NCP4588
http://onsemi.com
14
APPLICATION INFORMATION
A typical application circuit for NCP4588 series is shown
in Figure 45.
VIN VOUT
CE
GND
C1 C2
100 n 100n*
VIN VOUT
NCP4588x
* output capacitor
may be omitted
Figure 45. Typical Application Schematic
Input Decoupling Capacitor (C1)
A 100 nF ceramic input decoupling capacitor should be
connected as close as possible to the input and ground pin of
the NCP4588. Higher values and lower ESR improves line
transient response.
Output Decoupling Capacitor (C2)
The output capacitor may be not used even if the load
current is varied, but if load variation is very large it is better
to use an output capacitor in the range of 0.1 mF to 10 mF. It
is recommended to use ceramic capacitor; tantalum
capacitor with higher ESR may cause unstable output.
Enable Operation
The enable pin CE may be used for turning the regulator
on and off. The regulator is switched on when the CE pin
voltage is above logic high level. The enable pin has internal
pull down current source. If enable function is not needed
connect CE pin to VIN.
Output Discharger
The D version includes a transistor between VOUT and
GND that is used for faster discharging of the output
capacitor. This function is activated when the IC goes into
disable mode.
Thermal
As power across the IC increases, it might become
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 rise for the part.
That is to say, when the device has good thermal
conductivity through the PCB, the junction temperature will
be relatively low with high power dissipation applications.
PCB layout
Make VIN and GND line sufficient. If their impedance is
high, noise pickup or unstable operation may result. Connect
capacitors C1 and C2 (if it is used) as close as possible to the
IC, and make wiring as short as possible.
ORDERING INFORMATION
Device
Nominal Output
Voltage
Description Marking Package Shipping
†
NCP4588DSQ10T1G 1.0 V Auto discharge P010
SC−70
(Pb−Free)
3000 / Tape & Reel
NCP4588DSQ15T1G 1.5 V Auto discharge P015
SC−70
(Pb−Free)
3000 / Tape & Reel
NCP4588DSQ25T1G 2.5 V Auto discharge P025
SC−70
(Pb−Free)
3000 / Tape & Reel
NCP4588DMX10TCG 1.0 V Auto discharge LA
XDFN
(Pb−Free)
5000 / Tape & Reel
NCP4588DMX15TCG 1.5 V Auto discharge LF
XDFN
(Pb−Free)
5000 / Tape & Reel
NCP4588DMX25TCG 2.5 V Auto discharge LR
XDFN
(Pb−Free)
5000 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
NOTE: To order other package and voltage variants, please contact your ON Semiconductor sales representative.
