S-8338AAFB-T8T1G

Overview

The S-8338AAFB-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 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 device features a fixed maximum duty ratio of 88% and includes under-voltage lockout (UVLO) and timer latch short-circuit protection circuits. 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.
• Supports low-voltage operation starting at 1.8 V, suitable for portable systems.
• Includes built-in under-voltage lockout and short-circuit protection mechanisms.

Applications

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

Procurement Notes

Verify the specific suffix 'AAFB' against the official ABLIC datasheet to confirm output configuration and enable logic. Ensure the ordering suffix aligns with the required factory pack quantity of 3000 units per reel. Confirm RoHS compliance status through the manufacturer's environmental declaration before finalizing procurement.

Selection Notes

Select this component when a fixed 88% maximum duty ratio is required for boost converter designs. 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 operating voltage for compatibility with single-cell battery 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. Both share similar internal architectures and protection features.

Replacement Considerations

The S-8337 series serves as a functional alternative if variable duty ratio control is needed instead of the fixed 88% limit. Verify pin compatibility and electrical specifications before substituting with other ABLIC boost controllers or competitors offering similar 1.2 MHz PWM capabilities.