UNISONIC TECHNOLOGIES CO., LTD

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1 UNISONIC TECHNOLOGIES CO., LTD 1.5A ADJUSTABLE/FIXED LOW DROPOUT LINEAR REGULATOR DESCRIPTION The UTC UZ186 and UZ V, 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 1% of the output current is wasted as quiescent current, the quiescent current of the UZ186 flows into the load, increasing efficiency. FEATURES * Low dropout voltage * Load regulation:.5% typical * Trimmed current limit * On-chip thermal limiting * Three-terminal adjustable or fixed 1.2V, 1.8V, 2.5V, 2.85V, 3.3V, 5V ORDERING INFORMATION Ordering Number Pin Assignment Package Lead Free Halogen-Free Packing UZ186L-xx-AA3-R UZ186G-xx-AA3-R SOT-223 A/G O I Tape Reel UZ186L-xx-TA3-T UZ186G-xx-TA3-T TO-22 A/G O I Tube UZ186L-xx-TN3-R UZ186G-xx-TN3-R TO-252 A/G O I Tape Reel UZ186L-xx-TN3-T UZ186G-xx-TN3-T TO-252 A/G O I Tube UZ186L-xx-TQ2-R UZ186G-xx-TQ2-R TO-263 A/G O I Tape Reel UZ186L-xx-TQ2-T UZ186G-xx-TQ2-T TO-263 A/G O I Tube UZ186L-xx-TQ3-R UZ186G-xx-TQ3-R TO A/G O I Tape Reel UZ186L-xx-TQ3-T UZ186G-xx-TQ3-T TO A/G O I Tube Note: 1. xx: Output Voltage, refer to Marking Information. 2. A: ADJ (for adjustable regulator), G: GND (for fixed regulator) 1 of 7 Copyright 213 Unisonic Technologies Co., Ltd

2 MARKING INFORMATION PACKAGE VOLTAGE CODE MARKING TO-22 TO-252 TO-263 TO SOT :1.2V 18 :1.8V 25 :2.5V 2J :2.85V 33 :3.3V 5 :5.V AD :ADJ LOT Code Voltage Code UTC UZ186 XX L: Lead Free G: Halogen Free Date Code UNISONIC TECHNOLOGIES CO., LTD 2 of 7

3 ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Input Voltage V IN 7.5 V Junction Temperature T J +125 C Operating Temperature T OPR -4 ~ +85 C Storage Temperature T STG -4 ~ +15 C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. THERMAL DATA PARAMETER SYMBOL RATINGS UNIT TO C/W TO-22 4 C/W Junction to Case θ JC TO C/W SOT C/W ELECTRICAL CHARACTERISTICS (V IN 7V, T J =25 C, unless otherwise specified.) For UZ V PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Output Voltage V OUT * 1mA I OUT 1A 2.8V V IN 7V V Line Regulation (Note1,2) V OUT * (V OUT +1.6V) V IN 7V,I OUT =1mA.5.2 % Load Regulation (Note1,2) V OUT * V IN -V OUT =2V, 1mA I OUT 1A.5.5 % Dropout Voltage V D * I OUT =1.5A V Current Limit I LIMIT * V IN -V OUT =2V A Adjust Pin Current I ADJ * μa Adjust Pin Current Change I ADJ * 1.6V (V IN - V OUT ) 5.75V, 1mA I OUT 1A.2 5 μa Minimum Load Current I O(MIN) * 1.6V (V IN -V OUT ) 5.75V 1 ma Quiescent Current I Q * V IN =V OUT +1.25V 4 13 ma Ripple Rejection RR f=12hz, C OUT =22μF, Tantalum V IN -V OUT =3V, I OUT =1.5A 6 72 db Thermal Regulation T A =25 C, 3ms pulse.4.2 %/W Temperature Stability V OUT *.5 % Long-Term Stability V OUT T A =125 C, 1hrs.3 1. % RMS Output Noise V OUT T A =25 C, 1Hz f 1kHz.3 % Thermal shutdown Junction Temperature 155 C Thermal Shutdown Hysteresis 1 C UNISONIC TECHNOLOGIES CO., LTD 3 of 7

4 ELECTRICAL CHARACTERISTICS(Cont.) For Other Voltage PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Reference Voltage V REF * 1.5V (V IN -V OUT ) 5.75V 1mA I OUT 1A V UZ * 3.3V V IN 7V V UZ * 4V V IN 7V V Output Voltage UZ V OUT * 1mA I OUT 1A 4.35V V IN 7V V UZ * 4.8V V IN 7V V UZ V V IN 7V V Line Regulation (Note1,2) V OUT * (V OUT +1.5V) V IN 7V,I OUT =1mA.5.2 % Load Regulation (Note1,2) V OUT * V IN -V OUT =2V, 1mA I OUT 1A.5.5 % Dropout Voltage V D * I OUT =1.5A V Current Limit I LIMIT * V IN -V OUT =2V A Adjust Pin Current I ADJ * μa Adjust Pin Current Change I ADJ * 1.5V (V IN - V OUT ) 5.75V, 1mA I OUT 1A.2 5 μa Minimum Load Current I O(MIN) * 1.5V (V IN -V OUT ) 5.75V 1 ma Quiescent Current I Q * V IN =V OUT +1.25V 4 13 ma Ripple Rejection RR f=12hz, C OUT =22μF, Tantalum V IN -V OUT =3V, I OUT =1.5A 6 72 db Thermal Regulation T A =25 C, 3ms pulse.4.2 %/W Temperature Stability V OUT *.5 % Long-Term Stability V OUT T A =125 C, 1hrs.3 1. % RMS Output Noise V OUT T A =25 C, 1Hz f 1kHz.3 % Thermal shutdown Junction Temperature 155 C Thermal Shutdown Hysteresis 1 C 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. * stand for specifications which apply over the designed operating temperature range. UNISONIC TECHNOLOGIES CO., LTD 4 of 7

5 TYPICAL APPLICATION CIRCUIT UZ186 V IN =3.3V V IN V OUT 1.5V at 1.5A + + 1μF R1 22μF ADJ 124Ω V OUT =V REF (1+R2/R1)+I ADJ *R2 R2 24.9Ω UZ V IN =5V V IN V OUT + 1μF GND 2.85V at 1.5A + 22μF UNISONIC TECHNOLOGIES CO., LTD 5 of 7

6 TYPICAL CHARACTERISTICS Dropout Voltage (V) Fig. 1 Dropout Voltage vs. Output Current Output Current (A) 1.5 Dropout Voltage Deviation(%) Fig. 2 Load Regulation vs. Temperature.1 I=1A Reference Voltage(V) Fig. 3 Reference Voltage vs. Temperature Reference Voltage(V) Fig. 4 Output Voltage vs. Temperature 3.7 V OUT SET WITH 1% RESISTORS V OUT =3.6V V OUT =3.3V 3.25 UZ186 adjustable Only Fig. 5 Minimum Load Current vs. Temperature Fig. 6 Adjust Pin Current vs. Temperature 1 9 Note1.UZ186 Only Minimum Load Current (ma) Adjust Pin Current (μa) UNISONIC TECHNOLOGIES CO., LTD 6 of 7

7 TYPICAL CHARACTERISTICS(Cont.) Short- Circuit Current (A) Ripple Rejection (db) 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. UNISONIC TECHNOLOGIES CO., LTD 7 of 7

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