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LD1117
SERIES
LOW DROP FIXED AND ADJUSTABLE
POSITIVE VOLTAGE REGULATORS
n
LOW DROPOUT VOLTAGE (1V TYP)
2.85V DEVICE PERFORMANCES ARE
SUITABLE FOR SCSI-2 ACTIVE
TERMINATION
n
OUTPUT CURRENT UP TO 800mA
n
SOT-223
SO-8
FIXED OUTPUT VOLTAGE OF: 2.5V, 2.85V,
3.0V, 3.3V, 5.0V
n
ADJUSTABLE VERSION AVAILABILITY
(V
ref
=1.25V)
n
INTERNAL CURRENT AND THERMAL LIMIT
n
1% (AT 25
o
C) AND 2% IN
ALL TEMPERATURE RANGE
n
AVAILABLE IN
±
SUPPLY VOLTAGE REJECTION : 75 dB (TYP)
n
TEMPERATURE RANGE : 0
o
C TO 125
o
C
n
DESCRIPTION
The LD1117 is a LOW DROP Voltage Regulator
able to provide up to 800mA of Output Current,
available even in adjustab le version
(V
ref
=1.25V). Concerning fixed versions, are
offered the following Output Voltages: 2.5V,
2.85V, 3.0V 3.3V and 5.0V. The 2.85V type is
ideal for SCSI-2 lines active termination. The
device is supplied in: SOT-223, DPAK, SO-8
and TO-220. The SOT-223 and DPAK surface
mount packages optimize the thermal
characteristics even offering a relevant space
saving effect. High efficency is assured by NPN
TO-252 (DPAK)
TO-220
pass transistor. In fact in this case, unlike than
PNP one, the Quiescent Current flows mostly
into the load. Only a very common 10
m
F
minimum capacitor is neede d for stability. On
chip trimming allows the regulator to reach a
very tight output voltage tolerance, within
±
o
1%
BLOCK DIAGRAM
April 1998
1/17
at 25
C. The ADJUSTABLE LD1117 is pin to
pin compatible with the other standard
Adjustable voltage regulators maintaining the
bette r performances in terms of Drop and
Tolerance.
LD1117 SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
IN
DC Input Voltage
15
V
P
tot
Power Dissipation
12
W
T
stg
Storage Temperature Range
-40 to 150
o
C
o
C
Absolute Maximum Ratings are those value beyond which damage to the device may occur. Functional operation under these condition is
not implied. Over the above suggested Max Power Dissipation a Short Circuit could definetively damage the device.
Operating Junction Temperature Range
0 t o 125
THERMAL DATA
Symbol
Parameter
SOT-223
SO-8
DPAK
TO-220
Unit
R
thj-case
R
th j-a mb
Thermal Resistance Junction-case
Thermal Resistance Junction-ambient
15
20
8
3
50
o
C/W
o
C/W
APPLICATION CIRCUIT
2/17
T
op
LD1117 SERIES
CONNECTION DIAGRAM AND ORDERING NUMBERS
(top view)
SOT-223
SO-8
DPAK
TO-220
SOT-223
SO-8
DPAK
TO-220
Output Voltage
LD1117S25
LD1117S25C
LD1117S28
LD1117S30
LD1117S30C
LD1117S33
LD1117S33C
LD1117S50
LD1117S50C
LD1117D25
LD1117D25C
LD1117D28
LD1117D30
LD1117D30C
LD1117D33
LD1117D33C
LD1117D50
LD1117D50C
LD1117DT25
LD1117DT25C
LD1117DT28
LD1117DT30
LD1117DT30C
LD1117DT33
LD1117DT33C
LD1117DT50
LD1117DT50C
LD1117V25
LD1117V25C
LD1117V28
LD1117V30
LD1117V30C
LD1117V33
LD1117V33C
LD1117V50
LD1117V50C
2.5V
2.5V
2.85V
3V
3V
3.3V
3.3V
5V
5V
LD1117S
LD1117D
LD1117DT
LD1117V
ADJUST ABLE
FROM 1.25 TO 15V
3/17
LD1117 SERIES
ELECTRICAL CHARACTERISTICS FOR LD1117#25
(refer to the test circuits,
T
j
= 0 to 125
o
C, C
o
=10
m
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
V
in
= 4.5 V I
o
=10mA T
j
=25
o
C
2.475
2.5
2.525
V
V
o
Output Voltage
I
o
= 0 to 800 mA V
in
= 3.9 to 10 V
2.45
2.55
V
D
V
o
Line Regulation
V
in
= 3.9 to 10 V I
o
=0mA
1
6
mV
D
V
o
Load Regulation
V
in
= 3.9 V I
o
= 0 to 800 mA
1
10
mV
D
V
o
Temperature Stability
0. 5
%
D
V
o
Long Term Stability
1000 hrs T
j
= 125
o
C
0. 3
%
V
in
Operating Input Voltage
I
o
= 100 mA
15
V
I
d
Quiescent Current
V
in
3
10 V
5
10
mA
I
o
Output Current
V
in
= 7.5 V T
j
=25
o
C
800
950
1200
mA
eN
Output Noise Voltage
B = 10Hz to 10KHz T
j
=25
o
C
100
m
V
SVR Supply Voltage Rejection
I
o
= 40 mA f = 120 Hz T
j
=25
o
C
V
in
= 5.5 V V
ripple
= 1 Vpp
60
75
dB
V
d
Dropout Voltage
I
o
= 100 mA
I
o
= 500 mA
I
o
= 800 mA
1
1.05
1.10
1.1
1.15
1.2
V
V
V
Thermal Regulation
T
a
=25
o
C 30ms Pulse
0.01
0.1
%/W
ELECTRICAL CHARACTERISTICS FOR LD1117#28
(refer to the test circuits,
T
j
= 0 to 125
o
C, C
o
=10
m
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
V
in
= 4.85 V I
o
=10mA T
j
=25
o
C
2.82
2.85
2.88
V
V
o
Output Voltage
I
o
= 0 to 800 mA V
in
= 4.25 to 10 V
2.79
2.91
V
D
V
o
Line Regulation
V
in
= 4.25 to 10 V I
o
=0 mA
1
6
mV
D
V
o
Load Regulation
V
in
= 4.25 V I
o
=0to800mA
1
10
mV
D
V
o
Temperature Stability
0. 5
%
D
V
o
Long Term Stability
1000 hrs T
j
= 125
o
C
0. 3
%
V
in
Operating Input Voltage
I
o
= 100 mA
15
V
I
d
Quiescent Current
V
in
3
10 V
5
10
mA
I
o
Output Current
V
in
= 7.85 V T
j
=25
o
C
800
950
1200
mA
eN
Output Noise Voltage
B = 10Hz to 10KHz T
j
=25
o
C
100
m
V
SVR Supply Voltage Rejection
I
o
= 40 mA f = 120 Hz T
j
=25
o
C
V
in
= 5.85 V V
ripple
= 1 Vpp
60
75
dB
V
d
Dropout Voltage
I
o
= 100 mA
I
o
= 500 mA
I
o
= 800 mA
1
1.05
1.1
1.1
1.15
1.2
V
V
V
Thermal Regulation
T
a
=25
o
C 30ms Pulse
0.01
0.1
%/W
4/17
LD1117 SERIES
ELECTRICAL CHARACTERISTICS FOR LD1117#30
(refer to the test circuits,
T
j
= 0 to 125
o
C, C
o
=10
m
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
V
in
=5V I
o
=10mA T
j
=25
o
C
2.97
3
3.03
V
V
o
Output Voltage
I
o
= 0 to 800 mA V
in
= 4.5 to 10 V
2.94
3.06
V
D
V
o
Line Regulation
V
in
= 4.5 to 12 V I
o
=0mA
1
6
mV
D
V
o
Load Regulation
V
in
= 4.5 V I
o
= 0 to 800 mA
1
10
mV
D
V
o
Temperature Stability
0. 5
%
D
V
o
Long Term Stability
1000 hrs T
j
= 125
o
C
0. 3
%
V
in
Operating Input Voltage
I
o
= 100 mA
15
V
I
d
Quiescent Current
V
in
3
12 V
5
10
mA
I
o
Output Current
V
in
=8V T
j
=25
o
C
800
950
1200
mA
eN
Output Noise Voltage
B = 10Hz to 10KHz T
j
=25
o
C
100
m
V
SVR Supply Voltage Rejection
I
o
= 40 mA f = 120 Hz T
j
=25
o
C
V
in
=6V V
ripple
= 1 Vpp
60
75
dB
V
d
Dropout Voltage
I
o
= 100 mA
I
o
= 500 mA
I
o
= 800 mA
1
1.05
1.1
1.1
1.15
1.2
V
V
V
Thermal Regulation
T
a
=25
o
C 30ms Pulse
0.01
0.1
%/W
ELECTRICAL CHARACTERISTICS FOR LD1117#33
(refer to the test circuits,
T
j
= 0 to 125
o
C, C
o
=10
m
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
V
in
= 5.3 V I
o
=10mA T
j
=25
o
C
3.267
3.3
3.333
V
V
o
Output Voltage
I
o
= 0 to 800 mA V
in
= 4.75 to 10 V
3.235
3.365
V
D
V
o
Line Regulation
V
in
= 4.75 to 15 V I
o
=0 mA
1
6
mV
D
V
o
Load Regulation
V
in
= 4.75 V I
o
=0to800mA
1
10
mV
D
V
o
Temperature Stability
0. 5
%
D
V
o
Long Term Stability
1000 hrs T
j
= 125
o
C
0. 3
%
V
in
Operating Input Voltage
I
o
= 100 mA
15
V
I
d
Quiescent Current
V
in
3
15 V
5
10
mA
I
o
Output Current
V
in
= 8.3 V T
j
=25
o
C
800
950
1200
mA
eN
Output Noise Voltage
B = 10Hz to 10KHz T
j
=25
o
C
100
m
V
SVR Supply Voltage Rejection
I
o
= 40 mA f = 120 Hz T
j
=25
o
C
V
in
= 6.3 V V
ripple
= 1 Vpp
60
75
dB
V
d
Dropout Voltage
I
o
= 100 mA
I
o
= 500 mA
I
o
= 800 mA
1
1.05
1.1
1.1
1.15
1.2
V
V
V
Thermal Regulation
T
a
=25
o
C 30ms Pulse
0.01
0.1
%/W
5/17
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