S-8338ACFB-P8T1G

Overview

The S-8338ACFB-P8T1G 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 supports an internal oscillation frequency up to 1.133 MHz via an external resistor on the ROSC pin. The device features a fixed maximum duty ratio of 88% and utilizes pulse width modulation (PWM) control. It includes an under-voltage lockout circuit and a timer latch short-circuit protection circuit. The component is housed in an 8-SON package with dimensions of 2.9x2.8 mm.

Feature Summary

• Integrates a reference voltage circuit, oscillator, error amplifier, PWM controller, UVLO, and short-circuit protection.
• Supports adjustable internal oscillation frequency up to 1.133 MHz using an external resistor.
• Features a fixed maximum duty ratio for simplified design implementation.
• Allows phase compensation and gain adjustment via external resistor and capacitor connections.

Applications

• Power supply for LCD panels
• Portable systems operating on low voltage
• Step-up DC-DC converter designs

Procurement Notes

Verify the specific suffix 'P8' corresponds to the 8-SON package configuration rather than TSSOP variants found in other series members. Confirm RoHS compliance status through official documentation, as some listings indicate detailed compliance requirements. Ensure the ordering quantity aligns with manufacturer standard packaging specifications when sourcing components.

Selection Notes

Select this model for applications requiring a fixed duty ratio characteristic distinct from the adjustable duty ratio of the S-8337 series. Consider the 1.8 V minimum operating voltage for low-power portable designs. Evaluate the need for external frequency setting resistors and phase compensation components to meet specific transient response and stability requirements.

Part Context

This component 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, whereas the S-8337 allows duty ratio control via an external resistor. Both series share similar internal architectures including UVLO and short-circuit protection mechanisms designed for efficient power management in compact form factors.

Replacement Considerations

S-8338ABEA-P8T1G

FAQ

How is the oscillation frequency determined?

The internal oscillation frequency can be set up to 1.133 MHz by connecting a resistor to the ROSC pin.

What protection circuits are included?

The device includes an under-voltage lockout (UVLO) circuit and a timer latch short-circuit protection circuit.