TS4264G datasheet(3/5 Pages) TSC

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TS4264G

5V/150mA Fixed-Voltage Ultra Low LDO

3/5

Version: A08

Application Information

In the TS4264GCW50 the output voltage is divided and compared to an internal reference of 2.5V typical. The

regulation loop controls the output to achieve an output voltage of 5V with an accuracy of ±3% at an input voltage

range of 5.5V~45V.

Circuit Description

The control amplifier compares a reference voltage, which is kept highly precise by resistance adjustment, to a voltage

that is proportional to the output voltage and drives the base of the series transistor via a buffer. Saturation control,

working as a function of load current, prevents any over-saturation of the power element. The IC is additionally

protected against overload, over temperature and reverse polarity

Typical Application Circuit

Dimensioning Information on External Components

The input capacitor CIN is necessary for compensating line influences. Using a resistor of approx. 1Ω in series with CIN,

the oscillating of input inductivity and input capacitance can be clamped. The output capacitor COUT is necessary for the

stability of the regulating circuit. Stability is guaranteed at values COUT ≥10uF and an ESR ≤ 4Ω within the operating

temperature range.

The application circuit shows additional electrolytic input capacitor of 470uF is added in order to buffer supply line

influences. This capacitor is recommended, if the device is sourced via long supply lines of several meters.

The TS4264GCW50 can supply up to 150mA. However for protection for high input voltage above 25V, the output

current is reduced (SOA protection).

TS4264G Datasheet(PDF) 3 Page - Taiwan Semiconductor Company, Ltd