UTC UZ1085 LINEAR INTEGRATED CIRCUIT 3A ADJUSTABLE/FIXED LOW DROPOUT LINEAR REGULATOR 1 DESCRIPTION The UZ1085-ADJ,UZ1085-Fixed are low dropout three-terminal regulators with 3A output current capability. These devices have been optimized for low voltage applications including VTT bus termination, where transient response and minimum input voltage are critical. 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 temperature that would create excessive junction temperatures. 23 12 3 TO-252 1 FEATURES 2 TO-220 1 3 3 TO-263-3 TO-263 *Fast transient response 2 *Low dropout voltage at up to 3A *Load regulation:0.05% typical *Trimmed current limit 1: ADJ/GND *On-chip thermal limiting 2: VOUT 3: VIN APPLICATIONS *Pentium Class GTL+bus supply *Low voltage logic supply *Post regulator for switching supply TYPICAL APPLICATIONS UZ1085-ADJ VOUT VIN VIN=12V 22μF ADJ + VOUT=VREF(1+R2/R1)+IADJ*R2 VIN=9V 22μF UTC VIN + 9V at 3A R1 124Ω 22μF R2 768Ω UZ1085-3.3 VOUT GND + 3.3V at 3A + 22μF UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R102-013,A UTC UZ1085 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS PARAMETER Input Voltage (VIN – VOUT) * IOUT Operating Junction Temperature Range Storage Temperature Range Lead Temperature(Soldering,10 sec.) SYMBOL RATING UNIT VIN 18 See Figure 1 0~125 -65~150 300 V Tj Tstg Tlead ℃ ℃ ℃ 4 IOUT (Amps) 3 2 1 0 0 0 2 50 100 150 4 6 8 10 12 14 VIN-VOUT (V) Figure 1. Absolute Maximum Sate Operating Area UTC UZ1085-ADJ(ADJUSTABLE) ELECTRICAL CHARACTERISTICS (Tj=25℃ unless otherwise specified) PARAMETER Reference Voltage Line Regulation Load Regulation Dropout Voltage Current Limit Adjust Pin Current Adjust Pin Current Change Minimum Load Current Quiescent Current Ripple Rejection Thermal Regulation Temperature Stability Long-Term Stability RMS Output Noise(% of VOUT) Thermal Resistance, Junction to Case (TO-220/TO-252/TO-263/TO-263-3) Thermal shutdown UTC CONDITIONS 1.5V≦(VIN – VOUT)≦8.25V 10mA≦IOUT≦3A (VOUT +1.5V) ≦VIN≦12V, IOUT=10mA (VIN – VOUT)=3V 10mA≦IOUT≦3A △VREF%=1%,lO=3A (VIN-VOUT)=2V 1.5V≦（VIN – VOUT）≦12V， 10mA≦IOUT≦3A 1.5V≦(VIN-VOUT)≦12V VIN=5V f=120Hz，COUT=22μF Tatalum, (VIN – VOUT)=3V,IOUT=3A TA=25℃,30ms pulse TA=125℃, 1000hr TA=25℃,10Hz≦f≦10kHz MIN. TYP. MAX. UNIT 1.225 1.25 1.275 V 0.005 0.2 % 0.05 0.5 % 1.150 4 35 0.2 1.300 V A µA µA 4 72 13 0.004 0.5 0.03 0.003 3 0.02 3.1 120 5 10 60 1.0 mA mA dB %/W % % % °C/W °C 150 UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R102-013,A UTC UZ1085 LINEAR INTEGRATED CIRCUIT UTC UZ1085-X.X(FIXED VOLTAGE) ELECTRICAL CHARACTERISTICS (Operating Conditions : 4.75≦VIN≦5.25,Tj=25℃ unless otherwise specified) PARAMETER Output Voltage CONDITIONS UZ1085-1.5 Line Regulation Load Regulation Dropout Voltage Current Limit Minimum Load Current Quiescent Current Ripple Rejection 3.0V≤VIN≤8.5V 10mA≤IOUT≤3A UZ1085-2.5V 4.0V≤VIN≤9.5V 10mA≤IOUT≤3A UZ1085-3.3 4.8V≦VIN≦10.3V 10mA≦IOUT≦3A (VOUT +1.5V) ≦VIN≦12V, IOUT=10mA (VIN – VOUT)=3V 10mA≦IOUT≦3A △VREF%=1%,lO=3A (VIN-VOUT)=2V 1.5V≦(VIN-VOUT)≦12V VIN=5V f=120Hz，COUT=22μF Tatalum, (VIN – VOUT)=3V,IOUT=3A TA=25℃,30ms pulse Thermal Regulation Temperature Stability Long-Term Stability RMS Output Noise(% of Vout) Thermal Resistance, Junction to Case (TO-220/TO-252/TO-263/TO-263-3) Thermal shutdown TA=125℃, 1000hr TA=25℃,10Hz≦f≦10kHz MIN. TYP. MAX. 1.47 1.5 1.53 2.45 2.5 2.55 3.234 3.3 3.366 0.005 0.2 % 0.05 0.5 % 1.150 4 1.300 4 72 13 V A mA mA dB 0.004 0.5 0.03 0.003 3 0.02 3.1 10 60 1.0 UNIT V %/W % % % °C/W °C 150 TYPICAL PERFORMANCE CHARACTERIISTICS 0.10 OUTPUT VOLTAGE DEVIATION(%) 1.5 DROPOUT VOLTAGE(V) 1.4 1.3 1.2 1.1 1.0 T=0℃ 0.9 T=25℃ 0.8 T=125℃ 0.7 △I=3A 0.05 0 -0.05 -0.10 -0.15 0.6 0.5 2.5 1.5 2 1 OUTPUT CURRENT(A) Figure 2. Dropout Voltage vs.Output Current 0 0.5 UTC 3.0 -0.20 -75 -50 -25 0 25 50 75 100 125 150175 JUNCTION TEMPERATURE(℃) Figure 3. Load Regulation vs.Temperature UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R102-013,A 1.260 3.70 1.255 3.65 REFERENCE VOLTAGE(V) REFERENCE VOLTAGE(V) UTC UZ1085 LINEAR INTEGRATED CIRCUIT 1.250 1.245 1.240 1.235 1.230 1.225 V OUT SET W ITH 1% RESISTORS V OUT=3.6V 3.60 3.55 UZ1085-ADJ 3.50 3.45 3.40 3.35 V OUT=3.3V 1.220 3.30 1.215 3.25 1.210 -75 -50 -25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE(℃ ) 3.20 -75 -50 -25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (℃ ) Figure 5. Output Voltage vs.Temperature Figure 4. Reference Voltage vs.Temperature 5 UZ1085-3.3 100 UZ1085-ADJ 4 80 ADJUST PIN CURRENT(米A) MINMUM LOAD CURRENT(mA) 90 3 2 1 0 -75 -50 -25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE(℃ ) 70 60 50 40 30 20 10 0 -75 -50 -25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE(℃ ) Figure 6. Minimum Load Current vs.Temperature Figure 7. Adjust Pin Current vs.Temperature 90 5.0 RIPPLE REJECTIONS(dB) SHORT-CIRCUIT CURRENT(A) 80 4.5 4.0 3.5 70 60 50 40 30 20 10 3.0 -75 -50 -25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE(℃ ) Figure 8. Short-Circuit Current vs.Temperature UTC 0 10 (V IN - V OUT)≦ 3V 0.5V≦ V RIPPLE ≦ 2V IOUT=3A 100k 10k 1k FREQUENCY(Hz) Figure 9. Ripple Rejection vs.Frequency 100 UNISONIC TECHNOLOGIES CO., LTD. 4 QW-R102-013,A UTC UZ1085 LINEAR INTEGRATED CIRCUIT 20 POWER(W) 15 10 5 0 50 0 60 70 50 100 150 80 90 100 110 120 130 140 150 CASE TEMPERATURE(℃) Figure 10. Maximum Power Dissipation UTC UNISONIC TECHNOLOGIES CO., LTD. 5 QW-R102-013,A