S-8337ACHB-P8T1G

Overview

The S-8337ACHB-P8T1G is a CMOS step-up switching regulator controller from the S-8337 series, manufactured by ABLIC Inc. It operates within a supply 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 1.133 MHz via an external resistor. It provides programmable maximum duty ratio control through an external resistor connected to the RDuty pin. The component is housed in an 8-SMD, flat lead package, specifically identified as 8-SON(A)(2.9x2.8).

Feature Summary

• Integrates a reference voltage circuit, error amplifier, and PWM controller for stable regulation.
• Features timer latch short-circuit protection and under-voltage lockout (UVLO) circuits.
• Allows adjustment of phase compensation and gain values via external resistor and capacitor connections.

Applications

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

Procurement Notes

Verify the specific suffix P8T1G corresponds to the 8-SON(A) package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation or certified distributor declarations prior to integration. Ensure the ordering quantity aligns with standard manufacturing packaging requirements specified by ABLIC Inc.

Selection Notes

Select this component for designs requiring high-frequency operation up to 1.133 MHz to minimize passive component size. The adjustable duty ratio feature allows optimization for specific input-output voltage differentials. Verify that the external components selected for the ROSC, RDuty, and CC pins meet the stability requirements defined in the electrical characteristics section of the datasheet.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. The S-8337 variant distinguishes itself from the S-8338 series by offering a programmable maximum duty ratio, whereas the S-8338 series has a fixed maximum duty ratio. Both series share the same core architecture and low minimum operating voltage capability.

Replacement Considerations

The S-8338ABEC-T8T1G serves as a functional alternative within the same series, though it features a fixed maximum duty ratio rather than the programmable ratio found in the S-8337 series. Designers must verify if the fixed duty ratio meets their specific boost converter requirements before substituting.