LD1084
5 A low-drop positive voltage regulator adjustable
Datasheet
-
production data
LD1084 quiescent current flows into the load, so
to increase the efficiency. A minimum capacitor of
10 µF is needed for stability.
The device is supplied in TO-220. The on-chip
trimming allows the regulator to reach a very tight
output voltage tolerance, within ± 1% at 25 °C.
Table 1. Device summary
Order code
TO-220
LD1084V
Output voltage
adjustable
Features
•
Typical dropout 1.3 V (at 5 A)
•
Three-terminal adjustable output voltage
•
Guaranteed output current up to 5 A
•
Output tolerance ± 1% at 25 °C and ± 2% in full
temperature range
•
Internal power and thermal limit
•
Wide operating temperature range -40 °C to
125 °C
•
Package available: TO-220
•
Pinout compatibility with standard adjustable
VREG
Description
The LD1084 is a low-drop voltage regulator
providing up to 5 A of output current. Dropout is
guaranteed at a maximum of 1.5 V at the
maximum output current, decreasing at lower
loads. The LD1084 is pin-to-pin compatible with
the older 3-terminal adjustable regulators, but it
has better performances in terms of drop and
output tolerance.
Unlike PNP regulators, where a part of the output
current is wasted as quiescent current, the
September 2013
This is information on a product in full production.
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Contents
LD1084
Contents
1
2
3
4
5
6
7
8
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
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LD1084
Maximum ratings
3
Maximum ratings
Table 2. 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
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied.
Table 3. Thermal data
Symbol
R
thJC
R
thJA
Parameter
Thermal resistance junction-case
Thermal resistance junction-ambient
TO-220
3
50
Unit
°C/W
°C/W
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Embedded System
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