S-8338ACHA-P8T1G

Overview

The S-8338ACHA-P8T1G 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 device supports an internal oscillation frequency adjustable up to 1.134 MHz via an external resistor. Packaged in an 8-SON format measuring 2.9 mm by 2.8 mm, it functions as a positive output boost DC-DC switching controller with one output stage. The component is rated for operation between -40°C and 85°C.

Feature Summary

• Integrates a reference voltage circuit, oscillator, error amplifier, and PWM controller for efficient power management.
• Features a timer latch short-circuit protection circuit to enhance system reliability under fault conditions.
• Supports low-voltage operation starting at 1.8 V, suitable for portable systems powered by single-cell batteries.

Applications

• Power supply circuits for liquid crystal displays (LCDs).
• Portable electronic systems requiring low operating voltages.
• Step-up DC-DC conversion in battery-operated devices.

Procurement Notes

Verify the specific suffix P8T1G against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with the required switching frequency settings and check for any product change notifications that may affect pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when designing boost converters requiring high-frequency operation up to 1.134 MHz to minimize passive component size. Consider the 1.8 V minimum input voltage for applications powered by lithium-ion cells. Verify that the 8-SON package dimensions fit the target PCB layout and that the thermal performance meets the requirements for the expected load current.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. These devices are designed for applications needing compact power solutions with low input voltage capabilities. The series integrates essential control loops and protection features into a small footprint, targeting efficiency and space-constrained designs.

Replacement Considerations

Consult the official datasheet for cross-reference information. No direct substitute part numbers are explicitly confirmed in the provided source material. Verify functional equivalence regarding input voltage range, switching frequency, and package dimensions if considering alternative components.

FAQ

How is the oscillation frequency determined?

The internal oscillation frequency can be set up to 1.134 MHz by connecting a resistor to the ROSC pin.

What protection features are included?

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