S-8338ABBA-P8T1G

Overview

The S-8338ABBA-P8T1G is a CMOS step-up switching regulator controller from the S-8338 series, manufactured by ABLIC Inc. It operates with a minimum input voltage of 1.8 V and supports an internal oscillation frequency settable up to 1.133 MHz via an external resistor on the ROSC pin. The device utilizes pulse-width modulation (PWM) control with a fixed maximum duty ratio of 88%. It features a reference voltage accuracy of ±1.5% at 1.0 V and includes under-voltage lockout (UVLO) and timer latch short-circuit protection circuits. The component is housed in an 8-SON package.

Feature Summary

• Supports low-voltage operation starting at 1.8 V for portable systems
• Features adjustable internal oscillation frequency up to 1.133 MHz
• Includes timer latch short-circuit protection circuit
• Allows adjustment of phase compensation and gain via external components

Applications

• Power supply for LCD panels
• Portable electronic systems operating on low voltage
• Step-up DC-DC converter designs requiring high-frequency PWM control

Procurement Notes

Verify the specific suffix P8T1G against the manufacturer's current datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with the required switching frequency setting resistor values. Confirm that the fixed 88% duty ratio meets the target output voltage requirements for the intended boost topology application.

Selection Notes

Select this component when a fixed maximum duty ratio of 88% is acceptable for the boost conversion ratio. Choose based on the need for high-frequency operation up to 1.133 MHz to minimize passive component size. Consider the 1.8 V minimum operating voltage for battery-powered applications. Verify that the 8-SON package fits the available PCB footprint.

Part Context

This part belongs to the S-8337/8338 series of step-up switching regulator controllers. The S-8338 variant is distinguished by its fixed maximum duty ratio, unlike the S-8337 which allows duty ratio adjustment. Both series share similar core architectures including UVLO and short-circuit protection, designed for low-voltage portable applications.

Replacement Considerations

The S-8337 series may serve as a functional alternative if adjustable maximum duty ratio is required instead of the fixed 88% limit. Verify pin compatibility and control characteristics such as PWM mode and frequency range before substitution.