LD29300
SERIES
3A, VERY LOW DROP VOLTAGE REGULATORS
I
I
I
I
I
VERY LOW DROPOUT VOLTAGE (TYP. 0.4
AT 3A)
GUARANTEED OUTPUT CURRENT UP TO
3A
FIXED VOLTAGE WITH
±1%
TOLERANCE
AT 25°C
INTERNAL CURRENT AND THERMAL LIMIT
LOGIC CONTROLLED ELECTRONIC
SHUTDOWN AVAILABLE IN PPAK
D
2
PAK
TO-220
DESCRIPTION
The LD29300 is a high current, high accuracy,
low-dropout voltage regulator series. These
regulators feature 400mV dropout voltage and
very low ground current. Designed for high current
loads, these devices are also used in lower
current, extremely low dropout-critical systems,
where their tiny dropout voltage and ground
current values are important attributes. Typical
applications are in Power supply switching post
regulation, Series power supply for monitors,
Series power supply for VCRs and TVs, Computer
Systems and Battery powered systems.
SCHEMATIC DIAGRAM FOR ADJUSTABLE VERSION
D
2
PAK/A
P
2
PAK/A
P
2
PAK
October 2005
1/17
LD29300 SERIES
SCHEMATIC DIAGRAM FOR FIXED VERSION
* Only for version with inhibit function.
ORDER CODES
TO-220
D
2
PAK (*)
D
2
PAK/A (*)
P
2
PAK (*)(#)
LD29300P2T15
LD29300P2T18
LD29300P2T25
LD29300P2T33
LD29300P2T50
LD29300P2T80
LD29300P2T90
LD29300P2T
P
2
PAK/A (*)
LD29300P2M15
LD29300P2M18
LD29300P2M25
LD29300P2M33
LD29300P2M50
LD29300P2M80
LD29300P2M90
(#)
LD29300P2M
(#)
OUTPUT
VOLTAGE
1.5 V
1.8 V
2.5 V
3.3 V
5.0 V
8.0 V
9.0 V
ADJ
LD29300V15
LD29300D2T15
LD29300D2M15
LD29300V18
LD29300D2T18
LD29300D2M18
LD29300V25
LD29300D2T25
LD29300D2M25
LD29300V33
LD29300D2T33
LD29300D2M33
LD29300V50
LD29300D2T50
(#)
LD29300D2M50
LD29300V80
LD29300D2T80
LD29300D2M80
LD29300V90
(#)
LD29300D2T90
(#)
LD29300D2M90
(#)
(*) Available in Tape & Reel with the suffix "R".
(#) Available on request.
ABSOLUTE MAXIMUM RATINGS
Symbol
V
I
I
O
P
D
T
stg
T
op
DC Input Voltage
Output Current
Power Dissipation
Storage Temperature Range
Operating Junction Temperature Range
Parameter
Value
30 (*)
Internally Limited
Internally Limited
-55 to 150
-40 to 125
Unit
V
mA
mW
°C
°C
(*) Above 14V the device is automatically in shut-down.
Absolute Maximum Ratings are those beyond which damage to the device may occur. Functional operation under these condition is not im-
plied.
2/17
LD29300 SERIES
THERMAL DATA
Symbol
R
thj-case
R
thj-amb
Parameter
Thermal Resistance Junction-case
Thermal Resistance Junction-ambient
TO-220
3
50
D
2
PAK-P
2
PAK
D
2
PAK/A-P
2
PAK/A
3
60
Unit
°C/W
°C/W
CONNECTION DIAGRAM
(top view)
TO-220
D
2
PAK
P
2
PAK
D
2
PAK/A
P
2
PAK/A
* Not connected for fixed version.
APPLICATION CIRCUIT
R
1
V
O
= V
REF
(1 +
)
R
2
* Only for version with inhibit function.
3/17
LD29300 SERIES
ELECTRICAL CHARACTERISTICS OF LD29300#15
(I
O
= 10mA, T
J
= 25°C, V
I
= 3.5V, V
INH
= 2V (Note 2), C
I
= 330nF, C
O
= 10µF, unless otherwise specified)
Symbol
V
I
V
O
∆V
O
∆V
O
SVR
I
q
Parameter
Minimum Operating Input
Voltage
Output Voltage
Load Regulation
Line Regulation
Supply Voltage Rejection
Quiescent Current
Test Conditions
I
O
= 10mA to 3A
T
J
= -40 to 125°C
I
O
= 10mA to 3A, V
I
= 3 to 7V
T
J
= -40 to 125°C
I
O
= 10mA to 3A
V
I
= 3 to 13V
f = 120 Hz, V
I
= 3.5
±
1V, I
O
= 1.5A
(Note 1)
I
O
= 1.5A,
T
J
= -40 to 125°C
T
J
= -40 to 125°C
I
O
= 3A,
V
I
= 13V, V
INH
= GND
I
sc
V
IL
V
IH
I
INH
eN
Short Circuit Current
Control Input Logic Low
Control Input Logic High
Control Input Current
Output Noise Voltage
V
I
- V
O
= 5.5V
OFF MODE, (NOTE 2)
ON MODE, (NOTE 2)
T
J
= -40 to 125°C
B
P
= 10Hz to 100KHz
T
J
= -40 to 125°C
T
J
= -40 to 125°C
I
O
= 100mA
2
5
60
10
T
J
= -40 to 125°C
65
Min.
2.5
1.485
1.47
1.5
0.2
0.06
75
20
45
130
4.5
0.8
50
100
180
µA
A
V
V
µA
µV
RMS
1.515
1.53
1.0
0.5
Typ.
Max.
Unit
V
V
%
%
dB
mA
V
INH
= 13V
NOTE 1: Guaranteed by design.
NOTE 2: Only for version with Inhibit function.
ELECTRICAL CHARACTERISTICS OF LD29300#18
(I
O
= 10mA, T
J
= 25°C, V
I
= 3.8V, V
INH
= 2V (Note 3), C
I
= 330nF, C
O
= 10µF, unless otherwise specified)
Symbol
V
O
∆V
O
∆V
O
SVR
V
DROP
Parameter
Output Voltage
Load Regulation
Line Regulation
Supply Voltage Rejection
Dropout Voltage
Test Conditions
I
O
= 10mA to 3A, V
I
= 3 to 7.3V
T
J
= -40 to 125°C
I
O
= 10mA to 3A
V
I
= 3 to 13V
f = 120 Hz, V
I
= 3.8
±
1V, I
O
= 1.5A
(Note 1)
I
O
= 500mA, T
J
= -40 to 125°C (Note 2)
I
O
= 1.5A,
I
O
= 3A,
I
q
Quiescent Current
I
O
= 1.5A,
I
O
= 3A,
I
sc
V
IL
V
IH
I
INH
eN
Short Circuit Current
Control Input Logic Low
Control Input Logic High
Control Input Current
Output Noise Voltage
T
J
= -40 to 125°C (Note 2)
T
J
= -40 to 125°C (Note 2)
T
J
= -40 to 125°C
T
J
= -40 to 125°C
T
J
= -40 to 125°C
T
J
= -40 to 125°C
T
J
= -40 to 125°C
I
O
= 100mA
2
5
60
10
62
Min.
1.782
1.764
Typ.
1.8
0.2
0.06
72
0.1
0.2
0.4
20
45
130
4.5
0.8
0.7
50
100
180
µA
A
V
V
µA
µV
RMS
mA
Max.
1.818
1.836
1.0
0.5
Unit
V
%
%
dB
V
V
I
= 13V, V
INH
= GND
V
I
- V
O
= 5.5V
OFF MODE, (NOTE 3)
ON MODE, (NOTE 3)
T
J
= -40 to 125°C
B
P
= 10Hz to 100KHz
V
INH
= 13V
NOTE 1: Guaranteed by design.
NOTE 2: Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value with V
O
+1V
applied to V
I
.
NOTE 3: Only for version with Inhibit function.
4/17
LD29300 SERIES
ELECTRICAL CHARACTERISTICS OF LD29300#25
(I
O
= 10mA, T
J
= 25°C, V
I
= 4.5V, V
INH
= 2V (Note 3), C
I
= 330nF, C
O
= 10µF, unless otherwise specified)
Symbol
V
O
∆V
O
∆V
O
SVR
V
DROP
Parameter
Output Voltage
Load Regulation
Line Regulation
Supply Voltage Rejection
Dropout Voltage
Test Conditions
I
O
= 10mA to 3A, V
I
= 3.5 to 8V
T
J
= -40 to 125°C
I
O
= 10mA to 3A
V
I
= 3.5 to 13V
f = 120 Hz, V
I
= 4.5
±
1V, I
O
= 1.5A
(Note 1)
I
O
= 500mA, T
J
= -40 to 125°C (Note 2)
I
O
= 1.5A,
I
O
= 3A,
I
q
Quiescent Current
I
O
= 1.5A,
I
O
= 3A,
I
sc
V
IL
V
IH
I
INH
eN
Short Circuit Current
Control Input Logic Low
Control Input Logic High
Control Input Current
Output Noise Voltage
T
J
= -40 to 125°C (Note 2)
T
J
= -40 to 125°C (Note 2)
T
J
= -40 to 125°C
T
J
= -40 to 125°C
T
J
= -40 to 125°C
T
J
= -40 to 125°C
T
J
= -40 to 125°C
I
O
= 100mA
2
5
100
10
55
Min.
2.475
2.45
Typ.
2.5
0.2
0.06
70
0.1
0.2
0.4
20
45
130
4.5
0.8
0.7
50
100
180
µA
A
V
V
µA
µV
RMS
mA
Max.
2.525
2.55
1.0
0.5
Unit
V
%
%
dB
V
V
I
= 13V, V
INH
= GND
V
I
- V
O
= 5.5V
OFF MODE, (NOTE 3)
ON MODE, (NOTE 3)
T
J
= -40 to 125°C
B
P
= 10Hz to 100KHz
V
INH
= 13V
NOTE 1: Guaranteed by design.
NOTE 2: Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value with V
O
+1V
applied to V
I
.
NOTE 3: Only for version with Inhibit function.
ELECTRICAL CHARACTERISTICS OF LD29300#33
(I
O
= 10mA, T
J
= 25°C, V
I
= 5.3V, V
INH
= 2V (Note 3), C
I
= 330nF, C
O
= 10µF, unless otherwise specified)
Symbol
V
O
∆V
O
∆V
O
SVR
V
DROP
Parameter
Output Voltage
Load Regulation
Line Regulation
Supply Voltage Rejection
Dropout Voltage
Test Conditions
I
O
= 10mA to 3A, V
I
= 4.3 to 8.8V
T
J
= -40 to 125°C
I
O
= 10mA to 3A
V
I
= 4.3 to 13V
f = 120 Hz, V
I
= 5.3
±
1V, I
O
= 1.5A
(Note 1)
I
O
= 500mA, T
J
= -40 to 125°C (Note 2)
I
O
= 1.5A,
I
O
= 3A,
I
q
Quiescent Current
I
O
= 1.5A,
I
O
= 3A,
I
sc
V
IL
V
IH
I
INH
eN
Short Circuit Current
Control Input Logic Low
Control Input Logic High
Control Input Current
Output Noise Voltage
T
J
= -40 to 125°C (Note 2)
T
J
= -40 to 125°C (Note 2)
T
J
= -40 to 125°C
T
J
= -40 to 125°C
T
J
= -40 to 125°C
T
J
= -40 to 125°C
T
J
= -40 to 125°C
I
O
= 100mA
2
5
132
10
52
Min.
3.267
3.234
Typ.
3.3
0.2
0.06
67
0.1
0.2
0.4
20
45
130
4.5
0.8
0.7
50
100
180
µA
A
V
V
µA
µV
RMS
mA
Max.
3.333
3.366
1.0
0.5
Unit
V
%
%
dB
V
V
I
= 13V, V
INH
= GND
V
I
- V
O
= 5.5V
OFF MODE, (NOTE 3)
ON MODE, (NOTE 3)
T
J
= -40 to 125°C
B
P
= 10Hz to 100KHz
V
INH
= 13V
NOTE 1: Guaranteed by design.
NOTE 2: Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value with V
O
+1V
applied to V
I
.
NOTE 3: Only for version with Inhibit function.
5/17
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