S-8338ABCB-T8T1G

Overview

The S-8338ABCB-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 maximum duty ratio is fixed at 88%. The device features under-voltage lockout (UVLO) and timer latch short-circuit protection, packaged in an 8-TSSOP configuration.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Includes under-voltage lockout circuitry to ensure stable operation during low input conditions.
• Features timer latch short-circuit protection to safeguard against output faults.

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 codes against the official ABLIC datasheet to confirm package type and electrical tolerances. Ensure compatibility with the required switching frequency settings and duty cycle constraints. Confirm RoHS compliance status through manufacturer documentation prior to integration into production environments.

Selection Notes

Select this component when a fixed maximum duty ratio of 88% is acceptable for the boost application. Choose based on the need for high-frequency operation up to 1.133 MHz to minimize passive component size. Consider the 1.8 V minimum operating voltage requirement for battery-powered or low-voltage source applications.

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 adjustment via an external resistor. Both share similar core architectures and protection features.

Replacement Considerations

The S-8337ABCB-T8T1G serves as a functional substitute within the same series, offering identical electrical characteristics except for the adjustable maximum duty ratio capability instead of the fixed 88% limit found in the S-8338 model.