TS4264G_08 Datasheet, PDF (3/5 Pages) Taiwan Semiconductor Company, Ltd – 5V/150mA Fixed-Voltage Ultra Low LDO

TS4264G
5V/150mA Fixed-Voltage Ultra Low LDO
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 C_IN is necessary for compensating line influences. Using a resistor of approx. 1Ω in series with C_IN,
the oscillating of input inductivity and input capacitance can be clamped. The output capacitor C_OUT is necessary for the
stability of the regulating circuit. Stability is guaranteed at values C_OUT ≥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).


3/5
Version: A08