S-8338ABBC-T8T1G

Overview

The S-8338ABBC-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. This specific variant features a fixed maximum duty ratio of 88%. Designed for low-voltage portable systems and LCD power supplies, it integrates reference voltage circuits, error amplifiers, under-voltage lockout, and timer latch short-circuit protection.

Feature Summary

• Integrates a timer latch short-circuit protection circuit for enhanced reliability
• Features a fixed maximum duty ratio of 88% for simplified design
• Supports adjustable internal oscillation frequencies up to 1.133 MHz
• Operates with a minimum input voltage as low as 1.8 V

Applications

• Power supply for liquid crystal displays (LCD)
• Portable electronic systems operating on low voltage
• Step-up DC-DC converter designs requiring high-frequency PWM control

Procurement Notes

Verify the exact suffix against official ABLIC documentation to confirm package type and electrical tolerances. Confirm RoHS compliance status through current manufacturer declarations. Ensure ordering quantities align with standard reel packaging requirements specified in the datasheet. Cross-reference the part number with authorized distributors to validate authenticity and availability.

Selection Notes

Select this component when a fixed maximum duty ratio is required rather than an externally adjustable one. Choose the S-8338 series over the S-8337 series if the application does not need variable duty cycle control via the RDuty pin. Consider the TSSOP-8 package for surface-mount applications requiring compact footprints. Verify that the target output voltage and load current requirements are compatible with the controller's drive capabilities.

Part Context

This device belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series shares common architectural features including UVLO and short-circuit protection. The S-8338 variant distinguishes itself by fixing the maximum duty ratio, whereas the S-8337 allows external adjustment. Both series target low-voltage portable applications.

Replacement Considerations

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