S-8338ACCA-T8T1G

Overview

The S-8338ACCA-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 utilizes pulse width modulation (PWM) control. The internal oscillation frequency is adjustable up to 1.133 MHz via an external resistor on the ROSC pin. The device features a fixed maximum duty ratio of 88% and includes under-voltage lockout (UVLO) and timer latch short-circuit protection circuits. It is 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 adjustable internal oscillation frequency up to 1.133 MHz via external components.
• Includes under-voltage lockout (UVLO) circuit to ensure stable operation at low input voltages.

Applications

• Power supply for LCD displays
• Portable systems operating on low voltage
• Battery-powered devices requiring step-up conversion

Procurement Notes

Verify the specific suffix 'ACCA' against the official ABLIC datasheet to confirm the exact output configuration and tolerance specifications. Ensure the ordering part number matches the required package type and tape-and-reel quantity. Confirm RoHS compliance status through the manufacturer's latest environmental declaration before procurement.

Selection Notes

Select this component when a fixed maximum duty ratio is acceptable for the boost application. The S-8338 series differs from the S-8337 series by having a fixed duty ratio rather than an externally adjustable one. Verify that the required switching frequency can be achieved with the available external resistor values connected to the ROSC pin.

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 applications, distinguishing itself with a minimum operating voltage of 1.8 V. The S-8338 variant specifically provides a fixed maximum duty ratio, simplifying design compared to the adjustable duty ratio options in the S-8337 series.

Replacement Considerations

The S-8337 series serves as a functional alternative if adjustable maximum duty ratio is required. Verify pin compatibility and electrical parameters such as input voltage range and switching frequency capabilities before substituting.