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PDF LDK120 Data sheet ( Hoja de datos )
| Número de pieza | LDK120 | |
| Descripción | 200 mA low quiescent current very low noise LDO | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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LDK120
200 mA low quiescent current very low noise LDO
627/
')1 [PP
627/
Features
• Input voltage from 1.9 to 5.5 V
• Very low dropout voltage (100 mV typ. at 100
mA load)
• Low quiescent current (max. 100 µA, 1 µA in
OFF mode)
• Very low noise
• Output voltage tolerance: ± 2.0% @ 25 °C
• 200 mA guaranteed output current
• Wide range of fixed output voltages available
on request: from 0.8 V to 3.5 V with 100 mV
step
• Adjustable version: from 0.8 V to VIN-Vdrop
• Logic-controlled electronic shutdown
• Compatible with ceramic capacitor COUT = 1 µF
• Internal current and thermal limit
• Available in SOT23-5L, SOT323-5L and DFN6
(1.2 x 1.3 mm) packages
• Temperature range: -40 °C to 125 °C
Datasheet - production data
Applications
• Mobile phones
• Personal digital assistants (PDAs)
• Cordless phones and similar battery-powered
systems
• Digital still cameras
Description
The LDK120 low drop voltage regulator provides
200 mA of maximum current from an input supply
voltage in the range of 1.9 V to 5.5 V, with a
typical dropout voltage of 100 mV.
It is stabilized with a ceramic capacitor on the
output.
The very low drop voltage, low quiescent current
and low noise features make it suitable for low
power battery-powered applications.
An enable logic control function puts the LDK120
in shutdown mode allowing a total current
consumption lower than 1 µA.
The device also includes a short-circuit constant
current limiting and thermal protection.
March 2014
This is information on a product in full production.
DocID023965 Rev 4
1/24
www.st.com
24
http://www.Datasheet4U.com
1 page  
LDK120
3T
ypical application
Typical application
Figure 3. Typical application circuits for fixed version
Figure 4. Typical application circuits for adjustable version
VO=VADJ (1+R1/R2)
DocID023965 Rev 4
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LDK120
Typical performance characteristics
Figure 17. Quiescent current vs. temp. for fixed Figure 18. Quiescent current vs. temp. for fixed
version (IO = 0 mA)
version (IO = 200 mA)
100
90
80
70
60
50
40
30
20
10
0
-50
-25
VIN = 4 V, IOUT = 0 mA
AM16208v1
0 25 50 75 100 125 150
Temperature [°C]
200
180
160
140
120
100
80
60
40
20
0
-50
-25
VIN = 4 V, IOUT = 200 mA
AM16209v1
0 25 50 75 100 125 150
Temperature [°C]
Figure 19. Shutdown current vs. temperature
Figure 20. SVR vs. frequency (VO = 2.5 V)
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-50
-25
VIN = 4 V , V EN = GND
AM16210v1
0 25 50 75 100 125 150
Temperature [°C]
80 AM16211v1
Cbyp =10 nF
70 No Cbyp
60
50
40
30
20
10
V OUT = 2.5 V, VIN = VOUT + 0.5 V +/ - 100 mV, IOUT = 10 mA
0
100
1000
10000
Frequency [Hz]
100000
Figure 21. SVR vs. frequency (VO = VADJ)
80
70
60
50
40
30
20
10
VOUT = VADJ, VIN = VOUT + 0.5 V +/ - 100 mV, IOUT = 10 mA
0
100
1000
10000
Frequency [Hz]
AM16212v1
100000
Figure 22. Output noise vs. frequency
(VO = 3.3 V)
1.4 VIN = 4.3 V, IOUT = 10 mA
1.2
AM16213v1
Cbyp = 10 nF
No Cbyp
1
0.8
0.6
0.4
0.2
0
1000
10000
Frequency (Hz)
100000
DocID023965 Rev 4
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11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet LDK120.PDF ] | |
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