S-8337ABFB-T8T1G

Overview

The S-8337ABFB-T8T1G is a CMOS step-up switching regulator controller from the S-8337 series, manufactured by ABLIC Inc. It operates within a supply voltage range of 1.8 V to 6 V and utilizes pulse width modulation (PWM) control. The internal oscillation frequency is adjustable up to 1.133 MHz via an external resistor connected to the ROSC pin. The maximum duty ratio is configurable through an external resistor on the RDuty pin. Phase compensation and gain are adjusted using components connected to the CC pin. The device is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates under voltage lockout circuitry and timer latch short-circuit protection for enhanced operational safety.
• Supports low-voltage operation starting at 1.8 V, suitable for portable systems.
• Allows flexible configuration of switching frequency, maximum duty ratio, and phase compensation via external passive components.

Applications

• Power supply for LCD modules
• Portable electronic systems operating on low voltage

Procurement Notes

Verify the specific suffix ABFB against official datasheets to confirm exact electrical characteristics, as variations exist within the S-8337 family. Confirm the 8-TSSOP package type matches the design requirements. Ensure compliance with RoHS standards if required by the target application environment.

Selection Notes

Select this component when designing boost converter circuits requiring high-frequency PWM control and adjustable duty cycles. It is appropriate for applications needing a wide input voltage range down to 1.8 V. Consider the need for external resistors to set frequency and duty ratio during the schematic design phase.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. The S-8337 variant specifically features externally adjustable maximum duty ratios, distinguishing it from the fixed-duty S-8338 series. Both share similar core architectures including reference voltage circuits and error amplifiers.

Replacement Considerations

The S-8338ABFB-T8T1G serves as a functional substitute within the same series, though it features a fixed maximum duty ratio rather than the adjustable configuration found in the S-8337 series. Verify compatibility regarding duty cycle requirements before substitution.