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PDF LD1585CXX Data sheet ( Hoja de datos )
| Número de pieza | LD1585CXX | |
| Descripción | 5A low dropout fast response positive voltage regulator adjustable | |
| Fabricantes | STMicroelectronics | |
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LD1585CXX
5 A low dropout fast response positive
voltage regulator adjustable
Features
■ Typical dropout 1.2 V
■ Fast transient response
www.DataSheet4U■.comThree terminal adjustable
■ 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
0 °C to 125 °C
■ Package available: TO-220
■ Pinout compatibility with standard adjustable
VREG
Description
The LD1585C is a low drop voltage regulator able
to provide up to 5 A of output current. Dropout is
guaranteed at a maximum of 1.4 V at the
maximum output current, decreasing at lower
loads. The device has been improved to be
utilized in low voltage applications where transient
response and minimum input voltage are critical.
The most important feature of the device consist
in lower dropout voltage and very fast transient
response. A 2.85 V output version is suitable for
SCSI-2 active termination. Unlike PNP regulators,
where a part of the output current is wasted as
quiescent current, the LD1585C quiescent current
flows into the load, so increase efficiency. Only a
10 µF minimum capacitor is need for stability.
TO-220
The device is supplied in TO-220. On chip
trimming allows the regulator to reach a very tight
output voltage tolerance, within ± 1 % at 25 °C.
Table 1.
Device summary
Part number
LD1585CXX
July 2008
Order code
LD1585CV
Rev 8
Output voltage
ADJ
1/15
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15
1 page  
LD1585CXX
3 Maximum ratings
Maximum ratings
Table 2. Absolute maximum ratings
Symbol
Parameter
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VI
IO
PD
TSTG
TOP
DC input voltage
Output current
Power dissipation
Storage temperature range
Operating junction temperature range
Value
30
Internally limited
Internally limited
-55 to +150
0 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 condition is not implied.
Table 3. Thermal data
Symbol
Parameter
RthJC
RthJA
Thermal resistance junction-case
Thermal resistance junction-ambient
Value
3
50
Unit
°C/W
°C/W
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5 Page 
LD1585CXX
Figure 22. Supply voltage rejection vs
temperature
Typical characteristics
Figure 23. Supply voltage rejection vs
temperature
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Figure 24. Line transient
Figure 25. Load transient
VI=15 to 16V, IO=200mA, CI = 1µF(tant), CO=10µF(tant)
Figure 26. Load transient
VI=15 V, IO=0.1 to 5 A, CI = 10µF(tant), CO=10µF(tant)
VI=7 V, IO=0.1 to 5 A, CI = 10µF(tant), CO=10µF(tant)
11/15
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