NCP334 データシートの表示（PDF） - ON Semiconductor
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NCP334 Datasheet PDF : 10 Pages
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NCP334, NCP335
Figure 12. Disable Time, Fall Time and Toff Time
FUNCTIONAL DESCRIPTION
Overview
The NCP334 – NCP335 are high side P channel MOSFET
power distribution switch designed to isolate ICs connected
on the battery in order to save energy. The part can be turned
on, with a range of battery from 1.2 V to 5.5 V.
Enable Input
Enable pin is an active high. The path is opened when EN
pin is tied low (disable), forcing P MOS switch off.
The IN/OUT path is activated with a minimum of Vin of
1.2V and EN forced to high level.
The auto−discharge is activated when EN pin is set to low
level (disable state).
The discharge path ( Pull down NMOS) stays activated as
long as EN pin is set at low level and VIN > 1.2 V.
In order to limit the current across the internal discharge
N−MOSFET, the typical value is set at 65 W.
Cin and Cout Capacitors
IN and OUT, 1 mF, at least, capacitors must be placed as
close as possible the part for stability improvement.
Auto Discharge (NCP335 Only)
NMOS FET is placed between the output pin and GND,
in order to discharge the application capacitor connected on
OUT pin.
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