FAN1117AD285X [ETC]
Analog IC ; 模拟IC\n
| 型号： | FAN1117AD285X |
| 厂家： | 
ETC |
| 描述： | Analog IC
|
| 文件： | 总9页 (文件大小：70K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
www.fairchildsemi.com
FAN1117A
1A Adjustable/Fixed Low Dropout Linear Regulator
Features
Description
• Low dropout voltage
• Load regulation: 0.05% typical
• Trimmed current limit
The FAN1117A and FAN1117A-1.8, -2.5, -2.85, -3.3 and -5
are low dropout three-terminal regulators with 1A output
current capability. These devices have been optimized for low
voltage where transient response and minimum input voltage
are critical. The 2.85V version is designed specifically to be
used in Active Terminators for SCSI bus.
• On-chip thermal limiting
• Standard SOT-223, TO-220, and TO-252 packages
• Three-terminal adjustable or fixed 1.8V, 2.5V, 2.85V,
3.3V, 5V
Current limit is trimmed to ensure specified output current
and controlled short-circuit current. On-chip thermal limiting
provides protection against any combination of overload and
ambient temperatures that would create excessive junction
temperatures.
Applications
• Active SCSI terminators
• High efficiency linear regulators
• Post regulators for switching supplies
• Battery chargers
• 12V to 5V linear regulators
• Motherboard clock supplies
Unlike PNP type regulators where up to 10% of the output
current is wasted as quiescent current, the quiescent current
of the FAN1117A flows into the load, increasing efficiency.
The FAN1117A series regulators are available in the
industry-standard SOT-223, TO-220, and TO-252 (DPAK)
power packages.
Typical Applications
FAN1117A
VIN = 12V
VIN
VOUT
9V at 1A
+
+
10µF
22µF
R1
124Ω
ADJ
R2
768Ω
VOUT = VREF(1+R2/R1) + IADJ • R2
FAN1117A-2.85
VIN VOUT
VIN = 12V
5V at 1A
+
+
10µF
22µF
GND
REV. 1.0.5 2/28/02
PRODUCT SPECIFICATION
FAN1117A
Pin Assignments
Front View
Tab is VOUT
Front View
Tab is VOUT
1
2
3
Front View
3
2
IN
Tab is
VOUT
1
2
3
OUT
1
ADJ/GND
ADJ/ OUT IN
GND
ADJ/ OUT IN
GND
4-Lead Plastic SOT-223
JC = 15°C/W*
3-Lead Plastic TO-252
3-Lead Plastic TO-220
Θ
ΘJC = 3°C/W*
ΘJC = 3°C/W*
*With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, ΘJA can vary from
30°C/W to more than 50°C/W. Other mounting techniques may provide better thermal resistance than 30°C/W.
Absolute Maximum Ratings
Parameter
Min.
Max.
18
Unit
VIN
V
(VIN – VOUT) * IOUT
See Figure 1
125
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 10 sec.)
0
°C
°C
°C
-65
150
300
1.2
1.0
0.8
0.6
0.4
0.2
0
0
2
4
6
8
10
12
14
16
18
20
VIN – VOUT (V)
Figure 1. Absolute Maximum Safe Operating Area
2
REV. 1.0.5 2/28/02
FAN1117A
PRODUCT SPECIFICATION
Electrical Characteristics
Operating Conditions: VIN ≤ 7V, TJ = 25°C unless otherwise specified.
The • denotes specifications which apply over the specified operating temperature range.
Parameter
Conditions
Min.
Typ.
Max. Units
Reference Voltage3
1.5V ≤ (VIN – VOUT) ≤ 7V,
10mA ≤ IOUT ≤ 1A
•
1.225
(-2%)
1.250
1.275
(+2%)
V
Output Voltage4
10mA ≤ IOUT ≤ 1A
FAN1117A-1.8, 3.3V ≤ VIN ≤ 8.8V
FAN1117A-2.5, 4V ≤ VIN ≤ 9.5V
FAN1117A-2.85, 4.35V ≤ VIN ≤ 9.85V
FAN1117A-3.3, 4.8V ≤ VIN ≤ 10.3V
FAN1117A-5, 6.5V ≤ VIN ≤ 12V
•
•
•
•
•
1.764
2.450
2.793
3.234
4.900
1.8
2.5
2.85
3.3
1.836
2.550
2.907
3.366
5.100
V
V
V
V
V
5.0
Line Regulation1,2
Load Regulation1,2
Dropout Voltage
Current Limit
(VOUT + 1.5V) ≤ VIN ≤ 12V, IOUT = 10mA
(VIN – VOUT) = 2V, 10mA ≤ IOUT ≤ 1A
∆VREF = 1%, IOUT = 1A
•
•
•
•
•
•
0.005
0.05
1.100
1.5
0.2
0.5
%
%
V
1.200
(VIN – VOUT) = 2V
1.1
A
Adjust Pin Current3
35
120
5
µA
µA
Adjust Pin Current Change3,4 1.5V ≤ (VIN – VOUT) ≤ 7V,
0.2
10mA ≤ IOUT ≤ 1A
Minimum Load Current
Quiescent Current
Ripple Rejection
1.5V ≤ (VIN – VOUT) ≤ 15V
•
•
10
60
mA
mA
dB
VIN = VOUT + 1.25V
4
13
f = 120Hz, COUT = 22µF Tantalum,
(VIN – VOUT) = 3V, IOUT = 1A
72
Thermal Regulation
Temperature Stability
Long-Term Stability
RMS Output Noise
TA = 25°C, 30ms pulse
0.004
0.5
0.02
1.0
%/W
%
•
TA = 125°C, 1000hrs.
0.03
0.003
%
TA = 25°C, 10Hz ≤ f ≤ 10kHz
%
(% of VOUT
)
Thermal Resistance, Junction SOT-223
to Case
15
3
°C/W
°C/W
°C
TO-252, TO-220
Thermal Shutdown
Junction Temperature
155
10
Thermal Shutdown
Hysteresis
°C
Notes:
1. See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation are
measured at a constant junction temperature by low duty cycle pulse testing.
2. Line and load regulation are guaranteed up to the maximum power dissipation (18W). Power dissipation is determined by
input/output differential and the output current. Guaranteed maximum output power will not be available over the full input/
output voltage range.
3. FAN1117A only.
4. Output current must be limited to meet the absolute maximum ratings of the part.
REV. 1.0.5 2/28/02
3
PRODUCT SPECIFICATION
FAN1117A
Typical Performance Characteristics
1.5
1.4
0.10
0.05
0
∆I = 1A
1.3
1.2
1.1
T
= 0°C
1.0
0.9
0.8
0.7
0.6
0.5
0
J
-0.05
-0.10
T
= 25°C
J
T
= 125°C
J
-0.15
-0.20
0
0.2
0.4
0.6
0.8
1.0
-75 -50 -25
0
25 50 75 100 125150 175
OUTPUT CURRENT (A)
JUNCTION TEMPERATURE (°C)
Figure 2. Dropout Voltage vs. Output Current
Figure 3. Load Regulation vs. Temperature
1.260
1.255
1.250
1.245
1.240
1.235
1.230
1.225
1.220
1.215
1.210
3.70
VOUT SET WITH 1% RESISTORS
3.65
VOUT = 3.6V1
3.60
3.55
3.50
3.45
3.40
3.35
VOUT = 3.3V
3.30
3.25
3.20
Note:
1. FAN1117A Only
-75 -50 -25
0
25 50 75 100 125150 175
-75 -50 -25
0
25 50 75 100 125150 175
JUNCTION TEMPERATURE (°C)
JUNCTION TEMPERATURE (°C)
Figure 4. Reference Voltage vs. Temperature
Figure 5. Output Voltage vs. Temperature
5
4
3
2
1
0
100
Note:
90
1. FAN1117A Only
80
70
60
50
40
30
20
10
0
-75 -50 -25
0
25 50 75 100 125150 175
-75 -50 -25
0
25 50 75 100 125150 175
JUNCTION TEMPERATURE (°C)
JUNCTION TEMPERATURE (°C)
Figure 6. Minimum Load Current vs. Temperature
Figure 7. Adjust Pin Current vs. Temperature
4
REV. 1.0.5 2/28/02
FAN1117A
PRODUCT SPECIFICATION
Typical Performance Characteristics (continued)
90
80
70
60
50
2.0
1.75
1.5
40
30
1.25
(VIN - VOUT) = 3V
0.5 < VRIPPLE < 2V
IOUT = 1A
20
10
0
1.0
-75 -50 -25
0
25 50 75 100 125150 175
10
100
1K
10K
100K
JUNCTION TEMPERATURE (°C)
FREQUENCY (Hz)
Figure 8. Short-Circuit Current vs. Temperature
Figure 9. Ripple Rejection vs. Frequency
10
7.5
5
TO-252, TO-220
SOT-223
2.5
0
25
45
65
85
105
125
CASE TEMPERATURE (°C)
Figure 10. Maximum Power Dissipation
REV. 1.0.5 2/28/02
5
PRODUCT SPECIFICATION
FAN1117A
Mechanical Dimensions
4-Lead SOT-223 Package
Inches
Millimeters
Symbol
Notes
Min.
Max.
Min.
Max.
A
A1
B
c
—
—
.071
.181
.033
.090
.264
.148
.124
.041
.287
—
—
—
1.80
4.80
.840
2.29
6.71
3.71
3.15
1.04
7.29
—
.025
—
.640
—
D
E
e
.248
.130
.115
.033
.264
.012
—
6.30
3.30
2.95
.840
6.71
.310
—
F
H
I
10°
10°
J
10°
.0008
16°
.0040
10°
.0203
16°
.1018
K
L
10°
.010
16°
.014
10°
.250
16°
.360
M
N
D
e
K
A
E
H
N
J
I
M
L
B
A1
c
F
6
REV. 1.0.5 2/28/02
FAN1117A
PRODUCT SPECIFICATION
Mechanical Dimensions (continued)
3-Lead TO-220 Package
Inches
Millimeters
Symbol
Notes
Min.
Max.
Min.
Max.
A
.140
.015
.045
.014
.139
.560
.380
.090
.190
.045
.190
.040
3.56
.38
4.83
1.02
b
b1
c1
øP
D
E
e
1.14
.36
.070
.022
.161
1.78
.56
3.53
14.22
9.65
2.29
4.83
1.14
4.09
.650
.420
.110
.210
—
16.51
10.67
2.79
5.33
—
e1
e3
F
.020
.230
.080
.055
.270
.115
.51
1.40
6.87
2.92
H1
J1
L
5.94
2.04
.500
.580
12.70
14.73
L1
Q
α
.250 BSC
6.35 BSC
.100
.135
2.54
3.43
Notes:
3°
7°
3°
7°
1. Dimension c1 apply for lead finish.
H1
Q
L
b1
e3
e
e1
E
b
L1
E-PIN
øP
α (5X)
c1
A
J1
F
D
REV. 1.0.5 2/28/02
7
PRODUCT SPECIFICATION
FAN1117A
Mechanical Dimensions (continued)
3-Lead TO-252 Package
Notes:
Inches
Millimeters
Symbol
Notes
1. Dimensions are exclusive of mold flash, metal burrs or interlead
protrusion.
Min.
Max.
Min.
Max.
A
.086
.025
.030
.205
.018
.018
.094
.035
2.19
0.64
0.76
5.21
0.46
0.46
2.39
0.89
2. Stand off-height is measured from lead tip with ref. to Datum -B-.
3. Foot length is measured with ref. to Datum -A- with lead surface.
4. Thermal pad contour optional within dimension b3 and L3.
b
b2
b3
c
.045
.215
.024
.023
1.14
5.46
0.61
0.58
4
5. Formed leads to be planar with respect to one another at seating
place -C-.
c2
D
.210
.250
.245
.265
5.33
6.35
6.22
6.73
1
1
E
6. Dimensions and tolerances per ASME Y14.5M-1994.
e
.090 BSC
2.29 BSC
H
.370
.055
.410
.070
9.40
1.40
10.41
1.78
L
3
4
.108 REF
2.74 REF
L1
L3
L4
.035
.025
.080
.040
0.89
0.64
2.03
1.02
E
@PKG/
@HEATSINK
b3
L3
c2
D
E-PIN
L4
H
b2
L1
L
b
e
α = 0° – 10°
-B- -A-
A
-C-
8
REV. 1.0.5 2/28/02
PRODUCT SPECIFICATION
FAN1117A
Ordering Information
Product Number
FAN1117ADX
Package
TO-252 in tape and reel
SOT-223 in tape and reel
TO-252 in tape and reel
SOT-223 in tape and reel
TO-252 in tape and reel
SOT-223 in tape and reel
TO-252 in tape and reel
SOT-223 in tape and reel
TO-252 in tape and reel
SOT-223 in tape and reel
TO-220 in tape and reel
TO-252 in tape and reel
SOT-223 in tape and reel
FAN1117ASX
FAN1117AD18X
FAN1117AS18X
FAN1117AD25X
FAN1117AS25X
FAN1117AD285X
FAN1117AS285X
FAN1117AD33X
FAN1117AS33X
FAN1117AT33X
FAN1117AD5X
FAN1117AS5X
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO
ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME
ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN;
NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
2/28/02 0.0m 007
Stock#DS30001117A
2002 Fairchild Semiconductor Corporation
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