S-8337ACEA-P8T1G

Overview

The S-8337ACEA-P8T1G is a CMOS step-up switching regulator controller from the S-8337 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 1.133 MHz via an external resistor on the ROSC pin. It features a timer latch short-circuit protection circuit and under-voltage lockout (UVLO). The component is housed in an 8-SMD, flat lead package (SON type), specifically identified as 8-SON(A)(2.9x2.8), and is designed for low-voltage portable applications.

Feature Summary

• Integrates a reference voltage circuit, oscillator, error amplifier, and PWM controller within a single CMOS chip.
• Features a timer latch short-circuit protection circuit for enhanced system reliability.
• Allows adjustment of maximum duty ratio through an external resistor connected to the RDuty pin.
• Supports phase compensation and gain value adjustments via external components connected to the CC pin.

Applications

• Power supply circuits for LCD displays
• Portable electronic systems operating on low voltage
• Battery-powered devices requiring step-up regulation

Procurement Notes

Verify the specific suffix P8T1G corresponds to the 8-SON(A) package variant rather than TSSOP. Confirm RoHS compliance status with the manufacturer, as some datasheet versions list details without explicit confirmation. Ensure the ordering quantity aligns with standard reel packaging requirements when sourcing this component.

Selection Notes

Select this controller when a low minimum operating voltage of 1.8 V is required for battery-powered designs. Choose the S-8337 variant over the S-8338 if external adjustment of the maximum duty ratio is necessary for specific output voltage configurations. Consider the 8-SON package size for compact board layouts compared to larger TSSOP options.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is characterized by its ability to operate at frequencies up to 1.2 MHz, allowing for smaller passive components. The S-8337 model specifically distinguishes itself by offering user-adjustable duty ratios, whereas the S-8338 model has a fixed maximum duty ratio.

Replacement Considerations

The S-8338ABEC-T8T1G serves as a functional substitute within the same series, though it features a fixed maximum duty ratio instead of the adjustable configuration found in the S-8337 series. Verify that the fixed duty ratio meets the design requirements before substitution.