S-8338AAHC-T8T1G

Overview

The S-8338AAHC-T8T1G is a CMOS step-up switching regulator controller from the S-8338 series by ABLIC Inc. It operates within a supply voltage range of 1.8 V to 6 V and supports an internal oscillation frequency 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 utilizes pulse width modulation (PWM) control. It includes an under-voltage lockout circuit and a timer latch short-circuit protection circuit. The component is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates a reference voltage circuit, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Features a timer latch short-circuit protection circuit to enhance system reliability during fault conditions.
• Allows adjustment of phase compensation and gain values through external resistors and capacitors connected to the CC pin.

Applications

• Power supply for LCD displays
• Portable systems operating on low voltage

Procurement Notes

Verify the specific suffix codes against the official datasheet to confirm pin compatibility and electrical characteristics. Ensure the ordering information matches the required package type and environmental compliance standards. Cross-reference the manufacturer's latest product change notifications to confirm material specifications and manufacturing origin details before finalizing procurement.

Selection Notes

Select this component when a low minimum operating voltage of 1.8 V is required for portable applications. Choose the S-8338 variant over the S-8337 if a fixed maximum duty ratio is preferred over adjustable duty cycle control. Consider the external frequency setting capability for optimizing switching noise and efficiency requirements in the target design.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for applications requiring compact power solutions with low input voltage capabilities. The S-8338 sub-series specifically distinguishes itself with a fixed maximum duty ratio, simplifying design calculations compared to the adjustable duty ratio variants in the same family.

Replacement Considerations

S-8338ABEC-T8T1G

FAQ

How is the internal oscillation frequency adjusted?

The internal oscillation frequency can be set up to 1.133 MHz by connecting a resistor to the ROSC pin.

What protection circuits are included in the S-8338AAHC-T8T1G?

The device includes an under-voltage lockout circuit (UVLO) and a timer latch short-circuit protection circuit.