May 2011 Doc ID 8761 Rev 11 1/17
17
KD1084AXX
KD1084AXX18
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 KD1084 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 KD1084 is pin to pin compatible with
he 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 KD1084 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.
DPAK
D²PAK
Table 1. Device summary
Order codes
D²PAK DPAK Output voltage Tol e r anc e
KD1084AD2T18R 1.8 V 1%
KD1084ADT-R ADJ 1%
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