S-8337ABFA-T8T1G

Overview

The S-8337ABFA-T8T1G 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 internal oscillation frequency is adjustable up to 1.133 MHz via an external resistor connected to the ROSC pin. The maximum duty ratio is configurable through an external resistor on the RDuty pin. Phase compensation and gain are adjusted using components connected to the CC pin. The device includes under-voltage lockout and timer latch short-circuit protection circuits.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, PWM controller, UVLO, and short-circuit protection.
• Supports high-frequency operation with externally adjustable oscillation frequency up to 1.133 MHz.
• Allows customization of maximum PWM duty ratio via external resistance.
• Enables stability tuning through external phase compensation and gain adjustment.

Applications

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

Procurement Notes

Verify the specific suffix T8T1G corresponds to the TSSOP-8 package and reel packaging configuration. Confirm RoHS compliance status and check for any Product Change Notifications (PCN) regarding material or marking updates. Ensure the ordering quantity aligns with the manufacturer's standard factory pack quantity requirements.

Selection Notes

Select this component when designing boost converters requiring low minimum operating voltage and flexible frequency settings. The S-8337 series allows duty ratio adjustment, unlike the fixed-duty S-8338 variant. Consider external component values for ROSC, RDuty, and CC pins to meet specific transient response and stability requirements.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for portable applications needing efficient power management from low-voltage sources. The S-8337 variant specifically offers adjustable duty ratios, providing design flexibility compared to fixed-ratio alternatives in the same family.

Replacement Considerations

S-8337AAEB-T8T1G, S-8337ABEC-T8T1G, S-8337AAHA-T8T1G, S-8337ACDC-T8T1G, S-8337AAEA-T8T1G, S-8337AAFC-T8T1G