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TS2950-51 series 1-6 2003/12 rev. A

TS2950/TS2951 series

150mA Ultra Low Dropout Positive Voltage Regulator

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.

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

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

Ordering Information

Note: Where xx denotes voltage option, available are

5.0V, 3.3V and 3V. Contact factory for additional

voltage options.

Part No. Operating Temp.

(Ambient)

Package

TS2950CT-xx

TS2950ACT-xx

TO-92

TS2951CS-xx

TS2951ACS-xx

-20 ~ +85

SOP-8

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

Summary of content (6 pages)

PAGE 1
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.
PAGE 2
Absolute Maximum Rating Input Supply Voltage Vin - 0.3 ~ +30 V Feedback Input Voltage Vfeedback - 1.5 ~ +30 V Shutdown Input Voltage Vshutdown - 0.3 ~ +30 V Verror - 0.
PAGE 3
TS2951/A Electrical Characteristics (continues) o (Vin=15V, Ta=25 C unless otherwise specified.) Parameter Test Conditions (note 2) Feedback Pin Bias Current Reference Voltage Temperature (Note 7) Coefficient Feedback Pin Bias Current Temperature Coefficient Min Typ Max Unit -- 20 40 nA -- 20 -- -- 0.1 -- ppm/ o C nA/oC Error Comparator Output Leakage Current VOH=30V -- 0.01 1 uA Output Low Voltage Vin=4.
PAGE 4
Application Hints External Capacitors For the stability of the TS2950/A & TS2951/A is requires a 1.0uF(0.22uF is recommended for 3.0V & 3.3V) or greater capacitor between output and ground. Oscillation could occur without this capacitor. The tantalum or aluminum electrolytic works fine; could use the film type work but are not cost efficient. For the operation of below o -25 C solid tantalum is recommended since the many aluminum type have electrolytes the freeze at about -30 o C.
PAGE 5
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.
PAGE 6
TO-92 Mechanical Drawing A DIM B A B TO-92 DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX 4.30 4.30 4.70 4.70 0.169 0.169 0.185 0.185 C D E E C H F 14.30(typ) 0.43 2.19 0.563(typ) 0.49 2.81 0.017 0.086 0.019 0.111 F 3.30 3.70 0.130 0.146 G H 2.42 0.37 2.66 0.43 0.095 0.015 0.105 0.017 G D SOP-8 Mechanical Drawing A SOP-8 DIMENSION DIM 9 16 B 1 P 8 G R C D TS2950-51 series M F K 6-6 MILLIMETERS MIN MAX INCHES MIN MAX A 4.80 5.00 0.189 0.196 B C 3.80 1.