NCP4629 ON Semiconductor, NCP4629 Datasheet - Page 4

• Manufacturer Part Number: NCP4629
• Description: LDO Linear Voltage Regulator
• Manufacturer: ON Semiconductor

in Figure 3.
is necessary to use protective diode D1. If there is possibility
that VOUT voltage could be negative then it is necessary to
use schottky diode D2. See Figure 4 for details. Do not force
the voltage to the VOUT pin.
Input Decoupling Capacitor (C1)
connected as close as possible to the input and ground pin of
the NCP4629. Higher values and lower ESR improves line
transient response.
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VIN
ORDERING INFORMATION
Specifications Brochure, BRD8011/D.
NCP4629HDT050T5G
NCP4629HDT060T5G
NCP4629HDT120T5G
VIN
A typical application circuit for NCP4629 series is shown
When VOUT voltage could be higher than VIN voltage it
A 470 nF ceramic input decoupling capacitor should be
470 n
470 n
C1
C1
Figure 4. Typical Application Schematic with
Figure 3. Typical Application Schematic
Device
VIN
Protective Diodes
CE
VIN
CE
NCP4629x
NCP4629x
GND
Nominal Output
GND
D 1
VOUT
Voltage
VOUT
12.0 V
5.0 V
6.0 V
APPLICATION INFORMATION
10 m
C 2
Description
Enable High
Enable High
Enable High
C 2
10 m
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VOUT
VOUT
D2
4
C1J050B
C1J060B
C1J120B
Marking
Output Decoupling Capacitor (C2)
to achieve stable operation of the IC. If tantalum capacitor
is used, and its ESR is high, the loop oscillation may result.
The capacitor should be connected as close as possible to the
output and ground pin. Larger values and lower ESR
improves dynamic parameters.
Enable Operation
on and off. The IC is switched on when a high level voltage
is applied to the CE pin. The enable pin has an internal pull
down current source. If the enable function is not needed
connect CE pin to VIN.
Thermal
necessary to provide some thermal relief. The maximum
power dissipation supported by the device is dependent
upon board design and layout. Mounting pad configuration
on the PCB, the board material, and also the ambient
temperature affect the rate of temperature increase for the
part. When the device has good thermal conductivity
through the PCB the junction temperature will be relatively
low in high power dissipation applications.
stops operation of regulator, if junction temperature is
higher than 160°C. After that, when junction temperature
decreases below 135°C, the operation of voltage regulator
would restart. While high power dissipation condition is, the
regulator starts and stops repeatedly and protects itself
against overheating.
PCB layout
while it is mounted on board. Make VIN and GND lines
sufficient. If their impedance is high, noise pickup or
unstable operation may result. Connect capacitors C1 and
C2 as close as possible to the IC, and make wiring as short
as possible.
A 10 mF ceramic output decoupling capacitor is sufficient
The enable pin CE may be used for turning the regulator
As a power across the IC increase, it might become
The IC includes internal thermal shutdown circuit that
Pins number 2 and 3 must be wired to the GND plane
DPACK−5
(Pb−Free)
DPACK−5
(Pb−Free)
DPACK−5
(Pb−Free)
Package
3000 / Tape & Reel
3000 / Tape & Reel
3000 / Tape & Reel
Shipping
†