TPS7B4253-Q1 IC Chip

TPS7B4253-Q1 (300-mA 40-V Low-Dropout Voltage-Tracking LDO With 4-mV Tracking Tolerance)

Introduction

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.

Features

• Qualified for Automotive Applications
• AEC-Q100 Qualfied With the Following Results
  — Device Temperature Grade 1: -40°C to +125°C Ambient Operating Temperature Range
  — 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 lout = 200mA
• Separate Pins for Enable and Tracking Inputs(HTSSOP only)
• Low Quiescent Current (lQ):
  — <4μA 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 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 SO PowerPAD Package
  — 20-Pin HTSSOP Package

Appearance