OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

FAN1084T

P1-P3P4-P6P7-P9P10-P12P13-P13
www.fairchildsemi.com
REV. 1.0.8 11/10/03
Features
• Fast transient response
• Low dropout voltage at up to 4.5A
• Load regulation: 0.5% typical
• On-chip thermal limiting
• Standard TO-220, TO-263 center cut, and TO-252
packages
Applications
• Desktop PCs, RISC and embedded processors’ supply
• GTL, SSTL logic Reference bus supply
• Low voltage V
CC
logic supply
• Battery-powered circuitry
• Post regulator for switching supply
• Cable and ADSL modems’ DSP core supply
• Set Top Boxes and Web Boxes modules’ supply
Description
The FAN1084, FAN1084-1.5, and FAN1084-3.3 are low
dropout three-terminal regulators with 4.5A output current
capability. These devices have been optimized for low voltage
applications including V
TT
bus termination, where transient
response and minimum input voltage are critical. The
FAN1084 is ideal for low voltage microprocessor applica-
tions requiring a regulated output from 1.5V to 3.6A with an
input supply of 5V or less. The FAN1084-1.5 offers fixed
1.5V with 4.5A current capabilities for GTL+ bus V
TT
termination. The FAN1084-3.3 offers a fixed 3.3V output
at 4.5A.
On-chip thermal limiting provides protection against any
combination of overload and ambient temperature that
would create excessive junction temperatures.
The FAN1084 series regulators are available in the industry-
standard TO-220, TO-263 center cut, and TO-252 (DPAK)
power packages.
Application Diagrams
10µF
22µF
124Ω
124Ω
V
IN
= 5V
2.5V at 4.5A
+
+
V
IN
ADJ
V
OUT
FAN1084
10µF
22µF
V
IN
= 3.3V
1.5V at 4.5A
+
+
V
IN
GND
V
OUT
FAN1084-1.5
FAN1084
4.5A Adjustable/Fixed Low Dropout Linear Regulator
FAN1084 PRODUCT SPECIFICATION
2 REV. 1.0.8 11/10/03
Pin Assignments
Absolute Maximum Ratings
Parameter Min. Max. Unit
V
IN
7V
Operating Junction Temperature Range 0 125 °C
Storage Temperature Range –65 150 °C
Lead Temperature (Soldering, 10 seconds) 300 °C
GNDOUT
FRONT VIEW
3-Lead Plastic TO-220
Θ
JC
=3°C/W*
3-Lead Plastic TO-263
Θ
JC
=3°C/W*
*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 may provide better power dissipation than 30°C/W.
†
FAN1084M-3.3 also available with uncut center lead.
FAN1084M-3.3
†
FAN1084M-1.5
IN
123
ADJ OUT
FRONT VIEW
IN
123
GND
FRONT VIEW
IN
123
FAN1084M
FAN1084T
FAN1084T-3.3
FAN1084T-1.5
ADJ
FRONT VIEW
IN
123
3-Lead Plastic TO-252
Θ
JC
=3°C/W*
FAN1084D-3.3
FAN1084D-1.5
GND
FRONT VIEW
IN
123
FAN1084D
ADJ
FRONT VIEW
IN
123
Tab is out.
Tab is out.
PRODUCT SPECIFICATION FAN1084
REV. 1.0.8 11/10/03 3
Electrical Characteristics
Operating Conditions: 4.75 ≤ V
IN
< 5.25V, T
j
= 25°C unless otherwise specified.
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. FAN1084 only.
4. Guaranteed by design.
5. FAN1084-1.5 only.
6. FAN1084-3.3 only.
Parameter Conditions Min. Typ. Max Units
Reference Voltage
3
Adj connected to ground, I
OUT
= 10mA 1.23 1.250 1.27 V
Output Voltage
5
I
OUT
= 10mA 1.475 1.5 1.525 V
Output Voltage
6
I
OUT
= 10mA 3.234 3.3 3.366 V
Line Regulation
1, 2
I
OUT
= 10mA 0.5 2 %
Load Regulation
1, 2
10mA ≤ I
OUT
≤ 4.5A 0.5 2.5 %
Dropout Voltage ∆V
REF%
= 2%, I
OUT
= 4.5A 1.5 V
Current Limit (V
IN
– V
OUT
) = 2V 5.5 A
Adjust Pin Current
3
35 100 µΑ
Mimimum Load Current
4
1.5V ≤ (V
IN
– V
OUT
) ≤ 5.75V 10 mA
Quiescent Current
4
V
IN
= 5V 4 mA
Thermal Resistance,
Junction to Case
TO-220 3 °C/W
TO-263 Center Cut, TO-252 3 °C/W
Thermal Shutdown
4
150 °C
Typical Performance Characteristics
Figure 1. Maximum Power Dissipation
20
15
10
5
0
25 45 65 85 105 125
POWER (W)
CASE TEMPERATURE
P1-P3P4-P6P7-P9P10-P12P13-P13

FAN1084T

Mfr. #:
Buy FAN1084T
Manufacturer:
ON Semiconductor / Fairchild
Description:
LDO Voltage Regulators 4.5A Adjustable LDO
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet