S-8338ACHC-T8T1G

Overview

The S-8338ACHC-T8T1G is a CMOS step-up switching regulator controller from the S-8338 series by ABLIC Inc. It operates within an input voltage range of 1.8 V to 6 V and supports an internal oscillation frequency adjustable up to 1.133 MHz via an external resistor. The device features a fixed maximum duty ratio of 88% and utilizes pulse-width modulation (PWM) control. It includes built-in under-voltage lockout and timer latch short-circuit protection circuits, housed in an 8-pin TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Features timer latch short-circuit protection circuit for enhanced system safety.
• Supports external adjustment of oscillation frequency and phase compensation components.

Applications

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

Procurement Notes

Verify the specific suffix codes against the official datasheet to ensure correct packaging and temperature ratings. Confirm RoHS compliance status with the manufacturer as specifications may be subject to change notifications. Cross-reference the part number with authorized distributors to validate current availability and lead times before finalizing procurement plans.

Selection Notes

Select this component when designing boost converters requiring a wide input voltage range starting at 1.8 V. The fixed 88% duty ratio distinguishes it from the S-8337 series, which allows variable duty ratio control. Ensure external components match the required oscillation frequency and phase compensation needs for stable operation.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. These devices are designed for applications demanding compact power solutions with low minimum operating voltages. The series integrates essential protection features directly into the CMOS architecture to simplify external circuit design.

Replacement Considerations

The S-8337 series serves as a functional alternative if variable maximum duty ratio control is required instead of the fixed 88% limit found in the S-8338 series. Verify pin compatibility and electrical parameters before substitution.