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LM3485MM/NOPB
+StücklisteIC REG CTRLR BUCK 8VSSOP
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HerstellerTexas Instruments
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Herstellerteil #LM3485MM/NOPB
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Paket VSSOP-8
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Auf Lager4191
365 Tage Qualitätsgarantie
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Spezifikationen
| Attribut | Wert |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Active |
| Output Type | Transistor Driver |
| Function | Step-Down |
| Output Configuration | Positive |
| Topology | Buck |
| Number of Outputs | 1 |
| Output Phases | 1 |
| Voltage - Supply (Vcc/Vdd) | 4.5V ~ 35V |
| Duty Cycle(Max) | 100% |
| Synchronous Rectifier | No |
| Clock Sync | No |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
Übersicht
Description
Key features include a high-speed, constant-on-time (COT) PWM control scheme, which enables fast transient response and simplifies loop stability design. It supports a wide range of switching frequencies, allowing for flexibility in design and efficiency optimization. The LM3485MM/NOPB also includes overcurrent protection, adjustable soft-start, and an enable pin for precise control of the power supply sequence.
This controller is suitable for various applications, including point-of-load power supplies, distributed power systems, and general-purpose step-down converters. Its compact size and versatility make it a popular choice for designers needing reliable and efficient voltage regulation solutions.
Equivalent
1. Linear Technology LT3470 - A step-down regulator with similar functionality.
2. Maxim Integrated MAX16903 - An automotive DC-DC buck controller.
3. ON Semiconductor NCP3063 - A switching regulator suitable for similar applications.
4. Microchip MCP16301 - A high-efficiency buck regulator.
These alternatives may differ in specifications and performance, so it's essential to check compatibility with your application needs.
Features
1. Wide Input Voltage Range: It supports input voltages from 2.97V to 5.5V, making it suitable for various applications.
2. Adjustable Output Voltage: The output voltage can be precisely set using an external resistor divider.
3. High Efficiency: The synchronous rectification ensures high efficiency, ideal for battery-powered devices.
4. Current Mode Architecture: This provides excellent line and load transient response.
5. Adjustable Switching Frequency: The switching frequency can be adjusted, enabling optimization for efficiency or size.
6. Integrated Soft-start: This feature helps in reducing inrush current during startup.
7. Overcurrent Protection: Built-in overcurrent protection ensures component safety and system reliability.
8. Thermal Shutdown: Protects the device from overheating by shutting it down when necessary.
9. Compact Package: Available in a small MSOP-8 package, saving board space.
These features make the LM3485MM/NOPB a robust and efficient choice for power management in a variety of electronic devices.
Pinout
1. VCC: Power supply input for the IC.
2. GND: Ground connection.
3. FB: Feedback input for voltage regulation; connected to the output.
4. COMP: Compensation pin for the error amplifier; used to stabilize the control loop.
5. RCL: Current limit set pin; determines the current limit by setting an appropriate resistor.
6. SW: Switch node connection; connects to the source of the N-channel MOSFET.
7. HGATE: High-side gate drive; controls the gate of the external N-channel MOSFET.
8. SS: Soft-start control; allows the output voltage to ramp up slowly to prevent inrush current.
The LM3485MM/NOPB is typically used in applications requiring efficient power conversion with adjustable output voltage and current limiting features.