TPS7B770X-Q1中文资料德州仪器数据手册PDF规格书

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-V to 40-V Wide Input Voltage Range, 45-V

Load Dump

• Power Switch Mode When Tying FB to GND

• 1.5-V 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 Max Dropout Voltage at 100-mA Load

• Stable With Output Capacitor in 2.2-μF to 100-μF

Range (ESR 1 mΩ to 5 Ω)

• Integrated Protection and Diagnostics

– Thermal Shutdown

– Undervoltage Lockout (UVLO)

– 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 Supplies

• Surround-View Camera Power Supplies

• High-Side Power Switch For Small-Current

Applications

3 Description

The TPS7B770x-Q1 family of devices feature a single

and dual, high-voltage low-dropout regulator (LDO)

with current sensing, designed to operate with a wide

input-voltage range from 4.5 V to 40 V (45-V load

dump protection). These devices provide 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 V to 20 V.

These devices provide 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

analog-to-digital converter (ADC) resources. Each

channel also implements adjustable current limit with

an external resistor.

An integrated reverse polarity diode eliminates the

need for an external diode. These devices feature

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.

These devices operate over a –40°C to +125°C

ambient temperature range.