S-8333ABIA-T8T1G

Overview

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

Feature Summary

• Integrates complete PWM control logic including UVLO and short-circuit protection circuits
• Supports high-frequency operation with programmable oscillation settings
• Features adjustable maximum duty ratio for flexible output voltage regulation
• Enables stability tuning through external phase compensation network

Applications

• Power supply systems for LCD panels
• Portable electronic devices requiring low voltage operation
• Battery-powered consumer electronics
• General-purpose DC-DC boost converter designs

Procurement Notes

Verify the specific suffix code against official datasheets to confirm exact electrical characteristics and availability status. Confirm RoHS compliance and environmental declarations prior to ordering. Ensure compatibility with standard surface-mount assembly processes for the TSSOP-8 package. Check for any recent product change notifications that may affect specifications or packaging details before finalizing procurement plans.

Selection Notes

Select this component when designing boost converters requiring integrated PWM control rather than discrete solutions. Consider the 1.8 V minimum operating voltage for applications powered by single-cell lithium batteries. Evaluate the external component requirements for frequency setting and duty ratio adjustment against board space constraints. Compare transient response capabilities with system load requirements to ensure adequate phase compensation design.

Part Context

This part belongs to the S-8333 series of high-frequency step-up switching regulators from ABLIC. The series is designed for portable applications where low input voltage and high efficiency are critical. Unlike integrated regulators, this controller requires external power switches and passive components. It shares architectural similarities with the S-8337 series but offers distinct duty ratio control features.

Replacement Considerations

Direct substitutes within the same family include variants such as S-8333AAHB-T8T1G and S-8333ABCB-T8T1G. These parts share identical pinouts and core functionality but differ in fixed output voltage settings or internal configuration parameters. Verify that alternative suffixes match the required output voltage specification for the target application.