S-8337AAFC-T8T1G

Overview

The S-8337AAFC-T8T1G 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 supports an internal oscillation frequency up to 1.133 MHz via an external resistor on the ROSC pin. The device utilizes pulse width modulation (PWM) control with a maximum duty ratio adjustable through an external resistor connected to the RDuty pin. Phase compensation and gain are configurable using components on the CC pin. It features under-voltage lockout (UVLO) and timer latch short-circuit protection, packaged in an 8-TSSOP format.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for high-frequency step-up regulation.
• Features programmable maximum duty ratio via external resistance for flexible output control.
• Includes built-in under-voltage lockout and timer latch short-circuit protection circuits.

Applications

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

Procurement Notes

Verify the specific suffix 'AAFC' against official ABLIC documentation to confirm exact electrical tolerances and factory settings. Confirm lead times and minimum order quantities directly with authorized distributors, as availability may vary. Ensure compliance with RoHS standards and check for any recent product change notifications or obsolescence notices prior to finalizing procurement orders.

Selection Notes

Select this component when designing boost converters requiring operation down to 1.8 V input. Choose based on the need for adjustable duty cycle via the RDuty pin rather than fixed ratios. Consider the 8-TSSOP package for surface-mount applications. Evaluate external component requirements for ROSC and CC pins to meet specific frequency and stability targets within the -40°C to 85°C operating range.

Part Context

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

Replacement Considerations

Direct substitutes within the same family include other S-8337 variants with different suffixes, such as S-8337ABEC-T8T1G or S-8337ACDC-T8T1G, provided their specific electrical parameters match the design requirements. Verify pin compatibility and package dimensions before substitution.