Packaging information
| Package | Pins VSSOP (DGK) | 8 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 1,000 | SMALL T&R |
Features for the LM3488
- 8-lead VSSOP package
- Internal push-pull driver with 1A peak current capability
- Current limit and thermal shutdown
- Frequency compensation optimized with a capacitor and a resistor
- Internal soft start
- Current mode operation
- Undervoltage lockout with hysteresis
- Key specifications:
- Wide supply voltage range of 2.97V to 40V
- 100kHz to 1MHz adjustable and synchronizable clock frequency
- ±1.5% (overtemperature) internal reference
- 5µA shutdown current (overtemperature)
- Create a custom design using the LM3488 with the WEBENCH® Power Designer
Description for the LM3488
The LM3488 is a versatile low-side N-FET high-performance controller for switching regulators. This device is designed for use in topologies requiring low-side FET, such as boost, flyback, or SEPIC. Moreover, the LM3488 can be operated at extremely high switching frequency to reduce the overall design size. The switching frequency of LM3488 can be adjusted to any value from 100kHz to 1MHz by using a single external resistor or by synchronizing the device to an external clock. Current mode control provides excellent bandwidth and transient response, besides cycle-by-cycle current limiting. Output current can be programmed with a single external resistor.
The LM3488 has built-in features such as thermal shutdown, short-circuit protection, and overvoltage protection. Power-saving shutdown mode reduces the total supply current to 5µA and allows power supply sequencing. Internal soft-start limits the inrush current at start-up.