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FAN1585AM18X

P1-P3P4-P6P7-P9P10-P12P13-P13
www.fairchildsemi.com
REV. 1.1.6 7/8/05
Features
•Fast transient response
•Low dropout voltage at up to 5A
• Load regulation: 0.05% typical
•Trimmed current limit
• On-chip thermal limiting
•Packages: TO-220, TO-252, TO-263 and TO-263 Centercut
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-252, TO-263 and TO-263 Centercut
power packages.
Typical Applications
V
IN
= 3.3V
22µF
22µF
22µF
22µF
1.5V at 5A
R1
124Ω
R2
24.9Ω
+
+
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. 1.1.6 7/8/05
Pin Assignments
*With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, θ
JA
can vary from
30°C/W to more than 40°C/W. Other mounting techniques can provide a thermal resistance lower than 30°C/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
3-Lead Plastic TO-220
θ
JC
= 3°C/W
3-Lead Plastic TO-252
θ
JC
= 3°C/W
ADJ/
GND
FRONT VIEW
3-Lead Plastic TO-263
θ
JC
= 3°C/W*
IN
12 3
ADJ/
GND
OUT OUT
FRONT VIEW
FRONT VIEW
IN
12 3
ADJ/
GND
FRONT VIEW
3-Lead Plastic TO-263 Center Cut
θ
JC
= 3°C/W*
IN
Tab is Out.
Tab is Out.
Tab is Out.
12 3
Tab is V
OUT
1
ADJ/
GND
OUT IN
23
V
IN
–V
OUT
(V)
I
OUT
(Amps)
02468 1210 14
7
6
5
4
3
2
1
0
PRODUCT SPECIFICATION FAN1585A
REV. 1.1.6 7/8/05 3
Electrical Characteristics
Tj = 25°C 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 µA
Adjust Pin Current Change
3
1.5V ≤ (V
IN
– V
OUT
) ≤ 5.75V,
10mA ≤ I
OUT
≤ 5A
• 0.2 5 µA
Minimum Load Current 1.5V ≤ (V
IN
– V
OUT
) ≤ 12V • 10 mA
Quiescent Current V
IN
= 5V • 413mA
Ripple Rejection f = 120Hz, C
OUT
= 22µF 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, TO-252, TO-263, and
TO-263 CC
3 °C/W
Thermal Shutdown 150 °C
P1-P3P4-P6P7-P9P10-P12P13-P13

FAN1585AM18X

Mfr. #:
Buy FAN1585AM18X
Manufacturer:
ON Semiconductor / Fairchild
Description:
LDO Voltage Regulators 5a Linear Regulator adj/Fixed LDO
Lifecycle:
New from this manufacturer.
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