MAX16913AGEE(2015) Просмотр технического описания (PDF) - Maxim Integrated

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MAX16913AGEE
(Rev.:2015)

Remote Antenna Current-Sense Amplifier and Switches

Maxim Integrated 

MAX16913/MAX16913A

Remote Antenna Current-Sense

Amplifier and Switches

General Description

The MAX16913/MAX16913A high-voltage high-side cur-

rent-sense switches feature internal current limiting to

prevent system damage due to fault conditions. The

MAX16913/MAX16913A input voltage range extends

from 5V to 18V, making them ideal for providing phantom

power to remote radio-frequency low-noise amplifiers

(LNAs) in automotive applications.

The MAX16913/MAX16913A monitor the load current

and provide an analog output voltage proportional to the

sensed load current. In addition to current sensing, accu-

rate internal current-limiting circuitry protects the input

supply against both overload and short-circuit conditions.

Two open-drain fault indicator outputs notify the micro-

processor when a short circuit, an open-load condition, or

a short-to-battery condition exists. For the MAX16913A,

the open-load threshold is externally adjustable using a

resistive divider.

A fault-blanking feature enables the circuit to ignore

momentary faults, such as those caused by the initial

charging of a capacitive load when hot swapping, prevent-

ing false alarms to the system. Built-in thermal-overload

protection turns off the switch when the die temperature

exceeds +150°C (min). The MAX16913/MAX16913A also

feature a short-to-battery detection every time the internal

switch turns on. These devices provide an active-high

control input to put the devices in low-power shutdown

mode.

The MAX16913/MAX16913A are available in the 16-pin

QSOP package and operate over the -40°C to +105°C

temperature range.

Applications

●● Remote LNA Phantom Power

●● Automotive Safety and Infotainment

Pin Configuration, Functional Diagrams, and Ordering

Information appear at end of data sheet.

Features

●● Switch Phantom Power-On/-Off Under μC Control

●● Analog Current Measurement Output

●● Adjustable Current Limiting (340mA Maximum)

●● Detect Open-Load and Short-Circuit Conditions

●● Provide Open-Drain Fault Signals (SC and OL)

●● Overcurrent Blanking During Startup

●● Thermal Shutdown

●● AECQ100 Qualified (/V Versions Only)

●● -40°C to +105°C Operating Temperature Range

Typical Application Circuits

BATTERY

INPUT

TO

PROTECTED

LOAD (LNA)

IN

3.3V TO 5V

SENS OUT

REF

MAX16913 OLT

SC

OL

SHDN

GND

AOUT

TO ADC INPUT

BATTERY

INPUT

IN

3.3V TO 5V

SENS OUT

REF

MAX16913A OLT

SC

OL

SHDN

GND

AOUT

TO

PROTECTED

LOAD (LNA)

TO ADC INPUT

19-4186; Rev 1; 8/15

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