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TS2951

Taiwan Semiconductor

Document Number: DS_P0000207 1 Version: G15

150mA Ultra Low Dropout Voltage Regulator

DESCRIPTION

The TS2951 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 TS2951 is features very low quiescent current

(75µA Typ.) and very low drop output voltage (Typ.

40µV at light load and 380mV at 100mA). This includes

a tight initial tolerance of 1% (A version), extremely

good load and line regulation 0.05% typ. and very low

output temperature coefficient, making the TS2951

useful as a low-power voltage reference.

TS2951 have other key additional feature. 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 & 3.0 of

programmed from 1.24V to 29V with external pair of

resistors. Using of as design, processing and testing

techniques make TS2951 superior over similar

products.

FEATURES

● Output voltage available in 5V, 3V & 3.3V

● Extremely low quiescent current

● Low dropout voltage

● Extremely tight load and line regulation

● Very low temperature coefficient

● Need only 1µF for stability

● Use as Regulator or Reference

● Stable with low-ESR output capacitors

● Current and thermal limiting

● 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

● SMPS Post-Regulator and Voltage Reference

● Voltage Reference

● Portable consumer equipment

Definition

1. Output

2. Sense

3. Shutdown

4. Ground

5. Error flag

6. Voltage tap

7. FB

8. Input

Notes: Moisture sensitivity level: level 3. Per J-STD-020

TYPICAL APPLICATION CIRCUIT

Adjustable Regulator

Summary of content (9 pages)

PAGE 1
TS2951 Taiwan Semiconductor 150mA Ultra Low Dropout Voltage Regulator DESCRIPTION FEATURES The TS2951 are low power voltage regulators. These ● Output voltage available in 5V, 3V & 3.3V devices are excellent choice for use in battery-powered ● Extremely low quiescent current applications such as cordless telephone, radio control ● Low dropout voltage systems, and portable computers.
PAGE 2
TS2951 Taiwan Semiconductor ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL LIMIT UNIT Input Supply Voltage VIN -0.3 ~ +30 V Feedback Input Voltage VFB -1.5 ~ +30 V Shutdown Input Voltage VSHUTDOWN -0.3 ~ +30 V VERROR -0.
PAGE 3
TS2951 Taiwan Semiconductor ELECTRICAL SPECIFICATIONS (VIN=VOUT+1V, TA=25oC, unless otherwise specified.) CONDITIONS(Note 2) PARAMETER MIN TYP MAX UNIT -- 20 40 nA -- 20 -- ppm/ C -- 0.1 -- nA/ C VOH= 30V -- 0.01 1 µA VIN= 4.
PAGE 4
TS2951 Taiwan Semiconductor ORDERING INFORMATION OUTPUT VOLTAGE PACKAGE PACKING 5.0V TS2951CS50 RLG PART NO. SOP-8 2,500pcs / 13” Reel 3.3V TS2951CS33 RLG SOP-8 2,500pcs / 13” Reel 3.0V TS2951CS30 RLG SOP-8 2,500pcs / 13” Reel Note: 1. Compliant to RoHS Directive 2011/65/EU and in accordance to WEEE 2002/96/EC. 2. Halogen-free according to IEC 61249-2-21 definition.
PAGE 5
TS2951 Taiwan Semiconductor BLOCK DIAGRAM APPLICATION INFORMATION External Capacitors For the stability of the TS2951 is requires a 1.0µF (0.22µF 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 o works fine; could use the film type work but are not cost efficient.
PAGE 6
TS2951 Taiwan Semiconductor APPLICATION INFORMATION (CONTINUE) Reducing Output Noise It could be an advantage to reduce the AC noise present at the output. One method is to reduce the regulator bandwidth by increasing the value of the output capacitor. This is the only method that noise could reduce on the TS2951, but is relatively inefficient, as increasing capacitor from 1µF to 220µF only decreases the noise from 430µV to 160µVrms for a 100KHz bandwidth at 5V output.
PAGE 7
TS2951 Taiwan Semiconductor CHARACTERISTICS CURVES (TA = 25°C unless otherwise noted) Figure 1. Line Regulation vs. Input Voltage Figure 2. Load Regulation vs. Output Current Figure 3. Ground Pin Current vs. Output Current Figure 4. Ground Pin Current vs. Input Voltage Figure 5. Dropout Voltage vs. Output Current Document Number: DS_P0000207 Figure 6.
PAGE 8
TS2951 Taiwan Semiconductor PACKAGE OUTLINE DIMENSIONS (Unit: Millimeters) SOP-8 SUGGESTED PAD LAYOUT (Unit: Millimeters) MARKING DIAGRAM XX = Voltage Code (50=5.0V, 33=3.3V, 30=3.
PAGE 9
TS2951 Taiwan Semiconductor Notice Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, to any intellectual property rights is granted by this document.