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

FAN1112DX

P1-P3P4-P6P7-P8
www.fairchildsemi.com
REV. 1.0.1 9/27/01
Features
• Low dropout voltage
• Load regulation: 0.05% typical
• Trimmed current limit
• On-chip thermal limiting
• Standard SOT-223 and TO-252 packages
• Three-terminal fixed 1.2V
Applications
• Post regulator for switching supplies
• Supply for low-voltage processors
Description
The FAN1112 is a 1.2V low dropout three-terminal
regulator with 1A output current capability. The device has
been optimized for low voltage where transient response and
minimum input voltage are critical.
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.
Unlike PNP type regulators where up to 10% of the output
current is wasted as quiescent current, the quiescent current
of the FAN1112 flows into the load, increasing efficiency.
The FAN1112 regulator is available in the industry-standard
SOT-223 and TO-252 (DPAK) power packages.
Typical Application
V
IN
= 3.3V V
IN
V
OUT
GND
1.2V at 1A
FAN1112
10µF
++
22µF
FAN1112
1A 1.2V Low Dropout Linear Regulator
PRODUCT SPECIFICATION FAN1112
2
REV. 1.0.1 9/27/01
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 50°C/W. Other mounting techniques may provide better thermal resistance than 30°C/W.
Absolute Maximum Ratings
Figure 1. Absolute Maximum Safe Operating Area
Parameter Min. Max. Unit
V
IN
18 V
(V
IN
– V
OUT
) * I
OUT
See Figure 1
Operating Junction Temperature Range 0 125
°
C
Storage Temperature Range -65 150
°
C
Lead Temperature (Soldering, 10 sec.) 300
°
C
Front View
Front View
4-Lead Plastic SOT-223
Θ
JC
= 15°C/W*
3-Lead Plastic TO-252
Θ
JC
= 3°C/W*
Tab is
V
OUT
Tab is V
OUT
1
GND OUT IN
23
3
2
1
IN
OUT
GND
1.2
1.0
0.8
0.6
0.4
0.2
0
068
10 12 14 16 18 2042
V
IN
– V
OUT
(V)
I
OUT
(A)
FAN1112 PRODUCT SPECIFICATION
REV. 1.0.1 9/27/01
3
Electrical Characteristics
Operating Conditions: V
IN
≤
7V, T
J
= 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 (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. Output current must be limited to meet the absolute maximum ratings of the part.
Parameter Conditions Min. Typ. Max. Units
Output Voltage
3
10mA
≤
I
OUT
≤
1A
FAN1112, 3.0V
≤
V
IN
≤
7.2V
•
1.140 1.200 1.260 V
Line Regulation
1,2
3.0V
≤
V
IN
≤
12V, I
OUT
= 10mA
•
0.005 0.2 %
Load Regulation
1,2
(V
IN
– V
OUT
) = 2V, 10mA
≤
I
OUT
≤
1A
•
0.05 0.5 %
Dropout Voltage
∆
V
REF
= 1%, I
OUT
= 1A
•
1.100 1.200 V
Current Limit (V
IN
– V
OUT
) = 2V
•
1.1 1.5 A
GND Pin Current
•
35 120
µ
A
GND Pin Current Change 3.0V
≤
V
IN
≤
7V, 10mA
≤
I
OUT
≤
1A
•
0.2 5
µ
A
Minimum Load Current 3.0V
≤
V
IN
≤
15V
•
10 mA
Quiescent Current V
IN
= 7V
•
413mA
Ripple Rejection f = 120Hz, C
OUT
= 22
µ
F Tantalum,
(V
IN
– V
OUT
) = 3V, I
OUT
= 1A
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, 1000hrs. 0.03 1.0 %
RMS Output Noise
(% of V
OUT
)
T
A
= 25
°
C, 10Hz
≤
f
≤
10kHz 0.003 %
Thermal Resistance, Junction
to Case
SOT-223 15
°
C/W
TO-252 3
°
C/W
Thermal Shutdown Junction Temperature 155
°
C
Thermal Shutdown
Hysteresis
10
°
C
P1-P3P4-P6P7-P8

FAN1112DX

Mfr. #:
Buy FAN1112DX
Manufacturer:
ON Semiconductor / Fairchild
Description:
LDO Voltage Regulators Low Dropout Linear
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet