NCP562, NCP563

http://onsemi.com

5

−400

0

Figure 9. Line Transient Response

Figure 10. Load Transient Response

3.5

1000

1

0.1

0.01

f, FREQUENCY (kHz)

0.5

1.5

1

2

2.5

10

100

−1

6

500

250

200

100

50

0

t, TIME (ms)

−0.5

1

0

4

3

150

300 350

400 450

0.5

5

60

500

250

200

100

50

0

t, TIME (ms)

−1

0.5

−0.5

0

−30

150

300 350 400 450

0

30

1

3

60

600

200

100

500

0

t, TIME (ms)

−30

0

0

400

300

700

400

800

−200

30

200

900 1000

Figure 11. Load Transient Response

Figure 12. Output Voltage Noise

DEFINITIONS

Load Regulation

The change in output voltage for a change in output current

at a constant temperature.

Dropout Voltage

The input/output differential at which the regulator output

no longer maintains regulation against further reductions in

input voltage. Measured when the output drops 3.0% below

its nominal. The junction temperature, load current, and

minimum input supply requirements affect the dropout level.

Maximum Power Dissipation

The maximum total dissipation for which the regulator

will operate within its specifications.

Quiescent Current

The quiescent current is the current which flows through

the ground when the LDO operates without a load on its

output: internal IC operation, bias, etc. When the LDO

becomes loaded, this term is called the Ground current. It is

actually the difference between the input current (measured

through the LDO input pin) and the output current.

Line Regulation

The change in output voltage for a change in input voltage.

The measurement is made under conditions of low dissipation

or by using pulse technique such that the average chip

temperature is not significantly affected.

Line Transient Response

Typical over and undershoot response when input voltage

is excited with a given slope.

Thermal Protection

Internal thermal shutdown circuitry is provided to protect

the integrated circuit in the event that the maximum junction

temperature is exceeded. When activated at typically 160

°C,

the regulator turns off. This feature is provided to prevent

failures from accidental overheating.

Maximum Package Power Dissipation

The maximum power package dissipation is the power

dissipation level at which the junction temperature reaches its

maximum operating value, i.e. 125

°C. Depending on the

ambient power dissipation and thus the maximum available

output current.