LM3481-Q1 - 用于开关稳压器的 48V 宽输入电压低侧 N 通道控制器

LM3481-Q1是TI德州仪器公司的一款控制器（外部开关）产品，LM3481-Q1是用于开关稳压器的 48V 宽输入电压低侧 N 通道控制器，本站介绍了LM3481-Q1的封装应用图解、特点和优点、功能等，并给出了与LM3481-Q1相关的TI元器件型号供参考。

LM3481-Q1 - 用于开关稳压器的 48V 宽输入电压低侧 N 通道控制器 - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品特性

LM3481QMM are Automotive-Grade Products That are AEC-Q100 Grade 1 Qualified (–40°C to +125°C Operating Junction Temperature)
10-Lead VSSOP Package
Internal Push-Pull Driver With 1-A Peak Current Capability
Current Limit and Thermal Shutdown
Frequency Compensation Optimized With a Capacitor and a Resistor
Internal Softstart
Current Mode Operation
Adjustable Undervoltage Lockout With Hysteresis
Pulse Skipping at Light Loads
Key Specifications
- Wide Supply Voltage Range of 2.97 V to 48 V
- 100-kHz to 1-MHz Adjustable and Synchronizable Clock Frequency
- ±1.5% (Over Temperature) Internal Reference
- 10-µA Shutdown Current (Over Temperature)

产品应用

Automotive Start-Stop Applications
Automotive ADAS Driver Information
One Cell/Two Cell Li-ion Battery Powered Portable Bluetooth Audio Systems
Notebooks, PDAs, Digital Cameras, and Other Portable Applications
Offline Power Supplies
Set-Top Boxes
Boost for Audio Amplifiers

产品说明

The LM3481 device is a versatile Low-Side N-FET high-performance controller for switching regulators. The device is designed for use in Boost, SEPIC and Flyback converters and topologies requiring a low-side FET as the primary switch. The LM3481 device can be operated at very high switching frequencies to reduce the overall solution size. The switching frequency of the LM3481 device can be adjusted to any value between 100kHz and 1MHz by using a single external resistor or by synchronizing it to an external clock. Current mode control provides superior bandwidth and transient response in addition to cycle-by-cycle current limiting. Current limit can be programmed with a single external resistor.

The LM3481 device has built-in protection features such as thermal shutdown, short-circuit protection and overvoltage protection. Power-saving shutdown mode reduces the total supply current to 5 µA and allows power supply sequencing. Internal soft-start limits the inrush current at start-up. Integrated current slope compensation simplifies the design and, if needed for specific applications, can be increased using a single resistor.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
LM3481	VSSOP (10)	3.00 mm × 3.00 mm
LM3481-Q1	VSSOP (10)	3.00 mm × 3.00 mm

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