S-8337AAHA-P8T1G

Overview

The S-8337AAHA-P8T1G is a CMOS step-up switching regulator controller from the S-8337 series by ABLIC Inc. It operates with a minimum supply voltage of 1.8 V and features an internal oscillator adjustable up to 1.133 MHz via an external resistor on the ROSC pin. The device utilizes pulse width modulation (PWM) control, where the maximum duty ratio is configurable through an external resistor connected to the RDuty pin. Phase compensation and gain are adjusted using components on the CC pin. It includes under-voltage lockout and timer latch short-circuit protection circuits.

Feature Summary

• Configurable PWM maximum duty ratio via external resistor
• Adjustable internal oscillation frequency up to 1.133 MHz
• Integrated under-voltage lockout and short-circuit protection

Applications

• Power supplies for LCD panels
• Portable systems operating on low voltage
• Step-up DC-DC converter controllers

Procurement Notes

Verify the specific suffix 'P8' indicates the 8-SON package variant rather than TSSOP when sourcing. Confirm RoHS compliance status and REACH registration details directly with ABLIC documentation. Ensure ordering quantities align with manufacturer standard packaging requirements. Cross-reference the exact part number against official datasheets to confirm functional parameters match design specifications.

Selection Notes

Select this component for applications requiring low input voltage operation starting at 1.8 V. The adjustable frequency allows optimization for specific inductor sizes and efficiency targets. The programmable duty ratio offers flexibility in output voltage range selection compared to fixed-duty alternatives. Consider thermal performance and external component values for stability during transient responses.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8337 series distinguishes itself by allowing user-defined maximum duty ratios, whereas the S-8338 series fixes this parameter. Both share similar core architectures including reference voltage circuits, error amplifiers, and protection logic within compact surface-mount packages.

Replacement Considerations

S-8337ABBA-T8T1G

FAQ

How is the switching frequency determined?

The internal oscillation frequency is set externally by connecting a resistor to the ROSC pin, allowing adjustment up to 1.133 MHz.

What protection features are integrated?

The device includes an under-voltage lockout circuit and a timer latch short-circuit protection circuit.