S-8337AAEB-T8T1G

Overview

The S-8337AAEB-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 supports an internal oscillation frequency up to 1.133 MHz via an external resistor on the ROSC pin. The device features adjustable maximum duty ratio through the RDuty pin and configurable phase compensation via the CC pin. It includes under-voltage lockout (UVLO) and timer latch short-circuit protection. Packaged in an 8-TSSOP case, it functions as a boost DC-DC switching controller with current limit, enable, and frequency control characteristics.

Feature Summary

• Integrates under-voltage lockout and timer latch short-circuit protection circuits for enhanced operational safety.
• Allows external adjustment of the PWM maximum duty ratio using a single resistor connected to the RDuty pin.
• Enables customization of phase compensation and gain values through external resistors and capacitors on the CC pin.

Applications

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

Procurement Notes

Verify the specific suffix codes against official datasheets to confirm exact electrical parameters and package variations. Confirm RoHS compliance status and manufacturing origin prior to ordering. Ensure compatibility with existing PCB footprint dimensions for the 8-TSSOP package. Check for any recent product change notifications that may affect material composition or performance specifications.

Selection Notes

Select this component when designing boost converter circuits requiring low minimum operating voltage down to 1.8 V. Consider the adjustable frequency and duty ratio capabilities for optimizing efficiency in portable applications. Verify that the required output voltage and current levels align with the controller's drive capabilities and external component selections.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for low-voltage operation, making it suitable for battery-powered systems. The S-8337 variant specifically offers user-adjustable duty ratios, distinguishing it from the fixed-duty S-8338 series.

FAQ

How is the internal oscillation frequency determined?

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

What protection features are included?

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