LM3481MMX/NOPB
Active2.97V TO 48V HIGH-EFFICIENCY CONTROLLER FOR BOOST, SEPIC AND FLYBACK
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LM3481MMX/NOPB
Active2.97V TO 48V HIGH-EFFICIENCY CONTROLLER FOR BOOST, SEPIC AND FLYBACK
Technical Specifications
Parameters and characteristics for this part
| Specification | LM3481MMX/NOPB |
|---|---|
| Clock Sync | True |
| Control Features | Soft Start, Ramp, Enable, Frequency Control |
| Frequency - Switching [Max] | 1 MHz |
| Frequency - Switching [Min] | 100 kHz |
| Function | Step-Up, Step-Up/Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 10-MSOP, 10-TFSOP |
| Package / Case [x] | 3 mm |
| Package / Case [x] | 0.118 in |
| Supplier Device Package | 10-VSSOP |
| Synchronous Rectifier | False |
| Topology | Flyback, SEPIC, Boost |
| Voltage - Supply (Vcc/Vdd) [Max] | 48 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 2.97 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 2.69 | |
| 10 | $ 2.41 | |||
| 25 | $ 2.28 | |||
| 100 | $ 1.94 | |||
| 250 | $ 1.82 | |||
| 500 | $ 1.59 | |||
| 1000 | $ 1.32 | |||
| Digi-ReelÛ | 1 | $ 2.69 | ||
| 10 | $ 2.41 | |||
| 25 | $ 2.28 | |||
| 100 | $ 1.94 | |||
| 250 | $ 1.82 | |||
| 500 | $ 1.59 | |||
| 1000 | $ 1.32 | |||
| Tape & Reel (TR) | 3500 | $ 1.23 | ||
| 7000 | $ 1.18 | |||
| Texas Instruments | LARGE T&R | 1 | $ 2.02 | |
| 100 | $ 1.67 | |||
| 250 | $ 1.20 | |||
| 1000 | $ 0.90 | |||
Description
General part information
LM3481-Q1 Series
The LM3481-Q1 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-Q1 device can be operated at very high switching frequencies to reduce the overall solution size. The switching frequency of the LM3481-Q1 device can be adjusted to any value between 100 kHz and 1 MHz 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-Q1 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.
The LM3481-Q1 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-Q1 device can be operated at very high switching frequencies to reduce the overall solution size. The switching frequency of the LM3481-Q1 device can be adjusted to any value between 100 kHz and 1 MHz 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.
Documents
Technical documentation and resources
