S-8337ACCA-T8T1G

Overview

The S-8337ACCA-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 pulse width modulation (PWM) control. The device supports an internal oscillation frequency adjustable up to 1.134 MHz via an external resistor on the ROSC pin. Maximum duty ratio is configurable through the RDuty pin. It features under-voltage lockout and timer latch short-circuit protection. The component is housed in an 8-TSSOP package with dimensions of 0.173 inches (4.40 mm) wide.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Supports low-voltage operation starting at 1.8 V, suitable for portable systems.
• Includes built-in under-voltage lockout and timer latch short-circuit protection circuits.

Applications

• Power supply for LCD panels
• Portable electronic systems operating on low voltage
• DC-DC boost converter designs

Procurement Notes

Verify the specific suffix 'ACCA' against official ABLIC documentation to confirm exact electrical tolerances and factory settings, as these vary across the S-8337 family. Confirm availability status directly with authorized distributors, as this part may be marked not recommended for new designs or subject to minimum order quantities. Ensure compliance with RoHS3 specifications during procurement.

Selection Notes

Select this controller when designing boost converters requiring adjustable switching frequencies up to 1.134 MHz and customizable maximum duty ratios. It is appropriate for applications needing operation from a 1.8 V input source. Consider the 8-TSSOP package constraints and thermal requirements. Verify that the external component values for the ROSC and RDuty pins align with the desired operational parameters defined in the datasheet.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8337 variant specifically allows user adjustment of the maximum duty ratio, distinguishing it from the fixed-duty S-8338 series. Both series share core architectures including UVLO and short-circuit protection, targeting low-voltage portable power management needs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-reference with other S-8337 variants only if functional parameters match exactly.