S-8337ACAA-T8T1G

Overview

The S-8337ACAA-T8T1G is a CMOS step-up switching regulator controller from the S-8337 series, manufactured by ABLIC Inc. It operates within a supply voltage range of 1.8V to 6V and features an internal oscillator with a frequency adjustable up to 1.134MHz via an external resistor on the ROSC pin. The device utilizes PWM control with a maximum duty ratio configurable through an external resistor on the RDuty pin. Phase compensation and gain are adjustable using components connected to the CC pin. It includes under-voltage lockout (UVLO) and timer latch short-circuit protection circuits, packaged in an 8-TSSOP format.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Features low minimum operating voltage suitable for portable systems and LCD power supplies.
• Includes built-in under-voltage lockout and timer latch short-circuit protection mechanisms.

Applications

• Power supply for LCD panels
• Portable electronic systems requiring low voltage operation

Procurement Notes

Verify the specific output voltage setting associated with the 'AA' suffix against the official datasheet before procurement, as this variant determines the fixed feedback threshold. Confirm that the 8-TSSOP package aligns with the target PCB footprint requirements. Ensure the design accommodates the necessary external components for frequency and duty cycle adjustment. Check current availability status directly with authorized distributors due to potential supply chain fluctuations.

Selection Notes

Select this component when a low input voltage start-up capability down to 1.8V is required for boost applications. Choose the S-8337ACAA-T8T1G over the S-8338 series if adjustable maximum duty ratio is needed rather than a fixed limit. Consider the external component count for oscillator and compensation settings when evaluating board space constraints compared to integrated solutions.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for CMOS technology to minimize power consumption while maintaining stable operation. The S-8337 variant specifically allows for user-defined maximum duty ratios, distinguishing it from the S-8338 which has a fixed duty ratio limit.

Replacement Considerations

S-8337ABEC-T8T1G

FAQ

How is the oscillation frequency determined?

The internal oscillation frequency is set externally by connecting a resistor to the ROSC pin, allowing frequencies up to approximately 1.134 MHz.

What protection features are included?

The device incorporates an under-voltage lockout (UVLO) circuit and a timer latch short-circuit protection circuit to ensure safe operation under fault conditions.