S-8338ACHC-P8T1G

Overview

The S-8338ACHC-P8T1G is a CMOS step-up switching regulator controller manufactured by ABLIC Inc. It operates within an input voltage range of 1.8 V to 6 V and supports a maximum internal oscillation frequency of 1.133 MHz via the ROSC pin. The device utilizes pulse width modulation (PWM) control with a maximum duty ratio of 88.5%. It features timer latch short-circuit protection, under-voltage lockout, and current limit functions. The component is housed in an 8-SON package measuring 2.9x2.8 mm and is rated for operation between -40°C and +85°C.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, PWM controller, UVLO, and timer latch short-circuit protection circuits.
• Supports high-frequency operation up to 1.133 MHz for compact external component sizing.
• Enables flexible duty cycle control through external resistor connection to the RDuty pin.

Applications

• Power supply systems for LCD displays
• Portable electronic devices operating on low voltage sources

Procurement Notes

Verify the specific suffix HC against the official datasheet to confirm exact electrical characteristics and pin configuration. Confirm RoHS compliance status and lead times directly with the manufacturer or authorized distributors. Ensure the selected package matches the required PCB layout dimensions.

Selection Notes

Select this controller when designing boost converters requiring low minimum operating voltage and high switching frequencies. Consider the 8-SON package size constraints and thermal requirements. Verify that the external inductor and capacitor values align with the 1.133 MHz maximum frequency capability.

Part Context

This component belongs to the S-8337/8338 series of step-up switching regulator controllers. The S-8338 variant specifically allows duty ratio adjustment via an external resistor, distinguishing it from fixed-duty counterparts. It is designed for applications demanding efficient power conversion from low-voltage sources.

Replacement Considerations

S-8338ABEC-T8T1G

FAQ

How is the maximum duty ratio controlled in the S-8338 series?

The maximum duty ratio is controlled by connecting a resistor to the RDuty pin.

What is the maximum internal oscillation frequency supported?

The internal oscillation frequency can be set up to 1.133 MHz via the resistor connected to the ROSC pin.