MAX16913 Datasheet, PDF (8/10 Pages) Maxim Integrated Products – Remote Antenna Current-Sense Amplifier and Switches

Remote Antenna Current-Sense
Amplifier and Switches
TURN-ON WITH A HEAVY LOAD
2 x I_SC
I_SC
LOAD CURRENT
t_BLANK
SHDN
SC
t_RETRY
RETRY
TURN-ON INTO A TEMPORARY HEAVY LOAD
2 x I_SC
I_SC
LOAD CURRENT
t_BLANK
t_RETRY
SHDN
RETRY
SC
Figure 2. Overcurrent Timing Diagram
Undervoltage and Overvoltage Lockout
The MAX16913/MAX16913A include undervoltage cir-
cuitry (UVLO) to prevent erroneous switch operation
when the input voltage goes below approximately
4.25V during startup and brownout conditions. Input
voltages of less than 4.25V inhibit operation of the
Table 1. Status Truth Table
SC OL
V_AOUT
0 0 0.4V
0 1 Cycling While Autoretrying
1 0 0.4V
1 1 (V_IN - V_SENS) x 13 + 0.4V
DEVICE STATUS
OUT Short-to-Battery
Short-Circuit Condition
Open-Load Condition
Normal Operation
device by turning off the internal charge pump and the
switch. These devices also feature an overvoltage lock-
out (OVLO) threshold of +21V (typ). When V_IN is
greater than V_OVLO, the device immediately turns off
the switch and the internal charge pump.
Internal Reference
The MAX16913/MAX16913A feature a +3V bandgap
reference output, stable over supply voltage and tem-
perature. For the MAX16913A, the reference output is
connected to the resistive divider which sets the open-
load threshold. The output impedance of the internal
reference is 5kΩ (typ).
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