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T6330A

TM Technology Inc. reserves the right

P. 4

Publication Date: JAN. 2008

to change products or specifications without notice.

Revision: A

Applications Information

Like any voltage regulator, the external capacitors used for the T6330A must be carefully selected

for regulator stability and performance. Using a capacitor whose value is > 10uF on the T6330A

input and the amount of capacitance can be increased without limit. The input capacitor must be

located a distance of not more than 0.5 inch from the input pin of the IC and returned to a clean

analog ground. Any good quality ceramic or tantalum can be used for this capacitor. The capacitor

with larger value and lower ESR (equivalent series resistance) provides better PSRR and line-

transient response.

The output capacitor must meet both requirements for minimum amount of capacitance and ESR in

all voltage regulator application. The T6330A is designed specifically to work with low ESR

ceramic output capacitor in space-saving and performance consideration. Using a ceramic capacitor

whose value is at least 10uF with ESR is more than 20mΩ on the T6330A output ensures stability.

The T6330A still works well with output capacitor of other types due to the wide stable ESR range.

Output capacitor of larger capacitance can reduce noise and improve load transient response,

stability and PSRR.The output capacitor should be located with in 0.5 inch from the VOUT pin of

the T6330A and returned to a clean analog ground.

Enable Function

The T6330A features an voltage regulator enable/disable function. To assure the T6330A voltage

regulator will switch on, the EN turn on control level must be greater than 1.2V. The T6330A

voltage regulator will go into shutdown mode when the voltage on the EN pin falls below 0.4V. The

T6330A equips a quick-discharge function to protect the system. When the regulator is turned off

by EN pin, the internal MOSFET between VOUT and GND will be turned on to discharge output

voltage quickly. If the enable function is not needed in a specific application, it may be tied to

GND/VIN to keep the voltage regulator in a continuously on state.