S-8338AACA-T8T1G

Overview

The S-8338AACA-T8T1G is a CMOS step-up switching regulator controller from the S-8338 series, manufactured by ABLIC Inc. It operates within a supply 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 connected to 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
• Features timer latch short-circuit protection circuit for enhanced system safety
• Supports adjustable internal oscillation frequency up to 1.133 MHz via external components
• Includes under-voltage lockout circuit to ensure stable operation at low input voltages

Applications

• Power supply for LCD panels
• Portable systems operating on low voltage
• Step-up DC-DC converter designs requiring high-frequency PWM control

Procurement Notes

Verify the specific suffix 'T8T1G' against the manufacturer's current datasheet to confirm packaging details and compliance status. Ensure the ordering information matches the exact part number to avoid discrepancies in pin configuration or electrical characteristics. Cross-reference with official distributor catalogs for accurate availability and lead times.

Selection Notes

Select this component when a fixed maximum duty ratio of 88% is required for boost applications. It is suitable for designs needing an adjustable switching frequency up to 1.133 MHz. Consider the 1.8 V minimum operating voltage for low-power portable applications. Verify that the TSSOP-8 package fits the PCB layout constraints.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8338 variant is distinguished by its fixed maximum duty ratio, unlike the S-8337 series which allows duty ratio adjustment via an external resistor. Both series share similar core architectures including UVLO and short-circuit protection.

Replacement Considerations

The S-8337 series serves as a functional alternative if adjustable maximum duty ratio is preferred over the fixed 88% limit. Verify pin compatibility and electrical specifications before substitution.