S-8337ABIA-T8T1G

Overview

The S-8337ABIA-T8T1G is a CMOS step-up switching regulator controller from the S-8337 series 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 on the ROSC pin. 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. The device includes under-voltage lockout and timer latch short-circuit protection, housed in an 8-TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation
• Features low minimum operating voltage suitable for portable systems
• Includes under-voltage lockout and timer latch short-circuit protection circuits

Applications

• Power supply for LCD panels
• Portable electronic systems operating on low voltage
• General DC-DC step-up converter designs

Procurement Notes

Verify the specific suffix ABIA against official datasheets to confirm exact electrical tolerances and factory test parameters. Confirm RoHS compliance status and REACH registration details with the manufacturer. Ensure the 8-TSSOP package dimensions match your PCB footprint requirements. Check for any product change notifications that may affect material composition or performance specifications.

Selection Notes

Select this component when designing boost converters requiring adjustable switching frequencies up to 1.2 MHz. It is appropriate for applications needing configurable maximum duty ratios via external resistors. Consider the 1.8 V minimum operating voltage for battery-powered devices. Evaluate the need for external phase compensation components to ensure stability across varying load conditions.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8337 variant allows user-defined maximum duty ratios, distinguishing it from the S-8338 series which has a fixed maximum duty ratio. Both series share similar core architectures including UVLO and short-circuit protection mechanisms.

Replacement Considerations

Direct substitutes within the same family include S-8337ACIB-T8T1G and S-8337AAHB-T8T1G. Verify pin compatibility and electrical parameter alignment before substitution.