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TS2950CT50 A3G

P1-P3P4-P6P7-P9
TS2950
150mA Ultra Low Dropout Voltage Regulator
1/10
Version: F14
TO
-
92
General Description
The TS2950 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 is features very low quiescent current (75µA Typ.) and very low drop output voltage (Typ. 40mV at
light load and 380mV at 100mA), extremely good load and line regulation 0.05% typ. and very low output
temperature coefficient, making the TS2950 useful as a low-power voltage reference.
Features
● 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
Ordering Information
Part No. Package
Packing
TS2950CTxx B0 TO-92 1kpcs / Bulk
TS2950CTxx A3 TO-92 2kpcs / Ammo
Note: Refer to detail ordering information table.
Applications
● Battery powered systems
● SMPS Post-Regulator
● Voltage Reference
● Portable consumer equipment
● Radio control system
Absolute Maximum Ratings
Parameter Symbol Limit Unit
Input Supply Voltage V
IN
- 0.3 ~ +30 V
Power Dissipation Pd Internally Limited W
Operating Junction Temperature Range T
J
- 40 ~ +125
o
C
Storage Temperature Range T
STG
-65 ~ +150
o
C
Lead Temperature (Soldering 5 second) T
STG
260
o
C
Thermal Resistance Junction to Ambient R
ӨJA
160
o
C/W
Thermal Resistance Junction to Case R
ӨJC
80
o
C/W
Pin
Definition
1. Output
2. Ground
3. Input
TS2950
150mA Ultra Low Dropout Voltage Regulator
2/10
Version: F14
Electrical Characteristics
(V
IN
=V
OUT
+1V, T
A
=25
o
C, unless otherwise specified.)
Parameter Test Conditions (note 2) Min Typ Max Unit
Output Voltage
T
J
=25
o
C |0.985|
5.0
3.3
3.0
|1.015|
V
Full Operating temp |0.980|
|1.020|
100µA≤ I
L
≤100mA |0.975|
|1.025|
Output Voltage Temperature
Coefficient
(Note 1)
-- 50 150
ppm/
o
C
-- 20 100
Line Regulation (Note 3) 6V≤ V
IN
≤30V (Note 4) -- 0.04 0.2 %
Load Regulation (Note 3) 100µA≤ I
L
≤100mA -- 0.1 0.3 %
Dropout Voltage (Note 5)
I
L
=100µA
I
L
=100mA
--
50
380
80
450
mV
mV
Ground Current
I
L
=100uA
I
L
=100mA
--
75
8
120
12
µA
mA
Dropout Ground Current V
IN
= 4.5V, I
L
= 100µA -- 110 170 µA
Current Limit V
OUT
= 0 -- 160 250 mA
Thermal Regulation -- 0.05 0.2 %W
Output Noise, 10Hz
to 100KHz
C
L
= 1µF
C
L
= 200µF
C
L
= 3.3µF
--
--
--
430
160
100
--
--
--
µV/
rms
Note 1: Output voltage temperature coefficients defined as the worst case voltage change divided by the total
temperature range.
Note 2: Unless otherwise specified all limits guaranteed for T
j
= 25
o
C, Vin= 6V, I
L
= 100µA and C
L
= 100µF.
Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle.
Changes in output voltage due to heating effects are covered under the specification for thermal regulation.
Note 4: line regulation is guaranteed by design to 0.2%.
Note 5: Dropout Voltage is defined as the input to output differential at which the output voltage drops 100mV
below its nominal value measured at 1V differential at very low value of programmed output voltage, the minimum
input supply voltage of 2V (2.3V over temperature) must be taken in to account.
TS2950
150mA Ultra Low Dropout Voltage Regulator
3/10
Version: F14
Application Hints
External Capacitors
For the stability of the TS2950 is requires a 1µF (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
works fine; could use the film type work but are not cost efficient. For the operation of below -25
o
C solid tantalum is
recommended since the many aluminum type have electrolytes the freeze at about -30
o
C. The ESR of about 5Ω or
less and resonant frequency above 500KHz are most important parameter in the value of Capacitor. The
Capacitors value can be increased without any limit. At lower values of output current, less output capacitance is
required for stability. For the currents below 10mA the value of capacitor can be reduce to 0.33µF and 0.1µF for
1mA.
The TS2950 is not like other low dropout regulators will remain stable and regulation with no load in addition to the
internal voltage divider. This feature very important in application, it is like CMOS RAM keep-alive.
If at the input of TS2950 connected to battery or between AC filter capacitor and input is 10 inches wire then 1uF
tantalum or aluminum electrolytic capacitor should be connected between input and ground. This could cause more
problems when using higher value of external to set the output voltage. To fix this problem increasing output
capacitance to 3.3µF.
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
TS2950, 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.
the output capacitor must be increased to 3.3µF to maintain stability. These change the output noise from
430µV/rms for a 100 kHz bandwidth 5V, 3.3V & 3V output.
Block Diagram and Typical Applications Circuit
P1-P3P4-P6P7-P9

TS2950CT50 A3G

Mfr. #:
Buy TS2950CT50 A3G
Manufacturer:
Taiwan Semiconductor
Description:
LDO Voltage Regulators 0.15Amp Ultra Low Dropout 5.0v Volt Regul
Lifecycle:
New from this manufacturer.
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