Texas Instruments TPS65320-Q1

Description

The TPS65320-Q1 device is a combination of a 40-V, 3.2-A, DC-DC step-down converter and a low-dropout (LDO) regulator. The DC-DC step-down converter, referred to as the buck regulator, has an integrated high-side MOSFET. The LDO regulator also has an integrated MOSFET and a low-input supply current of 28-µA (typical) in a no-load condition. Furthermore, the LDO regulator has an active-low, push-pull reset output pin. To reduce heat, the input supply of the LDO regulator can auto-source from the input voltage to the output of the buck regulator. The low-voltage tracking feature can eliminate the need to use a boost converter during cold-crank conditions.

The buck regulator has a switching frequency range from 100 kHz to 2.5 MHz that provides a flexible design to fix system requirements. The external loop compensation allows for optimization of the converter response for the appropriate operating conditions. A low-ripple pulse-skip mode reduces the no-load input supply current to less than 140 µA.

The device has built-in protection features such as soft start, current limit, thermal sensing, and shutdown because of excessive power dissipation. Furthermore, the device has an internal undervoltage-lockout (UVLO) function that turns off the device at a too-low supply voltage.

Features

• Qualified for Automotive Applications

• AEC-Q100 Qualified With the Following Results:

  -Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature

• Device HBM ESD Classification Level 2
• Device CDM ESD Classification Level C4B
• One High-VIN Step-Down Converter 3.6- to 40-V Input Range
• 250-mΩ High-Side MOSFET 3.2-A Maximum Load Current, 1.1- to 20-V Output Adjustable
• 100-kHz to 2.5-MHz Adjustable Switch-Mode Frequency
• Less Than 140-µA Operating Quiescent Current
• One Low-Dropout Voltage Regulator (LDO) 280-mA Current Capability With 28-µA (Typical) Operating Quiescent Current in No- Load Condition
• Input Supply Auto-Source to Balance
• Efficiency and Low Standby Current
• Power-Good Output (Push-Pull)
• Low-Dropout Voltage of 300 mV at IOUT = 200 mA (Typical)
• Overcurrent Protection for Both Regulators
• Overtemperature Protection
• 14-Pin HTSSOP Package With PowerPAD™ Package

REMARK:-1)LO3=1uHinputside inductorreferhttp://www.ti.com/lit/ds/symlink/tps65320-q1.pdfpage no.312) L1=2.2uHinputside inductorreferhttp://www.ti.com/lit/an/slva702a/slva702a.pdf

• Qualified for Automotive Applications

• -AEC-Q100 Qualified With the Following Results:

• -Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature

• -Device HBM ESD Classification Level 2

• -Device CDM ESD Classification Level C4B

• -One High-VIN Step-Down Converter 3.6- to 40-V Input Range

• -250-mΩ High-Side MOSFET 3.2-A Maximum Load Current, 1.1- to 20-V Output Adjustable

• -100-kHz to 2.5-MHz Adjustable Switch-Mode Frequency

• -Less Than 140-µA Operating Quiescent Current

• -One Low-Dropout Voltage Regulator (LDO) 280-mA Current Capability With 28-µA (Typical) Operating Quiescent Current in No- Load Condition

• -Input Supply Auto-Source to Balance

• -Efficiency and Low Standby Current

• -Power-Good Output (Push-Pull)

• -Low-Dropout Voltage of 300 mV at IOUT = 200 mA (Typical)

• -Overcurrent Protection for Both Regulators

• -Overtemperature Protection

• -14-Pin HTSSOP Package With PowerPAD™ Package

• REMARK:-1)LO3=1uHinputside inductorreferhttp://www.ti.com/lit/ds/symlink/tps65320-q1.pdfpage no.31

2) L1=2.2uHinputside inductorreferhttp://www.ti.com/lit/an/slva702a/slva702a.pdfpage no.2

Typical applications

• Advanced Driver Assistance System (ADAS)
• Telematics
• Automotive Infotainment and Cluster

More information

• Datasheet
• IC product information