S-8333ACIC-T8T1G

Overview

The S-8333ACIC-T8T1G is a CMOS step-up switching regulator controller manufactured by ABLIC Inc. It operates with a minimum input voltage of 1.8 V, making it suitable for low-voltage portable systems and LCD power supplies. The device integrates a reference voltage circuit, oscillator, error amplifier, PWM controller, UVLO, and timer latch short-circuit protection. The internal oscillation frequency is adjustable up to 1.2 MHz via an external resistor on the ROSC pin. Maximum duty ratio control is configurable through an external resistor on the RDuty pin. Phase compensation and gain are adjustable using components connected to the CC pin. The IC is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates high-frequency PWM control with adjustable oscillation frequency up to 1.2 MHz
• Features low minimum operating voltage of 1.8 V for efficient low-voltage system operation
• Includes built-in under voltage lockout (UVLO) and timer latch short-circuit protection circuits
• Allows flexible configuration of maximum duty ratio and phase compensation via external passive components

Applications

• Power supply for liquid crystal displays (LCDs)
• Portable electronic systems requiring low voltage operation
• Step-up conversion in battery-powered devices

Procurement Notes

Verify the specific suffix codes against official ABLIC documentation to confirm output voltage settings, tolerance levels, and packaging details. Ensure compatibility with required thermal management and PCB layout guidelines specified in the datasheet. Confirm RoHS compliance status and lead-free requirements prior to ordering. Cross-reference the part number with current manufacturer availability lists to avoid obsolete stock issues.

Selection Notes

Select this component when designing boost converter topologies requiring precise duty cycle adjustment and high-frequency operation. Consider the external component requirements for setting oscillation frequency and stability compensation. Evaluate the 1.8 V minimum input constraint against the source voltage profile. Assess the need for integrated short-circuit protection versus external solutions based on system safety requirements.

Part Context

This part belongs to the S-8333 series of high-frequency PWM control switching regulators. The series is designed for applications demanding compact size and efficient power conversion from low voltage sources. It serves as a controller rather than a complete regulator, requiring external power switches and passive components to form a functional DC-DC converter circuit.

Replacement Considerations

The S-8333ABEC-T8T1G is a documented substitute within the same series offering similar functionality. Verify pin compatibility and electrical parameter alignment before substitution. Check if fixed or adjustable duty ratio configurations match the design requirements.