S-8338ACHB-P8T1G

Overview

The S-8338ACHB-P8T1G is a CMOS step-up switching regulator controller from the S-8338 series 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, adjustable via an external resistor. The device utilizes pulse width modulation (PWM) control with a maximum duty ratio of 88.5%. It features under-voltage lockout (UVLO) and timer latch short-circuit protection circuits. The component is housed in an 8-SON(A) package measuring 2.9 x 2.8 mm and functions across a temperature range of -40°C to 85°C.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Includes under-voltage lockout and timer latch short-circuit protection mechanisms.
• Supports high-frequency operation with externally adjustable oscillation settings.

Applications

• Power supplies for LCD panels
• Portable electronic systems operating on low voltage
• DC-DC conversion in battery-powered devices

Procurement Notes

Verify the specific suffix P8T1G corresponds to the 8-SON(A) package configuration as documented in official datasheets. Confirm RoHS compliance status and check for any recent Product Change Notifications regarding material or manufacturing site updates before finalizing procurement specifications.

Selection Notes

Select this component when designing boost converters requiring input voltages as low as 1.8 V. Ensure the external feedback network aligns with the desired output voltage while respecting the 88.5% maximum duty cycle limit. Verify that the selected switching frequency remains within the supported range of approximately 257 kHz to 1.134 MHz for optimal efficiency.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8338 variant specifically offers a higher maximum duty ratio compared to the S-8337 series, making it suitable for applications requiring larger voltage conversion ratios. Both series share similar protection features and low-voltage operational capabilities.

Replacement Considerations

S-8338ACCB-T8T1G

FAQ

What is the maximum duty ratio for the S-8338ACHB-P8T1G?

The maximum duty ratio is 88.5%, which allows for significant step-up voltage conversion capabilities.

How is the oscillation frequency adjusted?

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