Overview
The TPS65320D-Q1, produced by Texas Instruments, is a versatile power management integrated circuit (PMIC) designed for automotive applications. It combines a high-VIN DC-DC step-down converter (buck regulator) with a high-VIN low-dropout (LDO) regulator. The device operates with an input voltage range of 3.6 V to 36 V for the buck regulator and 3 V to 36 V for the LDO regulator, making it suitable for a wide range of automotive power systems.
The buck regulator features an adjustable switch-mode frequency from 100 kHz to 2.5 MHz and includes an integrated high-side MOSFET. The LDO regulator provides up to 280 mA of output current and has a low-input supply current of 45 μA typical in no-load conditions. The device also includes various protection features such as overcurrent protection, overtemperature protection, and undervoltage-lockout (UVLO).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range (Buck Regulator) | 3.6 to 36 | V |
| Input Voltage Range (LDO Regulator) | 3 to 36 | V |
| Output Voltage Range (Buck Regulator) | 0.8 to 20 | V |
| Output Current (Buck Regulator) | Up to 3.2 A | A |
| Output Voltage Range (LDO Regulator) | 1.1 to 5.5 | V |
| Output Current (LDO Regulator) | Up to 280 mA | A |
| Switching Frequency Range | 100 kHz to 2.5 MHz | |
| Package Type | 14-Pin HTSSOP with PowerPAD | |
| Operating Junction Temperature Range | -40 to 150 | °C |
Key Features
- Qualified for automotive applications
- Adjustable switch-mode frequency from 100 kHz to 2.5 MHz for the buck regulator
- Integrated high-side MOSFET for the buck regulator
- Low-dropout (LDO) regulator with up to 280 mA output current
- Low-input supply current of 45 μA typical in no-load conditions for the LDO regulator
- Overcurrent protection and overtemperature protection for both regulators
- Undervoltage-lockout (UVLO) function
- Pulse-skip Eco-mode™ to improve efficiency at light loads
- Soft-start and current-limit features
- Low-ripple pulse-skip mode to reduce no-load input-supply current
- Integrated boot regulator and bootstrap capacitor for the buck regulator
Applications
- Automotive infotainment and cluster systems
- Advanced Driver Assistance System (ADAS)
- Automotive telematics and eCall systems
Q & A
- What is the input voltage range for the TPS65320D-Q1 buck regulator?
The input voltage range for the buck regulator is 3.6 V to 36 V.
- What is the output current capability of the LDO regulator?
The LDO regulator can provide up to 280 mA of output current.
- What is the switching frequency range of the buck regulator?
The switching frequency range is from 100 kHz to 2.5 MHz.
- Does the TPS65320D-Q1 have built-in protection features?
- What is the purpose of the pulse-skip Eco-mode™ in the buck regulator?
The pulse-skip Eco-mode™ improves efficiency at light loads by reducing switching and gate-drive losses.
- How does the soft-start feature work in the TPS65320D-Q1?
The soft-start feature regulates the output voltage by referencing the lower of either the internal voltage reference or the SS pin voltage, using a capacitor on the SS pin to implement a soft-start time.
- What is the package type of the TPS65320D-Q1?
The device is packaged in a 14-Pin HTSSOP with PowerPAD.
- What are the typical applications of the TPS65320D-Q1?
Typical applications include automotive infotainment and cluster systems, ADAS, and automotive telematics and eCall systems.
- How does the LDO regulator auto-source its input supply?
The LDO regulator auto-sources its input supply from the output of the buck regulator when it is in operation.
- What is the operating junction temperature range of the TPS65320D-Q1?
The operating junction temperature range is -40°C to 150°C.
