MAX16913(2015) View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX16913 Datasheet PDF : 12 Pages
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MAX16913/MAX16913A
Remote Antenna Current-Sense
Amplifier and Switches
Output Capacitor
MAX16913 Functional Diagram
In an analogous fashion to the input capacitor, an output
capacitor protects the device against transients due to
SENS
any series inductance in the output. Under no conditions
should the OUT pin voltage go below -0.3V as specified
MAX16913
OUT
in the Absolute Maximum Ratings. If a capacitor alone is
IN
not sufficient to avoid large negative transients on OUT,
then a Schottky diode should be used to clamp tran-
CURRENT
SENSE
sients that go below ground. With a 100μH output series
SHDN
inductor, a 220μF output capacitor is needed to eliminate
potential problems. With larger inductor values or smaller
capacitors, a Schottky clamp diode will be necessary.
Layout and Thermal Dissipation
FET
DRIVER AND
CONTROL
CHARGE
PUMP
OT
AOUT
REF
To optimize the switch response time to output short-
circuit condition, it is very important to keep all traces
VREF
REF
as short as possible to reduce the effect of undesirable
SC
parasitic inductance. Place input and output capacitors
VREF2
as close as possible to the device (no more than 5mm).
OL
IN and OUT must be connected with wide short traces
to the power bus. During normal operation, the power
dissipation is small and the package temperature change
OLT
GND
is minimal. If the output is continuously shorted to ground
at the maximum supply voltage, the devices are protected
because the total power dissipated during the short is
scaled down by the duty cycle imposed by the protection:
MAX16913A Functional Diagram
P(MAX)
=
VIN(MAX) × I OUT (MAX) × t BLANK
t RETRY + t BLANK
SENS
MAX16913A
OUT
IN
SHDN
CURRENT
SENSE
FET
DRIVER AND
CONTROL
CHARGE
PUMP
OT
VREF
REF
AOUT
REF
SC
VREF2
OL
OLT
GND
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