TS5205

150mA Low Noise LDO Voltage Regulator

with Enable Function

5/7

Version: B07

Application Information (Continue)

Dual Supply Operation

When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage must

be diode clamped to ground.

Thermal Characteristics

TS5205 series is designed to provide 150mA (5V version) of continuous current in a very small package. Maximum

power dissipation can be calculated based on the output current and the voltage drop across the part. To determine

the maximum power dissipation of the package, use the junction-ambient thermal resistance of the device and the

following basic equation:

layout dependent, the actual power dissipation of the regulator circuit can be determined using the equation:

Substituting Pd(max) for Pd and solving for the operating conditions that are critical to the application will give the

maximum operating conditions for the regulator circuit. For example, when operating the TS5205CX33 at room

temperature with a minimum footprint layout, the maximum input voltage for a set output current can be determined

as follows:

The junction to ambient thermal resistance for the minimum footprint is 220

must not be exceeded for proper operation. Using the output voltage of 3.3V and an output current of 120mA, the

maximum input voltage can be determined. From the electrical characteristics table, the maximum ground current for

120mA output current is 2.5mA.

Therefore, a 3.3V application at 150mA of output current can accept a maximum input voltage of 6.23V in a SOT-25

package.

Fixed Output Regulator Design

Ultra Low Noise Fixed Voltage Application

Includes a 470pF capacitor for low noise operation and

shows EN connected to IN for an application where

Low Noise Fixed Voltage Application

An example of a low noise configuration where

EN

on

off

2.2uF

TS5205CX5xx

2.2uF

470pF

TS5205CX5xx