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PDF LD39100PUR Data sheet ( Hoja de datos )
| Número de pieza | LD39100PUR | |
| Descripción | Low Noise Voltage Regulator | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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LD39100XX
LD39100XX12, LD39100XX25
1 A, low quiescent current, low noise voltage regulator
Preliminary data
Features
■ Input voltage from 1.5 to 5.5 V
■ Ultra low dropout voltage (200 mV typ. at 1 A
load)
■ Very low quiescent current (20 µA typ. at no
load, 200 µA typ. at 1 A load, 1 µA max in off
mode)
■ Very low noise with no bypass capacitor
(30 µVRMS at VOUT = 0.8 V)
■ Output voltage tolerance: ± 2.0 % @ 25 °C
■ 1 A guaranteed output current
■ Wide range of output voltages available on
request: 0.8 V to 4.5 V with 100 mV step and
adjustable from 0.8 V
■ Logic-controlled electronic shutdown
■ Stabilized with ceramic capacitors COUT = 1 µF
■ Internal current and thermal limit
■ DFN6 (3 x 3 mm) package
■ Temperature range: -40 °C to 125 °C
DFN6 (3 x 3 mm)
An enable logic control function puts the
LD39100xx in shutdown 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
printers, personal digital assistants (PDAs),
cordless phones and consumer applications.
Description
The LD39100xx provides 1 A maximum current
from an input voltage ranging from 1.5 V to 5.5 V
with a typical dropout voltage of 200 mV. The
deveice is stable due to the use of ceramic
capacitors on the input and output. 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 roll off at 10
kHz.
Table 1. Device summary
Part numbers
Order codes
LD39100XX
LD39100XX12
LD39100XX25
LD39100PUR
LD39100PU12R
LD39100PU25R
Output voltages
Adj. from 0.8 V
1.2 V
2.5 V
July 2009
Doc ID 15676 Rev 1
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
1/24
www.st.com
24
1 page  
LD39100XX, LD39100XX12, LD39100XX25
www.DataSheet4U.com
3 Maximum ratings
Maximum ratings
Table 3. Absolute maximum ratings
Symbol
Parameter
VIN
VOUT
EN
PG
ADJ
DC input voltage
DC output voltage
Enable pin
Power Good pin
Adjust pin
IOUT
PD
TSTG
TOP
Output current
Power dissipation
Storage temperature range
Operating junction temperature range
Value
Unit
-0.3 to 7
-0.3 to VIN + 0.3 (7 V max)
-0.3 to VIN + 0.3 (7 V max)
-0.3 to 7
4
Internally limited
Internally limited
- 65 to 150
- 40 to 125
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
4
0.4
Unit
kV
kV
Doc ID 15676 Rev 1
5/24
5 Page 
LD39100XX, LD39100XX12, LD39100XX25
www.DataSheet4U.com
Figure 10. Output voltage vs. input voltage
Typical performance characteristics
Figure 11. Output voltage vs. input voltage
1.2
1
VIN from 0 to 5.5 V, VEN to VIN, VOUT = 0.8 V, IOUT = 1 A
0.8
125°C
0.6 85°C
55°C
0.4 25°C
0°C
0.2 -25°C
-40°C
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
VIN [V]
3
VIN from 0 to 5 V, VEN to VIN, VOUT = 2.5 V, IOUT = 1A
2.5
2 125°C
85°C
1.5 55°C
25°C
1 0°C
0.5 -25°C
-40°C
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
VIN [V]
Figure 12. Quiescent current vs. temperature Figure 13. VIN input current in off mode vs.
temperature
140
120
100
80
60
VIN = 1.8 V, VEN to VIN, VOUT = 2.5 V
40
20
0
-50 -25 0 25 50
T [°C]
75
No Load
IOUT = 1 A
100 125 150
0.6
VIN = 3.5 V, VEN to GND, VOUT = 2.5 V
0.5
0.4
0.3
0.2
0.1
0
-50 -25 0
25 50 75 100 125 150
T [°C]
Figure 14. Load regulation
Figure 15. Line regulation
0.015
0.01
0.005
0
-0.005
-0.01
-0.015
-50
VIN = 3.5 V, IOUT = from 10 mA to 1 A, VEN=VIN, VOUT = 2.5 V
-25 0 25 50 75 100 125 150
T [°C]
0.04
0.03
VIN = from 1.8 V to 5.5 V, IOUT = 100 mA, VEN = VIN, VOUT = 0.8 V
0.02
0.01
0
-0.01
-0.02
-0.03
-0.04
-50 -25 0
25 50 75 100 125
T [°C]
150
Doc ID 15676 Rev 1
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| PDF Descargar | [ Datasheet LD39100PUR.PDF ] | |
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