L6910G

DC DC Switching Controllers Overview

The L6910G is a voltage mode PWM controller designed for high-performance DC-DC buck conversion from 3.3V, 5V, and 12V buses. It features an adjustable output voltage down to 0.9V with a 0.9V ±1.5% reference. The device operates on supply voltages between 5V and 12V, supporting a switching frequency internally set at 200kHz or externally adjustable from 50kHz to 1MHz. It provides up to 1.3A gate current capability and supports 0% to 100% duty cycle operation. Integrated protections include overvoltage crowbar and hiccup-mode overcurrent protection.

DC DC Switching Controllers Feature Summary

• Voltage mode PWM control with very fast load transient response
• Internal crowbar circuit activates low-side MOSFET during overvoltage detection
• Hiccup mode operation discharges soft-start capacitor upon overcurrent detection
• N-inverting error amplifier input available for flexible feedback configuration

DC DC Switching Controllers Applications

• CPU power supply systems
• High performance DC-DC conversion from standard bus voltages
• Systems requiring fast load transient response

DC DC Switching Controllers Procurement Notes

Verify component status as the L6910 series is listed as obsolete in multiple distributor records. Confirm availability of the specific G suffix variant through authorized channels. Ensure design-in compliance with RoHS directives by checking detailed certification documents. Validate that the SOIC-16 package matches the target PCB footprint requirements before finalizing procurement plans.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring robust overvoltage and overcurrent protection mechanisms. The internal crowbar feature offers distinct safety advantages compared to standard shutdown methods. Consider the external frequency adjustment range if synchronization with other system clocks is necessary. Ensure the external power section can handle the peak currents driven by the high-capability gate drivers.

DC DC Switching Controllers Part Context

The L6910 belongs to STMicroelectronics' legacy power management portfolio, specifically categorized under switching controllers. It serves as a dedicated PWM controller rather than an integrated switch regulator, requiring external MOSFETs. This architecture allows for customization of the power stage while maintaining precise voltage regulation through the internal error amplifier and oscillator circuits.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The L6910 series is marked as obsolete. Designers should consult official manufacturer obsolescence notices for potential end-of-life alternatives or contact STMicroelectronics directly for recommended replacement components.