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LD1084V Schematic ( PDF Datasheet ) - ST Microelectronics

Teilenummer LD1084V
Beschreibung 5A LOW DROP POSITIVE VOLTAGE REGULATOR ADJUSTABLE
Hersteller ST Microelectronics
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Gesamt 16 Seiten
LD1084V Datasheet, Funktion
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
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LD1084V Datasheet, Funktion
Schematic application
4 Schematic application
Figure 3. Application circuit
LD1084
VO = VREF 1 + RR-----21-
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LD1084V pdf, datenblatt
Typical performance characteristics
Figure 28. Line transient
LD1084
Figure 29. Load transient
VI=12 to 13 V, IO = 200 mA, CI = 1 µF (tant), CO= 10 µF
(tant), No CADJ ts = tf = 5 µs
Figure 30. Load transient
VI =15 V, IO = 0.1 to 5 A, CI = 1 µF (tant), CO= 10 µF (tant)
Figure 31. Line transient
VI = 15 V, IO= 0.1 to 5 A, CI = 1 µF (tant), CO= 10 µF (tant),
No CADJ
Figure 32. Load transient
VI=12 to 13 V, IO= 200 mA, CI = 1 µF (tant), CO= 10 µF(tant),
CADJ = 1µF, ts = tf = 5 µs
VI=13 V, IO= 0.1 to 5 A, CI = 1 µF(tant), CO=10 µF (tant)
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