TPS7B7702-Q1 Datasheet, PDF (1/28 Pages) Texas Instruments – TPS7A4001-EP 100-V Input Voltage, 50-mA, Very High Voltage Linear Regulator

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TPS7B7701-Q1, TPS7B7702-Q1
SLVSCE8A – JANUARY 2015 – REVISED MAY 2015
TPS7B770x-Q1 Single- and Dual-Channel Antenna LDO With Current Sense
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification 2
– Device CDM ESD Classification C4B
• Single and Dual-Channel LDO With Current
Sense and Adjustable Current-Limit
• 4.5- to 40-V Wide Input Voltage Range, 45-V
Load Dump
• Power Switch Mode When Tying FB to GND
• 1.5- to 20-V Adjustable Output Voltage
• Up to 300-mA Output Current per Channel
• Adjustable Current-Limit With External Resistor
• High Accuracy Current-Sense to Detect Antenna
Open Condition at Low Current Without Further
Calibration
• High Power-Supply Rejection Ratio: Typical 73 dB
at 100 Hz
• Integrated Reverse-Polarity Protection, Down to
–40 V and No Need for External Diode
• 500-mV maximum Dropout Voltage at 100-mA
Load
• Stable With Output Capacitor in 2.2 to 100-µF
Range (ESR 1 mΩ to 5 Ω)
• Integrated Protection and Diagnostics
– Thermal Shutdown
– Undervoltage Lock Out
– Short Circuit Protection
– Reverse Battery Polarity Protection
– Reverse Current Protection
– Output Short-to-Battery Protection
– Output Inductive Load Clamp
– Multiplexing Current Sense Between Channels
and Devices
– Ability to Distinguish all Faults With Current
Sense
• 16-Pin HTSSOP PowerPad™ Package
2 Applications
• Infotainment Active-Antenna Power Supply
• Surround-View Camera Power Supply
• High-Side Power Switch For Small Current
Applications
3 Description
The TPS7B770x-Q1 family of devices is a single and
dual high-voltage LDO with current sensing designed
to operate with a wide input-voltage range from 4.5 to
40 V (45-V load dump protection). The device
provides power to the low-noise amplifiers of the
active antenna through a coax cable with 300 mA per
channel current. Each channel also provides an
adjustable output voltage from 1.5 to 20 V.
The device provides diagnostics through the current
sense and error pins. To monitor the load current, a
high-side current-sense circuitry provides a
proportional analog output to the sensed load current.
The accurate current sense allows detection of open,
normal, and short-circuit conditions without the need
for further calibration. Current sense can be
multiplexed between channels and devices to save
ADC resources. Each channel also implements
adjustable current limit with an external resistor.
The integrated reverse polarity diode eliminates the
need for an external diode. The device features
standard thermal shutdown, short-to-battery
protection on the output, and reverse current
protection.
Each channel has internal inductive clamp protection
on the output during inductive switch off. The device
operates during –40°C to 125°C ambient temperature
range.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
CHANNEL
TPS7B7701-Q1
TPS7B7702-Q1
HTSSOP (16)
Single
Dual
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Application Diagram
Battery
Input
IN
10 F
MCU I/O
MCU I/O
SENSE_EN
SENSE_SEL
SENSE1/2
TPS7B770x-Q1
OUT1/2
FB1/2
Active
Antenna
Filter Coil Filter Coil
Cable
10 F
10 F
1 F R(SENSE)
ILIM1/2
R_(LIM)
V_CC
1 F
EN1/2
GND
ERR
MCU I/O
MCU I/O
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.