UTC UZ1086 LINEAR INTEGRATED CIRCUIT 1.5A ADJUSTABLE/FIXED LOW DROPOUT LINEAR REGULATOR 1 1 DESCRIPTION The UTC UZ1086 and UZ1086-1.8V,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 1: ADJ/GND 2: VOUT 3: VIN 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 UTC UNISONIC TECHNOLOGIES CO. LTD 1 QW-R102-008,D UTC UZ1086 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATIONS UZ1086 VIN VIN=3.3V + 10µF 1.5V at 1.5A VOUT ADJ R1 124Ω VOUT=VREF(1+R2/R1)+IAdj*R2 VIN VIN=5V + 10µF + 22µF R2 24.9Ω UZ1086-2.85 VOUT GND 2.85V at 1.5A + 22µF ABSOLUTE MAXIMUM RATINGS (Ta=25°C, unless otherwise specified) PARAMETER VIN Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering,10 sec) MIN MAX UNIT 0 -65 7.5 125 150 300 V °C °C °C ELECTRICAL CHARACTERISTICS (VIN≤7V, TJ=25°C, unless otherwise specified. The*denotes specifications which apply over the specified operating temperature range.) PARAMETER SYMBOL Reference Voltage (note 3) Output Voltage VREF * * * * * 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 UTC * * IAdj * * * * * * TEST CONDITIONS MIN TYP MAX UNIT 1.5V≤(VIN – VOUT ) ≤5.75V 10mA≤IOUT≤1A 10mA≤IOUT≤1A UZ1086-1.8V 3.3V≤VIN≤7V UZ1086-2.5 4V≤VIN ≤7V UZ1086-2.85 4.35V≤VIN ≤7V UZ1086-3.3 4.8V≤VIN ≤7V UZ1086-5.0 6.5V≤VIN ≤7V (VOUT+1.5V)≤VIN ≤7V, IOUT=10mA VIN – VOUT =2V, 10mA≤IOUT≤1A 1.225 1.25 1.275 V 1.764 2.450 2.793 3.234 4.900 1.80 2.50 2.85 3.30 5.00 0.005 0.05 1.836 2.550 2.907 3.366 5.100 0.2 0.5 V V V V 1.3 2 35 1.5 120 V A µA 0.2 5 µA 4 13 mA mA ∆VREF =1%,IOUT=1.5A VIN – VOUT =2V 1.5V≤(VIN – VOUT ) ≤5.75V, 10mA≤IOUT≤1A 1.5V≤(VIN – VOUT ) ≤5.75V VIN =VOUT+1.25V UNISONIC TECHNOLOGIES 1.6 10 CO. LTD % % 2 QW-R102-008,D UTC UZ1086 PARAMETER Ripple Rejection LINEAR INTEGRATED CIRCUIT SYMBOL TEST CONDITIONS MIN TYP f=120Hz,COUT=22µF, Tantalum VIN – VOUT =3V, IOUT=1.5A TA=25°C,30ms pulse 60 72 MAX UNIT dB Thermal Regulation 0.004 0.02 %/W Temperature Stability * 0.5 % Long-Term Stability TA=125°C, 1000hrs 0.03 1 % RMS Output Noise VOUT TA=25°C, 10Hz≤f≤10kHz 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. UZ1086 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 30°C/W to more than 50°C/W. Other mounting techniques may provide better thermal resistance than 30°C/W. UTC UNISONIC TECHNOLOGIES CO. LTD 3 QW-R102-008,D UTC UZ1086 LINEAR INTEGRATED CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS Figure 1.Dropout Voltage vs.Output Current Figure 2. Load Regulation vs.Temperature 1.5 0.1 1.3 1.2 Dropout Voltage Deviation(%) Dropout Voltage (V) 1.4 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0 0 0.3 0.6 0.9 1.2 Output Current (A) 0.0 5 0 -0.05 -0.1 0.15 -0.2 -75 -50 -25 0 1.5 3.65 VOUT SET WITH 1% RESISTORS 3.6 Reference Voltage(V) Reference Voltage(V) Figure 4.Output Voltage vs.Temperature 3.7 1.225 1.2 2 1.215 1.21 1.205 VOUT =3.6V 3.55 3.5 3.45 3.4 3.35 VOUT =3.3V 3.3 3.25 1.2 -75 -50 -25 0 25 50 75 100 125150 175 Junction Temperature(° C) UTC 25 50 75 100 125150 175 Junction Temperature(° C) Figure 3.Reference Votage vs.Temperature 1.25 1.24 5 1.24 1.23 5 1.23 ∆I=1A UZ1086 adjustable Only 3.2 -75 -50 -25 0 25 50 75 100 125150 175 Junction Temperature(° C) UNISONIC TECHNOLOGIES CO. LTD 4 QW-R102-008,D UTC UZ1086 LINEAR INTEGRATED CIRCUIT Figure 5.Minimum Load Current vs.Temperature Figure 6.Adjust Pin Current vs.Temperature 5 100 Note1.UZ1086 Only 4 80 Adjust Pin Current (µA) Minimum Load Current (mA) 90 3 2 1 70 60 50 40 30 20 10 0 -75 -50 -25 0 0 -75 -50 -25 0 25 50 75 100 125 150 175 Junction Temperature(° C) 25 50 75 100 125150 175 Junction Temperature(° C) Figure 7. Short-Circuit Current vs.Temperature Figure 8. Ripple Rejection vs.Frequency 2.0 90 Ripple Rejection (dB) Short- Circuit Current (A) 80 1.7 5 1.5 1.25 70 60 50 40 30 20 10 1.0 -75 -50 -25 0 25 50 75 100 125 150 175 VIN-VOUT=3V 0.5<VRIPPLE<2V IOUT=1A 0 10 Junction Temperature(° C) 100 1K 10K 100K Frequency (Hz) UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UTC UNISONIC TECHNOLOGIES CO. LTD 5 QW-R102-008,D