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PDF TS2950 Data sheet ( Hoja de datos )
| Número de pieza | TS2950 | |
| Descripción | (TS2950 / TS2951) 150mA Ultra Low Dropout Positive Voltage Regulator | |
| Fabricantes | Taiwan Semiconductor Company | |
| Logotipo |  |
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TS2950/TS2951 series
150mA Ultra Low Dropout Positive Voltage Regulator
Pin assignment
TO-92
1. Output
2. Ground
3. Input
Pin assignment
SOP-8
1. Output
2. Sense
3. Shutdown
4. Ground
5. Error
6. Voltage tap
7. Feedback
8. Input
Input Voltage Range up to 30V
Output Current up to 150mA
Low Drop Out Voltage 0.4V
General Description
The TS2950/A & TS951/A are low power voltage regulators. These devices are excellent choice for use in
battery-powered applications such as cordless telephone, radio control systems, and portable computers.
The TS2950/A & TS2951/A is features very low quiescent current (75uA Typ.) and very low drop output voltage (Typ.
40uV at light load and 380 mV at 100 mA). This includes a tight initial tolerance of 0.5% typ.(A version), extremely good
load and line regulation 0.05% typ. and very low output temperature coefficient, making the TS2950/A & TS2951/A useful
as a low-power voltage reference.
TS2951/A have other key additional feature of unregulated input voltage transient of -20V below ground (reverse battery).
The error flag output feature is used as power-on reset for warn of a low output voltage, due to following batteries on
input. The logic-compatible shutdown input which enable the regulator to be switched on/off. The regulator output voltage
may be pin-strapped for a 5.0, 3.3 & 3V of programmed from 1.24V to 29V with external pair of resistors. Using of as
design, processing and testing techniques make TS2950/A & TS951/A superior over similar products.
The TS2950/A is offered in 3-pin TO-92 package, The TS2951/A is available in 8-pin plastic SOP-8 package.
Features
Output voltage available in 5V, 3.3V & 3V
Extremely low quiescent current
Low dropout voltage
Extremely tight load and line regulation
Very low temperature coefficient
Need only 1uF for stability
Unregulated DC input can withstand -20V reverse
battery and +60V positive transients
Use as Regulator or Reference
Stable with low-ESR output capacitors
Current and thermal limiting
Direct replacement for LP2950 & LP2951 sockets
TS2951 VERSIONS ONLY
Error Flag warns of output dropout
Logic-Controlled electronic shutdown
Additional voltage tap
Output voltage sense
Output programmable from 1.24 to 29V
Application
Battery powered systems
Portable instrumentation
Avionics
Automotive Electronics
SMPS Post-Regulator
Voltage Reference
Portable/Palm top / Notebook computers
Portable consumer equipment
Radio control system
Ordering Information
Part No.
Operating Temp. Package
TS2950CT-xx
-40 ~ +85oC
TO-92
TS2951CS-xx
TS2950ACT-xx
-20 ~ +85oC
SOP-8
TO-92
TS2951ACS-xx
SOP-8
Note: Where xx denotes voltage option, available are
5.0V, 3.3V and 3V. Contact factory for additional
voltage options.
TS2950-51 series
1-6
2003/12 rev. B
1 page  
Application Hints (continued)
Programming The output Voltage
The TS2951/A output voltage is programmable for any
value from it reference voltage of 1.235V and it maximum
rating of 30V. For example for 5 volt needs to
pin-strapped and using the internal voltage divider by
tying pin 1 to 2 and pin 7 to pin 6. Refer to Figure 2, there
are two external resistor required for this programming.
Refer to the below equation for the programming the
output voltage:
Volt=Vref x (1+R1\R2)+IFB * R1
The Vref is 1.235V and IFB is the feedback bias current,
nominally -20nA. The minimum recommended load
current of 1uA forces an upper limit of 1.2MΩon value of
R2, If no load presented the IFB produces error of typically
2% in Vout which maybe eliminated at room temperature
by trimming R1. To improve the accuracy chooses the
value of R2=100K and this reduces the error by 0.17%
and increases the resistor program current by 12uA. The
TS2951/A typically draw 60uA at no load with pin 2
open-circuit, and this value does not look much.
Block Diagram and Typical Applications Circuit
Figure 2. Adjust Voltage
TS2950-51 series
5-6
2003/12 rev. B
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet TS2950.PDF ] | |
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