Packaging information
| Package | Pins VSSOP (DGS) | 10 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 1,000 | SMALL T&R |
Features for the LM3481-Q1
- AEC-Q100 Qualified for automotive applications:
- Device temperature grade 1: -40°C to +125°C, T A
- 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 soft start
- 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)
- Create a custom design using the LM3481-Q1 with the WEBENCH Power Designer
Description for the LM3481-Q1
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.