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LM3485MMX
+StücklisteIC REG CTRLR BUCK 8VSSOP
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HerstellerTexas Instruments
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Herstellerteil #LM3485MMX
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Paket VSSOP-8
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Auf Lager5987
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Spezifikationen
| Attribut | Wert |
| Package | Tape & Reel (TR) |
| ProductStatus | Obsolete |
| OutputType | Transistor Driver |
| Function | Step-Down |
| OutputConfiguration | Positive |
| Topology | Buck |
| NumberofOutputs | 1 |
| OutputPhases | 1 |
| Voltage-Supply(Vcc/Vdd) | 4.5V ~ 35V |
| DutyCycle(Max) | 100% |
| SynchronousRectifier | No |
| ClockSync | No |
| OperatingTemperature | -40°C ~ 125°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | 8-TSSOP, 8-MSOP (0.118, 3.00mm Width) |
Übersicht
Description
Key features of the LM3485MMX include its ability to handle input voltages ranging from 4.5V to 35V, making it versatile for various systems. It supports a current mode control method which provides fast transient response and simple loop compensation. The device also features a programmable switching frequency, allowing designers to optimize for efficiency or size constraints.
With its integrated N-channel MOSFET driver, the LM3485MMX helps reduce the component count, leading to more compact designs. Protection features include under-voltage lockout, cycle-by-cycle current limit, and thermal shutdown, ensuring robust and reliable operation. The device is commonly used in applications like point-of-load regulation, distributed power systems, and as a general-purpose DC-DC converter.
Equivalent
Features
The LM3485MMX incorporates a voltage-mode control scheme, which provides good transient response and stability. It features an internal error amplifier and allows for pulse frequency modulation (PFM) mode operation to enhance efficiency at light loads. The device includes a soft-start function to limit inrush current during startup, as well as built-in protection mechanisms such as current limit, thermal shutdown, and undervoltage lockout to ensure reliable operation.
Its compact package and efficient performance make the LM3485MMX suitable for various applications, including point-of-load converters, distributed power systems, and other environments where space and efficiency are critical.
Pinout
Here are the pin functions:
1. VCC: Supply voltage input.
2. PGATE: Gate drive output for the external MOSFET.
3. GND: Ground connection.
4. FB (Feedback): Input for the feedback voltage, used for output voltage regulation.
5. COMP: Compensation pin for the control loop.
6. SHDN (Shutdown): Input to enable or disable the controller.
7. ILIM: Current limit setting input.
8. SW/Bootstrap: Connection for the switching node, used to drive the external MOSFET and provide a bootstrap connection.
The LM3485MMX is designed to drive an external N-channel MOSFET and achieve high efficiency in step-down (buck) converter applications.
Manufacturer
Application
1. Telecommunications Equipment: For efficient power conversion and regulation in telecom systems.
2. Industrial Systems: Used in automation and control systems for stable power supply.
3. Consumer Electronics: Powers devices like set-top boxes, LCD displays, and other household electronics.
4. Computing Systems: Supports power management in computer peripherals and networking equipment.
5. Automotive Electronics: Provides power regulation for various automotive electronic subsystems.
The device is valued for its high efficiency, flexibility, and reliability across a wide input voltage range.