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(R)
LD1085 SERIES
3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
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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
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 F 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.
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
BLOCK DIAGRAM
September 1999
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LD1085 SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol V IN IOUT P to t T stg To p DC Input Voltage Output Current Power Dissipation Storage Temperature Range Operating Junction Temperature Range Parameter Value 30 Internally Limited Internally Limited -50 to 150 -40 to 125 Unit V mA mW
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C 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 3 50 D2PAK 3 62.5 Unit
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R thj- ca se Thermal Resistance Junction-case R thj- amb Thermal Resistance Junction-ambient
C/W C/W
APPLICATION CIRCUIT
CONNECTION DIAGRAM AND ORDERING NUMBERS (top view)
TO-220
TO-220 LD1085V18 LD1085V25 LD1085V28 LD1085V33 LD1085V36 LD1085V50 LD1085V80 LD1085V90 LD1085V120 LD1085V D 2PAK (**) LD1085D2T18 LD1085D2T25 LD1085D2T28 LD1085D2T33 LD1085D2T36 LD1085D2T50 LD1085D2T80 LD1085D2T90 LD1085D2T120 LD1085D2T
D2PAK
D 2PAK/A (**) LD1085D2M18 LD1085D2M25 LD1085D2M28 LD1085D2M33 LD1085D2M36 LD1085D2M50 LD1085D2M80 LD1085D2M90 LD1085D2M120 LD1085D2M
D2PAK/A
Output Voltage 1.8V 2.5V 2.85V 3.3V 3.6V 5V 8V 9V 12V ADJUSTABLE VERSION
(**) Available in Tape & Reel with the suffix "R" for fixed version and "-R" for adjustable version.
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LD1085 SERIES
ELECTRICAL CHARACTERISTICS FOR LD1086#18 (refer to the test circuits, Tj = -40 to 125 oC, VIN = 4.8 V, CIN = CO = 10 F unless otherwise specified)
Symbol VO VO V O V O V O V O Vd Id I SC Parameter Output Voltage Output Voltage (Note 1) Line Regulation Line Regulation Load Regulation Load Regulation Dropout Voltage Quiescent Current Short Circuit Current Thermal Regulation SVR eN S S Supply Voltage Rejection Output Noise Voltage Temperature Stability Long Term Stability 1000 hrs Ta = 125 oC IO = 0 mA IO = 0 to 3 A Test Conditions Tj = 25 oC VIN = 3.4 to 30 V Min. 1.782 1.764 Typ. 1.8 1.8 0.2 0.4 2 4 1.3 5 3.2 0.2 C O = 25F 60 4.5 0.5 0.008 75 0.003 0.5 0.5 0.04 Max. 1.818 1.836 4 4 10 20 1.5 10 Unit V V mV mV mV mV V mA A %/W dB % % %
VIN = 3.4 to 18 V IO = 0 mA Tj = 25 oC VIN = 3.4 to 18 V IO = 0 mA IO = 0 to 3 A IO = 0 to 3 A IO = 3 A VIN 30 V VIN - VO = 5V VIN - VO = 25V Ta = 25 oC 30ms Pulse IO = 3 A f = 120 Hz VIN = 5.3 1V Tj = 25 C
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B = 10Hz to 10KHz Ta = 25 oC
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 F unless otherwise specified)
Symbol VO VO V O V O V O V O Vd Id I SC Parameter Output Voltage Output Voltage (Note 1) Line Regulation Line Regulation Load Regulation Load Regulation Dropout Voltage Quiescent Current Short Circuit Current Thermal Regulation SVR eN S S Supply Voltage Rejection Output Noise Voltage Temperature Stability Long Term Stability 1000 hrs Ta = 125 C
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Test Conditions IO = 0 mA IO = 0 to 3 A Tj = 25 C Vin = 4.1 to 30 V
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Min. 2.475 2.45
Typ. 2.5 2.5 0.2 0.4 2 4 1.3 5
Max. 2.525 2.55 5 5 10 20 1.5 10
Unit V V mV mV mV mV V mA A
Vin = 4.1 to 18 V IO = 0 mA Tj = 25 oC Vin = 4.1 to 18 V IO = 0 mA IO = 0 to 3 A IO = 0 to 3 A IO = 3 A Vin 30 V VIN - VO = 5V VIN - VO = 25V Ta = 25 oC 30ms Pulse IO = 3 A f = 120 Hz Vin = 7.5 3V C O = 25F 60 3.2 0.2 Tj = 25 oC
4.5 0.5 0.008 72 0.003 0.5 0.5 0.04
%/W dB % % %
B = 10Hz to 10KHz Ta = 25 oC
Note1: See short-circuit curve for available output current at fixed dropout.
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LD1085 SERIES
ELECTRICAL CHARACTERISTICS FOR LD1085#285 (refer to the test circuits, Tj = -40 to 125 oC, VIN = 5.85 V, CIN = CO = 10 F unless otherwise specified)
Symbol VO VO V O V O V O V O Vd Id I SC Parameter Output Voltage Output Voltage (Note 1) Line Regulation Line Regulation Load Regulation Load Regulation Dropout Voltage Quiescent Current Short Circuit Current Thermal Regulation SVR eN S S Supply Voltage Rejection Output Noise Voltage Temperature Stability Long Term Stability 1000 hrs Ta = 125 oC IO = 0 mA IO = 0 to 3 A Test Conditions Tj = 25 oC VIN = 4.5 to 30 V Min. 2.821 2.793 Typ. 2.85 2.85 0.2 0.5 3 7 1.3 5 3.2 0.2 C O = 25F 60 4.5 0.5 0.008 72 0.003 0.5 0.5 0.04 Max. 2.879 2.907 6 6 15 20 1.5 10 Unit V V mV mV mV mV V mA A %/W dB % % %
VIN = 4.5 to 18 V IO = 0 mA Tj = 25 oC VIN = 4.5 to 18 V IO = 0 mA IO = 0 to 3 A IO = 0 to 3 A IO = 3 A VIN 30 V VIN - VO = 5V VIN - VO = 25V Ta = 25 oC 30ms Pulse IO = 3 A f = 120 Hz VIN = 7.85 3V Tj = 25 C
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B = 10Hz to 10KHz Ta = 25 oC
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 F unless otherwise specified)
Symbol VO VO V O V O V O V O Vd Id I SC Parameter Output Voltage Output Voltage (Note 1) Line Regulation Line Regulation Load Regulation Load Regulation Dropout Voltage Quiescent Current Short Circuit Current Thermal Regulation SVR eN S S Supply Voltage Rejection Output Noise Voltage Temperature Stability Long Term Stability 1000 hrs Ta = 125 C
o
Test Conditions IO = 0 mA IO = 0 to 3 A Tj = 25 C VIN = 4.9 to 30 V
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Min. 3.267 3.234
Typ. 3.3 3.3 0.5 1 3 7 1.3 5
Max. 3.333 3.366 6 6 15 20 1.5 10
Unit V V mV mV mV mV V mA A
VIN = 4.9 to 18 V IO = 0 mA Tj = 25 oC VIN = 4.9 to 18 V IO = 0 mA IO = 0 to 3 A IO = 0 to 3 A IO = 3 A VIN 30 V VIN - VO = 5V VIN - VO = 25V Ta = 25 oC 30ms Pulse IO = 3 A f = 120 Hz VIN = 8.3 3V C O = 25F 60 3.2 0.2 Tj = 25 oC
4.5 0.5 0.008 72 0.003 0.5 0.5 0.04
%/W dB % % %
B = 10Hz to 10KHz Ta = 25 oC
Note1: See short-circuit curve for available output current at fixed dropout.
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LD1085 SERIES
ELECTRICAL CHARACTERISTICS FOR LD1085#36 (refer to the test circuits, Tj = -40 to 125 oC, VIN = 5.85 V, CIN = CO = 10 F unless otherwise specified)
Symbol VO VO V O V O V O V O Vd Id I SC Parameter Output Voltage Output Voltage (Note 1) Line Regulation Line Regulation Load Regulation Load Regulation Dropout Voltage Quiescent Current Short Circuit Current Thermal Regulation SVR eN S S Supply Voltage Rejection Output Noise Voltage Temperature Stability Long Term Stability 1000 hrs Ta = 125 oC IO = 0 mA IO = 0 to 3 A Test Conditions Tj = 25 oC VIN = 5.2 to 30 V Min. 3.564 3.528 Typ. 3.6 3.6 0.5 1 3 7 1.3 5 3.2 0.2 C O = 25F 60 4.5 0.5 0.008 72 0.003 0.5 0.5 0.04 Max. 3.636 3.672 10 10 15 20 1.5 10 Unit V V mV mV mV mV V mA A %/W dB % % %
VIN = 5.2 to 18 V IO = 0 mA Tj = 25 oC VIN = 5.2 to 18 V IO = 0 mA IO = 0 to 3 A IO = 0 to 3 A IO = 3 A VIN 30 V VIN - VO = 5V VIN - VO = 25V Ta = 25 oC 30ms Pulse IO = 3 A f = 120 Hz VIN = 8.6 3V Tj = 25 C
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B = 10Hz to 10KHz Ta = 25 oC
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 F unless otherwise specified)
Symbol VO VO V O V O V O V O Vd Id I SC Parameter Output Voltage Output Voltage (Note 1) Line Regulation Line Regulation Load Regulation Load Regulation Dropout Voltage Quiescent Current Short Circuit Current Thermal Regulation SVR eN S S Supply Voltage Rejection Output Noise Voltage Temperature Stability Long Term Stability 1000 hrs Ta = 125 C
o
Test Conditions IO = 0 mA IO = 0 to 3 A Tj = 25 C VIN = 6.6 to 30 V
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Min. 4.95 4.9
Typ. 5 5 0.5 1 5 10 1.3 5
Max. 5.05 5.1 10 10 20 35 1.5 10
Unit V V mV mV mV mV V mA A
VIN = 6.6 to 20 V IO = 0 mA Tj = 25 oC VIN = 6.6 to 20 V IO = 0 mA IO = 0 to 3 A IO = 0 to 3 A IO = 3 A VIN 30 V VIN - VO = 5V VIN - VO = 25V Ta = 25 oC 30ms Pulse IO = 3 A f = 120 Hz VIN = 10 3V C O = 25F 60 3.2 0.2 Tj = 25 oC
4.5 0.5 0.008 72 0.003 0.5 0.5 0.04
%/W dB % % %
B = 10Hz to 10KHz Ta = 25 oC
Note1: See short-circuit curve for available output current at fixed dropout.
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LD1085 SERIES
ELECTRICAL CHARACTERISTICS FOR LD1085#80 (refer to the test circuits, Tj = -40 to 125 oC, VIN = 11 V, CIN = CO = 10 F unless otherwise specified)
Symbol VO VO V O V O V O V O Vd Id I SC Parameter Output Voltage Output Voltage (Note 1) Line Regulation LINe Regulation Load Regulation Load Regulation Dropout Voltage Quiescent Current Short Circuit Current Thermal Regulation SVR eN S S Supply Voltage Rejection Output Noise Voltage Temperature Stability Long Term Stability 1000 hrs Ta = 125 oC IO = 0 mA IO = 0 to 3 A Test Conditions Tj = 25 oC VIN =9.8 to 30 V Min. 7.92 7.84 Typ. 8 8 1 2 8 12 1.3 5 3.2 0.2 C O = 25F 54 4.5 0.5 0.008 71 0.003 0.5 0.5 0.04 Max. 8.08 8.16 18 18 30 60 1.5 10 Unit V V mV mV mV mV V mA A %/W dB % % %
VIN = 9.8 to 20 V IO = 0 mA Tj = 25 oC VIN = 9.8 to 20 V IO = 0 mA IO = 0 to 3 A IO = 0 to 3 A IO = 3 A VIN 30 V VIN - VO = 5V VIN - VO = 25V Ta = 25 oC 30ms Pulse IO = 3 A f = 120 Hz VIN = 13 3V Tj = 25 C
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B = 10Hz to 10KHz Ta = 25 oC
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 F unless otherwise specified)
Symbol VO VO V O V O V O V O Vd Id I SC Parameter Output Voltage Output Voltage (Note 1) Line Regulation Line Regulation Load Regulation Load Regulation Dropout Voltage Quiescent Current Short Circuit Current Thermal Regulation SVR eN S S Supply Voltage Rejection Output Noise Voltage Temperature Stability Long Term Stability 1000 hrs Ta = 125 C
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Test Conditions IO = 0 mA IO = 0 to 3 A Tj = 25 C VIN = 11 to 30 V
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Min. 8.91 8.82
Typ. 9 9 1 2 8 12 1.3 5
Max. 9.09 9.18 20 20 30 60 1.5 10
Unit V V mV mV mV mV V mA A
VIN = 11 to 20 V IO = 0 mA Tj = 25 C VIN = 11 to 20 V IO = 0 mA IO = 0 to 3 A IO = 0 to 3 A IO = 3 A VIN 30 V VIN - VO = 5V VIN - VO = 25V Ta = 25 oC 30ms Pulse IO = 3 A f = 120 Hz VIN = 14 3V C O = 25F 54 3.2 0.2 Tj = 25 oC
4.5 0.5 0.008 70 0.003 0.5 0.5 0.04
%/W dB % % %
B = 10Hz to 10KHz Ta = 25 oC
Note1: See short-circuit curve for available output current at fixed dropout.
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LD1085 SERIES
ELECTRICAL CHARACTERISTICS FOR LD1085#120 (refer to the test circuits, Tj = -40 to 125 oC, VIN = 15 V, CIN = CO = 10 F unless otherwise specified)
Symbol VO VO V O V O V O V O Vd Id I SC Parameter Output Voltage Output Voltage (Note 1) Line Regulation Line Regulation Load Regulation Load Regulation Dropout Voltage Quiescent Current Short Circuit Current Thermal Regulation SVR eN S S Supply Voltage Rejection Output Noise Voltage Temperature Stability Long Term Stability 1000 hrs Ta = 125 oC IO = 0 mA IO = 0 to 3 A Test Conditions Tj = 25 oC VIN = 13.8 to 30 V Min. 11.88 11.76 Typ. 12 12 1 2 12 24 1.3 5 3.2 0.2 C O = 25F 54 4.5 0.5 0.008 66 0.003 0.5 0.5 0.04 Max. 12.12 12.24 25 25 36 72 1.5 10 Unit V V mV mV mV mV V mA A %/W dB % % %
VIN = 13.8 to 25 V IO = 0 mA Tj = 25 oC VIN = 13.8 to 25 V IO = 0 mA IO = 0 to 3 A IO = 0 to 3 A IO = 3 A VIN 30 V VIN - VO = 5V VIN - VO = 25V Ta = 25 oC 30ms Pulse IO = 3 A f = 120 Hz VIN = 17 3V Tj = 25 C
o
B = 10Hz to 10KHz Ta = 25 oC
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 F unless otherwise specified)
Symbol VO VO V O V O V O V O Vd I O(mi n) I SC Parameter Output Voltage Output Voltage (Note 1) Line Regulation Line Regulation Load Regulation Load Regulation Dropout Voltage Minimum Load Current Short Circuit Current Thermal Regulation SVR I ADJ I ADJ eN S S Supply Voltage Rejection Adjust pin Current Adjust pin Current Change Output Noise Voltage Temperature Stability Long Term Stability 1000 hrs Ta = 125 oC IO = 10 mA IO = 0.01 to 3 A Test Conditions Tj = 25 C VIN = 2.8 to 30 V
o o
Min. 1.237 1.225
Typ. 1.25 1.25 0.015 0.035 0.1 0.2 1.3 3
Max. 1.263 1.275 0.2 0.2 0.3 0.4 1.5 10
Unit V V % % % % V mA A
VIN = 2.75 to 16.5V IO =10mA Tj =25 C VIN = 2.75 to 16.5V IO =10mA IO = 0.01 to 3 A IO = 0.01 to 3 A IO = 3 A VIN = 30 V VIN - VO = 5V VIN - VO = 25V Ta = 25 oC 30ms Pulse IO = 3 A f = 120 Hz C O = 25F CADJ = 25F VIN = 6.25 3V IO = 10 mA VIN = 4.25 V
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Tj = 25 oC
3.2 0.2 60
4.5 0.5 0.01 75 55 0.2 0.003 0.5 0.5 120 5 0.04
%/W dB A A % % %
VIN = 2.75 to 16.5 V IO = 0.01 to 3A B = 10Hz to 10KHz Ta = 25 C
Note1: See short-circuit curve for available output current at fixed dropout.
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LD1085 SERIES
TYPICAL CHARACTERISTICS (unless otherwise specified TJ=125oC, CIN=CO=10F) 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
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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
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LD1085 SERIES
TYPICAL CHARACTERISTICS (Continued) Supply Voltage Rejection vs Frequency Supply Voltage Rejection vs Temperature
Minimum Load Current vs Temperature
Stability
Stability
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LD1085 SERIES
TYPICAL CHARACTERISTICS (Continued) Line Transient Line Transient
Load Transient
Load Transient
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LD1085 SERIES
TO-220 MECHANICAL DATA
DIM. MIN. A C D D1 E F F1 F2 G G1 H2 L2 L4 L5 L6 L7 L9 DIA. 13.0 2.65 15.25 6.2 3.5 3.75 0.49 0.61 1.14 1.14 4.95 2.4 10.0 16.4 14.0 2.95 15.75 6.6 3.93 3.85 0.511 0.104 0.600 0.244 0.137 0.147
E
mm TYP. MAX. 4.60 1.32 2.72 1.27 0.70 0.88 1.70 1.70 5.15 2.7 10.40 0.019 0.024 0.044 0.044 0.194 0.094 0.393 MIN. 0.173 0.048 0.094 4.40 1.23 2.40
inch TYP. MAX. 0.181 0.051 0.107 0.050 0.027 0.034 0.067 0.067 0.203 0.106 0.409 0.645 0.551 0.116 0.620 0.260 0.154 0.151
A
C
D1
L2 F1
D
G1
Dia. F2 F
L5 L7 L6
L9
L4
G
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H2
P011C
LD1085 SERIES
TO-263 (D2PAK) MECHANICAL DATA
mm MIN. A A1 B B2 C C2 D E G L L2 L3 4.4 2.49 0.7 1.14 0.45 1.21 8.95 10 4.88 15 1.27 1.4 TYP. MAX. 4.6 2.69 0.93 1.7 0.6 1.36 9.35 10.4 5.28 15.85 1.4 1.75 MIN. 0.173 0.098 0.027 0.044 0.017 0.047 0.352 0.393 0.192 0.590 0.050 0.055 inch TYP. MAX. 0.181 0.106 0.036 0.067 0.023 0.053 0.368 0.409 0.208 0.624 0.055 0.068
DIM.
D A C A2 DETAIL "A" A1 B2 B G
C2
DETAIL"A"
E
L2
L
L3
P011P6/E
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LD1085 SERIES
D2PAK/A MECHANICAL DATA
mm MIN. A A1 B B2 C C2 D E G L L2 4.4 2.49 0.7 1.14 0.45 1.21 8.95 10 4.88 15 1.27 TYP. MAX. 4.6 2.69 0.93 1.7 0.6 1.36 9.35 10.4 5.28 15.85 1.4 MIN. 0.173 0.098 0.027 0.044 0.017 0.047 0.352 0.393 0.192 0.590 0.050 inch TYP. MAX. 0.181 0.106 0.036 0.067 0.023 0.053 0.368 0.409 0.208 0.624 0.055
DIM.
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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 (c) 1999 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 .
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