Overview
The LM5176-Q1, produced by Texas Instruments, is a synchronous four-switch buck-boost DC/DC controller designed to regulate output voltage at, above, or below the input voltage. This controller is AEC-Q100 qualified, making it suitable for automotive applications, and operates over a wide input voltage range of 4.2 V to 55 V (60 V absolute maximum). It features current-mode control in both buck and boost modes, ensuring superior load and line regulation.
Key Specifications
| Parameter | Specification |
|---|---|
| Input Voltage Range | 4.2 V to 55 V (60 V absolute maximum) |
| Output Voltage Range | 0.8 V to 55 V |
| Switching Frequency | Programmable by external resistor, synchronizable to external clock |
| MOSFET Gate Drivers | Integrated 2-A MOSFET gate drivers |
| Current Limiting | Cycle-by-cycle current limit and optional hiccup mode |
| Protection Features | Input undervoltage lockout (UVLO), output overvoltage protection (OVP), thermal shutdown |
| Package | HTSSOP-28 |
| Temperature Range | -40°C to 125°C |
| Qualification | AEC-Q100 qualified for automotive applications, Functional Safety-Capable |
Key Features
- Single inductor buck-boost controller for step-up/step-down DC/DC conversion
- High efficiency buck-boost transition
- Optional frequency sync and dithering
- Programmable soft-start function
- Optional average input or output current limiting
- Optional spread spectrum to reduce peak EMI
- Power good and output overvoltage protection
- VOUT short protection
Applications
The LM5176-Q1 is designed for a variety of applications, particularly in the automotive sector due to its AEC-Q100 qualification. It is suitable for systems requiring step-up or step-down DC/DC conversion, such as:
- Automotive power systems
- Industrial power supplies
- Renewable energy systems
- Bidirectional TEC drivers
Q & A
- What is the input voltage range of the LM5176-Q1?
The input voltage range is 4.2 V to 55 V (60 V absolute maximum).
- What is the output voltage range of the LM5176-Q1?
The output voltage range is 0.8 V to 55 V.
- Is the LM5176-Q1 AEC-Q100 qualified?
Yes, the LM5176-Q1 is AEC-Q100 qualified for automotive applications.
- What type of control does the LM5176-Q1 employ?
The LM5176-Q1 employs current-mode control in both buck and boost modes.
- What protection features does the LM5176-Q1 offer?
The LM5176-Q1 offers protection features including input undervoltage lockout (UVLO), output overvoltage protection (OVP), thermal shutdown, and cycle-by-cycle current limiting.
- Can the switching frequency of the LM5176-Q1 be synchronized?
Yes, the switching frequency can be programmed by an external resistor and synchronized to an external clock signal.
- What is the package type of the LM5176-Q1?
The LM5176-Q1 is available in an HTSSOP-28 package.
- Is the LM5176-Q1 functional safety-capable?
Yes, the LM5176-Q1 is functional safety-capable.
- What is the temperature range of the LM5176-Q1?
The temperature range is -40°C to 125°C.
- Does the LM5176-Q1 support bidirectional TEC drivers?
Yes, the LM5176-Q1 can be used in bidirectional TEC driver designs.
