1A Ultra Low Dropout Linear Regulator

TJ3964

Dec. 2009 – Rev. 1.1

- 8 -

HTC

APPLICATION INFORMATION

Output Adjustment (Adjustable Version)

An adjustable output device has output voltage range of 1.145V to 5.0V. To obtain a desired output

voltage, the following equation can be used with R1 resistor. The sum of R1 and R2 should be in range

of 1kΩ to 100kΩ.

68uF

68uF

EN

ADJ

TJ3964

GND

INPUT

OUTPUT

EN

R2

R1

⎟

⎠

⎞

⎜

⎝

⎛

−

=

1

1.145

V

R1

R2

OUT

SENSE Pin

In applications where the regulator output is not very close to the load, the TJ3964 can provide better

remote load regulation characteristics using the SENSE pin. TJ3964 regulates the voltage at the output

pin. Hence, the voltage at the remote load will be lower than the voltage at the output pin as a value of

the voltage drop across the trace series resistance. If the sense option pin is not required, the sense pin

at the remote load because the TJ3964 regulates the voltage at the sense pin when the sense option pin

is used.

+

-

+

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