S-8338AAHB-T8T1G

Overview

The S-8338AAHB-T8T1G is a CMOS step-up switching regulator controller from the S-8338 series by ABLIC Inc. It operates within an input 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 fixed at 88%. The device includes an under-voltage lockout circuit and a timer latch short-circuit protection circuit. It is housed in an 8-pin 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 and LCD power supplies.
• Includes built-in under-voltage lockout and timer latch short-circuit protection circuits.

Applications

• Power supply for LCD modules
• Portable electronic systems requiring low voltage operation
• General purpose DC-DC step-up converter designs

Procurement Notes

Verify the specific suffix 'AAHB' against official ABLIC documentation to confirm exact electrical tolerances and marking codes. Ensure compatibility with the required switching frequency settings and duty cycle constraints defined in the datasheet. Confirm package type matches the design footprint requirements.

Selection Notes

Select this component when a fixed maximum duty ratio of 88% is acceptable for the boost topology. Choose based on the need for high-frequency operation up to 1.133 MHz to minimize passive component size. Consider the 1.8 V minimum start-up voltage for battery-powered applications.

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 duty ratio adjustment via an external resistor.

Replacement Considerations

S-8338ABEB-T8T1G and S-8338ABEC-T8T1G are documented members of the same S-8338 series with identical core functional specifications regarding topology and protection features.