MAX16946GTE/V+ Maxim Integrated Products, MAX16946GTE/V+ Datasheet

Current & Power Monitors & Regulators Remote Antenna Current-Sense

MAX16946GTE/V+

Manufacturer Part Number
MAX16946GTE/V+
Description
Current & Power Monitors & Regulators Remote Antenna Current-Sense
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX16947GEEV.pdf (21 pages)

Specifications of MAX16946GTE/V+

Product
Current Monitors
Supply Voltage (max)
18 V
Supply Voltage (min)
4.5 V
Operating Temperature Range
- 40 C to + 105 C
Mounting Style
SMD/SMT
Package / Case
TQFN-16
Supply Current (max)
2.6 mA
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
19-5575; Rev 0; 9/10
The MAX16946/MAX16947 high-voltage, high-side, cur-
rent-sense LDO/switches feature internal current limiting
to prevent system damage due to fault conditions. The
MAX16946 provides a fixed regulated 8.5V output volt-
age or an adjustable 3.3V to 15V output voltage. The
MAX16946 can also be configured as a switch, while
the MAX16947 is only available as a switch. The input
voltage range for both devices extends from 4.5V to 18V
(45V tolerant), making the devices ideal for providing
phantom power to remote radio-frequency low-noise
amplifiers (LNAs) in automotive applications.
The devices monitor the load current and provide an
analog output voltage proportional to the sensed load
current. Accurate internal current limit protects the input
supply against both overload and short-circuit condi-
tions. Two open-drain fault indicator outputs indicate to
the microprocessor when a short circuit, an open-load
condition, or a short-to-battery condition exists. An over-
temperature shutdown is also indicated by means of the
current-sense amplifier’s output voltage.
A fault-blanking feature allows the devices to ignore
momentary faults such as those caused by the charg-
ing of capacitive loads during hot-swapping, preventing
false alarms to the system. The devices feature short-
to-battery protection to latch off the internal LDO/pass
switch during a short-to-battery event. During a thermal
overload, the devices reduce power dissipation by going
into thermal shutdown. They include an active-low, high-
voltage-compatible shutdown input to place them in low-
power shutdown mode.
The MAX16946 is available in thermally enhanced, 16-pin
TQFN-EP and QSOP-EP packages. The MAX16947 is avail-
able in a 16-pin QSOP package. Both devices operate over
the -40NC to +105NC temperature range.
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.
Note: All devices are specified over the -40°C to +105°C
operating temperature range.
/V Denotes an automotive qualified part.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
**Future product—contact factory for availability.
MAX16946GEE/V+**
MAX16946GTE/V+
MAX16947GEE/V+**
PART
_______________________________________________________________ Maxim Integrated Products 1
Ordering Information
PIN-PACKAGE
16 QSOP-EP*
16 TQFN-EP*
16 QSOP
General Description
Remote Antenna, Current-Sense and
Switch or LDO
Switch or LDO
OUTPUT
Switch
S Switch Phantom Power-On/Off Under µC Control
S Precision Adjustable Current Limit
S Regulated Output Voltage (MAX16946)—8.5V
S Current Measurement Analog Voltage Output
S Detect Open-Load and Short-Circuit Conditions
S Provide Open-Drain Fault Signals (SC and OL)
S Overcurrent Blanking During Startup
S Thermal Shutdown
S AEC-Q100 Qualified
S -40NC to +105NC Operating Temperature Range
() MAX16947
SHDN
SENS
AOUT
GND
REG
IN
Fixed or Adjustable Between 3.3V and 15V
Remote LNA Phantom Power
Automotive Safety and Infotainment
Automotive Remote Module Power
300mA (max), T
500mA (max), T
Mode Only)
HIGH
VOLTAGE
REGULATOR
REVERSE
CURRENT REF
26V/V
A
BUFFER
V
5V
REVERSE-
CURRENT
COMP
=
REF
IN
OSCILLATOR
ULVO +
REFUV
LOGIC
TIMER
CHARGE PUMP AND GATE DRIVER
SHORT-TO
BATTERY
COMP
LDO/Switches
Functional Diagram
A
A
MAX16946
MAX16947
OVLO
= +105NC
= +85NC (MAX16946 in SW
CURRENT
LIMIT COMP
SHUTDOWN
BANDGAP
THERMAL
Applications
AND
SC REF
Features
SC COMP
BUFFER
OL COMP
OUT
FB
(GND)
COMP
LIM
SC
OL
OLT
REF

Related parts for MAX16946GTE/V+

Image
Part Number
Description
Manufacturer
Datasheet
Request R
MAX7528KCWP
Part Number:
MAX7528KCWP
Description:
MAX7528KCWPMaxim Integrated Products [CMOS Dual 8-Bit Buffered Multiplying DACs]
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX7528KCWP.pdf (12 pages)
MAX3261CCJ
Part Number:
MAX3261CCJ
Description:
Single +5V, fully integrated, 1.25Gbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX3261CCJ.pdf (12 pages)
MAX3263CAG
Part Number:
MAX3263CAG
Description:
Single +5V, fully integrated, 155Mbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX3263CAG.pdf (12 pages)
MAX8809AETL+
Part Number:
MAX8809AETL+
Description:
VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM Controllers with Integrated Dual MOSFET Drivers
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX8809AETL.pdf (50 pages)
MAX1535CETJ+T
Part Number:
MAX1535CETJ+T
Description:
Highly Integrated Level 2 SMBus Battery Chargers
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX1535CETJT.pdf (39 pages)
DS2741N+
Part Number:
DS2741N+
Description:
Current Monitor and Accumulator with Integrated Sense Resistor; ; Temperature Range: -40°C to +85°C
Manufacturer:
Maxim Integrated Products
MAX13450EAUD+T
Part Number:
MAX13450EAUD+T
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
MAX13451EAUD+T
Part Number:
MAX13451EAUD+T
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
MAX17497BATE+
Part Number:
MAX17497BATE+
Description:
QFN 16/A°/AC-DC and DC-DC Peak-Current-Mode Converters with Integrated Step
Manufacturer:
Maxim Integrated Products
MAX17502FATB+T
Part Number:
MAX17502FATB+T
Description:
TDFN/A/65V, 1A, 600KHZ, SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED SWI
Manufacturer:
Maxim Integrated Products
MAX1978EVKIT
Part Number:
MAX1978EVKIT
Description:
Integrated Temperature Controller f
Manufacturer:
Maxim Integrated Products
MAX2606EUT+
Part Number:
MAX2606EUT+
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
MAX2608EUT+
Part Number:
MAX2608EUT+
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
MAX2831EVKIT+
Part Number:
MAX2831EVKIT+
Description:
EVALUATION KIT/2.4GHZ TO 2.5GHZ 802.11G/B RF TRANSCEIVER WITH INTEGRATED PA
Manufacturer:
Maxim Integrated Products
MAX4888CETI+
Part Number:
MAX4888CETI+
Description:
QFN/E/DUAL PCIE/SATA HIGH SPEED SWITCH WITH INTEGRATED BIAS RESISTOR
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX4888BETI.pdf (10 pages)

MAX16946GTE/V+ Summary of contents

Page 1

... QSOP package. Both devices operate over the -40NC to +105NC temperature range. Ordering Information PART PIN-PACKAGE MAX16946GEE/V+** 16 QSOP-EP* MAX16946GTE/V+ 16 TQFN-EP* MAX16947GEE/V+** 16 QSOP Note: All devices are specified over the -40°C to +105°C operating temperature range. /V Denotes an automotive qualified part. ...

Page 2

Remote Antenna, Current-Sense and LDO/Switches ABSOLUTE MAXIMUM RATINGS SC, OL, REG to GND ...........................................-0.3V to +6.0V OLT, LIM, FB, AOUT, REF, COMP to GND .....................................-0. IN, SENS, SHDN to GND ......................................-0.3V to +28V IN, SENS, SHDN to GND ...

Page 3

Remote Antenna, Current-Sense and ELECTRICAL CHARACTERISTICS (continued 12V 0V -40NC to +105NC, unless otherwise noted. Typical values are GND A PARAMETER SYMBOL Feedback Input Bias Current I Fixed 8.5V to LDO ...

Page 4

Remote Antenna, Current-Sense and LDO/Switches ELECTRICAL CHARACTERISTICS (continued 12V 0V -40NC to +105NC, unless otherwise noted. Typical values are GND A PARAMETER SYMBOL OLT Input Bias Current I OLT Initial Open-Load ...

Page 5

Remote Antenna, Current-Sense and ELECTRICAL CHARACTERISTICS (continued 12V 0V -40NC to +105NC, unless otherwise noted. Typical values are GND A PARAMETER SYMBOL V SHDN Input-Voltage High SHDN_HI V SHDN Input-Voltage Low ...

Page 6

Remote Antenna, Current-Sense and LDO/Switches (V = 14V 0.5ω +25 ° C, unless otherwise noted.) IN SENSE A DROPOUT VOLTAGE vs. LOAD CURRENT (SWITCHED OUTPUT) 340 320 300 280 260 240 220 T = +25°C A ...

Page 7

Remote Antenna, Current-Sense and (V = 14V 0.5ω +25 ° C, unless otherwise noted.) IN SENSE A LOAD TRANSIENT RESPONSE (5V LDO MODE) 100µs/div POWER-UP WAVEFORMS (V = 8.5V, I OUT OUT 2ms/div STARTUP WAVEFORMS (V ...

Page 8

Remote Antenna, Current-Sense and LDO/Switches (V = 14V 0.5ω +25 ° C, unless otherwise noted.) IN SENSE A HIGH-VOLTAGE LINE TRANSIENT RESPONSE (MAX16947) 100ms/div CURRENT-SENSE AMPLIFIER GAIN vs. TEMPERATURE 26.00 25.95 25.90 25.85 25.80 25.75 25.70 ...

Page 9

Remote Antenna, Current-Sense and (V = 14V 0.5ω +25°C, unless otherwise noted.) SENSE A IN DROPOUT VOLTAGE ( SENS (MAX16946 8.5V LDO CONFIGURATION) 200 I = 100mA OUT FB = REG 175 150 125 ...

Page 10

Remote Antenna, Current-Sense and LDO/Switches TOP VIEW REG FB 14 MAX16946 GND 15 EP OUT TQFN PIN NAME MAX16946 MAX16947 SENS 3 3 SHDN ...

Page 11

Remote Antenna, Current-Sense and PIN NAME MAX16946 MAX16947 12 12 REF 13 13 REG 14 — — OUT — 16 OUT — — EP Detailed Description The MAX16946/MAX16947 high-voltage, high-side, cur- rent-sense LDO/switches feature internal current limiting to ...

Page 12

Remote Antenna, Current-Sense and LDO/Switches The devices monitor the load current through an external sense resistor and perform the following actions the monitored current is lower than the set open- load current, the devices signal that there is ...

Page 13

Remote Antenna, Current-Sense and I LIM I SC LOAD CURRENT t BLANK SHDN SC Figure 1. Turn-On into Temporary Short Circuit I LIM I SC LOAD CURRENT t BLANK SHDN SC Figure 2. Turn-On into Hard Short Circuit ______________________________________________________________________________________ LDO/Switches ...

Page 14

Remote Antenna, Current-Sense and LDO/Switches I LIM I SC LOAD CURRENT t BLANK SHDN SC Figure 3. Turn-On into Temporary Heavy Load I LIM I SC LOAD CURRENT t BLANK SHDN SC Figure 4. Turn-On into Heavy Load 14 _____________________________________________________________________________________ ...

Page 15

Remote Antenna, Current-Sense and Short-to-Battery and Reverse-Current Detection It is possible for OUT to be shorted to the battery due to a fault in the system. The devices detect this failure by comparing the OUT voltage and the IN voltage ...

Page 16

Remote Antenna, Current-Sense and LDO/Switches Applications Information Choosing the Sense Resistor Ideally, the maximum load current develops the full-scale sense voltage across the current-sense resistor. The current-sense amplifier output voltage is given by ...

Page 17

Remote Antenna, Current-Sense and Current-Limit Threshold Selection A resistive divider between REF, LIM, and GND sets the current-limit threshold. See Figure 6. Use the following formula to set the desired current-limit threshold  V REF ...

Page 18

Remote Antenna, Current-Sense and LDO/Switches Layout and Thermal Dissipation To optimize the switch response time to output short- circuit condition very important to keep all traces as short as possible to reduce the effect of undesirable parasitic inductance. ...

Page 19

Remote Antenna, Current-Sense and BATTERY INPUT SUPPLY R PU ERROR FLAGS CURRENT- SENSE OUTPUT ON/OFF Figure 9. LDO with Fixed 8.5V Output BATTERY INPUT ERROR FLAGS CURRENT- SENSE OUTPUT () MAX16947 Figure 10. Input ...

Page 20

Remote Antenna, Current-Sense and LDO/Switches Chip Information PROCESS: BiCMOS 20 _____________________________________________________________________________________ Package Information For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. ...

Page 21

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 2010 Maxim Integrated Products © ...

Related keywords