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Электронный компонент: FAN1585AT15

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www.fairchildsemi.com
REV. 1.1.5 11/7/03
Features
Fast transient response
Low dropout voltage at up to 5A
Load regulation: 0.05% typical
Trimmed current limit
On-chip thermal limiting
Standard TO-220, TO-263 and TO-263 center cut packages
Applications
AGTL+ bus supply for FC-PGA
Low voltage logic supply
Post regulator for switching supply
3.3V to 1.5V linear regulator
5V to 1.8V linear regulator
Description
The FAN1585A, FAN1585A-1.5, and FAN1585A-1.8 are
low dropout three-terminal regulators with 5A output current
capability. These devices have been optimized for low volt-
age applications including V
TT
bus termination for FC-PGA,
where transient response and minimum input voltage are
critical. The FAN1585A-1.5 offers fixed 1.5V with 5A
current capabilities for AGTL+ bus V
TT
termination for
FC-PGA. The FAN1585A is ideal for low voltage micro-
processor applications requiring a regulated output from
1.5V to 3.6V with an input supply of 5V or less, or for
FC-PGA applications with significant trace resistance.
Current limit is trimmed to ensure specified output current
and controlled short-circuit current. On-chip thermal limit-
ing provides protection against any combination of overload
and ambient temperature that would create excessive junc-
tion temperatures.
The FAN1585A series regulators are available in the industry-
standard TO-220, TO-263 and TO-263 center cut power
packages.
Typical Applications
V
IN = 3.3V
22
F
22
F
22
F
22
F
1.5V at 5A
R1
124
R2
24.9
+
+
V
IN
ADJ
V
OUT
FAN1585A
V
IN = 3.3V
1.5V at 5A
+
+
V
IN
GND
V
OUT
FAN1585A-1.5
V
OUT
= V
REF
(1
+
R2/R1) + I
Adj
R2
FAN1585A
5A Adjustable/Fixed Low Dropout Linear Regulator
FAN1585A
PRODUCT SPECIFICATION
2
REV. 1.1.5 11/7/03
Pin Assignments
*With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane,
JA
can vary from
30C/W to more than 40C/W. Other mounting techniques can provide a thermal resistance lower than 30C/W.
Absolute Maximum Ratings
Absolute Maximum Safe Operating Area
Parameter
Min.
Max.
Unit
V
IN
18
V
Operating Junction Temperature Range
0
125
C
Storage Temperature Range
-65
150
C
Lead Temperature (Soldering, 10 sec.)
300
C
ADJ OUT
FRONT VIEW
3-Lead Plastic TO-220
JC
= 3
C/W
IN
ADJ
FRONT VIEW
3-Lead Plastic TO-263
JC
= 3
C/W*
IN
1
2
3
1
2
3
GND OUT
OUT
OUT
FRONT VIEW
IN
1
2
3
GND
FRONT VIEW
FAN1585AM
FAN1585AM-1.5
FAN1585AM-1.8
FAN1585AT-1.5
FAN1585AT-1.8
FAN1585AT
IN
1
2
3
ADJ
FRONT VIEW
3-Lead Plastic TO-263 Center Cut
JC
= 3
C/W*
IN
Tab is Out.
Tab is Out.
Tab is Out.
1
2
3
GND
FRONT VIEW
FAN1585AMC
FAN1585AMC-1.5
FAN1585AMC-1.8
IN
1
2
3
V
IN
V
OUT
(V)
I
OUT
(Amps)
0
2
4
6
8
12
10
14
7
6
5
4
3
2
1
0
PRODUCT SPECIFICATION
FAN1585A
REV. 1.1.5 11/7/03
3
Electrical Characteristics
Tj = 25C unless otherwise specified.
The
denotes specifications which apply over the specified operating temperature range.
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 currrent. Guaranteed maximum output power will not be available over the full input/output
voltage range.
3. FAN1585A only.
4. FAN1585A-1.5 only.
5. FAN1585A-1.8 only.
Parameter
Conditions
Min.
Typ.
Max
Units
Reference Voltage
3
1.5V
(V
IN
V
OUT
)
5.75V,
10mA
I
OUT
5A
1.225
(-2%)
1.250
1.275
(+2%)
V
Output Voltage
4
3.0V
V
IN
8V
10mA
I
OUT
5A
1.47
1.5
1.53
V
Output Voltage
5
3.3V
V
IN
8.3V
10mA
I
OUT
5A
1.764
1.8
1.836
V
Line Regulation
1, 2
(V
OUT
+ 1.5V)
V
IN
12V,
I
OUT
=
10mA
0.005
0.2
%
Load Regulation
1, 2, 3
(V
IN
V
OUT
) = 3V,
10mA
I
OUT
5A
0.05
0.5
%
Dropout Voltage
V
REF
= 1%, I
OUT
= 5A
1.150
1.300
V
Current Limit
(V
IN
V
OUT
) = 2V
5.1
5.9
A
Adjust Pin Current
3
35
120
A
Adjust Pin Current Change
3
1.5V
(V
IN
V
OUT
)
5.75V,
10mA
I
OUT
5A
0.2
5
A
Minimum Load Current
1.5V
(V
IN
V
OUT
)
12V
10
mA
Quiescent Current
V
IN
= 5V
4
13
mA
Ripple Rejection
f = 120Hz, C
OUT
= 22
F Tantalum,
(V
IN
V
OUT
) = 3V, I
OUT
= 5A
60
72
dB
Thermal Regulation
T
A
= 25
C, 30ms pulse
0.004
0.02
%/W
Temperature Stability
0.5
%
Long-Term Stability
T
A
= 125
C, 1000 hrs.
0.03
1.0
%
RMS Output Noise
(% of V
OUT
)
T
A
= 25
C, 10Hz
f
10kHz
0.003
%
Thermal Resistance,
Junction to Case
TO-220
3
C/W
TO-263
3
C/W
Thermal Shutdown
150
C
FAN1585A
PRODUCT SPECIFICATION
4
REV. 1.1.5 11/7/03
Typical Performance Characteristics
Figure 1. Dropout Voltage vs. Output Current
Figure 2. Load Regulation vs. Temperature
Figure 3. Reference Voltage vs. Temperature
Figure 4. Output Voltage vs. Temperature
Figure 5. Minimum Load Current vs. Temperature
Figure 6. Adjust Pin Current vs. Temperature
1
2
3
OUTPUT CURRENT (A)
DROPOUT VOLTAGE (V)
4
5
6
0
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
T=25
C
T=0
C
T=125
C
JUNCTION TEMPERATURE (
C)
OUTPUT VOLTAGE DEVIATION (%)
-75 -50 -25
0
25
50
75 100 125 150 175
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
I = 5A
JUNCTION TEMPERATURE (
C)
REFERENCE VOLTAGE (V)
-75 -50 -25
0
25
50
75 100 125 150 175
3.70
3.65
3.60
3.55
3.50
3.45
3.40
3.35
3.30
3.25
3.20
V
OUT
set with 1% Resistors
V
OUT
= 3.6V
1
V
OUT
= 3.3V
1
Note:
1. FAN1585A Only
JUNCTION TEMPERATURE (
C)
REFERENCE VOLTAGE (V)
-75 -50 -25
0
25
50
75 100 125 150 175
1.275
1.270
1.265
1.260
1.255
1.250
1.245
1.240
1.235
1.230
1.225
JUNCTION TEMPERATURE (
C)
MINIMUM LOAD CURRENT (mA)
-75 -50 -25
0
25
50
75 100 125 150 175
5
4
3
2
1
0
JUNCTION TEMPERATURE (
C)
ADJUST PIN CURRENT (
A)
-75 -50 -25
0
25
50
75 100 125 150 175
100
90
80
70
60
50
40
30
20
10
0
Note:
1. FAN1585A Only
PRODUCT SPECIFICATION
FAN1585A
REV. 1.1.5 11/7/03
5
Typical Performance Characteristics
(continued)
Figure 7. Short-Circuit Current vs. Temperature
Figure 8. Ripple Rejection vs. Frequency
Figure 9. Maximum Power Dissipation
Figure 10. Stability Region V
IN
/V
OUT
= 5V/1.5V
JUNCTION TEMPERATURE (
C)
SHORT-CIRCUIT CURRENT (A)
-75 -50 -25
0
25
50
75 100 125 150 175
8.0
7.0
6.0
5.0
4.0
FREQUENCY (Hz)
RIPPLE REJECTIONS (dB)
10
100
1K
10K
100K
90
80
70
60
50
40
30
20
10
0
(V
IN
V
OUT
)
3V
0.5V
V
RIPPLE
2V
I
OUT
= 5A
CASE TEMPERATURE (
C)
POWER (W)
50
60
70
80
90 100 110 120 130 140 150
20
15
10
5
0
0
0.5
1
1.5
2
2.5
0
1000
2000
3000
4000
5000
LOAD CURRENT (mA)
OUTPUT CAPACITANCE ESR, (
)
Area of Instability
Stable Area