S-8337ABHA-T8T1G

Overview

The S-8337ABHA-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 1.8 V to 6 V and utilizes PWM control with an internal oscillation frequency adjustable up to 1.133 MHz via an external resistor on the ROSC pin. The device features a maximum duty ratio controllable through the RDuty pin and includes phase compensation adjustments via the CC pin. Packaged in an 8-TSSOP format, it integrates reference voltage, error amplifier, UVLO, and timer latch short-circuit protection circuits for stable operation.

Feature Summary

• Integrates under voltage lockout (UVLO) and timer latch short-circuit protection circuits
• Allows external adjustment of maximum PWM duty ratio via the RDuty pin
• Supports phase compensation and gain value tuning using external components on the CC pin

Applications

• Power supply for LCD modules
• Portable systems operating on low voltage sources

Procurement Notes

Verify the specific suffix T8T1G corresponds to the 8-TSSOP package and reel packaging configuration. Confirm RoHS compliance status and REACH registration details against the latest manufacturer documentation. Ensure design-in compatibility with the specified 1.8 V minimum operating voltage and check for any product change notifications affecting material composition or manufacturing location.

Selection Notes

Select this component when designing boost converter applications requiring adjustable switching frequencies up to 1.133 MHz. The S-8337ABHA variant allows duty cycle customization via the RDuty pin, unlike fixed-duty counterparts. Ensure external passive components are selected to support the required phase compensation network connected to the CC pin for optimal transient response and stability.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. The S-8337 family distinguishes itself by offering user-adjustable maximum duty ratios, whereas the S-8338 series fixes this parameter at 88%. Both series share the same core architecture designed for low-voltage portable applications, utilizing CMOS technology to minimize power consumption while maintaining high-frequency operation capabilities.

Replacement Considerations

The S-8337AAEB-T8T1G serves as a direct functional substitute within the same series, sharing identical topology and control mechanisms. Verify that the replacement part maintains the same TSSOP-8 footprint and electrical characteristics regarding the 1.8 V to 6 V operating range.