NCP600 ON Semiconductor, NCP600 Datasheet - Page 12

• Manufacturer Part Number: NCP600
• Description: LDO Regulator
• Manufacturer: ON Semiconductor

Noise Decoupling
external noise reduction capacitor. Unlike other low noise
regulators which require an external capacitor and have slow
startup times, the NCP600 operates without a noise
reduction capacitor, has a typical 15 ms start up delay and
achieves a 50 mV
100 kHz.
Enable Operation
threshold limits are covered in the electrical characteristics
table in this data sheet. The turn−on/turn−off transient
voltage being supplied to the enable pin should exceed a
slew rate of 10 mV/ms to ensure correct operation. If the
enable function is not to be used then the pin should be
connected to V
Output Voltage Adjust
(Figure 2) to 4 times (Figure 3) the typical 1.250 V
regulation voltage via the use of resistors between the output
and the ADJ input. The output voltage and resistors are
chosen using Equation 1 and Equation 2.
Choose R2 arbitrarily t minimize errors due to the bias
current and to minimize noise contribution to the output
voltage. Use Equation 2 to find the required value for R1.
Thermal
necessary to provide some thermal relief. The maximum
*For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting
DEVICE ORDERING INFORMATION
Techniques Reference Manual, SOLDERRM/D.
NCP600SNADJT1G
NCP600SN150T1G
NCP600SN180T1G
NCP600SN280T1G
NCP600SN300T1G
NCP600SN330T1G
NCP600SN500T1G
The NCP600 is a low noise regulator and needs no
The enable pin will turn the regulator on or off. The
The output voltage can be adjusted from 1 times
Input bias current I
As power in the NCP600 increases, it might become
R1 + R2 *
V OUT + 1.250 1 ) R1
in
[V out * (I ADJ * R2)]
Device
.
rms
overall noise level between 10 Hz and
1.25
ADJ
is typically less than 150 nA.
R2
* 1 ^ R2
) (I ADJ
Marking Code
R2)
V out
1.25
LIO
LID
LIH
LIN
LIE
LIK
LIJ
* 1
http://onsemi.com
(eq. 1)
(eq. 2)
NCP600
12
power dissipation supported by the device is dependent
upon board design and layout. Mounting pad configuration
on the PCB, the board material, and the ambient temperature
affect the rate of junction temperature rise for the part. When
the NCP600 has good thermal conductivity through the
PCB, the junction temperature will be relatively low with
high power applications. The maximum dissipation the
NCP600 can handle is given by:
then the NCP600 can dissipate up to 400 mW when the
ambient temperature (T
from the following equations:
I
table or extracted from Figure TBD and Figure TBD. I
is approximately 108 mA when I
voltage of 1.250 V, the maximum input voltage will then be
3.9 V, good for a 1 Cell Li−ion battery.
Hints
wide as possible. When the impedance of these traces is
high, there is a chance to pick up noise or cause the regulator
to malfunction. Place external components, especially the
output capacitor, as close as possible to the NCP600, and
make traces as short as possible.
GND
Since T
The power dissipated by the NCP600 can be calculated
or
If a 150 mA output current is needed, the quiescent current
V
Version
1.5 V
1.8 V
2.8 V
3.0 V
3.3 V
5.0 V
in
ADJ
is taken from the data sheet electrical characteristics
and GND printed circuit board traces should be as
P D [ V IN (I GND@IOUT ) ) I OUT (V IN * V OUT )
J
V IN(MAX) [
is not recommended to exceed 125_C (T
P D(MAX) +
P D(MAX) ) (V OUT
(Pb−Free)
Package
TSOP−5
A
) is 25_C.
T J(MAX) * T A
I OUT ) I GND
out
R qJA
= 150 mA. For an output
3000/Tape & Reel
I OUT )
Shipping*
J(MAX)
(eq. 3)
(eq. 4)
(eq. 5)
GND
),