S-8338ABFB-T8T1G

Overview

The S-8338ABFB-T8T1G is a CMOS step-up switching regulator controller from the S-8338 series, manufactured by ABLIC Inc. It operates within an input voltage range of 1.8 V to 6 V and supports a maximum oscillation frequency of 1.133 MHz via an external resistor on the ROSC pin. The device features a fixed maximum duty ratio of 88% and utilizes pulse width modulation (PWM) control. It is housed in an 8-pin TSSOP package and includes built-in under-voltage lockout and timer latch short-circuit protection circuits.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Features a low minimum operating voltage of 1.8 V suitable for portable systems.
• Includes under-voltage lockout and timer latch short-circuit protection for enhanced reliability.

Applications

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

Procurement Notes

Verify the specific suffix 'ABFB' against official ABLIC documentation to confirm exact electrical tolerances and factory settings, as these parameters are not detailed in general series datasheets. Confirm the package type matches the required PCB footprint. Ensure compliance with RoHS standards if applicable to the target market. Check for any recent product change notices regarding material composition or marking changes before finalizing procurement orders.

Selection Notes

Select this component when a fixed 88% maximum duty ratio is required for the boost converter topology. It is appropriate for designs needing an internal oscillator adjustable up to 1.133 MHz without external clock synchronization. Consider the 1.8 V minimum operating voltage constraint for input source capabilities. Evaluate the thermal performance requirements for the TSSOP-8 package in the intended application environment.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. The S-8338 variant distinguishes itself from the S-8337 series by having a fixed maximum duty ratio, whereas the S-8337 allows adjustment via an external resistor. Both series share similar core architectures including UVLO and short-circuit protection mechanisms.

Replacement Considerations

S-8338ABEC-T8T1G and S-8338ACGA-T8T1G are alternative parts within the same series offering identical functional characteristics but potentially different manufacturing batches or minor parameter variations. Verify pin compatibility and electrical specifications before substitution.