LT1083CP Linear Technology, LT1083CP Datasheet

IC LDO REG 7.5A ADJ TO-3P-3

LT1083CP

Manufacturer Part Number
LT1083CP
Description
IC LDO REG 7.5A ADJ TO-3P-3
Manufacturer
Linear Technology
Datasheet

Specifications of LT1083CP

Regulator Topology
Positive Adjustable
Voltage - Output
1.25 ~ 28.5 V
Voltage - Input
2.55 ~ 30 V
Voltage - Dropout (typical)
1.3V @ 7.5A
Number Of Regulators
1
Current - Output
7.5A
Current - Limit (min)
8A
Operating Temperature
0°C ~ 150°C
Mounting Type
Through Hole
Package / Case
TO-3P-3, TO-247-3
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1083CP
Manufacturer:
LT
Quantity:
5 510
Part Number:
LT1083CP#PBF
Manufacturer:
MITSUBISHI
Quantity:
210
Part Number:
LT1083CP#PBF
Manufacturer:
LT
Quantity:
20 000
Part Number:
LT1083CP-12#PBF
Manufacturer:
LT
Quantity:
1 450
APPLICATIONS
*For a 1.5A low dropout regulator see the LT1086 data sheet.
TYPICAL APPLICATION
FEATURES
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3-Terminal Adjustable
Output Current of 3A, 5A or 7.5A
Operates Down to 1V Dropout
Guaranteed Dropout Voltage at Multiple Current Levels
Line Regulation: 0.015%
Load Regulation: 0.1%
100% Thermal Limit Functional Test
Fixed Versions Available
Available in 3-Lead Plastic TO-220, TO-3P and DD
Packages
High Effi ciency Linear Regulators
Post Regulators for Switching Supplies
Constant Current Regulators
Battery Chargers
V
IN
≥ 6.5V
*REQUIRED FOR STABILITY
DEVICE
LT1083
LT1084
LT1085
+
10μF
IN
5V, 7.5A Regulator
LT1083
ADJ
OUT
OUTPUT CURRENT*
121Ω
1%
365Ω
1%
7.5A
5.0A
3.0A
+
10μF*
TANTALUM
1083/4/5 ADJ TA01
5V AT 7.5A
Positive Adjustable Regulators
DESCRIPTION
The LT
designed to provide 7.5A, 5A and 3A with higher effi ciency
than currently available devices. All internal circuitry is
designed to operate down to 1V input-to-output differential
and the dropout voltage is fully specifi ed as a function of
load current. Dropout is guaranteed at a maximum of 1.5V
at maximum output current, decreasing at lower load cur-
rents. On-chip trimming adjusts the reference voltage to
1%. Current limit is also trimmed, minimizing the stress
on both the regulator and power source circuitry under
overload conditions.
The LT1083/LT1084/LT1085 devices are pin compatible
with older 3-terminal regulators. A 10μF output capacitor
is required on these new devices. However, this is included
in most regulator designs.
Unlike PNP regulators, where up to 10% of the output cur-
rent is wasted as quiescent current, the LT1083 quiescent
current fl ows into the load, increasing effi ciency.
All other trademarks are the property of their respective owners.
, LT, LTM and LTM are registered trademarks of Linear Technology Corporation.
7.5A, 5A, 3A Low Dropout
®
1083 series of positive adjustable regulators are
LT1083/LT1084/LT1085
2
1
0
0
Dropout Voltage vs Output Current
OUTPUT CURRENT
1083/4/5 ADJ TA02
I
FULL LOAD
108345fg
1

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LT1083CP Summary of contents

Page 1

... Unlike PNP regulators, where up to 10% of the output cur- rent is wasted as quiescent current, the LT1083 quiescent current fl ows into the load, increasing effi ciency. 7.5A , LT, LTM and LTM are registered trademarks of Linear Technology Corporation. 5.0A All other trademarks are the property of their respective owners. 3. 7.5A 121Ω ...

Page 2

LT1083/LT1084/LT1085 ABSOLUTE MAXIMUM RATINGS Power Dissipation ................................Internally Limited Input-to-Output Voltage Differential C-Grades ..............................................................30V I-Grades ................................................................30V M-Grades (OBSOLETE) .........................................35V Operating Junction Temperature Range (Note 9) C-Grades: Control Section .................. 0°C to 125°C Power Transistor ................ 0°C to 150°C I-Grades: Control Section ...

Page 3

... Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. For more information on lead free part marking, go to: For more information on tape and reel specifi cations, go to: LT1083/LT1084/LT1085 PART MARKING* PACKAGE DESCRIPTION LT1083CP 3-Lead Plastic TO-3P LT1084CP 3-Lead Plastic TO-3P LT1084CT 3-Lead Plastic TO-220 ...

Page 4

LT1083/LT1084/LT1085 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T PARAMETER CONDITIONS Reference Voltage I OUT (V IN 10mA ≤ I 1.5V ≤ (V Line Regulation I LOAD M-Grade: 15V ≤ (V C-, I-Grades: 15V ≤ (V Load Regulation ...

Page 5

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T PARAMETER CONDITIONS Thermal Resistance Junction-to-Case Control Circuitry/Power Transistor LT1083 K Package P Package LT1084 K Package P Package T Package LT1085 K Package M, T Package Note 1: Stresses beyond ...

Page 6

LT1083/LT1084/LT1085 TYPICAL PERFORMANCE CHARACTERISTICS LT1083 Dropout Voltage 2 INDICATES GUARANTEED TEST POINT –40°C ≤ T ≤ 150°C J 0°C ≤ T ≤ 125° 150° 25° –55° ...

Page 7

... TEMPERATURE (°C) LT1083/4/5 ADJ G12 LT1083 Maximum Power Dissipation* 100 LT1083MK LT1083CP 30 20 LT1083CK 100 110 120 130 140 150 CASE TEMPERATURE (° LIMITED BY MAXIMUM JUNCTION TEMPERATURE LT1083/4/5 ADJ G15 LT1084 Maximum Power Dissipation LT1084MK 40 30 LT1084CT ...

Page 8

LT1083/LT1084/LT1085 TYPICAL PERFORMANCE CHARACTERISTICS LT1085 Ripple Rejection 100 V ≤ RIPPLE P-P RIPPLE 90 ≤ 0.5V P – ≥ OUT – ≥ OUT DROPOUT 50 ...

Page 9

BLOCK DIAGRAM THERMAL V ADJ APPLICATIONS INFORMATION The LT1083 family of 3-terminal adjustable regulators is easy to use and has all the protection features that are expected in high performance voltage regulators. They are short-circuit protected, and have safe area ...

Page 10

LT1083/LT1084/LT1085 APPLICATIONS INFORMATION Normally, capacitor values on the order of 100μF are used in the output of many regulators to ensure good transient response with heavy load current changes. Output capaci- tance can be increased without limit and larger values ...

Page 11

APPLICATIONS INFORMATION The problem occurs with a heavy output load when the input voltage is high and the output voltage is low, such as immediately after removal of a short. The load line for such a load may intersect the ...

Page 12

LT1083/LT1084/LT1085 APPLICATIONS INFORMATION Connected as shown not multiplied by the divider P ratio about 0.004Ω per foot using 16-gauge wire. P This translates to 4mV/ load current im- portant to keep ...

Page 13

TYPICAL APPLICATION T1 TRIAD C30B F-269U 20Ω 110VAC 20Ω 1 C30B 1N4003 1N4003 1μF 560Ω 82k 15k 10k 1N4148 * 1% FILM RESISTOR L: DALE TO-5 TYPE T2: STANCOR 11Z-2003 GENERAL PURPOSE REGULATOR WITH SCR PREREGULATOR TO LOWER ...

Page 14

LT1083/LT1084/LT1085 TYPICAL APPLICATION *C1 IMPROVES RIPPLE REJECTION. X SHOULD BE < RIPPLE FREQUENCY LT1083 IN ADJ + 10μF RETURN 14 Paralleling Regulators 2 FEET #18 WIRE* IN LT1083 OUT ADJ 0.015Ω ...

Page 15

TYPICAL APPLICATION High Effi ciency Regulator with Switching Preregulator V IN 28V 10k 1k 1mH IN LT1083 + ADJ MR1122 10,000μF 470Ω 1N914 28V 1M 4N28 10k + LT1011 10k – 28V 1N914 1.2V to 15V Adjustable Regulator V LT1083 ...

Page 16

LT1083/LT1084/LT1085 PACKAGE DESCRIPTION .760 – .775 .320 – .350 (19.30 – 19.69) (8.13 – 8.89) .420 – .480 (10.67 – 12.19) .060 .256 (1.524) (6.502) .060 .183 (1.524) (4.648) .075 (1.905) .300 (7.620) BOTTOM VIEW OF DD PAK HATCHED AREA ...

Page 17

... BSC Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. P Package 3-Lead Plastic TO-3P (Similar to TO-247) (Reference LTC DWG # 05-08-1450) .620 – ...

Page 18

... Very Low Dropout Linear Regulator LT1430 High Power Step-Down Switching Regulator UltraFast ™ Transient Response LDO Controller LT1575 LT1573 UltraFast Transient Response LDO Controller UltraFast is a trademark of Linear Technology Corporation. Linear Technology Corporation 18 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...

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