Blog de la compañía Mingjiada Supply TI TPS7B4253 300mA, 40V Automotive Adjustable Voltage-Tracking Low-Dropout Voltage Regulator

Mingjiada Supply TI TPS7B4253 300mA, 40V Automotive Adjustable Voltage-Tracking Low-Dropout Voltage Regulator

As automotive electronic systems place ever-increasing demands on the precision and reliability of power management, Texas Instruments’ (TI) TPS7B4253 low-dropout regulator has become the ideal choice for automotive sensor power supply and ECU auxiliary power supply designs, thanks to its high input voltage rating of 40 V, 300 mA output capability and unique voltage-tracking function. Mingjiada Electronics is a long-standing supplier of the [TI] TPS7B4253 automotive adjustable voltage-tracking low-dropout regulator, offering both sample procurement and bulk supply.

The TPS7B4253 is a high-voltage, ultra-low-dropout regulator designed specifically for automotive applications. Manufactured using a bipolar process, it offers excellent transient response and load regulation. The device supports a maximum input voltage of 40V and an output current of 300mA, whilst the output voltage can be flexibly adjusted within the range of 2V to 38V via an external resistor divider. Its key highlight is the integrated voltage tracking function—the output voltage can track an external reference voltage (such as a sensor signal or MCU DAC output) in real time, enabling dynamic voltage regulation. This makes it particularly suitable for automotive electronics scenarios requiring proportional scaling or adaptive power supply.

The TPS7B4253 is suitable for automotive applications with 45V load dump. The device can function as a low-dropout (LDO) regulator or a voltage tracker, thereby establishing a closed power loop for off-board sensors with an on-board main power supply. The device’s output is precisely regulated by the reference voltage applied to the ADJ pin.

Supplied by Mingjiada Electronics: TI TPS7B4253 Key Parameters at a Glance
Input voltage range: 4V to 40V (withstands –40V to 45V, supports 45V load dump)
Output voltage range: 1.5 V to 40 V (HTSSOP); 2 V to 40 V (HSOIC PowerPAD™)
Output current capability: 300 mA
Tracking tolerance: ±4 mV (over full temperature range, between ADJ and FB)
Low dropout voltage: 320 mV at 200 mA (typical 350 mV)
Quiescent current (IQ): typically 60 µA at light load; < 4 µA when EN is low
Output capacitance compatibility: stable with ceramic capacitors from 10 µF to 500 µF, with ESR ranging from 1 mΩ to 20 Ω
Functional safety: Functional Safety-Capable
PSRR: 60 dB at 100 kHz

TPS7B4253 Key Features:
Wide input voltage range: –40 V to 45 V (maximum)
Output voltage can be stepped down to: 1.5 V to 40 V (HTSSOP)
2 V to 40 V (HSOIC PowerPAD™)
Output current capability: 300 mA
Extremely low output tracking tolerance: ±4 mV
Low dropout voltage: 320 mV at IOUT = 200 mA
Separate pins for enable and track-input (HTSSOP only)
Low quiescent current (IQ): < 4 µA when EN is low
60 µA (typical) at light load
Extremely wide ESR range:
Stable operation when used with ceramic output capacitors from 10 µF to 500 µF (ESR 1 mΩ to 20 Ω)
Reverse polarity protection
Current limit and thermal shutdown protection
Output short-circuit protection to ground and supply
Inductive clamping on the OUT pin

Typical Applications
The voltage-tracking characteristics of the TPS7B4253 make it particularly well-suited for the following automotive electronic systems:
Sensor power supply: Provides a power rail with a precisely tracked reference voltage for pressure sensors, position sensors, temperature sensors and the like, ensuring the accuracy and consistency of sensor output signals.
ECU auxiliary power supply: Provides a clean, low-voltage power supply for analogue front-end circuits in engine control units (ECUs) and transmission control units (TCUs).
Adaptive lighting systems: Tracks ambient light sensor signals to dynamically adjust LED drive voltages.
Redundant power supply architecture: Rapidly switches to a backup power rail and maintains stable output voltage in the event of a primary power supply failure.

Supply Information
Shenzhen Mingjiada Electronics Co., Ltd. — a long-standing distributor of TI products — maintains a constant stock of the TPS7B4253 series automotive LDO low-dropout regulators (including models such as TPS7B4253QDDARQ1 and TPS7B4253QPWPRQ1), and supports both sample procurement and bulk supply. To confirm specific batch numbers, stock levels and real-time prices, please visit the Mingjiada Electronics website (https://www.integrated-ic.com/) for further supply details.
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