MAX16913AGEE Просмотр технического описания (PDF) - Maxim Integrated

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MAX16913AGEE

Remote Antenna Current-Sense Amplifier and Switches

Maxim Integrated 

Remote Antenna Current-Sense

Amplifier and Switches

TURN-ON WITH A HEAVY LOAD

2 x ISC

ISC

LOAD CURRENT

tBLANK

SHDN

SC

tRETRY

RETRY

TURN-ON INTO A TEMPORARY HEAVY LOAD

2 x ISC

ISC

LOAD CURRENT

tBLANK

tRETRY

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

VAOUT

0 0 0.4V

0 1 Cycling While Autoretrying

1 0 0.4V

1 1 (VIN - VSENS) 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 VIN is

greater than VOVLO, 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).

8 _______________________________________________________________________________________

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