TPS7B4253-Q1_15 Datasheet, PDF (1/31 Pages) Texas Instruments – TPS7B4253-Q1 300-mA 40-V Low-Dropout Voltage-Tracking LDO With 4-mV Tracking Tolerance

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TPS7B4253-Q1
SLVSCP3A – JANUARY 2015 – REVISED AUGUST 2015
TPS7B4253-Q1 300-mA 40-V Low-Dropout Voltage-Tracking LDO With 4-mV Tracking
Tolerance
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 I_OUT = 200
mA
• Separate Pins for Enable and Tracking Inputs
(HTSSOP only)
• Low Quiescent Current (I_Q):
– < 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 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:
– 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)
HTSSOP (20)
4.89 mm × 3.90 mm
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
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.