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LM34936RHFR
+Nomenclature.5-55VIN 4 SWITCH BUCK-BOOST CON
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FabricantTexas Instruments
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Pièce fabricant #LM34936RHFR
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Package VQFN-28
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En stock3780
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Spécifications
| Attribut | Valeur |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| ProductStatus | Active |
| OutputType | Transistor Driver |
| Function | Step-Up/Step-Down |
| OutputConfiguration | Positive |
| Topology | Buck-Boost |
| NumberofOutputs | 1 |
| OutputPhases | 1 |
| Voltage-Supply(Vcc/Vdd) | 4.2V ~ 30V |
| Frequency-Switching | 100kHz ~ 600kHz |
| DutyCycle(Max) | 100% |
| SynchronousRectifier | Yes |
| ClockSync | Yes |
| ControlFeatures | Current Limit, Enable, Frequency Control, Power Good, Soft Start |
| OperatingTemperature | -40°C ~ 125°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | 28-VFQFN Exposed Pad |
Présentation
Description
The LM34936RHFR features include programmable switching frequency, synchronization capability, and various protection features like overvoltage, undervoltage, and overcurrent protection. It also comes with soft-start functionality to minimize inrush currents and ensure a smooth start-up process. The device is highly efficient due to its synchronous rectification capability and can be used in a variety of applications, including industrial, automotive, and portable electronics.
Packaged in a thermally enhanced VQFN package, it is well-suited for space-constrained designs, providing robust performance and reliability under a wide range of operating conditions.
Equivalent
1. LTC7801 by Analog Devices
2. TPS548A28 by Texas Instruments
3. MP2955 by Monolithic Power Systems
4. ISL85410 by Renesas
These alternatives offer similar functionalities such as high efficiency, wide input voltage range, and synchronous rectification. Always check the datasheets to ensure compatibility with specific application requirements.
Features
1. Wide Input Voltage Range: It supports a broad input voltage range, typically suitable for automotive and industrial applications.
2. Four-Switch Architecture: The four-switch buck-boost topology allows for efficient voltage regulation, enabling seamless transitions between buck and boost modes.
3. Synchronous Operation: This improves efficiency by reducing diode losses, particularly beneficial at higher load currents.
4. Integrated Gate Drivers: These facilitate the direct driving of external MOSFETs, which is essential for controlling power flow through the device.
5. Programmable Switching Frequency: Offers flexibility in optimizing efficiency versus size of external components.
6. Current Mode Control: Enhances transient response and simplifies loop compensation.
7. Protection Features: Includes over-voltage, under-voltage, over-current, and thermal shutdown protections, enhancing reliability and safety.
8. Compact Package: Available in a thermally enhanced package, which is suitable for space-constrained designs.
These features make the LM34936RHFR a robust solution for power management in a variety of applications requiring efficient voltage conversion.
Pinout
The LM34936RHFR is housed in a 20-pin VQFN (Very Thin Quad Flat No-Lead) package. This package type is compact, making it suitable for applications where space is a constraint.
Key functions of the LM34936RHFR include:
- Synchronous rectification for improved efficiency.
- Integrated MOSFET drivers to reduce external component count.
- Adjustable switching frequency to optimize the trade-off between efficiency and size.
- Current mode control for fast transient response and simple loop compensation.
- Built-in protection features such as undervoltage lockout, overcurrent protection, and thermal shutdown to enhance reliability.
These features make the LM34936RHFR an ideal choice for applications like telecommunications, industrial power supplies, and point-of-load regulation in computing systems.