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| YB1900 Datasheet, PDF (7/8 Pages) YOBON TECHNOLOGIES,INC. – Ultra Low Quiescent Current Smart Load Switch | |||
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YB1900
Ultra Low Quiescent Current Smart Load Switch
Constraints for the YB1900 are maximum
junction temperature TJ(MAX) = 125â, and
package thermal resistance, θJA = 220â/W.
The maximum continuous output current for
YB1900 depends on package power
dissipation and the RDS(ON) of MOSFET at
TJ(MAX). Typical conditions are calculated
under normal ambient condition where TA =
25â At 85â, PD(MAX) = 181mW. At TA = 25â,
PD(MAX) = 454mW.
The maximum current is calculated by the
following equation:
IOUT < (PD(MAX) / RDS(MAX))^(1/2)
For example, if VIN = 5V, RDS(MAX) = 100mâ¦
and TA = 25â, IOUT(MAX) = 2.2A.
Thermal Shutdown is employed to protect
the device damage when over temperature
160â.
PCB Layout Consideration
To maximize YB1900 performance, some
board layout rules should be followed:
VIN and VOUT should be routed using wider
than normal traces, and GND should be
connected to a ground plane. For best
performance, CIN and COUT should be
placed close to the package pins.
YB1900 MRev.1.2
www.yobon.com.tw
7
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