S-8338AAEB-T8T1G

Overview

The S-8338AAEB-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 internal oscillation frequency of 1.133 MHz via an external resistor on the ROSC pin. The device utilizes pulse width modulation (PWM) control with a fixed maximum duty ratio of 88%. It features an under-voltage lockout circuit and a timer latch short-circuit protection circuit. The component is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Includes under-voltage lockout and timer latch short-circuit protection circuits for enhanced reliability.
• Allows adjustable phase compensation and gain via external resistor and capacitor connections.

Applications

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

Procurement Notes

Verify the specific suffix codes against the official datasheet to confirm exact electrical characteristics and package type. Ensure compatibility with required input voltage ranges and switching frequencies. Confirm RoHS compliance status through manufacturer documentation before integration into final designs.

Selection Notes

Select this controller for applications requiring low minimum operating voltages down to 1.8 V. Consider the fixed 88% maximum duty ratio when designing boost converter topologies. Utilize the ROSC pin for frequency setting up to 1.133 MHz to optimize efficiency and component size.

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 with a fixed maximum duty ratio, unlike the S-8337 series which allows duty ratio adjustment via an external resistor. Both series share similar core architectures and protection features.

Replacement Considerations

The S-8337ABEB-T8T1G serves as a functional alternative within the same series, offering adjustable maximum duty ratio capabilities instead of the fixed configuration found in the S-8338 series. Verify pin compatibility and electrical specifications before substitution.