LM3481MM Part Information

Details for LM3481MM by Texas Instruments

Electronic & Electrical Components>Semiconductors - ICs>Power Management

Part Description

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 lowside 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.

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Part Features

  • 10-Lead VSSOP Package
  • Adjustable Undervoltage Lockout With Hysteresis
  • Current Limit and Thermal Shutdown
  • Current Mode Operation
  • Frequency Compensation Optimized With a Capacitor and a Resistor
  • Internal Push-Pull Driver With 1-A Peak Current Capability
  • Internal Softstart
  • Key Specifications
  • LM3481QMM are Automotive-Grade Products That are AEC-Q100 Grade 1 Qualified (u201340u00b0C to +125u00b0C Operating Junction Temperature)
  • Pulse Skipping at Light Loads

Part Specifications

Supply Voltage Min 2.97V
Supply Voltage Max 48V
No. of Outputs 1 Output, 1Outputs
Duty Cycle (%) 85%
Controller IC Case Style VSSOP
No. of Pins 10Pins
Switching Frequency 1MHz
Topology Boost Flyback SEPIC
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL -
SVHC No SVHC (27-Jun-2018)
Output Current 1A
Primary Input Voltage 48V
RoHS Compliant

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