S-8338ACFB-T8T1G

Overview

The S-8338ACFB-T8T1G is a CMOS step-up switching regulator controller from the S-8338 series, manufactured by ABLIC Inc. It operates within an input 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 on the ROSC pin. The maximum duty ratio is fixed at 88%. The device incorporates under-voltage lockout (UVLO) and timer latch short-circuit protection circuits. It is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Features low minimum operating voltage suitable for portable systems and LCD power supplies.
• Includes built-in under-voltage lockout and timer latch short-circuit protection for enhanced reliability.

Applications

• Power supply for LCD panels
• Portable electronic systems requiring low voltage operation
• General purpose DC-DC step-up converter designs

Procurement Notes

Verify the specific suffix 'CFB' against the official ABLIC datasheet to confirm exact electrical tolerances and pin configuration, as suffixes often denote specific output stages or thermal ratings. Ensure the ordering quantity aligns with the manufacturer's standard reel packaging requirements. Confirm RoHS compliance status through the latest product change notification documents provided by ABLIC Inc. prior to final procurement.

Selection Notes

Select this component when designing boost converters requiring a wide input voltage range down to 1.8 V. The fixed 88% maximum duty ratio simplifies compensation network design compared to variable duty ratio variants. Consider the 1.2 MHz high-frequency capability for minimizing passive component size. Verify that the required output current does not exceed the controller's drive capabilities and that the external MOSFET selection matches the switching speed.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8338 series is distinguished by a fixed maximum duty ratio, whereas the S-8337 series allows for adjustable duty ratios via an external resistor. Both series share similar core architectures including UVLO and short-circuit protection, targeting low-voltage portable applications.

Replacement Considerations

S-8338ABEC-T8T1G: Similar S-8338 series controller with TSSOP-8 package. Verify if the specific 'CFB' suffix parameters match the 'BEC' variant requirements. S-8338ACCB-T8T1G: Another S-8338 variant; check electrical specifications and suffix definitions for interchangeability.