S-8338ABFA-T8T1G

Overview

The S-8338ABFA-T8T1G is a CMOS step-up switching regulator controller from the S-8338 series by ABLIC Inc. It operates within an input voltage range of 1.8 V to 6 V and utilizes pulse width modulation (PWM) control with a maximum duty ratio fixed at 88%. The internal oscillation frequency is adjustable up to 1.133 MHz via an external resistor on the ROSC pin. Phase compensation and gain are configurable through external components connected to the CC pin. The device includes under-voltage lockout and timer latch short-circuit protection circuits, packaged in an 8-pin TSSOP format.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, PWM controller, UVLO, and short-circuit protection.
• Supports high-frequency operation with adjustable internal oscillation up to 1.133 MHz.
• Features a fixed maximum duty ratio for simplified design implementation.
• Allows adjustment of phase compensation and gain for stability optimization.

Applications

• Power supply for LCD panels
• Portable systems operating on low voltage
• Step-up DC-DC converter designs

Procurement Notes

Verify the specific suffix ABFA against official ABLIC documentation to confirm exact electrical characteristics and availability status. Confirm package type matches project requirements. Check for RoHS compliance and REACH status in current datasheets. Ensure ordering quantities align with manufacturer standard packaging specifications.

Selection Notes

Select this component when a fixed duty ratio boost controller is required. Compare with the S-8337 series if variable maximum duty ratio control via external resistors is necessary. Consider the adjustable frequency range and low minimum operating voltage for battery-powered applications requiring efficient power management.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8338 variant distinguishes itself from the S-8337 series by having a fixed maximum duty ratio, whereas the S-8337 allows duty ratio control via an external resistor. Both share similar core architectures and protection features.

Replacement Considerations

The S-8337ABFA-T8T1G is a related model within the same family but offers variable maximum duty ratio control instead of the fixed ratio found in the S-8338 series. Verify functional compatibility before substitution.