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TPS7B4253QDDARQ1 Datasheet(PDF) 1 Page - Texas Instruments

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Part # TPS7B4253QDDARQ1
Description  Low-Dropout Voltage-Tracking LDO With 4-mV Tracking Tolerance
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS7B4253QDDARQ1 Datasheet(HTML) 1 Page - Texas Instruments

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DC-DC or LDO
Off-Board
Sensor
IN
ADJ
OUT
GND
TPS7B4253-Q1
VOUT
ADC
MCU
Long Cable
Main Board
Automotive
Battery
C(OUT)
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
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.
TPS7B4253-Q1
SLVSCP3B – JANUARY 2015 – REVISED JANUARY 2016
TPS7B4253-Q1 300-mA 40-V Low-Dropout Voltage-Tracking LDO With 4-mV Tracking
Tolerance
1
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 Level 3A
Device CDM ESD Classification Level C6
–40 to 45-V Wide Input-Voltage Range
(Maximum)
Output Voltage Adjusts Down to:
1.5 to 40 V (HTSSOP)
2 to 40 V (SO PowerPAD™)
300-mA Output Current Capability
Very-Low Output Tracking Tolerance, ±4 mV
320-mV Low Dropout Voltage when IOUT = 200
mA
Separate Pins for Enable and Tracking Inputs
(HTSSOP only)
Low Quiescent Current (IQ):
< 4 µA when EN = LOW
60 µA (Typical) at Light Loads
Extremely Wide ESR Range.
Stable With 10- to 500-µF Ceramic Output
Capacitor, ESR 1 m
Ω to 20 Ω
Reverse Polarity Protection
Current-Limit and Thermal-Shutdown Protection
Output Short-Circuit Proof to Ground and Supply
Inductive Clamp at OUT Pin
Available in the Following Packages:
8-Pin SO PowerPAD Package
20-Pin HTSSOP Package
2 Applications
Off-Board Sensor Supply
High-Precision Voltage Tracking
Power Switch for Off-Board Load
3 Description
For automotive off-board sensors and small current
off-board modules, the power supply is through a
long cable from the main board. In such cases,
protection is required in the power devices for the off-
board loads to prevent the onboard components from
damage during a short to GND or short to battery
caused by a broken cable. Off-board sensors require
consistent power supply as onboard components to
secure high accuracy of data acquisition.
The
TPS7B4253-Q1
device
is
designed
for
automotive applications with a 45-V load dump. The
device can either be used as one tracking low-
dropout (LDO) regulator or voltage tracker to build
one closed power loop for off-board sensors with an
onboard main supply. The output of the device is
accurately regulated by a reference voltage at the
ADJ pin.
To provide an accurate power supply to the off-board
modules, the device offers a 4-mV ultralow tracking
tolerance between the ADJ and FB pins across
temperature.
The
back-to-back
PMOS
topology
eliminates the need for an external diode under
reverse
polarity
condition.
The
TPS7B4253-Q1
device also includes thermal shutdown, inductive
clamp, overload, and short-to-battery protection to
prevent damage to onboard components during
extreme conditions.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS7B4253-Q1
SO PowerPAD (8)
4.89 mm × 3.90 mm
HTSSOP (20)
6.50 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Schematic


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