S-8337ACIC-T8T1G

Overview

The S-8337ACIC-T8T1G is a CMOS step-up switching regulator controller from the S-8337 series, manufactured 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 an internal oscillator with a frequency settable up to 1.133 MHz via an external resistor on the ROSC pin. Maximum duty ratio is adjustable through an external resistor connected to the RDuty pin. Phase compensation and gain are configurable using components on the CC pin. It includes under-voltage lockout and timer latch short-circuit protection circuits.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, PWM controller, UVLO, and short-circuit protection.
• Allows external adjustment of oscillation frequency up to 1.133 MHz via the ROSC pin.
• Enables customization of maximum PWM duty ratio through the RDuty pin.
• Supports stability tuning via phase compensation and gain adjustments on the CC pin.

Applications

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

Procurement Notes

Verify the specific suffix ACIC against official datasheets to confirm exact electrical characteristics, as variations exist within the S-8337 family. Confirm package type TSSOP-8 and reel packaging details. Ensure compliance with RoHS standards and check for any product change notifications or obsolescence notices prior to procurement.

Selection Notes

Select this component when designing boost converters requiring high-frequency operation up to 1.2 MHz. It is suitable for applications needing adjustable duty cycles and flexible frequency settings. Consider the minimum operating voltage of 1.8 V for low-power portable designs. Verify that external passive components match the required compensation and timing specifications.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. The series is designed for step-up applications in portable electronics. The S-8337 variant specifically allows user-defined maximum duty ratios, distinguishing it from the fixed-duty S-8338 series. Both share similar core architectures including UVLO and protection circuits.

Replacement Considerations

S-8337ABEC-T8T1G

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.