Packaging information
| Package | Pins HTSSOP (PWP) | 20 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 2,000 | LARGE T&R |
Features for the TPS7B4253-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 (maximum)
- Output voltage adjusts down to:
- 1.5V to 40V (HTSSOP)
- 2V to 40V (HSOIC PowerPAD™)
- Output Current Capability: 300mA
- Very-low output tracking tolerance, ±4mV
- Low-dropout voltage: 320mV for IOUT = 200mA
- Separate pins for enable and tracking inputs (HTSSOP only)
- Low quiescent current
(IQ):
- < 4µA when EN = low
- 60µA (typical) at light loads
- Extremely wide ESR range:
- Stable With 10µF to 500µF ceramic output capacitor, ESR 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
- Available in the following
packages:
- 8-pin HSOIC PowerPAD
- 20-pin HTSSOP
- For a newer drop-in alternative in the HSOIC package, see the TPS7B4260-Q1 device.
Description for the TPS7B4253-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 TPS7B4253-Q1 is designed for automotive applications with a 45V load dump. The device can be used either as a tracking low-dropout (LDO) regulator or as a voltage tracker to build a 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 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 in a reverse-polarity condition. The TPS7B4253-Q1 also includes thermal shutdown, inductive clamp, overload, and short-to-battery protection to prevent damage to onboard components during extreme conditions.