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LM3481MM
+NomenclatureSwitching Controllers
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FabricantTexas Instruments
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Pièce fabricant #LM3481MM
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En stock27721
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Spécifications
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Présentation
Description
Key features include a wide input voltage range, typically from 2.97V to 40V, enabling it to support various power sources. It offers adjustable output voltage, current mode control for simple loop compensation, and a high switch current limit. The LM3481MM also includes built-in protection features such as cycle-by-cycle current limiting, thermal shutdown, and under-voltage lockout to enhance reliability.
The small footprint of the LM3481MM, often in a compact MSOP-8 or VSSOP-8 package, makes it well-suited for space-constrained applications. Its design facilitates efficient power conversion with minimal external components, making it a popular choice in automotive, industrial, and consumer electronics sectors.
Equivalent
Features
1. Wide Input Voltage Range: It operates from 2.97V to 30V, accommodating various supply voltages.
2. High Efficiency: The controller can achieve high efficiency in power conversion with its low RDS(ON) internal switch.
3. Adjustable Switching Frequency: It allows frequency adjustment from 100kHz to 1MHz, enabling design flexibility and optimization.
4. Current-Mode Control: Provides improved transient response and loop stability.
5. Integrated Features: Includes a high-gain error amplifier, current sensing, and adjustable soft-start to minimize inrush current.
6. Protection Features: Over-temperature and under-voltage lockout protect the device against extreme conditions.
7. Small Package: Available in an 8-pin VSSOP package, it is suited for space-constrained applications.
These features make the LM3481MM well-suited for efficient and flexible power management solutions in a variety of electronic devices.
Pinout
Pin Count:
- The LM3481MM has 8 pins.
Pin Functions:
1. SW (Switch): Connects to the external switching FET; involved in switching control.
2. GND (Ground): System ground.
3. FB (Feedback): Used to adjust the output voltage by connecting to a resistor divider network.
4. COMP (Compensation): Connection for compensation network to stabilize the control loop.
5. ISEN (Current Sense): Monitors current through an external sense resistor for overcurrent protection.
6. RT (Timing Resistor): Sets the oscillator frequency with an external resistor.
7. UVLO (Under-Voltage Lockout): Monitors input voltage for undervoltage conditions.
8. VCC (Supply Voltage): Power supply pin for the controller.
This configuration allows the LM3481MM to control the switching of external components to regulate voltage efficiently.