S-8337AAFA-P8T1G

Overview

The S-8337AAFA-P8T1G is a CMOS step-up switching regulator controller from the S-8337 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 supports an internal oscillation frequency adjustable up to 1.133 MHz via an external resistor on the ROSC pin. It features a timer latch short-circuit protection circuit and under-voltage lockout (UVLO). The maximum duty ratio is configurable through an external resistor connected to the RDuty pin, while phase compensation and gain are adjusted using components on the CC pin. The component is housed in an 8-pin SON package.

Feature Summary

• Integrates a reference voltage circuit, oscillator, error amplifier, PWM controller, UVLO, and timer latch short-circuit protection.
• Enables flexible system design through externally adjustable oscillation frequency and maximum PWM duty ratio.
• Provides operational stability and transient response adjustment via external phase compensation components.

Applications

• Power supply for LCD modules
• Portable electronic systems operating on low voltage

Procurement Notes

Verify the specific suffix P8T1G against official documentation to confirm the exact package type and reel specifications. Confirm RoHS compliance status directly with the manufacturer or authorized distributors. Ensure the selected variant matches the required thermal and electrical characteristics for the target application environment.

Selection Notes

Select this component when designing boost converter circuits requiring high-frequency operation and low minimum input voltage. The S-8337 series allows customization of switching frequency and duty cycle limits, offering greater flexibility compared to fixed-parameter alternatives. Consider the 8-pin SON package for compact board layouts.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. While the S-8338 series features a fixed maximum duty ratio, the S-8337 series, including this model, provides user-adjustable duty ratio control. This distinction makes the S-8337 series suitable for applications requiring specific output voltage ranges that necessitate variable duty cycle limits.

Replacement Considerations

The S-8338ABEC-T8T1G serves as a functional alternative within the same series, though it possesses a fixed maximum duty ratio rather than the adjustable configuration found in the S-8337AAFA-P8T1G. Designers must verify if the fixed duty ratio meets their specific output voltage requirements before substituting.