Overview
The LM5176PWPR is a synchronous four-switch buck-boost DC/DC controller produced by Texas Instruments. This device is capable of regulating the output voltage at, above, or below the input voltage, making it highly versatile for various applications. It operates over a wide input voltage range of 4.2 V to 55 V (with an absolute maximum of 60 V), supporting a broad range of use cases. The LM5176 uses current-mode control in both buck and boost modes, ensuring superior load and line regulation.
Key Specifications
| Parameter | Description |
|---|---|
| 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, 100 kHz to 600 kHz |
| 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 Options | HTSSOP-28 and QFN-28 |
| Functional Safety | Functional Safety-Capable |
Key Features
- Single inductor buck-boost controller for step-up/step-down DC/DC conversion
- High efficiency buck-boost transition
- Adjustable switching frequency with optional frequency sync and dithering
- Optional spread spectrum to reduce peak EMI
- Programmable soft-start function
- Power Good and output overvoltage protection
- Optional average input or output current limiting
- Integrated 2-A MOSFET gate drivers
Applications
- Automotive systems, including audio amplifiers and battery backup systems
- Industrial power supplies and converters
- Renewable energy systems, such as solar and wind power
- Telecommunications and networking equipment
- Medical devices requiring high reliability and efficiency
Q & A
- What is the input voltage range of the LM5176PWPR?
The input voltage range is 4.2 V to 55 V, with an absolute maximum of 60 V.
- What is the output voltage range of the LM5176PWPR?
The output voltage range is 0.8 V to 55 V.
- What are the package options for the LM5176PWPR?
The device is available in HTSSOP-28 and QFN-28 packages.
- Does the LM5176PWPR support frequency synchronization?
Yes, the switching frequency can be synchronized to an external clock signal.
- What protection features does the LM5176PWPR offer?
The device includes cycle-by-cycle current limiting, input undervoltage lockout (UVLO), output overvoltage protection (OVP), and thermal shutdown.
- Is the LM5176PWPR suitable for functional safety applications?
Yes, the LM5176PWPR is Functional Safety-Capable).
- How can the switching frequency be adjusted?
The switching frequency is programmable by an external resistor and can range from 100 kHz to 600 kHz).
- Does the LM5176PWPR have integrated MOSFET gate drivers?
Yes, it includes integrated 2-A MOSFET gate drivers).
- What tools are available for designing with the LM5176PWPR?
Tools such as the WEBENCH Power Designer and various evaluation modules are available for custom design and development).
- Are there any reference designs available for the LM5176PWPR?
Yes, several reference designs are available, including those for automotive audio amplifiers, industrial PCs, and high-efficiency power converters).
