NCP4681(2011) 데이터 시트보기 (PDF) - ON Semiconductor
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NCP4681 Datasheet PDF : 18 Pages
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NCP4681, NCP4684
Output Discharger
The NCP4681D 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 increase, 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 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.
PCB layout
Make the VIN and GND line as large as practical. 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.
ORDERING INFORMATION
Device
Nominal Output
Voltage
Description
Marking
Package
Shipping†
NCP4681DMX29TCG
2.9 V
Auto discharge
B (fixed)*
XDFN0808
(Pb−Free)
10000 / Tape & Reel
NCP4681DMX33TCG
3.3 V
Auto discharge
B (fixed)*
XDFN0808
(Pb−Free)
10000 / Tape & Reel
NCP4681DMX35TCG
3.5 V
Auto discharge
B (fixed)*
XDFN0808
(Pb−Free)
10000 / Tape & Reel
NCP4681HMX35TCG
3.5 V
Enable high
B (fixed)*
XDFN0808
(Pb−Free)
10000 / Tape & Reel
NCP4681DSQ15T1G
1.5 V
Auto discharge
AQ15
SC−70
(Pb−Free)
3000 / Tape & Reel
NCP4681DSQ25T1G
2.5 V
Auto discharge
AQ25
SC−70
(Pb−Free)
3000 / Tape & Reel
NCP4681DSQ28T1G
2.8 V
Auto discharge
AQ28
SC−70
(Pb−Free)
3000 / Tape & Reel
NCP4681DSQ33T1G
3.3 V
Auto discharge
AQ33
SC−70
(Pb−Free)
3000 / 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.
*Marking codes for XDFN0808 packages are unified.
**To order other package and voltage variants, please contact your ON Semiconductor sales representative.
http://onsemi.com
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