S-8338ACGB-T8T1G

Overview

The S-8338ACGB-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. This specific variant features a fixed maximum duty ratio of 88%. It is housed in an 8-pin TSSOP package and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates a reference voltage circuit, oscillator, error amplifier, PWM controller, UVLO, and timer latch short-circuit protection.
• Supports low-voltage operation starting at 1.8 V, suitable for portable systems.
• Features a fixed maximum duty ratio of 88% for simplified design.
• Allows phase compensation and gain adjustment via external components connected to the CC pin.

Applications

• Power supply for LCD panels
• Portable electronic systems requiring low voltage operation

Procurement Notes

Verify the complete part number including suffixes such as T8T1G against official ABLIC documentation to ensure correct packaging and specifications. Confirm RoHS compliance status through current datasheets or environmental reports. Check for any product change notifications regarding material composition or manufacturing location updates before finalizing procurement orders.

Selection Notes

Select this component when a fixed 88% duty ratio meets the boost converter requirements. Use the ROSC pin to set the switching frequency up to 1.133 MHz based on external resistance. Ensure the input voltage remains above 1.8 V for proper operation. Adjust the CC pin components to optimize stability and transient response for the specific load conditions.

Part Context

This device belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. While the S-8337 series allows variable maximum duty ratio control via an external resistor, the S-8338 series fixes this parameter. Both series share similar internal architectures and are designed for efficient power management in compact portable applications.

Replacement Considerations

The S-8337ABEC-T8T1G serves as a functional alternative within the same series, offering variable maximum duty ratio control instead of the fixed 88% ratio found in the S-8338ACGB-T8T1G. Designers must verify if the variable duty ratio capability aligns with their specific circuit requirements.