TS2938CS50 RLG Datasheet TS2938CS50 RLG, TS2938CS33 RLG | P1-P3

TS2938

Taiwan Semiconductor

Document Number: DS_P0000209 1 Version: G15

500mA Ultra Low Dropout Voltage Regulator

With Inhibit Function

DESCRIPTION

The TS2938 series of fixed-voltage monolithic micro-

power voltage regulators is designed for a wide range of

applications. This device excellent choice of use in

battery-power application. Furthermore, the quiescent

current increases on slightly at dropout, which prolongs

battery life. This series of fixed-voltage regulators

features very low ground current (200µA Typ.), very low

drop output voltage (Typ. 60mV at light load and 600mV

at 500mA) and output inhibit control. This includes a

tight initial tolerance of 2%, extremely good line

regulation of 0.05% typ., and very low output

temperature coefficient.

FEATURES

● Dropout voltage typically 0.5V @Io=500mA

● Output current up to 500mA

● Logic Control Electronic Shutdown

● Output voltage trimmed before assembly

● -18V Reverse peak voltage

● +30V Input over voltage protection

● +60V Transient peak voltage

● Low Quiescent Current 100µA (Typ.) (On Mode)

● Internal current limit

● Thermal shutdown protection

APPLICATION

● Telecommunication

SO

P

-

8

Definition

:

1. Output

2. Ground

3. Ground

4. NC

5. Inhibit

6. Ground

7. Ground

8. Input

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

TYPICAL APPLICATION CIRCUIT

TS2938

Taiwan Semiconductor

Document Number: DS_P0000209 2 Version: G15

ABSOLUTE MAXIMUM RATINGS

(

Note

1

)

PARAMETER SYMBOL LIMIT UNIT

Input Supply Voltage

(Note 2)

V

IN

-18 ~ +60

V

Operation Input Supply Voltage

V

OPR

26

V

Power Dissipation

(Note 3)

P

D

Internally Limited W

Operating Junction Temperature Range T

J

-40 ~ +125

o

C

Storage Temperature Range

T

STG

-65 ~ +150

o

C

THERMAL PERFORMANCE

PARAMETER SYMBOL LIMIT UNIT

Junction to Case Thermal Resistance R

ӨJC

20 °C/W

Notes: R

ӨJA

is the sum of the junction-to-case and case-to-ambient thermal resistances. The case thermal reference is defined

at the solder mounting surface of the drain pins. R

ӨJA

is guaranteed by design while R

ӨCA

is determined by the user’s board

design. R

ӨJA

shown below for single device operation on FR-4 PCB in still air.

ELECTRICAL SPECIFICATIONS

(V

IN

=V

OUT

+1V, I

L

=5mA, C

O

=10µF, T

A

=25

o

C, unless otherwise noted)

PARAMETER CONDITIONS MIN TYP MAX UNIT

Output Voltage

T

A

=25

o

C

3.23 3.3 3.36

V

4.9 5 5.1

T

A

=25~85

o

C

3.17 3.3 3.43

4.8 5 5.2

Output Voltage Temperature Coefficient -- 50 150 ppm/

o

C

Line Regulation Vo+1V ≤ V

IN

≤ 26V -- 0.05 0.5 %

Load Regulation 5mA ≤ I

L

≤ 500mA -- 0.2 1.0 %

Dropout Voltage

(Note 4)

I

L

=100mA

-- 100

200

mV I

L

=300mA

-- 300 400

I

L

=500mA

-- 500 600

Quiescent Current

(Note 5)

I

L

=100µA

-- 200 300 µA

I

L

=300mA

-- 12 20

mA

I

L

=500mA

-- 25 50

Short Circuit Current

(Note 6)

V

OUT

=0

-- 0.9 1.3 A

Output Noise,

10Hz

to 100KHz, I

L

=10mA

C

L

=2.2µF

-- 500 --

µVrms C

L

=3.3µF

-- 350 --

C

L

=33µF -- 120 --

Ripple Rejection

Ratio

60 -- -- dB

TS2938

Taiwan Semiconductor

Document Number: DS_P0000209 3 Version: G15

ELECTRICAL SPECIFICATIONS

(V

IN

=V

OUT

+1V, I

L

=5mA, C

O

=10µF, T

A

=25

o

C, unless otherwise noted)

PARAMETER CONDITIONS MIN TYP MAX UNIT

Shutdown Input

Input Logic Voltage

Low (Regulator ON)

-- 1.3 0.7

V

High (Regulator OFF)

2.0 -- --

Shutdown Pin Input Current

V

INHIBIT

= 2.4V

-- 30 50

µA

V

INHIBIT

= 26V

-- 450 600

Regulator Output Current in Shutdown V

INHIBIT

≤ 2V, V

IN

≤ 26V

V

OUT

=0V

-- -- 200

Note:

1. Absolute Maximum Rating is limits beyond which damage to the device may occur.

For guaranteed specifications and test conditions see the electrical characteristics.

2. Maximum positive supply voltage of 60V must be limited duration (<100ms) and duty cycle (<1%).

3. The maximum allowable power dissipation is a function of the maximum junction temperature, T

J

, the junction

to ambient thermal resistance, R

ӨJA

, and the ambient temperature, Ta. Exceeding the maximum allowable

power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. The

effective value of R

ӨJA

can be reduced by using a heatsink.

4. Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its

nominal value measured at 1V differential.

5. Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the

ground pin current and output load current.

6. Output current will decrease with increasing temperature, but it will be not dropped below 500mA at the

maximum specified temperature.

TS2938CS50 RLG

TS2938CS50 RLG

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