LD1085 SERIES 3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS ■ ■ ■ ■ ■ ■ ■ ■ TYPICAL DROPOUT VOLTAGE 1.3V AT 3A THREE TERMINAL ADJUSTABLE OR FIXED OUTPUT VOLATGE 1.8V,2.5V, 2.85V, 3.3V, 3.6V, 5V, 8V, 9V, 12V GUARANTEED OUTPUT CURRENT UP TO 3A OUTPUT TOLERANCE ±1% AT 25oC AND ±2% IN FULL TEMPERATURE RANGE INTERNAL POWER AND THERMAL LIMIT WIDE OPERATING TEMPERATURE RANGE -40oC TO 125oC PACKAGE AVAILABLE: TO-220 D2PAK PINOUT COMPATIBILITY WITH STANDARD ADJUSTABLE VOLTAGE REGULATORS DESCRIPTION The LD1085 is a LOW DROP Voltage Regulator able to provide up to 3A of Output Current. Dropout is guaranteed at a maximum of 1.5V at the maximum output current, decreasing at lower loads. The LD1085 is pin compatible with older 3-terminal adjustable regulators, but has better performances in term of drop and output tolerance. A 2.85V output version is suitable for SCSI-2 active termination. Unlike PNP D2PAK/A TO-220 D2PAK regulators, where a part of the output current is wasted as quiescent current, the LD1085 quiescent current flow into the load, so increase efficency. Only a 10 µF minimum capacitor is need for stability. The device is supplied in TO-220, D2PAK and D2PAK/A packages. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 1% at 25oC. BLOCK DIAGRAM May 2000 1/15 LD1085 SERIES ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit 30 V Output Current Internally Limited mA P to t Power Dissipation Internally Limited mW T stg Storage Temperature Range V IN DC Input Voltage IOUT To p Operating Junction Temperature Range -50 to 150 o C -40 to 125 o C Absolute Maximum Ratings are those value beyond which damage to the device may occur. Functional operation under these condition is not implied. Over the above suggested Max Power Dissipation a Short Circuit could definetively damage the device. THERMAL DATA Symbol Parameter TO-220 R thj- ca se Thermal Resistance Junction-case R thj- amb Thermal Resistance Junction-ambient 3 50 D2PAK 3 62.5 Unit o o APPLICATION CIRCUIT FOR FIXED AND ADJUSTABLE VERSION VO = VREF (1 + R2 ) R1 CONNECTION DIAGRAM AND ORDERING NUMBERS (top view) D2PAK TO-220 TO-220 D 2PAK (**) D 2PAK/A (**) LD1085V18 LD1085V25 LD1085V28 LD1085V33 LD1085V36 LD1085V50 LD1085V80 LD1085V90 LD1085V120 LD1085D2T18 LD1085D2T25 LD1085D2T28 LD1085D2T33 LD1085D2T36 LD1085D2T50 LD1085D2T80 LD1085D2T90 LD1085D2T120 LD1085D2M18 LD1085D2M25 LD1085D2M28 LD1085D2M33 LD1085D2M36 LD1085D2M50 LD1085D2M80 LD1085D2M90 LD1085D2M120 LD1085V LD1085D2T LD1085D2M (**) Available in Tape & Reel with the suffix ”R” for fixed version and ”-R” for adjustable version. 2/15 D2PAK/A Output Voltage 1.8V 2.5V 2.85V 3.3V 3.6V 5V 8V 9V 12V 1.25 to 28V C/W C/W LD1085 SERIES ELECTRICAL CHARACTERISTICS FOR LD1086#18 (refer to the test circuits, Tj = -40 to 125 oC, VIN = 4.8 V, CIN = CO = 10 µF unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit IO = 0 mA Tj = 25 oC 1.782 1.8 1.818 V Output Voltage (Note 1) IO = 0 to 3 A VIN = 3.4 to 30 V 1.764 1.8 1.836 V ∆V O Line Regulation VIN = 3.4 to 18 V IO = 0 mA Tj = 25 oC 0.2 4 mV ∆V O Line Regulation VIN = 3.4 to 18 V IO = 0 mA 0.4 4 mV VO Output Voltage VO o ∆V O Load Regulation IO = 0 to 3 A ∆V O Load Regulation IO = 0 to 3 A Vd Dropout Voltage IO = 3 A Id Quiescent Current VIN ≤ 30 V Short Circuit Current VIN - VO = 5V VIN - VO = 25V Thermal Regulation Ta = 25 oC 30ms Pulse Supply Voltage Rejection IO = 3 A f = 120 Hz VIN = 5.3 ± 1V eN Output Noise Voltage B = 10Hz to 10KHz Ta = 25 oC S Temperature Stability S Long Term Stability I SC SVR Tj = 25 C 3.2 0.2 C O = 25µF 2 10 mV 4 20 mV 1.3 1.5 V 5 10 mA 4.5 0.5 0.008 60 1000 hrs Ta = 125 oC A 0.04 %/W 75 dB 0.003 % 0.5 % 0.5 % Note1: See short-circuit curve for available output current at fixed dropout. ELECTRICAL CHARACTERISTICS FOR LD1085#25 (refer to the test circuits, Tj = -40 to 125 oC, VIN = 5.5 V, CIN = CO = 10 µF unless otherwise specified) Symbol Parameter Test Conditions o Min. Typ. Max. Unit VO Output Voltage IO = 0 mA Tj = 25 C 2.475 2.5 2.525 V VO Output Voltage (Note 1) IO = 0 to 3 A Vin = 4.1 to 30 V 2.45 2.5 2.55 V ∆V O Line Regulation Vin = 4.1 to 18 V IO = 0 mA Tj = 25 oC 0.2 5 mV 0.4 5 mV 2 10 mV ∆V O Line Regulation Vin = 4.1 to 18 V IO = 0 mA ∆V O Load Regulation IO = 0 to 3 A ∆V O Load Regulation IO = 0 to 3 A Vd Dropout Voltage IO = 3 A Id Quiescent Current Vin ≤ 30 V Short Circuit Current VIN - VO = 5V VIN - VO = 25V Thermal Regulation Ta = 25 oC 30ms Pulse Supply Voltage Rejection IO = 3 A f = 120 Hz Vin = 7.5 ± 3V eN Output Noise Voltage B = 10Hz to 10KHz Ta = 25 oC S Temperature Stability I SC SVR S Long Term Stability Tj = 25 oC 3.2 0.2 o 1000 hrs Ta = 125 C C O = 25µF 4 20 mV 1.3 1.5 V 5 10 mA 4.5 0.5 0.008 60 A 0.04 %/W 72 dB 0.003 % 0.5 % 0.5 % Note1: See short-circuit curve for available output current at fixed dropout. 3/15 LD1085 SERIES ELECTRICAL CHARACTERISTICS FOR LD1085#285 (refer to the test circuits, Tj = -40 to 125 oC, VIN = 5.85 V, CIN = CO = 10 µF unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit IO = 0 mA Tj = 25 oC 2.821 2.85 2.879 V Output Voltage (Note 1) IO = 0 to 3 A VIN = 4.5 to 30 V 2.793 2.85 2.907 V ∆V O Line Regulation VIN = 4.5 to 18 V IO = 0 mA Tj = 25 oC 0.2 6 mV ∆V O Line Regulation VIN = 4.5 to 18 V IO = 0 mA 0.5 6 mV VO Output Voltage VO o ∆V O Load Regulation IO = 0 to 3 A ∆V O Load Regulation IO = 0 to 3 A Vd Dropout Voltage IO = 3 A Id Quiescent Current VIN ≤ 30 V Short Circuit Current VIN - VO = 5V VIN - VO = 25V Thermal Regulation Ta = 25 oC 30ms Pulse Supply Voltage Rejection IO = 3 A f = 120 Hz VIN = 7.85 ± 3V eN Output Noise Voltage B = 10Hz to 10KHz Ta = 25 oC S Temperature Stability S Long Term Stability I SC SVR Tj = 25 C 3.2 0.2 C O = 25µF 3 15 mV 7 20 mV 1.3 1.5 V 5 10 mA 4.5 0.5 0.008 60 1000 hrs Ta = 125 oC A 0.04 %/W 72 dB 0.003 % 0.5 % 0.5 % Note1: See short-circuit curve for available output current at fixed dropout. ELECTRICAL CHARACTERISTICS FOR LD1085#33 (refer to the test circuits, Tj = -40 to 125 oC, VIN = 6.3 V, CIN = CO = 10 µF unless otherwise specified) Symbol Parameter Test Conditions o Min. Typ. Max. Unit VO Output Voltage IO = 0 mA Tj = 25 C 3.267 3.3 3.333 V VO Output Voltage (Note 1) IO = 0 to 3 A VIN = 4.9 to 30 V 3.234 3.3 3.366 V ∆V O Line Regulation VIN = 4.9 to 18 V IO = 0 mA Tj = 25 oC 0.5 6 mV ∆V O Line Regulation VIN = 4.9 to 18 V IO = 0 mA 1 6 mV ∆V O Load Regulation IO = 0 to 3 A 3 15 mV ∆V O Load Regulation IO = 0 to 3 A Vd Dropout Voltage IO = 3 A Id Quiescent Current VIN ≤ 30 V Short Circuit Current VIN - VO = 5V VIN - VO = 25V Thermal Regulation Ta = 25 oC 30ms Pulse Supply Voltage Rejection IO = 3 A f = 120 Hz VIN = 8.3 ± 3V eN Output Noise Voltage B = 10Hz to 10KHz Ta = 25 oC S Temperature Stability I SC SVR S Long Term Stability Tj = 25 oC 3.2 0.2 o 1000 hrs Ta = 125 C Note1: See short-circuit curve for available output current at fixed dropout. 4/15 C O = 25µF 7 20 mV 1.3 1.5 V 5 10 mA 4.5 0.5 0.008 60 A 0.04 %/W 72 dB 0.003 % 0.5 % 0.5 % LD1085 SERIES ELECTRICAL CHARACTERISTICS FOR LD1085#36 (refer to the test circuits, Tj = -40 to 125 oC, VIN = 5.85 V, CIN = CO = 10 µF unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit IO = 0 mA Tj = 25 oC 3.564 3.6 3.636 V Output Voltage (Note 1) IO = 0 to 3 A VIN = 5.2 to 30 V 3.528 ∆V O Line Regulation VIN = 5.2 to 18 V IO = 0 mA Tj = 25 oC ∆V O Line Regulation VIN = 5.2 to 18 V IO = 0 mA VO Output Voltage VO o ∆V O Load Regulation IO = 0 to 3 A ∆V O Load Regulation IO = 0 to 3 A Vd Dropout Voltage IO = 3 A Id Quiescent Current VIN ≤ 30 V Short Circuit Current VIN - VO = 5V VIN - VO = 25V Thermal Regulation Ta = 25 oC 30ms Pulse Supply Voltage Rejection IO = 3 A f = 120 Hz VIN = 8.6 ± 3V eN Output Noise Voltage B = 10Hz to 10KHz Ta = 25 oC S Temperature Stability S Long Term Stability I SC SVR Tj = 25 C 3.2 0.2 C O = 25µF 3.6 3.672 V 0.5 10 mV 1 10 mV 3 15 mV 7 20 mV 1.3 1.5 V 5 10 mA 4.5 0.5 0.008 60 1000 hrs Ta = 125 oC A 0.04 %/W 72 dB 0.003 % 0.5 % 0.5 % Note1: See short-circuit curve for available output current at fixed dropout. ELECTRICAL CHARACTERISTICS FOR LD1085#50 (refer to the test circuits, Tj = -40 to 125 oC, VIN = 8 V, CIN = CO = 10 µF unless otherwise specified) Symbol Parameter Test Conditions o Min. Typ. Max. Unit 4.95 5 5.05 V 4.9 5 5.1 V 0.5 10 mV 1 10 mV 5 20 mV VO Output Voltage IO = 0 mA Tj = 25 C VO Output Voltage (Note 1) IO = 0 to 3 A VIN = 6.6 to 30 V ∆V O Line Regulation VIN = 6.6 to 20 V IO = 0 mA Tj = 25 oC ∆V O Line Regulation VIN = 6.6 to 20 V IO = 0 mA ∆V O Load Regulation IO = 0 to 3 A ∆V O Load Regulation IO = 0 to 3 A 10 35 mV Vd Dropout Voltage IO = 3 A 1.3 1.5 V Id Quiescent Current VIN ≤ 30 V 5 10 mA Short Circuit Current VIN - VO = 5V VIN - VO = 25V Thermal Regulation Ta = 25 oC 30ms Pulse Supply Voltage Rejection IO = 3 A f = 120 Hz VIN = 10 ± 3V eN Output Noise Voltage B = 10Hz to 10KHz Ta = 25 oC S Temperature Stability I SC SVR S Long Term Stability Tj = 25 oC 3.2 0.2 o 1000 hrs Ta = 125 C C O = 25µF 4.5 0.5 0.008 60 A 0.04 %/W 72 dB 0.003 % 0.5 % 0.5 % Note1: See short-circuit curve for available output current at fixed dropout. 5/15 LD1085 SERIES ELECTRICAL CHARACTERISTICS FOR LD1085#80 (refer to the test circuits, Tj = -40 to 125 oC, VIN = 11 V, CIN = CO = 10 µF unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit IO = 0 mA Tj = 25 oC 7.92 8 8.08 V Output Voltage (Note 1) IO = 0 to 3 A VIN =9.8 to 30 V 7.84 8 8.16 V ∆V O Line Regulation VIN = 9.8 to 20 V IO = 0 mA Tj = 25 oC 1 18 mV ∆V O LINe Regulation VIN = 9.8 to 20 V IO = 0 mA 2 18 mV VO Output Voltage VO o ∆V O Load Regulation IO = 0 to 3 A 8 30 mV ∆V O Load Regulation IO = 0 to 3 A 12 60 mV Vd Dropout Voltage IO = 3 A 1.3 1.5 V Id Quiescent Current VIN ≤ 30 V 5 10 mA Short Circuit Current VIN - VO = 5V VIN - VO = 25V Thermal Regulation Ta = 25 oC 30ms Pulse Supply Voltage Rejection IO = 3 A f = 120 Hz VIN = 13 ± 3V eN Output Noise Voltage B = 10Hz to 10KHz Ta = 25 oC S Temperature Stability S Long Term Stability I SC SVR Tj = 25 C 3.2 0.2 4.5 0.5 0.008 C O = 25µF 54 1000 hrs Ta = 125 oC A 0.04 %/W 71 dB 0.003 % 0.5 % 0.5 % Note1: See short-circuit curve for available output current at fixed dropout. ELECTRICAL CHARACTERISTICS FOR LD1085#90 (refer to the test circuits, Tj = -40 to 125 oC, VIN = 12 V, CIN = CO = 10 µF unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit o VO Output Voltage IO = 0 mA Tj = 25 C 8.91 9 9.09 V VO Output Voltage (Note 1) IO = 0 to 3 A VIN = 11 to 30 V 8.82 9 9.18 V ∆V O Line Regulation VIN = 11 to 20 V IO = 0 mA Tj = 25 C 1 20 mV 2 20 mV 8 30 mV o ∆V O Line Regulation VIN = 11 to 20 V IO = 0 mA ∆V O Load Regulation IO = 0 to 3 A ∆V O Load Regulation IO = 0 to 3 A 12 60 mV Vd Dropout Voltage IO = 3 A 1.3 1.5 V Id Quiescent Current VIN ≤ 30 V 5 10 mA Short Circuit Current VIN - VO = 5V VIN - VO = 25V Thermal Regulation Ta = 25 oC 30ms Pulse Supply Voltage Rejection IO = 3 A f = 120 Hz VIN = 14 ± 3V eN Output Noise Voltage B = 10Hz to 10KHz Ta = 25 oC S Temperature Stability I SC SVR S Long Term Stability Tj = 25 oC 3.2 0.2 o 1000 hrs Ta = 125 C Note1: See short-circuit curve for available output current at fixed dropout. 6/15 C O = 25µF 4.5 0.5 0.008 54 A 0.04 %/W 70 dB 0.003 % 0.5 % 0.5 % LD1085 SERIES ELECTRICAL CHARACTERISTICS FOR LD1085#120 (refer to the test circuits, Tj = -40 to 125 oC, VIN = 15 V, CIN = CO = 10 µF unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit IO = 0 mA Tj = 25 oC 11.88 12 12.12 V Output Voltage (Note 1) IO = 0 to 3 A VIN = 13.8 to 30 V 11.76 12 12.24 V ∆V O Line Regulation VIN = 13.8 to 25 V IO = 0 mA Tj = 25 oC 1 25 mV ∆V O Line Regulation VIN = 13.8 to 25 V IO = 0 mA 2 25 mV VO Output Voltage VO o ∆V O Load Regulation IO = 0 to 3 A 12 36 mV ∆V O Load Regulation IO = 0 to 3 A 24 72 mV Vd Dropout Voltage IO = 3 A 1.3 1.5 V Id Quiescent Current VIN ≤ 30 V 5 10 mA Short Circuit Current VIN - VO = 5V VIN - VO = 25V Thermal Regulation Ta = 25 oC 30ms Pulse Supply Voltage Rejection IO = 3 A f = 120 Hz VIN = 17 ± 3V eN Output Noise Voltage B = 10Hz to 10KHz Ta = 25 oC S Temperature Stability S Long Term Stability I SC SVR Tj = 25 C 3.2 0.2 4.5 0.5 0.008 C O = 25µF 54 1000 hrs Ta = 125 oC A 0.04 %/W 66 dB 0.003 % 0.5 % 0.5 % Note1: See short-circuit curve for available output current at fixed dropout. ELECTRICAL CHARACTERISTICS FOR LD1085 (refer to the test circuits, Tj = -40 to 125 oC, VIN = 4.25 V, CIN = CO = 10 µF unless otherwise specified) Symbol Parameter Test Conditions o VO Output Voltage IO = 10 mA VO Output Voltage (Note 1) IO = 0.01 to 3 A Tj = 25 C VIN = 2.8 to 30 V Min. Typ. Max. Unit 1.237 1.25 1.263 V 1.225 1.25 1.275 V 0.2 % ∆V O Line Regulation VIN = 2.75 to 16.5V IO =10mA Tj =25 C 0.015 ∆V O Line Regulation VIN = 2.75 to 16.5V IO =10mA 0.035 0.2 % ∆V O Load Regulation IO = 0.01 to 3 A 0.1 0.3 % ∆V O Load Regulation IO = 0.01 to 3 A 0.2 0.4 % Vd Dropout Voltage IO = 3 A 1.3 1.5 V Minimum Load Current VIN = 30 V 3 10 mA Short Circuit Current VIN - VO = 5V VIN - VO = 25V Thermal Regulation Ta = 25 oC 30ms Pulse SVR Supply Voltage Rejection IO = 3 A f = 120 Hz C O = 25µF CADJ = 25µF VIN = 6.25 ± 3V I ADJ Adjust pin Current IO = 10 mA Adjust pin Current Change VIN = 2.75 to 16.5 V IO = 0.01 to 3A I O(mi n) I SC ∆I ADJ eN Output Noise Voltage S Temperature Stability S Long Term Stability o Tj = 25 oC 3.2 0.2 0.01 VIN = 4.25 V o B = 10Hz to 10KHz Ta = 25 C 1000 hrs Ta = 125 oC 4.5 0.5 60 A 0.04 75 %/W dB 55 120 µA 0.2 5 µA 0.003 % 0.5 % 0.5 % Note1: See short-circuit curve for available output current at fixed dropout. 7/15 LD1085 SERIES TYPICAL CHARACTERISTICS (unless otherwise specified TJ=125oC, CIN=CO=10µF) Output Voltage vs Temperature Output Voltage vs Temperature Output Voltage vs Temperature Short Circuit Current vs Dropout Voltage Line Regulation vs Temperature Load Regulation vs Temperature 8/15 LD1085 SERIES TYPICAL CHARACTERISTICS (Continued) Dropout Voltage vs Temperature Dropout Voltage vs Output Current Adjust Pin Current vs Temperature Quiescent Current vs Temperature Quiescent Current vs Output Current Supply Voltage Rejection vs Output Current 9/15 LD1085 SERIES TYPICAL CHARACTERISTICS (Continued) Supply Voltage Rejection vs Frequency Supply Voltage Rejection vs Temperature Minimum Load Current vs Temperature Stability Stability 10/15 LD1085 SERIES TYPICAL CHARACTERISTICS (Continued) Line Transient Line Transient Load Transient Load Transient 11/15 LD1085 SERIES TO-220 MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. MIN. TYP. MAX. A 4.40 4.60 0.173 0.181 C 1.23 1.32 0.048 0.051 D 2.40 2.72 0.094 D1 0.107 1.27 0.050 E 0.49 0.70 0.019 0.027 F 0.61 0.88 0.024 0.034 F1 1.14 1.70 0.044 0.067 F2 1.14 1.70 0.044 0.067 G 4.95 5.15 0.194 0.203 G1 2.4 2.7 0.094 0.106 H2 10.0 10.40 0.393 0.409 14.0 0.511 L2 16.4 L4 0.645 13.0 0.551 2.65 2.95 0.104 0.116 L6 15.25 15.75 0.600 0.620 L7 6.2 6.6 0.244 0.260 L9 3.5 3.93 0.137 0.154 DIA. 3.75 3.85 0.147 0.151 D1 C D A E L5 H2 G G1 F1 L2 F2 F Dia. L5 L9 L7 L6 12/15 L4 P011C LD1085 SERIES TO-263 (D2PAK) MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. MIN. TYP. MAX. A 4.4 4.6 0.173 0.181 A1 2.49 2.69 0.098 0.106 B 0.7 0.93 0.027 0.036 B2 1.14 1.7 0.044 0.067 C 0.45 0.6 0.017 0.023 C2 1.23 1.36 0.048 0.053 D 8.95 9.35 0.352 0.368 E 10 10.4 0.393 0.409 G 4.88 5.28 0.192 0.208 L 15 15.85 0.590 0.624 L2 1.27 1.4 0.050 0.055 L3 1.4 1.75 0.055 0.068 D C2 A2 A C DETAIL”A” DETAIL”A” A1 B2 E B G L2 L L3 P011P6/F 13/15 LD1085 SERIES D2PAK/A MECHANICAL DATA mm DIM. MIN. 14/15 TYP. inch MAX. MIN. TYP. MAX. A 4.4 4.6 0.173 0.181 A1 2.49 2.69 0.098 0.106 B 0.7 0.93 0.027 0.036 B2 1.14 1.7 0.044 0.067 C 0.45 0.6 0.017 0.023 C2 1.21 1.36 0.047 0.053 D 8.95 9.35 0.352 0.368 E 10 10.4 0.393 0.409 G 4.88 5.28 0.192 0.208 L 15 15.85 0.590 0.624 L2 1.27 1.4 0.050 0.055 LD1085 SERIES Information furnished is believed to be accurate and reliable. However, STMicroelectronic s assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems withoutexpress written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics 2000 STMicroelectronics – Printed in Italy – All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com . 15/15