TS39301/2/3/4

1-7

2005/12 rev. A

TS39301/2/3/4

3A Ultra Low Dropout Positive Voltage Regulator

Low Dropout Voltage 0.4V (typ.)

Output Current 3A

Low Quiescent Current

General Description

The TS39301/2/3/4 are 3A ultra low dropout linear voltage regulators that provide low voltage, high current output with

a minimum of external components. The TS39301/2/3/4 offers extremely low dropout (typically 400mV at 3A) and low

quiescent current (typically 36mA at 3A).

The TS39301/2/3/4 is ideal for PC add-in cards that need to convert from standard 3.3V to 2.5V or 2.5V to 1.8V. A

guaranteed maximum dropout voltage of 500mV over all operating conditions allows the TS39301/2/3/4 to provide

2.5V from a supply as low as 3V, and 1.8V from a supply as low as 2.5V. The TS39301/2/3/4 also has fast transient

response for heavy switching applications. The device requires only 47uF of output capacitor to maintain stability and

achieve fast transient response.

On the TS39301/2/3/4, the enable pin may be tied to input voltage if it is not required for enable control. This series

are offered in 5-pin TO-220, TO-263 package.

Features



Dropout voltage typically 0.4V @Io=3A



Output current up to 3A



Low ground current



Current limiting and Thermal shutdown



Extremely fast transient response



Reversed leakage protection



Reverse battery protection



TTL/CMOS compatible enable pin



Error flag output (TS39301 only)



Adjustable version (TS39302 only)



Output voltage sense (TS39303 / 4 only)

Ordering Information

Note: Where xx denotes voltage option, available are

50 = 5.0V

33 = 3.3V

25 = 2.5V

18 = 1.8V

Part No.

Operating Temp.

Package

TS39301CZ5xx

TS39302CZ5

TS39303CZ5xx

TS39304CZ5xx

TO-220-5L

TS39301CM5xx

TS39302CM5

TS39303CM5xx

TS39304CM5xx

-40 ~ +125

TO-263-5L

Applications



Battery power equipment



LDO linear regulator for PC add-in cards



PowerPC



High efficiency linear power supplies



High efficiency post regulator for switching supply



Low-voltage microcontrollers and digital logic