S-8338ABIA-T8T1G

Overview

The S-8338ABIA-T8T1G is a CMOS step-up switching regulator controller from the S-8338 series 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 internal oscillation frequency is adjustable up to 1.133 MHz via an external resistor on the ROSC pin. The device features a fixed maximum duty ratio of 88% and includes under-voltage lockout (UVLO) and timer latch short-circuit protection circuits. It is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Includes under-voltage lockout and timer latch short-circuit protection for enhanced operational safety.
• Supports flexible frequency adjustment up to 1.133 MHz using external components connected to the ROSC pin.

Applications

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

Procurement Notes

Verify the specific suffix 'T8T1G' against the manufacturer's official documentation to confirm the exact tape-and-reel packaging configuration and marking details. Ensure compatibility with the required TSSOP-8 footprint and verify that the fixed 88% duty ratio aligns with the target output voltage requirements before finalizing procurement.

Selection Notes

Select this component when a fixed maximum duty ratio is acceptable for the boost application. The S-8338 series differs from the S-8337 series by having a fixed duty ratio rather than an externally adjustable one. Verify that the required switching frequency can be achieved within the 1.133 MHz limit using the available external resistor values for the ROSC pin.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for low-voltage operation starting at 1.8 V, making it suitable for battery-powered applications. The S-8338 variant specifically provides a fixed maximum duty ratio, distinguishing it from the S-8337 which allows duty ratio adjustment via an external resistor.

Replacement Considerations

The S-8337 series serves as a functional alternative if external duty ratio adjustment is required instead of the fixed 88% ratio found in the S-8338 series. Both share similar input voltage ranges and protection features but differ in their maximum duty ratio control mechanisms.