KD1084XX_08 Datasheet, PDF (1/20 Pages) STMicroelectronics – 5 A low drop positive voltage regulator adjustable and fixed

KD1084xx
KD1084Axx
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 1.8 V, 3.3 V.
■ Guaranteed output current up to 5 A
■ Output tolerance ±1 % at 25 °C and ± 2 % in full
temperature range for the "A" version
■ Output tolerance ± 2 % at 25 °C and ± 3 % in
full temperature range internal power and
thermal limit
■ Wide operating temp. range -40 °C to 125 °C
■ Package available: D²PAK and DPAK
■ Pinout compatibility with standard adjustable
VREG
Description
The KD1084xx 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 KD1084xx is pin to pin compatible with
he older 3-terminal adjustable regulators but has
better performances in term of drop and output
tolerance.
D²PAK
DPAK
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 KD1084xx quiescent current flows
into the load, so increase efficiency. Only a 10 µF
minimum capacitor is need for stability.
The devices are supplied in D²PAK and DPAK. On
chip trimming allows the regulator to reach a very
tight output voltage tolerance, within ±1% at 25 °C
for "A" version and ± 2 % at 25 °C for standard
version.
Table 1. Device summary
Part numbers
KD1084AXX18
KD1084XX33
KD1084AXX33
KD1084XX
KD1084AXX
D²PAK
KD1084AD2T18R
Order codes
DPAK
KD1084DT33R
KD1084ADT33R
KD1084DT-R
KD1084ADT-R
Output voltage
1.8 V
3.3 V
3.3 V
ADJ
ADJ
Tolerance
1%
2%
1%
2%
1%
July 2008
Rev 9
1/20
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