YB1900C Datasheet, PDF (6/9 Pages) YOBON TECHNOLOGIES,INC. – Ultra Low Quiescent Current Smart Load Switch

Function Block
YB1900C
Ultra Low Quiescent Current Smart Load Switch
VIN
OUT
Slew Rate
Control
EN
Level
Shift
GND
Figure 3: Function Block
Application Information
The YB1900C features very low quiescent
current and very low R_DS(ON) and making
them ideal for battery-powered applications.
The ENABLE control pin is TTL compatible
and driven by 1.5V beyond making the
YB1900C an ideal level-shifting load
switch.
Input Capacitor Selection
A 1μF or larger input capacitor is
recommended to prevent load transients
from affecting upstream circuits. C_IN should
be located as close to the device V_IN pin as
practically. No specific required type of
capacitor is recommended for normal
operation. However, for higher current
operation, ceramic capacitors are
recommended for C_IN.
Output Capacitor Selection
For proper slew operation, a 0.1μF or
greater is recommended. The output
capacitor has also no specific capacitor
type requirement. If desired, C_OUT may be
increased without limit to accommodate
any load transient.
Reverse Output-to-Input Voltage
Conditions and Protection
Under normal conditions, there is a
parasitic diode between the output & input
of the load switch. In case of V_OUT
exceeding V_IN, this would forward bias the
internal parasitic diode and allow excessive
current flow into the V_OUT pin and possibly
damage the load switch.
YB1900C Rev.1.4
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