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PDF LD1580 Data sheet ( Hoja de datos )
| Número de pieza | LD1580 | |
| Descripción | 7 A VERY LOW DROP POSITIVE VOLTAGE REGULATOR ADJUSTABLE AND FIXED | |
| Fabricantes | ST Microelectronics | |
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LD1580
7 A VERY LOW DROP POSITIVE VOLTAGE REGULATOR
ADJUSTABLE AND FIXED
s OUTPUT CURRENT LIMIT
s LOW DROPOUT VOLTAGE: TYPICALLY
400mV AT 7A OUTPUT CURRENT
s OUTPUT VOLTAGE REMOTE SENSE PIN
s FAST TRANSIENT RESPONSE
s THERMAL SHUTDOWN PROTECTION
WITH HYSTERESIS
s WIDE OPERATING TEMPERATURE RANGE
-40°C TO 125°C
s NO SUPPLY SEQUENCING PROBLEMS IN
DUAL SUPPLY MODE
s OUTPUT VOLTAGES AVAILABLE 1.5 V, 1.8V,
2.5 V, 3.0 V, 3.3 V ADJUSTABLE.
DESCRIPTION
The LD1580 is a very low dropout positive linear
voltage regulator particularly suitable in
applications requiring output currents up to 7 A.
The LD1580 typical dropout voltage is 400mV at
7A while it decreases at
lighter loads.
This very low dropout is achieved thanks to a
second input voltage pin, named VCONTROL,
which is also responsable of the output power
stage driving.
The LD1580 is provided with an output voltage
remote sense pin which reduces dramatically any
PRELIMINARY DATA
HEPTAWATTTM
PENTAWATTTM
1
P2PAK
5
SPAK-5L
SPAK-7L
output voltage variations that could occur due to
load changes.
On fixed voltage devices, the ADJ pin is still
available. A small capacitor on this pin helps to
improve transient response.
SCHEMATIC DIAGRAM
November 2002
1/18
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
1 page  
LD1580
ELECTRICAL CHARACTERISTICS FOR LD1580xx18 ( Tj = -40 °C to 125 °C, CP=330 µF, CC=10 µF,
COUT=100 µF, unless otherwise specified)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
VO
∆VO
∆VO
IC
IQ
IOUT
SVR
VDC
VDP
TSHDN
THYST
Output Voltage
VCONTROL=4 V, VPOWER=2.6 V
Tj=25 °C, IOUT=0 mA
VCONTROL=3.3 V to 12 V
VPOWER=2.4 V to 5.5 V
IOUT=0 to 7 A
Line Regulation
VCONTROL=2.95 V to 12 V
VPOWER=2.3 V to 5.5 V
IOUT=10 mA
Load Regulation
VCONTROL=4.3 V, VPOWER=2.6 V
IOUT=0 to 7 A
VCONTROL Pin Current
VCONTROL=4.3 V, VPOWER=2.6 V
IOUT=100 mA
VCONTROL=4.3 V, VPOWER=2.6 V
IOUT=4 A
VCONTROL=4.3 V, VPOWER=2.3 V
IOUT=4 A
VCONTROL=4.3 V, VPOWER=2.6 V
IOUT=7 A
Quiescent Current
VCONTROL=4.3 V, VPOWER=2.6 V
IOUT=0 A
Output Current Limit
VCONTROL=4.3 V, VPOWER=2.6 V (Note
1)
Supply Voltage Rejection
VCONTROL=VPOWER=4.3 V Avg,
VRIPPLE=1 VP-P
IOUT=4 A, Tj=25 °C
Minimun VCONTROL Voltage VPOWER=2.6 V, IOUT=100 mA
(VCONTROL-VO)
VPOWER=2.6 V, IOUT=1 A
(Note 2)
VPOWER=2.6 V, IOUT=4 A
VPOWER=2.6 V, IOUT=7 A
Minimun VPOWER Voltage
(VPOWER-VO)
VCONTROL=4.3 V, IOUT=1 A
VCONTROL=4.3 V, IOUT=4 A
(Note 2)
VCONTROL=4.3 V, IOUT=7 A
Shutdown Temperature
Threshold
Thermal Shutdown
Hysteresis
1.782
1.764
8
58.4
1.8
1.8
0.08
0.08
6
30
33
60
5
9
78.4
0.95
0.95
1
1.05
0.05
0.2
0.4
170
5
1.818
1.836
0.24
0.4
10
60
70
120
10
1.15
1.15
1.2
1.3
0.15
0.4
0.6
V
%
%
mA
mA
A
dB
V
V
°C
°C
5/18
5 Page 
Figure 7 : VCONTROL Pin Current vs Output
Current
LD1580
Figure 10 : Supply Voltage Rejection vs Output
Current
Figure 8 : Output Current Limit vs Temperature
Figure 11 : Line Transient Response
Figure 9 : Quiescent Current vs Temperature
VPOWER=3.3V, VCONTROL=5 to 7V, IOUT=1A
Figure 12 : Line Transient Response
VPOWER=VCONTROL=5 to 7V, IOUT=1A
11/18
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet LD1580.PDF ] | |
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