Overview
The TLE7368-3E, part of the TLE7368 series, is a multifunctional power supply circuit designed specifically for automotive powertrain systems. It is optimized to supply and monitor next-generation 32-bit microcontroller families, particularly those requiring voltage levels such as 5 V, 3.3 V, or 1.3 V. This device is built on Infineon’s Power technology SPT™, which integrates bipolar, CMOS, and power DMOS circuitry on a single monolithic chip. The TLE7368-3E is ideal for applications in transmission, engine management systems (EMS), and safety systems like electronic power steering (EPS).
Key Specifications
| Specification | Value |
|---|---|
| Battery Input Voltage Range | 4.5 V to 45 V |
| Operating Temperature Range | -40°C to +150°C |
| Pre-regulator (Buck Converter) | 5.5 V / 2.5 A |
| Post-regulators (LDO1) | 5 V ±2%, 800 mA current limit |
| Post-regulators (LDO2) | 3.3 V ±2% or 2.6 V ±2% (selectable), 700 mA current limit |
| Core Supply (LDO3) | 1.5 V, 1.2 V, or 1.3 V ±2% with external NPN power stage |
| Tracking Regulators | 2 regulators following the main 5 V, 105 mA and 50 mA |
| Stand-by Regulator | Linear voltage regulator, hardware selectable output voltages as 1.0 V or 2.6 V, 30 mA |
| Package Options | Low Rthja Power-P-DSO-36; small exposed pad PG-DSO-36 |
| AEC Qualification | AEC Qualified |
| RoHS Compliance | Yes (for PG-DSO-36 package) |
Key Features
- High efficient next generation microcontroller power supply system
- Wide battery input voltage range from 4.5 V to 45 V
- Operating temperature range from -40°C to +150°C
- Integrated current mode Buck converter delivering 5.5 V / 2.5 A
- Post-regulators for system and controller I/O supply: LDO1 (5 V ±2%, 800 mA) and LDO2 (3.3 V or 2.6 V ±2%, 700 mA)
- Integrated linear regulator control circuit for controller cores with external NPN power stage
- Two tracking regulators following the main 5 V output, capable of driving loads of 50 mA and 105 mA
- Stand-by regulator with hardware selectable output voltages (1.0 V or 2.6 V, 30 mA) and independent battery input
- Undervoltage detection circuits with adjustable reset delay time and undervoltage monitoring on stand-by supply
- Window watchdog circuit and overcurrent protection on all regulators
- Power sequencing on controller supplies and overtemperature shutdown
Applications
- Automotive powertrain systems: Transmission, Engine Management Systems (EMS)
- Safety systems: Electronic Power Steering (EPS)
- High efficiency for complex supply systems
- Low current consumption in stand-by mode for extended battery lifetime
- Easy realization of multiple supply rail systems
- Monitoring and control of microcontrollers by reset generator and window-watchdog
Q & A
- What is the input voltage range of the TLE7368-3E?
The input voltage range is from 4.5 V to 45 V.
- What are the output voltages provided by the post-regulators?
The post-regulators provide 5 V ±2% and 3.3 V or 2.6 V ±2% (selectable).
- What is the purpose of the tracking regulators?
The tracking regulators follow the main 5 V output and are capable of driving loads of 50 mA and 105 mA.
- How does the stand-by regulator operate?
The stand-by regulator operates with hardware selectable output voltages (1.0 V or 2.6 V, 30 mA) and has an independent battery input.
- What safety features does the TLE7368-3E include?
The device includes undervoltage detection circuits, window watchdog circuit, overcurrent protection, and overtemperature shutdown.
- What are the package options for the TLE7368-3E?
The package options include Low Rthja Power-P-DSO-36 and small exposed pad PG-DSO-36.
- Is the TLE7368-3E AEC qualified and RoHS compliant?
Yes, the TLE7368-3E is AEC qualified and the PG-DSO-36 package is RoHS compliant.
- What is the operating temperature range of the TLE7368-3E?
The operating temperature range is from -40°C to +150°C.
- How does the power sequencing function work?
The power sequencing function provides a controlled power up sequence of the three output voltages.
- What are the benefits of using the TLE7368-3E in automotive applications?
The benefits include high efficiency, low current consumption in stand-by mode, easy realization of multiple supply rail systems, and monitoring and control of microcontrollers by reset generator and window-watchdog.
