S-8338ACHA-T8T1G

Overview

The S-8338ACHA-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 maximum duty ratio is fixed at 88%. The device incorporates under-voltage lockout (UVLO) and timer latch short-circuit protection circuits, packaged in an 8-pin TSSOP format.

Feature Summary

• Integrates UVLO and timer latch short-circuit protection for enhanced operational safety
• Features a low minimum operating voltage suitable for portable systems
• Allows external adjustment of oscillation frequency and phase compensation

Applications

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

Procurement Notes

Verify the specific suffix 'CHA' against official ABLIC documentation to confirm exact electrical tolerances and marking codes. Confirm RoHS compliance status and package dimensions with the manufacturer datasheet before finalizing procurement specifications.

Selection Notes

Select this component when a fixed maximum duty ratio is required rather than the adjustable ratio found in the S-8337 series. Ensure the application design accommodates the 1.8 V to 6 V input range and utilizes external components for setting the desired switching frequency and loop stability.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. The S-8338 variant specifically distinguishes itself by providing a fixed maximum duty ratio, whereas the S-8337 allows for variable duty ratio control through external resistors.

Replacement Considerations

S-8338ABEC-T8T1G

FAQ

How is the switching 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.