S-8338AAIB-T8T1G

Overview

The S-8338AAIB-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. The internal oscillation frequency is adjustable up to 1.133 MHz via an external resistor on 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. It is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates PWM control with adjustable high-frequency oscillation for compact power supply designs
• Includes built-in under-voltage lockout and timer latch short-circuit protection for enhanced reliability
• Supports low-voltage operation starting at 1.8 V, suitable for portable systems

Applications

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

Procurement Notes

Verify the specific suffix 'AAIB' against the official ABLIC datasheet to confirm output configuration and pin compatibility. Ensure the ordering quantity aligns with the manufacturer's standard reel packaging requirements. Confirm RoHS compliance status through the latest product change notifications or environmental documents provided by the supplier.

Selection Notes

Select this component when a fixed maximum duty ratio is required rather than an externally adjustable one. It is appropriate for applications needing a wide input voltage range down to 1.8 V. Consider the TSSOP-8 package constraints and the need for external compensation components connected to the CC pin for stability.

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 an external resistor, the S-8338 series fixes this parameter. Both series share similar internal architectures including reference voltage circuits and error amplifiers.

Replacement Considerations

The S-8338ABEC-T8T1G is a documented substitute within the same series offering identical functional characteristics and package type.