GS1085CM1.8 [VISHAY]
3A Low Dropout Positive Adjustable Regulator; 3A低压差正可调稳压型号: | GS1085CM1.8 |
厂家: | VISHAY |
描述: | 3A Low Dropout Positive Adjustable Regulator |
文件: | 总6页 (文件大小:77K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
GS1085
New Product
Vishay
formerly General Semiconductor
3A Low Dropout Positive Adjustable Regulator
TO-252
(DPak)
TO-220AB
TO-263AB
(D2Pak)
2
3
2
1
3
1
3
2
1
GS1085CE
GS1085CT
GS1085CM
Pin Definition
1. Adjust/Gnd.
2. Vout (tab)
3. Vin
Description
The GS1085 is a low dropout three terminal regulator with
3A output current capability. The output voltage is
adjustable with the use of a resistor divider. For fixed output
voltage versions, the output voltage is internally set at
1.8V, 2.5V, or 3.3V. Dropout is guaranteed at a maximum
of 1.4V at maximum output current. Its low dropout voltage
and fast transient response make it ideal for low voltage
microprocessor applications. Internal current and thermal
limiting provides protection against any overload condition
that would create excessive junction temperatures.
Features
• Dropout Voltage 1.3V at 3A Output Current
• Fast Transient Response
• Line Regulation typically at 0.015%
• Load Regulation typically at 0.1%
• Internal thermal and current limiting
• Adjustable Output Voltage or Fixed 1.8V, 2.5V, 3.3V
• Standard 3-Pin Power Packages
Applications
• Post Regulator for Switching Supply
• Microprocessor Power Supplies
• Constant-Current Regulators
• Motherboard I/O Power Supplies
Functional Block Diagram
Mechanical Data
Case: TO-220AB, TO-263AB (D2PAK),
VIN
TO-252 (DPAK)
Current
Amp
+
High temperature soldering guaranteed:
GM
--
+
VREF
1.25V
260°C/10 seconds at terminals
Thermal
Limit
Current
Limit
55µA
Case outlines are on the back page
VOUT
For
fixed
voltage
device
ADJ
GND
Document Number 74821
24-May-02
www.vishay.com
1
GS1085
Vishay
formerly General Semiconductor
Maximum Ratings and Thermal Characteristics (TA = 25°C unless otherwise noted)
Parameter
Symbol
Value
Unit
Vin Pin to ADJ/GND Pin
Thermal Resistance – Junction to Case
Vin
7
V
TO-220AB
TO-252
TO-263AB
3.0
8.0
3.0
RθJC
°C/W
Operating Junction Temperature Range
Storage Temperature Range
TJ
0 to +125
°C
°C
Tstg
–65 to 150
(2)
Electrical Characteristics(1) TJ = 25°C , VIN = 5V, Io = 10mA unless otherwise noted.
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
TJ = 25°C
1.238 1.250 1.262
1.225 1.250 1.275
0°C ≤ TJ ≤ 125°C
2.65V ≤ VIN ≤ 7V
10mA ≤ Io ≤ 3A
Reference Voltage
VREF
V
GS1085-1.8
VIN = 5V
IN = 5V
VIN = 7V
1.78
2.47
3.26
1.8
2.5
3.3
VN
1.82
2.53
3.33
GS1085-2.5
GS1085-3.3
GS1085
V
Output Voltage
VOUT
V
0.98VN
1.02VN
0°C ≤ TJ ≤ 125°C
2.65V ≤ VIN ≤ 5V
10mA ≤ Io ≤ 3A
2.65V ≤ VIN ≤ 7V
TJ = 25°C
0°C ≤ TJ ≤ 125°C
Line Regulation
Load Regulation
REGline
REGload
0.015
0.035
0.2
0.2
% VO
% VO
10mA ≤ Io ≤ 3A
TJ = 25°C
0°C ≤ TJ ≤ 125°C
0.1
0.2
0.3
0.4
0°C ≤ TJ ≤ 125°C
Io = 3A
1.3
1.28
1.25
1.4
1.37
1.34
Dropout Voltage
VDROP
V
Io = 2A
Io = 1A
Output Current
Io
0°C ≤ TJ ≤ 125°C
3.0
4.0
–
A
2.65 ≤ Vin ≤ 7V
10mA ≤ Io ≤ 3A
0°C ≤ TJ ≤ 125°C
Adjust Pin Current
Iadj
–
55
120
µA
2.65 ≤ Vin ≤ 7V
10mA ≤ Io ≤ 3A
0°C ≤ TJ ≤ 125°C
Adjust Pin Current Change
Temperature Stability
∆Iadj
–
0.2
5
µA
Io = 0.5A
0°C ≤ TJ ≤ 125°C
TS
–
–
0.5
5
–
%VO
mA
Minimum Load Current
Adjustable Version
ILMIN
0°C ≤ TJ ≤ 125°C
10
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Document Number 74821
24-May-02
GS1085
Vishay
formerly General Semiconductor
(2)
Electrical Characteristics(con’t.)(1) TJ = 25°C , VIN = 5V, Io = 10mA unless otherwise noted.
Parameter
Symbol
Test Conditions
0°C ≤ TJ ≤ 125°C
10HZ ≤ f ≤ 10 kHZ
Min
–
Typ
10
Max
14
–
Unit
mA
Quiescent Current
Fixed Voltage Version
IQ
RMS Output Noise
N
–
0.003
68
%VO
dB
f = 120 HZ, CO = 25µF
Cadj = 25µF
Ripple Rejection Ratio
RR
60
–
Thermal Regulation
Long Term Stability
RTH
TA = 25°C, 30ms Pulse
TA = 125°C, 1000 Hrs
–
–
0.02
0.3
0.05
%/W
%VO
–
Notes:
(1) All parameters, except nominal output voltage are specified for the variable voltage version, allowing a wider Vin Range.
The specified limits also apply for the fixed voltage versions over the allowable input voltage range: GS1085-1.8 (3.2V - 7.0V), GS1085-2.5 (3.9V - 7.0V),
GS1085-3.3 (4.75V - 7.0V).
(2) To maintain the specified junction temperatures, low duty cycle pulse testing is required for most parameters.
Typical Application Circuit
VIN
5V
VIN
5V
3
2
VOUT
3.3V
3
2
GS1085-1.8
GS1085-2.5
GS1085-3.3
GS1085
ADJ
VOUT
R1
125Ω
1%
1
VREF
+
+
C2
10µF
1
C2
10µF
+
+
C1
10µF
C1
10µF
R2
205Ω
1%
Fixed Voltage Regulator
Adjustable Voltage Regulator
Notes:
V
V
REF = VOUT – VADJ = 1.25V (typ.)
OUT = VREF x (1+R2/R1) + IADJ x R2
IADJ = 55µA (typ.)
(1) C1 needed if device is far away from filter capacitors
(2) C2 required for stability
Document Number 74821
24-May-02
www.vishay.com
3
GS1085
Vishay
formerly General Semiconductor
Ratings and
Characteristic Curves (TA = 25°C unless otherwise noted)
Fig. 1 – Dropout Voltage
Fig. 2 – Load Regulation
vs. Output Current
vs.Temperature
1.22
0.10
0.05
IOUT = 3A
1.20
1.18
1.16
1.14
1.12
1.10
1.08
1.06
0
--0.05
--0.10
--0.15
--0.20
0
0.5
1.0
1.5
2
2.5
3.0
0
20
40
60
80
100
120
Output Current (A)
Temperature (°C)
Fig. 3 – Minimum Load Current
(Adjustable Version)
Fig. 4 – Adjust Pin Current
100
80
60
40
20
0
10
8
TJ = 125°C
6
TJ = 25°C
TJ = 0°C
4
2
0
--50
--25
0
25
50
75
100
125
1
2
3
4
5
6
Temperature (°C)
Input / Output Differential Voltage (V)
Fig. 6 – Ripple Rejection
(with C 25µF)
Fig. 5 – Temperature Stability
adj
80
1.0
0.75
0.5
COUT = 25µF
I
= 0.5A
out
70
60
50
COUT = 10µF
COUT = 25µF
0.25
0.0
40
30
20
--0.25
--0.5
COUT = 10µF
--0.75
--1.0
10
100
1K
10K
100K
1M
--20
0
20
40
60
80
100
120 140
Frequency (Hz)
Temperature (°C)
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Document Number 74821
24-May-02
GS1085
Vishay
formerly General Semiconductor
Ratings and
Characteristic Curves (TA = 25°C unless otherwise noted)
Fig. 7 – Load Transient Response
Fig. 8 – Line Transient Response
0.1
0.05
0
50
0
VIN = 5V
CIN = 1µF
COUT = 10µF (Tantalum)
VOUT = 3.3V
--0.05
--0.1
--50
--100
COUT = 10µF (Tantalum)
VOUT = 3.3V
1.5A
0.1A
7.0
6.0
0
40
80
120
160
200
0
10
20
30
40
50
Time (µs)
Time (µs)
Ordering Information
GS1085Cxx xxx
Output Voltage
Default: Adj.
1.8: 1.8V
2.5: 2.5V
3.3: 3.3V
Package Type
T: TO-220
M: TO-263
E: TO-252
Document Number 74821
24-May-02
www.vishay.com
5
GS1085
Vishay
formerly General Semiconductor
Case Outlines
TO-220
TO-252 (DPAK)
4.82
3.56
4.08
3.54
10.66
9.66
1.39
0.51
6.73
6.35
2.38
2.19
3.42
2.54
0.58
0.46
5.46
5.21
6.85
5.85
16.51
14.23
5.59
5.33
10.42
9.40
2
3
1
6.35 Max.
0.88
0.64
0.51 (min.)
14.73
12.70
2.28 (TYP.)
1.27
1.02
(with plating)
1.14
2.79
2.29
1.77
1.15
0.31
2.92
2.04
TO-263
1.01
0.38
(with plating)
4.83
4.06
10.29
9.65
1.40
Dimensions in millimeters
1.14
1.40 (max.)
9.66
8.63
15.88
14.60
1
2
3
2.80
2.28
1.40
1.14
1.00
0.50
0.7 (max.)
2.54 (TYP.)
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Document Number 74821
24-May-02
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