S-8337AACC-T8T1G

Overview

The S-8337AACC-T8T1G is a CMOS step-up switching regulator controller from ABLIC Inc., designed for low-voltage portable systems. It operates within a supply voltage range of 1.8 V to 6 V and supports an internal oscillation frequency up to 1.134 MHz, adjustable via an external resistor on the ROSC pin. The device utilizes pulse width modulation (PWM) control with a maximum duty ratio of 0.89, configurable through the RDuty pin. It features under-voltage lockout (UVLO) and timer latch short-circuit protection. The component is housed in an 8-TSSOP package and functions as a positive output boost DC-DC switching controller.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation
• Supports adjustable internal oscillation frequency up to 1.134 MHz via external resistor
• Includes under-voltage lockout and timer latch short-circuit protection circuits
• Allows configuration of maximum PWM duty ratio through external resistor connection

Applications

• Power supply for LCD displays
• Portable electronic systems operating on low voltage
• Boost DC-DC conversion in battery-powered devices

Procurement Notes

Verify the specific suffix codes against official datasheets to confirm exact electrical characteristics and packaging details. Confirm RoHS compliance status and REACH registration requirements prior to integration. Ensure compatibility with the intended PCB footprint and soldering profile for the TSSOP-8 package. Check for obsolescence notices or design-in restrictions from the manufacturer before finalizing procurement plans.

Selection Notes

Select this controller when designing high-frequency step-up converters requiring adjustable switching frequencies and duty cycles. It is suitable for applications needing operation down to 1.8 V input voltage. Consider the external component requirements for setting frequency and compensation parameters. Evaluate thermal performance and package constraints for surface-mount assembly in compact portable designs.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is characterized by its CMOS technology and ability to operate at low voltages, making it distinct from fixed-frequency or non-adjustable counterparts. It serves as a core power management IC for boosting voltage levels in space-constrained mobile electronics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.