S-8338ACFC-T8T1G

Overview

The S-8338ACFC-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 device features a fixed maximum duty ratio of 88% and supports an internal oscillation frequency adjustable up to 1.133 MHz via an external resistor. It includes 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 operational safety.
• Supports low minimum operating voltage suitable for portable systems.

Applications

• Power supply for LCD displays
• Portable electronic systems requiring low voltage operation

Procurement Notes

Verify the specific suffix ACFC against official datasheets to confirm output configuration and pin compatibility. Confirm RoHS compliance status and check for product change notifications regarding material or manufacturing updates before finalizing procurement orders.

Selection Notes

Select this component when a fixed 88% maximum duty ratio is required rather than the adjustable ratio found in the S-8337 series. Ensure the application requires a PWM controller capable of driving external power switches with frequencies up to 1.133 MHz.

Part Context

This part belongs to the S-8338 series of high-frequency PWM control switching regulator controllers. It shares core architecture with the S-8337 series but differs in having a fixed maximum duty ratio instead of an externally adjustable one, simplifying design for specific boost converter topologies.

Replacement Considerations

S-8338ABEC-T8T1G: Verified substitute within the same series offering identical functional characteristics and package type.

FAQ

How is the oscillation frequency determined?

The internal oscillation frequency can be set up to 1.133 MHz by connecting a resistor to the ROSC pin.

What protection features are included?

The device includes an under-voltage lockout circuit (UVLO) and a timer latch short-circuit protection circuit.