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TPS7B4253-Q1_16 Datasheet, PDF (1/32 Pages) Texas Instruments – Low-Dropout Voltage-Tracking LDO With 4-mV Tracking Tolerance | |||
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TPS7B4253-Q1
SLVSCP3B â JANUARY 2015 â REVISED JANUARY 2016
TPS7B4253-Q1 300-mA 40-V Low-Dropout Voltage-Tracking LDO With 4-mV Tracking
Tolerance
1 Features
â¢1 Qualified for Automotive Applications
⢠AEC-Q100 Qualified With the Following Results:
â Device Temperature Grade 1: â40°C to
+125°C Ambient Operating Temperature
Range
â Device HBM ESD Classification Level 3A
â Device CDM ESD Classification Level C6
⢠â40 to 45-V Wide Input-Voltage Range
(Maximum)
⢠Output Voltage Adjusts Down to:
â 1.5 to 40 V (HTSSOP)
â 2 to 40 V (SO PowerPADâ¢)
⢠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):
â < 4 µA when EN = LOW
â 60 µA (Typical) at Light Loads
⢠Extremely Wide ESR Range.
â Stable With 10- to 500-µF Ceramic Output
Capacitor, ESR 1 mΩ 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:
â 8-Pin SO PowerPAD Package
â 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)
HTSSOP (20)
4.89 mm à 3.90 mm
6.50 mm à 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Schematic
Automotive
Battery
DC-DC or LDO
VOUT
Main Board
IN
ADJ TPS7B4253-Q1 OUT
GND
Long Cable
C(OUT)
Off-Board
Sensor
MCU
ADC
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.
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