Home >> FPF2144 Search >> Fairchild Semiconductor FPF2144 Datasheet

FPF2144 Datasheet

Full Function Load Switch

No Preview Available !

FPF2144 datasheet pdf
Application Notes
Startup Power Sequence
VIN1 FPF2140/2/ VOUT1
To Load
VIN2 FPF2140/2/ VOUT2
To Load
Power good function in sequential startup. No battery is loaded to the output
Power Good
FPF214X family has a "Power Good" feature. PGOOD pin is an
open-drain MOSFET which asserts high when the output
voltage reaches 90% of the input voltage.
PGOOD pin requires an external pull up resistor that is
connected to the output voltage when there is no battery in the
load side and the logic level of the subsequent controller
permits. This would give logic levels similar to a CMOS output
stage for PGOOD, while still keeping the option to tie the pull-up
to a different supply voltage. A typical value of 100Kis
recommended to be used as pull up resistor. The PGOOD pin
status is independent of the ON pin position. This mean that
PGOOD pin stays low when the load switch is OFF. If the Power
Good feature is not used in the application the pin can be
connected directly to GND.
Sequential Startup using Power Good
The power good pin can be connected to another load switch's
enable pin to implement sequential startup. PGOOD pin asserts
low when the load switch is OFF. This feature allows driving a
subsequent circuit. The above diagram illustrates power good
function in sequential startup. As the VOUT1 of the first load
switch starts to ramp to the 90% of its input voltage the second
switch remains in OFF state. Whereas the VOUT1 passes the
90% threshold, power good signal becomes active and asserts
high. This signal will turn on the second load switch and VOUT2
will start to increase. The total startup time may vary according
to the difference between supply voltages that are used in the
FPF2140/42/43/44/46/47 Rev. I
Fairchild Semiconductor
Fairchild Semiconductor

   PDF Click to Download PDF File

Related Start with FPF214*

[ FPF2140 Fairchild Semiconductor ]     [ FPF2142 Fairchild Semiconductor ]     [ FPF2143 Fairchild Semiconductor ]     [ FPF2144 Fairchild Semiconductor ]     [ FPF2146 Fairchild Semiconductor ]     [ FPF2147 Fairchild Semiconductor ]     [ FPF2148 Fairchild Semiconductor ]     [ FPF2100 Fairchild Semiconductor ]     [ FPF2101 Fairchild Semiconductor ]     [ FPF2102 Fairchild Semiconductor ]     [ FPF2103 Fairchild Semiconductor ]     [ FPF2104 Fairchild Semiconductor ]     [ FPF2105 Fairchild Semiconductor ]     [ FPF2106 Fairchild Semiconductor ]     [ FPF2107 Fairchild Semiconductor ]     [ FPF2108 Fairchild Semiconductor ]     [ FPF2109 Fairchild Semiconductor ]    

Searches related to FPF2144 part

Find Chips CBC RS online RUTRONIK 24
Component Distributors NexGen Digital Richardson RFPD ICC
Beyond Components NAC PEI-Genesis Powell Electronics
TME Ameya 360 Power & Signal Datasheets360
Freelance Electronics Sager Electronics Terminals & Connectors TTI

0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
@ 2014 :: DatasheetsPDF.com :: Semiconductors Datasheet Search & Download Site