S-8338ACAC-T8T1G

Overview

The S-8338ACAC-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 external adjustment of phase compensation and gain values via connected resistors and capacitors.

Applications

• Power supply for LCD panels
• Portable systems operating on low voltage

Procurement Notes

Verify the specific suffix ACAC against official datasheets to confirm pinout and electrical characteristics, as variations exist within the S-8338 family. Confirm RoHS compliance status and check for any Product Change Notifications (PCN) regarding material or manufacturing updates before finalizing procurement specifications.

Selection Notes

Select this component when a fixed maximum duty ratio of 88% is required for the boost topology. It is suitable for designs needing an adjustable switching frequency up to 1.133 MHz. Ensure the application requires a minimum operating voltage of 1.8 V and fits within the 6 V maximum input limit.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. While the S-8337 series allows variable maximum duty ratios via an external resistor, the S-8338 series fixes this parameter at 88%. Both share similar internal architectures including UVLO and short-circuit protection.

Replacement Considerations

The S-8337ABEC-T8T1G is a related series member but offers variable maximum duty ratio control instead of the fixed 88% found in the S-8338 series. Verify if the fixed duty cycle constraint of the S-8338 is acceptable for the target design before substituting with the S-8337 variant.