S-8338ACIB-T8T1G

Overview

The S-8338ACIB-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 connected to the ROSC pin. The device features a fixed maximum duty ratio of 88% and includes under-voltage lockout (UVLO) and timer latch short-circuit protection circuits.

Feature Summary

• Integrates UVLO and timer latch short-circuit protection for enhanced operational safety
• Supports high-frequency PWM operation with externally adjustable oscillation settings
• Features a fixed maximum duty ratio for simplified circuit design

Applications

• Power supply units for LCD panels
• Portable electronic systems requiring low voltage operation
• Step-up DC-DC converter designs

Procurement Notes

Verify the specific suffix T8T1G corresponds to the TSSOP-8 package and reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation or certified datasheets prior to integration. Ensure component authenticity by sourcing directly from authorized distributors or verified channels to avoid counterfeit risks.

Selection Notes

Select this component when a fixed maximum duty ratio is required rather than user-adjustable limits found in the S-8337 series. It is suitable for applications needing a minimum operating voltage of 1.8 V. Designers must account for the fixed 88% duty ratio limit during output voltage calculations to ensure proper regulation across the full input range.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. While the S-8337 series allows for adjustable maximum duty ratios via external resistors, the S-8338 variant provides a fixed maximum duty ratio. Both series share similar internal architectures including reference voltage circuits, error amplifiers, and oscillator stages.

Replacement Considerations

S-8337ACIB-T8T1G serves as a functional alternative within the same series, offering adjustable maximum duty ratio capabilities instead of the fixed ratio found in the S-8338 model. Substitution requires verification that the adjustable duty cycle aligns with the application's voltage regulation requirements.