Packaging information
| Package | Pins HSOIC (DDA) | 8 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 2,500 | LARGE T&R |
Features for the TPS7B4254-Q1
- AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, TA
- Device HBM ESD classification level 3A
- Device CDM ESD classification level C6
- Wide input voltage range: –40V to 45V (max)
- Output voltage adjust range: 2V to 40V
- Output current capability: 150mA
- Very low output-tracking tolerance: ±4mV
- Low-dropout voltage: 160mV for IOUT = 100mA
- Low quiescent current
(I(Q)):
- < 4µA when ADJ = low
- 60µA typical at light load
- Extremely wide ESR range:
- 10µF to 500µF ceramic output capacitor
- ESR range from 1mΩ to 20Ω
- Reverse polarity protection
- Current-limit and thermal-shutdown protection
- Output short-circuit-proof to ground and supply
- Inductive clamp at OUT pin
- 8-pin HSOIC PowerPAD™ package with exposed thermal pad
- For a newer drop-in alternative in the HSOIC package, see the TPS7B4258-Q1 device.
Description for the TPS7B4254-Q1
For automotive off-board sensors and low-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 a power supply as consistent as that for onboard components to secure high accuracy of data acquisition.
The TPS7B4254-Q1 is designed for automotive applications with a 45V load dump. The device can either be used as one tracking low-dropout (LDO) regulator or as a 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 4mV ultra-low tracking tolerance between the ADJ and FB pins across temperature. The back-to-back PMOS topology eliminates the need for an external diode under a reverse-polarity condition. The TPS7B4254-Q1 also includes thermal shutdown, inductive clamp, overload, and short-to-battery protection to prevent damage to onboard components during extreme conditions.