S-8333ABFA-T8T1G

Overview

The S-8333ABFA-T8T1G is a CMOS step-up switching regulator controller manufactured by ABLIC Inc. It operates within a supply voltage range of 1.8 V to 6 V and utilizes PWM control with an internal oscillation frequency of approximately 1.2 MHz. The device is housed in an 8-pin TSSOP package and includes built-in under-voltage lockout (UVLO) and timer latch short-circuit protection circuits. Designed for low-voltage applications, it supports external adjustment of the maximum duty ratio via an external resistor connected to the RDuty pin.

Feature Summary

• Integrates under-voltage lockout and timer latch short-circuit protection circuits for enhanced operational safety.
• Supports external setting of the maximum duty ratio through a resistor connected to the RDuty pin.
• Features a low minimum operating voltage suitable for portable systems powered by single cells.

Applications

• Power supplies for LCD panels
• Portable electronic systems requiring low input voltage operation

Procurement Notes

Verify the specific output voltage configuration associated with the ABFA suffix against the official datasheet before procurement. Confirm that the required external components, including the oscillator resistor and duty cycle setting resistor, match the design specifications. Ensure compatibility with the 8-TSSOP package dimensions and thermal requirements for the target application environment.

Selection Notes

Select this component when a non-synchronous boost controller with adjustable duty cycle limits is required. It is appropriate for designs needing integrated short-circuit protection and UVLO without external implementation. Consider the 1.2 MHz switching frequency for balancing component size and efficiency in compact form factors.

Part Context

This part belongs to the S-8333 Series of high-frequency PWM control switching regulator controllers. The series is characterized by its ability to operate from low input voltages, making it distinct from standard regulators requiring higher supply rails. The ABFA designation indicates a specific fixed output voltage variant within this family.

Replacement Considerations

Direct substitutes include other parts within the S-8333 series such as S-8333AAHA or S-8337AAHA, provided the output voltage and pin compatibility align with the circuit design. Verify functional equivalence regarding the adjustable duty ratio feature and protection mechanisms.