Fairchild FAN1086M285X 1.5a adjustable/fixed low dropout linear regulator Datasheet

www.fairchildsemi.com
FAN1086
1.5A Adjustable/Fixed Low Dropout Linear Regulator
Features
Description
•
•
•
•
•
•
The FAN1086 and FAN1086-2.5, -2.85, -3.3 and -5 are low
dropout three-terminal regulators with 1.5A 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.
Low dropout voltage
Load regulation: 0.05% typical
Trimmed current limit
On-chip thermal limiting
Standard SOT-223, TO-263, and TO-252 packages
Three-terminal adjustable or fixed 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
5V to 3.3V 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 FAN1086 flows into the load, increasing efficiency.
The FAN1086 series regulators are available in the industrystandard SOT-223, TO-263, and TO-252 power packages.
Typical Applications
FAN1086
VIN = 3.3V
VIN
+
VOUT
10µF
R1
124Ω
ADJ
1.5V at 1.5A
+
22µF
R2
24.9Ω
VOUT = VREF(1 + R2/R1) + IAdj • R2
FAN1086-2.85
VIN = 5V
+
VIN
VOUT
10µF
2.85V at 1.5A
+
22µF
GND
REV. 1.0.7 11/10/03
PRODUCT SPECIFICATION
FAN1086
Pin Assignments
Tab is
VOUT
Front View
Tab is
VOUT
3
IN
2
OUT
1
ADJ/GND
4-Lead Plastic SOT-223
ΘJC = 15°C/W*
1
ADJ/
GND
2
OUT
Tab is
VOUT
1
3
ADJ/
GND
IN
3-Lead Plastic TO-263
ΘJC = 3°C/W*
2
3
IN
3-Lead Plastic TO-252
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.
Unit
7.5
V
0
125
°C
-65
150
°C
300
°C
VIN
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 10 sec.)
2
REV. 1.0.7 11/10/03
FAN1086
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
•
1.225
(-2%)
1.250
1.275
(+2%)
V
2.450
2.793
3.234
4.900
2.5
2.85
3.3
5.0
2.550
2.907
3.366
5.100
V
V
V
V
Reference Voltage , VREF
1.5V ≤ (VIN - VOUT) ≤ 5.75V,
10mA ≤ IOUT ≤ 1A
Output Voltage
10mA ≤ IOUT ≤ 1A
FAN1086-2.5, 4V ≤ VIN ≤ 7V
FAN1086-2.85, 4.35V ≤ VIN ≤ 7V
FAN1086-3.3, 4.8V ≤ VIN ≤ 7V
FAN1086-5, 6.5V ≤ VIN ≤ 7V
•
•
•
•
(VOUT + 1.5V) ≤ VIN ≤ 7V, IOUT = 10mA
•
0.005
0.2
%
Load Regulation
(VIN – VOUT) = 2V, 10mA ≤ IOUT ≤ 1A
•
0.05
0.5
%
Dropout Voltage
∆VREF = 1%, IOUT = 1.5A
•
1.300
1.500
V
Current Limit
(VIN – VOUT) = 2V
•
3
Line Regulation1,2
1,2
Adjust Pin Current3, IAdj
2.0
A
35
120
µA
0.2
5
µA
Adjust Pin Current Change3
1.5V ≤ (VIN – VOUT) ≤ 5.75,
10mA ≤ IOUT ≤ 1A
•
Minimum Load Current
1.5V ≤ (VIN – VOUT) ≤ 5.75
•
Quiescent Current
VIN = VOUT + 1.25V
•
Ripple Rejection
f = 120Hz, COUT = 22µF Tantalum,
(VIN – VOUT) = 3V, IOUT = 1.5A
Thermal Regulation
TA = 25°C, 30ms pulse
10
mA
4
60
13
72
0.004
•
Temperature Stability
1.6
•
mA
dB
0.02
0.5
%/W
%
Long-Term Stability
TA = 125°C, 1000hrs.
0.03
RMS Output Noise
(% of VOUT)
TA = 25°C, 10Hz ≤ f ≤ 10kHz
0.003
%
Thermal Resistance,
Juncation to Case
SOT-223
15
°C/W
TO-263, TO-252
3
°C/W
Thermal Shutdown
Junction Temperature
155
°C
10
°C
Thermal Shutdown
Hysteresis
1.0
%
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. 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. FAN1086 only.
REV. 1.0.7 11/10/03
3
PRODUCT SPECIFICATION
FAN1086
Typical Performance Characteristics
0.10
DROPOUT VOLTAGE DEVIATION (%)
DROPOUT VOLTAGE (V)
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0
0
0.3
0.6
0.9
1.2
0
-0.05
-0.10
-0.15
-0.20
-75 -50 -25 0
1.5
OUTPUT CURRENT (A)
Figure 2. Load Regulation vs. Temperature
1.250
3.70
1.245
3.65
1.240
1.235
1.230
1.225
1.220
1.215
1.210
VOUT = 3.6V1
3.60
3.55
3.50
3.45
3.40
3.35
VOUT = 3.3V
3.30
3.25
1.200
-75 -50 -25 0
3.20
-75 -50 -25 0
25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Figure 4. Output Voltage vs. Temperature
100
Note:
1. FAN1086 Only
90
ADJUST PIN CURRENT (µA)
MINIMUM LOAD CURRENT (mA)
Note:
1. FAN1086 Only
25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
5
4
3
2
1
80
70
60
50
40
30
20
10
0
-75 -50 -25 0
25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Figure 5. Minimum Load Current vs. Temperature
4
VOUT SET WITH 1% RESISTORS
1.205
Figure 3. Reference Voltage vs. Temperature
25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
REFERENCE VOLTAGE (V)
Figure 1. Dropout Voltage vs. Output Current
∆I = 1A
0.05
0
-75 -50 -25 0
25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Figure 6. Adjust Pin Current vs. Temperature
REV. 1.0.7 11/10/03
FAN1086
PRODUCT SPECIFICATION
Typical Performance Characteristics (continued)
90
80
RIPPLE REJECTION (dB)
SHORT-CIRCUIT CURRENT (A)
2.0
1.75
1.5
1.25
70
60
50
40
30
(VIN - VOUT) = 3V
0.5 < VRIPPLE < 2V
IOUT = 1A
20
10
1.0
-75 -50 -25 0
0
10
25 50 75 100 125 150 175
100
JUNCTION TEMPERATURE (°C)
1K
10K
100K
FREQUENCY (Hz)
Figure 7. Short-Circuit Current vs. Temperature
Figure 8. Ripple Rejection vs. Frequency
10
5000
OUTPUT CAP'S ESR (mΩ)
10ma < IOUT < IMAX
POWER (W)
7.5
TO-263
5
SOT-223
2.5
0
25
4000
3000
VIN = 5V
Region of Stability
(SOA)
Instability
Region
2000
1000
0
45
65
85
105
125
CASE TEMPERATURE (°C)
Figure 9. Maximum Power Dissipation
REV. 1.0.7 11/10/03
0
1
2
3
4
5
6
7
8
9
10
VOUT (V)
Figure 11. Stability Region (SOA) vs. ESR of the COUT
5
PRODUCT SPECIFICATION
FAN1086
Mechanical Dimensions
3-Lead TO-263 Package
Symbol
Inches
Millimeters
Notes
Min.
Max.
Min.
Max.
A
b
b2
c2
D
E
e
.160
.020
.190
.036
4.06
0.51
4.83
0.91
L
L1
L2
R
α
.575
.090
—
.017
0°
.049
.051
.045
.055
.340
.380
.380
.405
.100 BSC
.625
.110
.055
.019
8°
1.25
1.30
1.14
1.40
8.64
9.65
9.65
10.29
2.54 BSC
14.61
2.29
—
0.43
0°
Notes:
1. Dimensions are exclusive of mold flash and metal burrs.
2. Standoff-height is measured from lead tip with ref. to Datum -B-.
3. Foot length is measured with ref. to Datum -A- with lead surface
(at inner R).
4. Dimensiuon exclusive of dambar protrusion or intrusion.
5. Formed leads to be planar with respect to one another at seating
place -C-.
15.88
2.79
1.40
0.78
8°
E
@PKG/
@HEATSINK
L2
c2
D
E-PIN
L
R (2 PLCS)
b2
L1
b
e
-B-
-A-
A
-C-
6
REV. 1.0.7 11/10/03
FAN1086
PRODUCT SPECIFICATION
Mechanical Dimensions
4-Lead SOT-223 Package
Inches
Symbol
A
A1
B
c
D
E
e
F
H
I
J
K
L
M
N
Millimeters
Min.
Max.
Min.
Max.
—
—
.025
—
.248
.130
.071
.181
1.80
4.80
.033
.090
.264
.148
—
—
.640
—
6.30
3.30
.840
2.29
6.71
3.71
.115
.033
.264
.012
—
10°
.0008
10°
.010
.124
.041
.287
—
10°
16°
.0040
16°
.014
2.95
.840
6.71
.310
—
10°
.0203
10°
.250
3.15
1.04
7.29
—
10°
16°
.1018
16°
.360
Notes
D
e
K
A
H
E
N
J
M
B
I
L
A1
c
REV. 1.0.7 11/10/03
F
7
PRODUCT SPECIFICATION
FAN1086
Mechanical Dimensions
3-Lead TO-252 Package
Inches
Symbol
Min.
A
b
b2
b3
c
c2
D
E
e
H
L
L1
L3
L4
Max.
Millimeters
Min.
Notes:
Notes
Max.
.086
.094
.025
.035
.030
.045
.205
.215
.018
.024
.018
.023
.210
.245
.250
.265
.090 BSC
.370
.410
2.19
2.39
0.64
0.89
0.76
1.14
5.21
5.46
0.46
0.61
0.46
0.58
5.33
6.22
6.35
6.73
2.29 BSC
9.40
10.41
.055
.070
.108 REF
.035
.080
.025
.040
1.40
1.78
2.74 REF
0.89
2.03
0.64
1.02
4
1.
Dimensions are exclusive of mold flash and metal burrs.
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 dimensions b3 and L3
5.
Formed leads to be planar with respect to one another at seating
plane -C-.
6.
Dimensions and tolerances per ASME Y14.5M-1994.
1
1
3
4
E
@PKG/
@HEATSINK
L3
b3
c2
D
E-PIN
L4
H
b2
L1
L
c
b
e
-B-
α = 0°–10°
-A-
A
-C-
8
REV. 1.0.7 11/10/03
PRODUCT SPECIFICATION
FAN1086
Ordering Information
Product Number
Package
FAN1086DX
TO-252
FAN1086MX
TO-263
FAN1086SX
SOT-223
FAN1086D25X
TO-252
FAN1086M25X
TO-263
FAN1086S25X
SOT-223
FAN1086D285X
TO-252
FAN1086M285X
TO-263
FAN1086S285X
SOT-223
FAN1086D33X
TO-252
FAN1086M33X
TO-263
FAN1086S33X
SOT-223
FAN1086D5X
TO-252
FAN1086M5X
TO-263
FAN1086S5X
SOT-223
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.
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