A1084DR-18 [AITSEMI]
BIPOLAR LDO REGULATOR 5A BIPOLAR LINEAR REGULATOR;型号: | A1084DR-18 |
厂家: | AiT Semiconductor |
描述: | BIPOLAR LDO REGULATOR 5A BIPOLAR LINEAR REGULATOR |
文件: | 总13页 (文件大小:905K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
A1084
AiT Semiconductor Inc.
www.ait-ic.com
BIPOLAR LDO REGULATOR
5A BIPOLAR LINEAR REGULATOR
DESCRIPTION
FEATURES
Fixed and adjustable versions.
Maximum output current : 5A
A1084 is a series of low dropout three terminal
regulators with a typical dropout voltage of 1.4V at
5A load current.
Maximum input voltage: 15V
Line regulation: 0.2% (Typical)
Load regulation: 0.2% (Typical)
On-Chip Thermal Shutdown
Operation environment Temperature:
-40℃~ 85℃
Other than fixed voltage versions (1.8V, 2.5V, 3.3V,
5.0V), A1084 has an adjustable voltage version, with
which desired voltage can be achieved by setting the
values of two external resistors of the application
circuitry.
Available in TO-252, TO-263-2 and TO-263-3
packages
A1084 offers thermal shut down and current limit
functions to assure the stability of chip and power
system.
APPLICATION
Power Management for Computer Mother
Board, Graphic Card
Battery Charger
The A1084 is available in TO-252, TO-263-2 and
TO-263-3 packages.
Post Regulators for Switching Supplies
Microprocessor Supply
ORDERING INFORMATION
TYPICAL APPLICATION
Package Type
Part Number
A1084DR-XX
TO-252
D
SPQ: 2,500pcs/Reel
A1084DVR-XX
A1084S2R-XX
A1084S2VR-XX
A1084S3R-XX
A1084S3VR-XX
TO-263-2
S2
S3
Fig 1. A1084 fixed version application circuit
NOTE: Input capacitor (CIN=10uF) and Output
capacitor (COUT=22uF) are recommended in all
application circuit. Tantalum capacitor is preferred.
SPQ: 800pcs/Reel
TO-263-3
SPQ: 800pcs/Reel
XX: Output Voltage,
18 = 1.8V, 33 = 3.3V,
ADJ: Adjustable
Note
V: Halogen free Package
R: Tape & Reel
AiT provides all RoHS products
REV1.3
- JUN 2007 RELEASED, APR 2020 UPDATED -
- 1 -
A1084
AiT Semiconductor Inc.
www.ait-ic.com
BIPOLAR LDO REGULATOR
5A BIPOLAR LINEAR REGULATOR
PIN DESCRIPTION
Top View
TO-252
Top View
TO-263-2
Top View
TO-263-3
Pin #
A1084DR-XX
A1084DR-ADJ
A1084S2R-XX
A1084S2R-ADJ
A1084S3R-XX
A1084S3R-ADJ
1
2
3
GND
ADJ
GND
VOUT
VIN
ADJ
GND
ADJ
VOUT
VOUT
VOUT
VOUT
VOUT
VIN
VIN
VIN
VIN
VIN
REV1.3
- JUN 2007 RELEASED, APR 2020 UPDATED -
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A1084
AiT Semiconductor Inc.
www.ait-ic.com
BIPOLAR LDO REGULATOR
5A BIPOLAR LINEAR REGULATOR
ABSOLUTE MAXIMUM RATINGS
Max Input Voltage
15V
150°C
TJ, Operating Junction Temperature
TA, Ambient Temperature
-40°C ~85°C
TO-252
TO-263
6°C/W
3°C/W
Package Thermal Resistance
-40°C ~150°C
TS, Storage Temperature
Lead Temperature & Time
260°C, 10s
Stress beyond above listed “Absolute Maximum Ratings” may lead permanent damage to the device. These are stress ratings only and
operations of the device at these or any other conditions beyond those indicated in the operational sections of the specifications are not
implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED WORK CONDITIONS
Parameter
Input Voltage Range
Operating Junction Temperature
Symbol
TJ
Conditions
Min.
-
Typ. Max. Unit
-
-
15
V
-20
125
°C
REV1.3
- JUN 2007 RELEASED, APR 2020 UPDATED -
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A1084
AiT Semiconductor Inc.
www.ait-ic.com
BIPOLAR LDO REGULATOR
5A BIPOLAR LINEAR REGULATOR
ELECTRICAL CHARACTERISTICS
TJ = 25°C
Parameter
Reference Voltage
Symbol
VREF
Conditions
10mA ≤ IOUT ≤ 5A,1.5V ≤ VIN - VOUT ≤ 5V
Min.
Typ. Max. Unit
1.225 1.25 1.275
1.773 1.80 1.827
V
IOUT = 0mA, VIN = 4.8V, TJ = 25°C
10mA ≤ IOUT ≤ 5A, 3.4V ≤ VIN ≤ 7V 1.764 1.80 1.836
1.8V
V
IOUT = 0mA, VIN = 5.5V, TJ = 25°C
10mA ≤ IOUT ≤ 5A, 4.1V ≤ VIN ≤ 7V
IOUT = 0mA, VIN = 6.3V, TJ = 25°C
10mA ≤ IOUT ≤ 5A, 4.9V ≤ VIN ≤ 8V 3.234 3.3
IOUT = 0mA, VIN = 8.0V, TJ = 25°C 4.925 5.0
10mA ≤ IOUT ≤ 5A, 6.6V ≤ VIN ≤ 10V 4.90
2.462 2.50 2.537
2.5V
3.3V
5.0V
V
2.45 2.50
3.25 3.3
2.55
3.350
3.366
5.075
5.10
Output Voltage
VOUT
V
V
5.0
10
ADJ IOUT = 10mA, 2.85V ≤ VIN ≤ 10V
1.8V IOUT = 10mA, 3.4V ≤ VIN ≤ 10V
2.5V IOUT = 10mA, 4.1V ≤ VIN ≤ 10V
3.3V IOUT = 10mA, 4.9V ≤ VIN ≤ 10V
5.0V IOUT = 10mA, 6.6V ≤ VIN ≤ 10V
-
-
-
-
-
40
40
40
40
40
mV
mV
mV
mV
mV
10
10
10
10
Line Regulation
NOTE1
ΔVOUT
ADJ connected to ground
ADJ
-
-
-
-
-
-
16
16
16
16
16
1.4
50
50
50
50
50
1.6
mV
mV
mV
mV
mV
V
VIN − VOUT = 1.6V, 10mA ≤ IOUT ≤ 5A
1.8V VIN − VOUT = 1.6V, 0mA ≤ IOUT ≤ 5A
2.5V VIN − VOUT = 1.6V, 0mA ≤ IOUT ≤ 5A
3.3V VIN − VOUT = 1.6V, 0mA ≤ IOUT ≤ 5A
5.0V VIN − VOUT = 1.6V, 0mA ≤ IOUT ≤ 5A
Load Regulation
NOTE1, 2
ΔVOUT
Dropout Voltage
VIN −VOUT ΔVOUT, ΔVREF = 1%, IOUT = 5A
NOTE3
REV1.3
- JUN 2007 RELEASED, APR 2020 UPDATED -
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A1084
AiT Semiconductor Inc.
www.ait-ic.com
BIPOLAR LDO REGULATOR
5A BIPOLAR LINEAR REGULATOR
Parameter
Symbol
Conditions
Min. Typ. Max. Unit
Current Limit
VIN − VOUT = 3V, TJ = 25oC
A1084-ADJ
-
-
7
3
-
10
10
120
-
A
ILIMIT
Minimum Load
CurrentNOTE4
mA
mA
μA
dB
μA
%
Quiescent Current
Adjust Pin Current
Ripple Rejection
Iq
VIN = 10V
-
5
Adjustable Version
IADJ
-
45
65
0.4
-
2.85V ≤ VIN ≤ 4.25V, 10mA ≤ IOUT ≤ 5A
f = 120Hz, COUT = 25μF (Tan)
IOUT = 5A, VIN − VOUT = 3V
10mA ≤ IOUT ≤ 5A,
60
-
Adjust Pin Current
Change
ICHANGE
10
0.5
1.5V ≤ VIN − VOUT ≤ 6V
IOUT = 10mA,
Temperature
Stability
-
VIN − VOUT = 1.5V
Thermal
TO-252
TO-263
12.5
3
Resistance
θJC
-
-
-
-
°C/W
junction to Case
Over Temperature
Protection
OTP
150
°C
NOTE1: Line Regulation and Load Regulation are tested under constant junction temperature.
NOTE2: When load current varies between 0~5A and VIN-VOUT ranges from 1.5V~6V at constant junction temperature, the parameter
is satisfied the criterion in table. If temperature varies between -40℃≤TA≤85℃, it needs output current to be larger than 10mA
to satisfy the criterion.
NOTE3: Dropout Voltage is the voltage difference between the input and output pin when the input voltage is minimum to maintain the
lowest spec output voltage.
Dropout Voltage is the voltage difference between the input and output pin under IOUT=5A and the following test condition:
1) Find out output voltage value (as VOUT1) when VIN1=VOUT1+1.5V
2) Decrease input voltage until output voltage is equal to 98.5% of VOUT1, and the VIN and VOUT as VIN2 and VOUT2
.
3) VDROPOUT=VIN2-VOUT2
.
NOTE4: Minimum Load Current is defined as the minimum output current necessary to maintain regulation. Specified output accuracy
can be met when the output current exceeds the minimum load current (10mA) and the dropout voltage (VIN-VOUT) between
1.5V and 6V.
REV1.3
- JUN 2007 RELEASED, APR 2020 UPDATED -
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A1084
AiT Semiconductor Inc.
www.ait-ic.com
BIPOLAR LDO REGULATOR
5A BIPOLAR LINEAR REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS
1.
Dropout Voltage vs. Output Current
2.
Output Voltage vs. Temperature
3.
Output Voltage vs. Output Current
4.
Load Transient Response
5.
Line Transient Response
REV1.3
- JUN 2007 RELEASED, APR 2020 UPDATED -
- 6 -
A1084
AiT Semiconductor Inc.
www.ait-ic.com
BIPOLAR LDO REGULATOR
5A BIPOLAR LINEAR REGULATOR
BLOCK DIAGRAM
REV1.3
- JUN 2007 RELEASED, APR 2020 UPDATED -
- 7 -
A1084
AiT Semiconductor Inc.
www.ait-ic.com
BIPOLAR LDO REGULATOR
5A BIPOLAR LINEAR REGULATOR
DETAILED INFORMATION
A1084 is a series of low dropout voltage three terminal regulators. Its circuit has a trimmed bandgap reference
to ensure output voltage accuracy independent of temperature variance. On-chip thermal shutdown provides
protection against overload and conditions as elevated ambient temperature.
Its application circuitry requires minimum number of external components. Both fixed voltage and adjustable
voltage versions need input and output capacitors to assure output voltage stability. Any desired output
voltage from 1.25V to 10V can be achieved with adjustable version by assigning proper values to two external
resistors in its application circuitry (as shown in Fig.1, as R1, R2 are the two external resistors.).
Typical Application
A1084 has an adjustable version and fixed versions, Fig.1 shows their typical application circuitry.
A 10uF tan capacitor connected between input and GND as bypass capacitor and a 22uF tan capacitor
between output and GND are recommended for all application.
Using a bypass capacitor (CADJ) between the adjust terminal and ground can improve ripple rejection. The
bypass capacitor prevents ripple from being amplified in case the output voltage is increased. The impedance
of CADJ should be less than the resistance of R1 to prevent ripple from being amplified at any frequency. As
R1 is normally in the range of 120Ω~200Ω, the value of CADJ should satisfy the following condition:
1 / (2x FrequencyRipple x CADJ) < R1
A 10μF tan capacitor is recommended.
REV1.3
- JUN 2007 RELEASED, APR 2020 UPDATED -
- 8 -
A1084
AiT Semiconductor Inc.
www.ait-ic.com
BIPOLAR LDO REGULATOR
5A BIPOLAR LINEAR REGULATOR
VOUT = VREF x (1+R2/R1) + IADJ x R2
Fig 1. Typical Application of A1084
Explanation
The output voltage of adjustable version satisfies this followed equation:
VOUT = VREF× (1 + R2 / R1) + IADJ × R2.
The second term IADJ×R2 can be ignored since the adjustable pin current IADJ (~ 50μA) is much less than the
current through R1 (~ 4mA).
The value of R1 is preferred in the range of 120Ω~200Ω and the total output current of the adjustable version
of A1084 needs to exceed 10mA to assure normal chip operation.
REV1.3
- JUN 2007 RELEASED, APR 2020 UPDATED -
- 9 -
A1084
AiT Semiconductor Inc.
www.ait-ic.com
BIPOLAR LDO REGULATOR
5A BIPOLAR LINEAR REGULATOR
PACKAGE INFORMATION
Dimension in TO-252 (Unit: mm)
Symbol
Min
0
Max
0.10
2.40
1.12
0.84
0.79
0.57
0.52
6.70
A1
A2
A3
b
b1
c
2.20
1.02
0.75
0.74
0.49
0.48
6.50
c1
D
D1
D2
E
E1
E2
e
5.334 REF
4.70
9.90
6.00
4.92
10.30
6.20
5.30 REF
2.286 BSC
L
1.40
0.90
0.60
1.70
0°
1.60
1.25
1.00
1.90
8°
L2
L3
L4
θ
REV1.3
- JUN 2007 RELEASED, APR 2020 UPDATED -
- 10 -
A1084
AiT Semiconductor Inc.
www.ait-ic.com
BIPOLAR LDO REGULATOR
5A BIPOLAR LINEAR REGULATOR
Dimension in TO-263-2 (Unit: mm)
REV1.3
- JUN 2007 RELEASED, APR 2020 UPDATED -
- 11 -
A1084
AiT Semiconductor Inc.
www.ait-ic.com
BIPOLAR LDO REGULATOR
5A BIPOLAR LINEAR REGULATOR
Dimension in TO-263-3 (Unit: mm)
REV1.3
- JUN 2007 RELEASED, APR 2020 UPDATED -
- 12 -
A1084
AiT Semiconductor Inc.
www.ait-ic.com
BIPOLAR LDO REGULATOR
5A BIPOLAR LINEAR REGULATOR
IMPORTANT NOTICE
AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its product, specifications, to
discontinue any integrated circuit product or service without notice, and advises its customers to obtain the
latest version of relevant information to verify, before placing orders, that the information being relied on is
current.
AiT Semiconductor Inc.'s integrated circuit products are not designed, intended, authorized, or warranted to
be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT
products in such applications is understood to be fully at the risk of the customer. As used herein may involve
potential risks of death, personal injury, or servere property, or environmental damage. In order to minimize
risks associated with the customer's applications, the customer should provide adequate design and
operating safeguards.
AiT Semiconductor Inc. assumes to no liability to customer product design or application support. AiT
warrants the performance of its products of the specifications applicable at the time of sale.
REV1.3
- JUN 2007 RELEASED, APR 2020 UPDATED -
- 13 -
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