|
|
PDF GS1117 Data sheet ( Hoja de datos )
| Número de pieza | GS1117 | |
| Descripción | 800mA Low Dropout Voltage Regulator | |
| Fabricantes | Globaltech | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de GS1117 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
|
No Preview Available !
800mA Low Dropout Voltage Regulator
Product Description
The GS1117/R series of adjustable and fixed
voltage regulators are designed to provide 800mA
output current and to operate down to 1V
input-to-output differential.
The dropout voltage of the device is guaranteed
maximum 1.3V at maximum output current,
decreasing at lower load currents.
On-chip trimming adjusts the reference voltage to
1%. Current limit is also trimmed, minimizing the
stress under overload conditions on both the
regulator and power source circuitry.
The GS1117/R devices are pin compatible with
other three-terminal SCSI regulators and are
offered in the low profile surface mount SOT-223
and SOT-89 packages.
Features
Three Terminal Adjustable or Fixed Voltages
* 1.5V, 1.8V, 2.5V, 2.85V, 3.3V and 5.0V.
Output Current of 800mA
Operates Down to 1V Dropout
Line Regulation: 0.2% Max.
Load Regulation: 0.4% Max.
RoHS Compliant, 100%Pb & Halogen Free
Applications
High Efficiency Linear Regulators
Post Regulators for Switching Supplies.
Battery Chargers
Active SCSI Terminators (Sound Cards)
Power Management for Notebook
Battery Powered Instrumentation
Block Diagram
IN
+
-
GND
THERMAL
LIMIT
ADJ
OUT
For Fixed Voltage Device
www.gs-power.com 1
1 page  
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. For
guaranteed specifications and test conditions, see the Electrical Characteristics. The
guaranteed specifications apply only for the test conditions listed.
Note 2: Line and load regulation are guaranteed up to the maximum power dissipation of 1.2W for
SOT-223 package and 0.9W for SOT-89 package. Power dissipation is determined by the
input/ output differential and the output current. Guaranteed maximum power dissipation will
not be available over the full input/output range.
Note 3: See thermal regulation specifications for changes in output voltage due to heating effects. Line
and load regulation are measured at a constant junction temperature by low duty cycle pulse
testing. Load regulation is measured at the output lead~1/8’’ from the package.
Note 4: Dropout voltage is specified over the full output current range of the device.
Note 5: Minimum lode current is defined as the minimum output current required maintaining regulation.
When 1.5V ≤ (VIN-VOUT) ≤12V the device is guaranteed to regulate if the output current is greater
than 10mA.
Application Hints
The GS1117/R series of adjustable and fixed regulators are easy to use and are protected against short circuit and
thermal overloads. Thermal protection circuitry will shut-down the regulator should the junction temperature
exceed 165℃ at the sense point.
Pin compatible with older terminal adjustable regulators, these devices offer the advantage of a lower dropout
voltage, more precise reference tolerance and improved reference stability with temperature.
Stability
The circuit design used in the GS1117/R series requires the use of an output capacitor as part of the device
frequency compensation. The addition of 150µF aluminum electrolytic or a 22µF solid tantalum on the output will
ensure stability for all operating conditions.
When the adjustment terminal is bypassed with a capacitor to improve the ripple rejection, the requirement for an
output capacitor increases. The value of 22µF tantalum or 150µF aluminum covers all cases of bypassing the
adjustment terminal. Without bypassing the adjustment terminal smaller capacitors can be uses with equally good
results.
To further improve stability and transient response of these devices larger of output capacitor can be used.
Protection Diodes
Unlike older regulators, the GS1117/R family does not need any protection diodes between the adjustment pin and
the output and from the output to the input to prevent over-stressing the die. Internal resistors are limiting the
internal current paths on the adjustment pin no protection diode is needed to ensure device safety under
short-circuit conditions.
Diodes between the input and output are not usually needed. Microsecond surge currents of 50A to 100A can be
handled by the internal diode between the input and output pins of the devices. In normal diode between the input
and output pins of the device. In normal operations it is difficult to get those values of surge currents even with the
use of large output capacitances. If high value output capacitors are used, such as 1000µF to 5000µF and the
input pin is instantaneously shorted to ground, damage can occur. A diode from output to input is recommended,
when a crowbar circuit at the input of the GS1117/R is used (Figure 1).
Vin IN OUT
Vout
GS1117/R
ADJ
R1
Cout
22uF
CADJ
1E0NuF
R2
Figure 1.
www.gs-power.com 5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet GS1117.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| GS1117 | 800mA Low Dropout Positive Adjustable Regulator |  Vishay Siliconix |
| GS1117 | 800mA Low Dropout Voltage Regulator | Globaltech |
| GS1117A | 1A Low Dropout Voltage Regulator | Globaltech |
| GS1117CE | 800mA Low Dropout Positive Adjustable Regulator | Vishay Siliconix |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |