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PDF MAX16913 Data sheet ( Hoja de datos )
| Número de pieza | MAX16913 | |
| Descripción | Remote Antenna Current-Sense Amplifier And Switches | |
| Fabricantes | Maxim Integrated Products | |
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19-4186; Rev 0; 7/08
EVAALVUAAILTAIOBNLEKIT
Remote Antenna Current-Sense
Amplifier and Switches
General Description
The MAX16913/MAX16913A high-voltage high-side
current-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 phan-
tom power to remote radio-frequency low-noise ampli-
fiers (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,
accurate internal current-limiting circuitry protects the
input supply against both overload and short-circuit
conditions. Two open-drain fault indicator outputs notify
the microprocessor 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,
preventing 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
www.DatetamShpeeerta4Utu.creomrange.
Applications
Remote LNA Phantom Power
Automotive Safety and Infotainment
Ordering Information
PART
MAX16913GEE+
MAX16913GEE/V+*
MAX16913AGEE+
MAX16913AGEE/V+*
TEMP
RANGE
-40°C to
+105°C
-40°C to
+105°C
-40°C to
+105°C
-40°C to
+105°C
PIN- OPEN-LOAD
PACKAGE THRESHOLD
16 QSOP Internally Set
16 QSOP Internally Set
16 QSOP
16 QSOP
Externally
Adjustable
Externally
Adjustable
+Denotes a lead(Pb)-free/RoHS-compliant package.
*/V denotes an automotive qualified part.
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
♦ AEC-Q100 Qualified (/V Versions Only)
♦ -40°C to +105°C Operating Temperature Range
Typical Operating Circuits
BATTERY
INPUT
3.3V TO 5V
IN SENS OUT
REF
MAX16913 OLT
TO
PROTECTED
LOAD (LNA)
SC
OL
SHDN GND AOUT
TO ADC INPUT
BATTERY
INPUT
3.3V TO 5V
IN SENS OUT
REF
MAX16913A OLT
TO
PROTECTED
LOAD (LNA)
SC
OL
SHDN GND AOUT
TO ADC INPUT
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1 page  
Remote Antenna Current-Sense
Amplifier and Switches
Pin Description
PIN
1, 8, 9, 16
2
3, 4
NAME
GND
IN
SENS
FUNCTION
Ground
Input Voltage. Bypass IN to GND with a low-ESR ceramic capacitor with a minimum value of 0.1µF.
Input to Current-Sense Amplifier. Connect the sense resistor between SENS and IN.
5, 6 OUT Switch Output
7 SHDN Active-High Control Input. Drive SHDN low to turn on the device.
10 N.C. No Connection. Not internally connected.
11
OLT
Open-Load Threshold Setting Input. A resistive divider between REF, OLT, and GND sets the open-load
current threshold (MAX16913A). For the MAX16913, connect OLT to GND.
12
REF
+3V Nominal Reference Output. Use a resistive divider between REF, OLT, and ground to set the open-load
current threshold (MAX16913A). The output impedance of this voltage regulator is 5kΩ.
13
AOUT
Current-Monitor Voltage Output. AOUT can be used to measure the load current by means of an external
ADC. The output impedance is 5kΩ.
14
OL
Open-Drain Open-Load Indicator Output. OL goes low when the load current is lower than the open-load
current threshold, or when there is a short-to-battery fault. Connect OL to a 10kΩ pullup resistor. See Table 1.
15
SC
Open-Drain Short-Circuit Indicator Output. SC goes low when the load current is greater than the short-circuit
current threshold or when there is a short-to-battery fault. Connect SC to a 10kΩ pullup resistor. See Table 1.
MAX16913 Functional Diagram
SENS
www.DataSheet4U.cMoAmX16913
IN
SHDN
CURRENT
SENSE
FET
DRIVER AND
CONTROL
VREF
SC
VREF2
OL
CHARGE
PUMP
OT
REF
OUT
AOUT
REF
OLT GND
MAX16913A Functional Diagram
SENS
IN
SHDN
SC
OL
MAX16913A
CURRENT
SENSE
FET
DRIVER AND
CONTROL
VREF
VREF2
CHARGE
PUMP
OT
REF
OUT
AOUT
REF
OLT GND
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MAX16913.PDF ] | |
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