S-8338AAHB-P8T1G

Overview

The S-8338AAHB-P8T1G is a CMOS step-up switching regulator controller from the S-8338 series by ABLIC Inc. It operates within an input voltage range of 1.8V to 6V and supports a switching frequency between 257.4kHz and 1.134MHz. The device features a maximum duty ratio of 88.5% and functions as a positive output boost DC-DC controller. It utilizes pulse width modulation (PWM) control with current limit, enable, and frequency control characteristics. The component is housed in an 8-SON(A) package measuring 2.9x2.8mm and is rated for an operating temperature range of -40°C to 85°C.

Feature Summary

• Integrates internal oscillator and PWM controller for high-frequency step-up regulation
• Includes timer latch short-circuit protection circuit for enhanced reliability
• Supports external frequency setting via resistor connection to ROSC pin

Applications

• Power supply for LCD panels
• Portable electronic systems requiring low voltage operation
• Boost converter designs using external MOSFETs

Procurement Notes

Verify the specific suffix P8T1G against official datasheets to confirm the 8-SON(A) package type and tape-and-reel delivery format. Confirm RoHS compliance status and ensure the ordering quantity aligns with manufacturer standard packaging requirements. Cross-reference the full part number with the latest product change notifications to verify material specifications.

Selection Notes

Select this controller when designing boost converters requiring a wide input voltage range down to 1.8V. The adjustable switching frequency allows optimization for external component size versus efficiency. Ensure the external MOSFET and inductor ratings match the controller's drive capabilities and current limits. Verify that the required output voltage can be achieved within the 88.5% maximum duty cycle constraint.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulators. The S-8338 variant specifically offers a higher maximum duty ratio compared to the S-8337 series, facilitating higher step-up ratios. Both series share similar internal architectures including UVLO and reference voltage circuits, targeting portable applications.

Replacement Considerations

S-8338ABEA-P8T1G

FAQ

How is the switching frequency determined?

The internal oscillation frequency is set externally by connecting a resistor to the ROSC pin, allowing adjustment between 257.4kHz and 1.134MHz.

What protection features are included?

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