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PDF LD39050xx Data sheet ( Hoja de datos )
| Número de pieza | LD39050xx | |
| Descripción | 500 mA low quiescent current low noise voltage regulator | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LD39050xx (archivo pdf) en la parte inferior de esta página. Total 24 Páginas | ||
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LD39050xx
500 mA low quiescent current
low noise voltage regulator
Features
■ Input voltage from 1.5 to 5.5 V
■ Ultra low dropout voltage (200 mV typ. at 500
mA load)
■ Very low quiescent current (20 µA typ. at no
load, 100 µA typ. at 500 mA load, 1 µA max in
off mode)
■ Very low noise without bypass capacitor
■ Output voltage tolerance: ± 2.0 % @ 25 °C
■ 500 mA guaranteed output current
■ Wide range of output voltages available on
request: 0.8 V to 4.5 V with 100 mV step and
ADJ from 0.8 V
■ Logic-controlled electronic shutdown
■ Compatible with ceramic capacitor
COUT = 1 µF
■ Internal current and thermal limit
■ Package DFN6 (3 x 3 mm)
■ Temperature range: -40 °C to 125 °C
DFN6 (3 x 3 mm)
roll off at 10 kHz. An Enable logic control function
puts the LD39050 in shut-down mode allowing a
total current consumption lower than 1 µA. The
device also includes short-circuit constant current
limiting and thermal protection. Typical
applications are mobile phones, personal digital
assistants (PDAs), cordless phones and similar
battery-powered systems.
Description
The LD39050 provides 500 mA maximum current
from an input voltage ranging from 1.5 V to 5.5 V
with a typical dropout voltage of 200 mV. Stability
is provided using ceramic capacitors. The ultra
low drop-voltage, low quiescent current and low
noise features make it suitable for low power
battery-powered applications. Power supply
rejection is 65 dB at low frequencies and starts to
Table 1. Device summary
Part numbers
Order codes
LD39050XX
LD39050XX10
LD39050XX12
LD39050XX25
LD39050XX33
LD39050PUR
LD39050PU10R
LD39050PU12R
LD39050PU25R
LD39050PU33R
Output voltages
ADJ from 0.8 V
1.0 V
1.2 V
2.5 V
3.3 V
March 2009
Rev 1
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24
1 page  
LD39050xx
3 Maximum ratings
Maximum ratings
Table 3. Absolute maximum ratings
Symbol
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VOUT
EN
DC input voltage
DC output voltage
Enable pin
Parameter
PG Power Good pin
ADJ Adjust pin
IOUT
PD
TSTG
TOP
Output current
Power dissipation
Storage temperature range
Operating junction temperature range
Value
-0.3 to 7
-0.3 to VI + 0.3 (7 V max)
-0.3 to VI + 0.3 (7 V max)
-0.3 to 7
4
Internally limited
Internally limited
- 65 to 150
- 40 to 125
Unit
V
V
V
V
V
°C
°C
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied. All values are referred to GND.
Table 4. Thermal data
Symbol
Parameter
RthJA
RthJC
Thermal resistance junction-ambient
Thermal resistance junction-case
Value
55
10
Unit
°C/W
°C/W
Table 5. ESD performance
Symbol
Parameter
ESD ESD protection voltage
Test conditions
HBM
MM
Value
2
0.3
Unit
kV
kV
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5 Page 
LD39050xx
Typical performance characteristics
Figure 10. Output voltage vs. input voltage Figure 11. Quiescent current vs. temperature
0.9
0.8
0.7 125°C
0.6
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0.5
85°C
55°C
0.4 25°C
0.3 0°C
0.2 - 25°C
0.1
VEN = VIN, CIN = COUT = 1 µF; IOUT = 500 mA
- 40°C
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
VIN [V]
100
90
80
70
60
50
40
30
20
10
0
-50
VIN = 1.8 V, VEN to VIN, CIN = 1 µF COUT = 1 µF, VOUT = 0.8 V
-25 0
25 50 75
T [°C]
100
No load
IOUT = 0.5 A
125 150
Figure 12. Quiescent current vs. temperature Figure 13. Quiescent current in off mode vs.
temperature
100
90
80
70
60
50 VIN = 3.5 V, VEN to VIN, CIN = COUT = 1 µF, VOUT = 2.5 V
40
30
20
10
0
-50 -25
0
25 50 75
T [°C]
No load
IOUT = 0.5 A
100 125 150
0.6
0.5
VIN = 3.5 V, VOUT = 2.5 V, VEN = GND, CIN = COUT = 1 µF
0.4
0.3
0.2
0.1
0
-50 -25
0
25 50 75
T [°C]
100 125 150
Figure 14. Load regulation
Figure 15. Line regulation
0.04
0.03
0.02
0.01
0
-0.01
-0.02
-0.03
-0.04
-50
VIN = 1.8 V, IOUT = from 10 mA to 500 mA, VOUT = 0.8 V, VEN = VIN
-25 0
25 50 75 100 125
T [°C]
150
0.04
0.03
0.02
0.01
0
-0.01
-0.02
-0.03
-0.04
-50
-25
IOUT = 1 mA
IOUT = 100 mA
VIN = from 1.8 V to 5.5 V VEN = VIN VOUT = 0.8 V
0 25 50 75 100
T [°C]
125
150
11/24
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| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet LD39050xx.PDF ] | |
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