Remote Antenna Current-Sense

Amplifier and Switches

8

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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

device by turning off the internal charge pump and the

switch. These devices also feature an overvoltage lock-

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).

RETRY

TURN-ON WITH A HEAVY LOAD

LOAD CURRENT

SHDN

SC

RETRY

TURN-ON INTO A TEMPORARY HEAVY LOAD

LOAD CURRENT

SHDN

SC

Figure 2. Overcurrent Timing Diagram

Table 1. Status Truth Table

SC OL

DEVICE STATUS

0

0

0.4V

OUT Short-to-Battery

01

Cycling While Autoretrying

Short-Circuit Condition

1

0

0.4V

Open-Load Condition

11

Normal Operation