S-8338ABAB-T8T1G

Overview

The S-8338ABAB-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 with a maximum internal oscillation frequency of 1.133 MHz. 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.
• Includes under-voltage lockout and timer latch short-circuit protection for enhanced system reliability.
• Supports external adjustment of phase compensation and gain via connected resistor and capacitor values.

Applications

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

Procurement Notes

Verify the specific suffix codes against the official datasheet to confirm pin compatibility and electrical characteristics. Ensure that the ordering quantity aligns with the manufacturer's standard packaging requirements. Confirm RoHS compliance status and check for any recent product change notifications prior to finalizing procurement orders.

Selection Notes

Select this component when a low minimum operating voltage of 1.8 V is required for boost applications. The fixed 88% duty ratio distinguishes it from the S-8337 series, which allows variable duty ratio control. Consider the 1.2 MHz switching frequency for balancing efficiency and component size in portable designs.

Part Context

This part belongs to the S-8338 series of high-frequency PWM control switching regulator controllers. It is designed as a CMOS solution for portable systems, offering stability through adjustable phase compensation. The series is distinct from the S-8337 family primarily due to its fixed maximum duty ratio configuration.

Replacement Considerations

The S-8337 series serves as a functional alternative if variable maximum duty ratio control via an external resistor is required instead of the fixed 88% limit found in the S-8338 series. Verify package compatibility and UVLO thresholds when substituting.