vic AV1086 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATIONS AV1086 VIN=3.3V VIN + 10F ADJ VOUT R1 124 + 22F 1.5V at 1.5A VOUT=VREF(1+R2/R1)+IAdj*R2 R2 24.9 VIN=5V VIN + 10F AV1086-2.85 VOUT GND 2.85V at 1.5A + 22F ABSOLUTE MAXIMUM RATINGS (Ta=25C, unless otherwise specified) PARAMETER VIN Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering,10 sec) MIN 0 -65 MAX 7.5 125 150 300 UNIT V C C C ELECTRICAL CHARACTERISTICS (VIN7V, TJ=25C, unless otherwise specified. The*denotes specifications which apply over the specified operating temperature range.) PARAMETER Reference Voltage (note 3) Output Voltage SYMBOL VREF * TEST CONDITIONS 1.5V(VIN - VOUT ) 5.75V 10mAIOUT1A 10mAIOUT1A UZ1086-1.8V 3.3VVIN7V UZ1086-2.5 4VVIN 7V UZ1086-2.85 4.35VVIN 7V UZ1086-3.3 4.8VVIN 7V UZ1086-5.0 6.5VVIN 7V (VOUT+1.5V)VIN 7V, IOUT=10mA VIN - VOUT =2V, 10mAIOUT1A VREF =1%,IOUT=1.5A VIN - VOUT =2V MIN 1.225 TYP 1.25 MAX 1.275 UNIT V * * * * Line Regulation (note1,2) Load Regulation (note1,2) Dropout Voltage Current Limit Adjust Pin Current (note 3) Adjust Pin Current Change (note3) Minimum Load Current Quiescent Current * * * * * * * * 1.764 2.450 2.793 3.234 4.900 1.80 2.50 2.85 3.30 5.00 0.005 0.05 1.3 2 35 0.2 1.836 2.550 2.907 3.366 5.100 0.2 0.5 1.5 120 5 V V V V % % V A A A mA mA 1.6 IAdj 1.5V(VIN - VOUT ) 5.75V, 10mAIOUT1A 1.5V(VIN - VOUT ) 5.75V VIN =VOUT+1.25V 10 4 13 QW-R102-008,D @vic AV1086 PARAMETER SYMBOL LINEAR INTEGRATED CIRCUIT TEST CONDITIONS f=120Hz,COUT=22F, Tantalum VIN - VOUT =3V, IOUT=1.5A TA=25C,30ms pulse MIN 60 TYP 72 MAX UNIT dB Ripple Rejection Thermal Regulation 0.004 0.02 %/W Temperature Stability * 0.5 % Long-Term Stability TA=125C, 1000hrs 0.03 1 % RMS Output Noise VOUT TA=25C, 10Hzf10kHz 0.003 % Thermal Resistance SOT-223 15 C/W Junction to Case (note 4) TO-252,TO-263,TO-220 3 Thermal Shutdown Junction Temperature 155 C Thermal Shutdown 10 C Hysteresis Note: 1. See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. 2. Line and load regulation are guaranteed up to the maximum power dissipation. Power dissipation is determined by input/output differential and the output current. Guaranteed maximum output power will not be available over the full input/output voltage range. 3. AV1086 adjustable only. 4. With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, Thermal Resistance Junction to Ambient can vary from 30C/W to more than 50C/W. Other mounting techniques may provide better thermal resistance than 30C/W. QW-R102-008,D @vic AV1086 LINEAR INTEGRATED CIRCUIT Figure 2. Load Regulation vs.Temperature 0.1 0.0 5 0 -0.05 -0.1 0.15 -0.2 -75 -50 -25 0 25 50 75 100 125150 175 I=1A TYPICAL PERFORMANCE CHARACTERISTICS Figure 1.Dropout Voltage vs.Output Current 1.5 1.4 Dropout Voltage Deviation(%) 0.3 0.6 0.9 1.2 Output Current (A) 1.5 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0 0 Dropout Voltage (V) Junction Temperature( C) Figure 4.Output Voltage vs.Temperature 3.7 3.65 3.6 Reference Voltage(V) 3.55 3.5 3.45 3.4 3.35 3.3 3.25 VOUT =3.3V VOUT =3.6V VOUT SET WITH 1% RESISTORS Figure 3.Reference Votage vs.Temperature 1.25 1.24 5 1.24 1.23 5 1.23 1.225 1.2 2 1.215 1.21 1.205 1.2 -75 -50 -25 0 25 50 75 100 125150 175 Reference Voltage(V) UZ1086 adjustable Only 3.2 -75 -50 -25 0 25 50 75 100 125150 175 Junction Temperature( C) Junction Temperature( C) QW-R102-008,D @vic 5 AV1086 LINEAR INTEGRATED CIRCUIT Figure 6.Adjust Pin Current vs.Temperature 100 90 Note1.UZ1086 Only Figure 5.Minimum Load Current vs.Temperature Minimum Load Current (mA) 4 Adjust Pin Current (A) 25 50 75 100 125 150 175 80 70 60 50 40 30 20 10 0 -75 -50 -25 0 3 2 1 0 -75 -50 -25 0 25 50 75 100 125150 175 Junction Temperature( C) Figure 7. Short-Circuit Current vs.Temperature 2.0 1.7 5 90 80 Short- Circuit Current (A) Ripple Rejection (dB) Junction Temperature( C) Figure 8. Ripple Rejection vs.Frequency 70 60 50 40 30 20 10 VIN-VOUT=3V 0.5 1.25 1.0 -75 -50 -25 0 25 50 75 100 125 150 175 0 10 Junction Temperature( C) Frequency (Hz) QW-R102-008,D |
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