LD1084XX Datasheet, PDF (1/19 Pages) STMicroelectronics – 5 A low drop positive voltage regulator adjustable and fixed

LD1084xx
5 A low drop positive voltage regulator adjustable and fixed
Features
■ Typical dropout 1.3 V (at 5 A)
■ Three terminal adjustable or fixed output
voltage 2.5 V, 5 V, 12 V.
■ 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 LD1084xx is a low drop voltage regulator
able to provide 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 LD1084xx is pin to pin compatible with
the older 3-terminal adjustable regulators, but has
better performances in term of drop and output
tolerance.
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 LD1084xx 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 numbers
LD1084XX12
LD1084XX25
LD1084XX50
LD1084XX
April 2008
Order codes
LD1084V12
LD1084V25
LD1084V50
LD1084V
Rev 8
Output voltage
12 V
2.5 V
5.0 V
Adjustable
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