1A LOW DROPOUT LINEAR REGULATOR
FSP1117
FEATURES
Low Dropout Voltage: 1.15V at 1A Output Current
Trimmed Current Limit
On-chip Thermal Shutdown
Three-terminal Adjustable or Fixed 1.2V, 1.5V, 1.8V,
2.5V, 3.3V, 5.0V
GENERAL DESCRIPTION
The FSP1117 is a series of low dropout three-terminal
regulators with a dropout of 1.15V at 1A output current.
The FSP1117 series provides current limiting and
thermal shutdown. Its circuit includes a trimmed
bandgap reference to assure output voltage accuracy
to be within 1% for 1.5V, 1.8V, 2.5V, 3.3.V, 5.0V and
adjustable versions or 2% for 1.2V version. Current
limit is trimmed to ensure specified output current and
controlled short-circuit current. On-chip thermal
shutdown provides protection against any combination
of overload and ambient temperature that would create
excessive junction temperature.
The FSP1117 has an adjustable version that can
provide the output voltage from 1.25V to 12V with only
two external resistors.
The FSP1117 series is available in the industry
standard TO220-3L, TO263-3L, TO252-2L and
SOT223 power packages.
(3) TO252-2L
V
IN
V
OUT
ADJ/GND
3
2
1
Metal Tab V
OUT
V
OUT
ADJ/GND
V
IN
APPLICATIONS
PC Motherboard
LCD Monitor
Graphic Card
DVD-video player
NIC/Switch
Telecom Equipment
ADSL Modem
Printer and other Peripheral Equipment
PIN CONFIGURATION
(1) TO220-3L
3
2
1
Metal Tab V
OUT
V
IN
V
OUT
ADJ/GND
(2) TO263-3L
3
2
1
Metal Tab V
OUT
(4) SOT223
3
2
1
Metal Tab V
OUT
V
IN
V
OUT
ADJ/GND
BLOCK DIAGRAM
3 INPUT
For Adjustable Output, disconnect A1 and A2, connect B
For Fixed Output,connect A1 and A2, disconnect B
A1
B
A2
1 ADJ/GND
1/10
-
+
Thermal
Protection
2 OUTPUT
2007-4-9
1A LOW DROPOUT LINEAR REGULATOR
FSP1117
ABSOLUTE MAXIMUM RATINGS (NOTE 1)
Symbol
Parameter
Rating
Unit
V
IN
Input Voltage
20
V
T
J
Maximum Junction Temperature
150
℃
T
S
Storage Temperature
-65~150
℃
T
LEAD
Lead Temperature (10 sec.)
300
℃
ESD
ESD (Machine Model)
600
V
Note 1: Stresses greater than those listed under“Absolute Maximum Ratings” may cause permanent damage to the
device. These are stress rating only, and functional operation of the device at these or any other conditions beyond
those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum
Ratings” for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
IN
T
J
Parameter
Input Voltage
Operating Junction Temperature Range
Rating
15
-40~125
Unit
V
℃
ELECTRICAL CHARACTERISTICS
Operating Conditions: V
IN
≤10V,
T
J
=25
℃
, unless otherwise specified
Parameter
Reference
Voltage
Symbol
V
REF
FSP1117 -adj
FSP1117 -1.2
FSP1117 -1.5
FSP1117 -1.8
Output Voltage
V
OUT
FSP1117 -2.5
FSP1117 -3.3
FSP1117 -5.0
Reg
LINE
Line Regulation
ΔV
OUT
FSP1117 -adj
FSP1117
-1.2/1.5/1.8/2.5/
3.3
FSP1117 -5.0
FSP1117 -adj
Test Condition
I
O
=10mA, V
IN
-V
OUT
=2V
I
O
=10mA~1A,1.4V≤V
IN
-V
OUT
≤8
V
I
O
=10mA, V
IN
=3.2V
I
O
=10mA~1A, 3V≤V
IN
≤10V
I
O
=10mA, V
IN
=3.5V
I
O
=10mA~1A, 3V≤V
IN
≤10V
I
O
=10mA, V
IN
=3.8V
I
O
=10mA~1A, 3.2V≤V
IN
≤10V
I
O
=10mA, V
IN
=4.5V
I
O
=10mA~1A, 3.9V≤V
IN
≤10V
I
O
=10mA, V
IN
=5.0V
I
O
=10mA~1A, 4.75V≤V
IN
≤10V
I
O
=10mA, V
IN
=7.0V
I
O
=10mA~1A, 6.5V≤V
IN
≤12V
I
O
=10mA,1.5V≤V
IN
-V
OUT
≤10V,
I
O
=10mA,1.5V≤V
IN
-V
OUT
≤10V
I
O
=10mA,1.5V≤V
IN
-V
OUT
≤10V
I
O
=10mA~1A, V
IN
-V
OUT
=2V
I
O
=10mA~1A, V
IN
-V
OUT
=2V
ΔV
REF
=1%,I
OUT
=0.1A
ΔV
REF
=1%,I
OUT
=0.5A
ΔV
REF
=1%,I
OUT
=1.0A
ΔV
OUT
=1%,I
OUT
=0.1A
ΔV
OUT
=1%,I
OUT
=0.5A
ΔV
OUT
=1%,I
OUT
=1.0A
V
IN
-V
OUT
=2V
Min.
1.238
1.225
1.176
1.152
1.485
1.470
1.782
1.746
2.475
2.450
3.267
3.235
4.950
4.900
Typ.
1.250
1.250
1.2
1.2
1.5
1.5
1.8
1.8
2.5
2.5
3.3
3.3
5.0
5.0
0.035
1
1
0.2
0.1
1.00
1.08
1.15
1.00
1.08
1.15
1.35
Max.
1.262
1.270
1.224
1.248
1.515
1.530
1.818
1.854
2.525
2.550
3.333
3.365
5.050
5.100
0.2
6
10
0.4
0.3
1.1
1.18
1.25
1.1
1.18
1.25
Unit
V
V
V
V
V
V
V
V
%
mV
mV
%
%
Load Regulation
Reg
Load
FSP1117 -adj
Dropout Voltage
(V
IN
-V
OUT
)
V
Current Limit
I
LIMT
1.25
A
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2007-4-9
1A LOW DROPOUT LINEAR REGULATOR
FSP1117
ELECTRICAL CHARACTERISTICS (CONTINUED)
Operating Conditions: V
IN
≤10V,
T
J
=25
℃
, unless otherwise specified
Parameter
Adjust Pin Current
Adjust Pin Current Change
Minimum Load Current(ADJ)
Quiescent Current
Ripple Rejection
Temperature Stability
Long-term Stability
RMS Output Noise
(% of V
OUT
)
Thermal Resistance,
Junction to case
Thermal Shutdown
Thermal Shutdown
Hysteresis
θ
JC
Symbol
Test Condition
I
O
=10mA~1A, 1.5V≤V
IN
-V
OUT
≤10V
I
O
=10mA~1A, 1.4V≤V
IN
-V
OUT
≤10V
FSP1117 E
1.5V≤V
IN
-V
OUT
≤10V
FSP1117
V
IN
=V
OUT
+1.25V
f=120Hz,C
OUT
=22uF Tantalum,
V
IN
-V
OUT
=3V, I
OUT
=1A
T
A
=125℃, 1000hrs
T
A
=25℃, 10Hz≤f≤10kHz
SOT223
TO252-2L
TO220-3L
TO263-3L
Junction Temperature
Min.
Typ.
60
0.2
1.7
5
5
75
0.5
0.3
0.003
15
10
4.5
4
150
25
Max.
120
5
5
10
10
Unit
µA
µA
mA
mA
mA
dB
%
%
%
℃/
W
℃
℃
60
TYPICAL APPLICATIONS
FSP1117-ADJ
Vin
10µF
Tantalum
+
Vin
ADJ
Vout
R1
+
Vout
22µF
Tantalum
R2
Vout=Vref*(1+R2/R1)+Iadj*R2
Vin
10µF
Tantalum
+
FSP1117-5.0
Vin
GND
Vout
+
Vout
22µF
Tantalum
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2007-4-9
1A LOW DROPOUT LINEAR REGULATOR
FSP1117
TYPICAL PERFORMANCE CHARACTERISTICS
1.2
Dropout Voltage (V)
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.2
0.4
0.6
0.8
Output Current (A)
1.0
T
A
=125℃
Dropout Voltage vs Output Current
0.2
Output Voltage Deviation (%)
Load Regulation vs Junction Temperature
FSP1117-ADJ
0.1
0.0
-0.1
-0.2
-50
T
A
=0℃
T
A
=25℃
-25
0
25
50
75 100
Junction Temperature (℃)
125
Reference Voltage vs Junction Temperature
1.280
1.275
Reference Voltage (V)
Output Voltage (V)
3.40
3.35
3.30
3.25
3.20
3.15
3.10
-50
Output Voltage vs Junction Temperature
1.270
1.265
1.260
1.255
1.250
1.245
1.240
1.235
-50 -25 0
25 50 75 100 125
Junction Temperature (℃)
FSP1117-3.3V
-25
0
25
50
75 100
Junction Temperature (℃)
125
5
Minimum Load Current (mA)
4
3
2
1
0
Minimum Load Current vs Junction Temperature
Adjust Pin Current vs Junction Temperature
90
Adjust Pin Current (µA)
80
70
60
50
40
30
20
10
0
-50 -25 0
25 50 75 100 125
Junction Temperature (℃)
-50
-25
0
25
50
75 100
Junction Temperature (℃)
125
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2007-4-9
1A LOW DROPOUT LINEAR REGULATOR
FSP1117
TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED)
2.0
Short-Circuit Current (A)
1.8
7.5
1.6
1.4
1.2
1.0
-50
Power (W)
SOT223
5.0
2.5
0.0
25
Short-Circuit Current vs Junction Temperature
10.0
Maximum Power Dissipation
-25
0
25
50
75 100
Junction Temperature (℃)
125
50
75
100
Case Temperature (℃
125
Line Transient Response
Ripple Rejection vs Frequency
70
Ripple Rejection (dB)
60
50
40
30
20
Load Transient Response
10
100
10k
1k
Frequency (Hz)
100k
2007-4-9
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电源技术
