S-8333ABDA-T8T1G

Overview

The S-8333ABDA-T8T1G is a CMOS step-up switching regulator controller from the S-8333 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 1.08 MHz via an external resistor on the ROSC pin. It includes under-voltage lockout (UVLO), timer latch short-circuit protection, and soft-start functionality. The maximum duty ratio is adjustable through an external resistor connected to the RDuty pin. Phase compensation is configurable using external components on the CC pin. The component is housed in an 8-TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Features low minimum operating voltage suitable for portable systems and LCD power supplies.
• Includes built-in under-voltage lockout and timer latch short-circuit protection circuits.

Applications

• Power supply for LCD displays
• Portable electronic systems operating on low voltage
• General-purpose DC-DC step-up converter controllers

Procurement Notes

Verify the specific suffix 'ABDA' against official ABLIC documentation to confirm exact output configuration or factory settings, as variations within the S-8333 series may exist. Confirm RoHS compliance status and lead-free certification details directly with the manufacturer or authorized distributors prior to ordering. Ensure the selected part number matches the required oscillation frequency range and duty ratio adjustment capabilities for your specific circuit design.

Selection Notes

Select this controller when designing boost converters requiring high-frequency operation up to 1.08 MHz with adjustable duty cycle limits. It is appropriate for applications needing a wide input voltage range starting from 1.8 V. Consider the external component requirements for setting the switching frequency and phase compensation. Evaluate the need for short-circuit protection and soft-start features inherent in this series compared to simpler regulators.

Part Context

This component belongs to the S-8333 Series of CMOS step-up switching regulator controllers. The series is designed for high-frequency operation and low-voltage applications. It shares architectural similarities with the S-8337 and S-8338 series but differs in specific parameter configurations such as maximum duty ratio control methods. The S-8333 series generally allows for flexible duty ratio adjustment via external resistors.

Replacement Considerations

S-8333AACB-T8T1G

FAQ

How is the switching frequency determined?

The internal oscillation frequency is set by connecting a resistor to the ROSC pin, allowing frequencies up to 1.08 MHz.

What protection features are included?

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