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PDF LD1084 Data sheet ( Hoja de datos )
| Número de pieza | LD1084 | |
| Descripción | 5A low-drop positive voltage regulator adjustable | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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LD1084
5 A low-drop positive voltage regulator adjustable
TO-220
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
Output voltage
LD1084V
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.
DocID9035 Rev 10
1/16
www.st.com
16
1 page  
LD1084
3 Maximum ratings
Maximum ratings
Symbol
VI
IO
PD
TSTG
TOP
Table 2. Absolute maximum ratings
Parameter
DC input voltage
Output current
Power dissipation
Storage temperature range
Operating junction temperature range
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.
Symbol
RthJC
RthJA
Table 3. Thermal data
Parameter
Thermal resistance junction-case
Thermal resistance junction-ambient
TO-220
3
50
Unit
°C/W
°C/W
DocID9035 Rev 10
5/16
5 Page 
LD1084
Figure 22. Supply voltage rejection vs.
temperature
Typical performance characteristics
Figure 23. Supply voltage rejection vs.
frequency
Figure 24. Stability
Figure 25. Supply voltage rejection vs. output
current
Figure 26. Stability
Figure 27. Line transient
VI=14 to 15 V, IO=200 mA, CI = 1 µF (tant), CO= 10 µF (tant),
ts= tf = 5 µs
DocID9035 Rev 10
11/16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet LD1084.PDF ] | |
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