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PDF AMS1117 Data sheet ( Hoja de datos )
| Número de pieza | AMS1117 | |
| Descripción | 1A Adjustable/Fixed Low Dropout Linear Regulator | |
| Fabricantes | Advanced Monolithic Systems | |
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AMS1117
1A Adjustable/Fixed Low Dropout Linear Regulator
General Description
The AMS1117-ADJ and AMS1117-1.2,-1.5,-1.8,-2.5,-2.85,
-3.3 and-5 are low dropout three-terminal regulators with
1A output current capability. These devices have been
optimized for low voltage where transient response and
minimum input voltage are critical. The 2.85V version is
designed specifically to be used in Active Terminators for
SCSI bus.
On-chip thermal limiting provides protection against any
combination of overload and ambient temperatures that
would create excessive junction temperatures.
Unlike PNP type regulators where up to 10% of the output
current is wasted as quiescent current, the quiescent cur-
rent of the AMS1117 flows into the load, increasing effi-
ciency.
The AMS1117 series regulators are available in the indus-
try-standard SOT-223 and TO-252 power packages.
Key Features
- Low dropout voltage
- Load regulation: 0.2% typical
- Optimized for Low Voltage
- On-chip thermal limiting
- Standard SOT-223 and TO-252 packages
- Three-terminal adjustable or fixed low dropout
1.2V,1.5V,1.8V, 2.5V, 2.85V, 3.3V, 5V. Regulators
Applications
- Active SCSI terminators
- High efficiency linear regulators
- Post regulators for switching supplies
- Battery chargers
- 12V to 5V linear regulators
-Motherboard clock supplies
Typical Application
Figure 1. Typical Applications of AMS1117
Notice: The distance between Vout pin and Capacitor should not exceed 4cm for excellent performance
1
Advanced Monolithic Systems http://www.ams-semitech.com
1 page  
AMS1117
1A Adjustable/Fixed Low Dropout Linear Regulator
Electrical Characteristic (Continued)
Typicals and limits appearing in normal type apply for TJ=2 .Limits appearing in Boldface type apply over the entire junction temperature for
operation, -20 to 125
Symbol
Parameter
Conditions
Min
Note 2)
RMS Output Noise(% of
VOUT)
TA = 25°C, 10Hz<= f <=10kHz
Thermal Resistance, Junction
ILimit
to Case
SOT-223
TO-252
Thermal Shutdown
Junction Temperature
Thermal Shutdown Hysteresis
Note 1: Typical Values represent the most likely parametric norm.
Note 2: All limits are guaranteed by testing or statistical analysis.
Note 3: Load and line regulation are measured at constant junction room temperature.
Note 4: The minimum output current required to maintain regulation.
Typ
Note 1)
0.003
15
3
155
25
Max
Note 2)
Units
/W
W
Typical Performance Characteristics
1.5
1.4
1.3
1.2
1.0
0.9
0.8
0.7
0.6
0.5
0
0 0.2 0.4 0.6 0.8 1.0
Output Current ( A )
Figure 4. Dropout Voltage VS. Output Current
5
Advanced Monolithic Systems http://www.ams-semitech.com
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet AMS1117.PDF ] | |
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