S-8337AAEA-P8T1G

Overview

The S-8337AAEA-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 supports a maximum oscillation frequency of 1.133 MHz via an external resistor on the ROSC pin. The device utilizes pulse-width modulation (PWM) control with a duty ratio adjustable through an external resistor connected to the RDuty pin. Phase compensation and gain are configurable using components on the CC pin. It features under-voltage lockout (UVLO) and timer latch short-circuit protection, packaged in an 8-SON format.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Supports low-voltage operation starting at 1.8 V, suitable for portable systems.
• Includes under-voltage lockout and timer latch short-circuit protection circuits.

Applications

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

Procurement Notes

Verify the specific suffix P8T1G corresponds to the 8-SON package variant rather than the TSSOP configuration found in other series members. Confirm RoHS compliance status as some older datasheets indicate varying compliance levels. Ensure the ordering quantity aligns with manufacturer standard packaging requirements when sourcing directly.

Selection Notes

Select this component when designing boost converters requiring high-frequency operation up to 1.133 MHz with flexible duty cycle control. It is appropriate for applications needing precise phase compensation adjustments via external RC networks. Consider the 1.8 V minimum operating voltage constraint against the system's power rail availability.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. The S-8337 variant distinguishes itself from the S-8338 by offering adjustable maximum duty ratios, whereas the latter has a fixed limit. Both share core architectural elements like UVLO and short-circuit protection mechanisms.

Replacement Considerations

S-8337AAGB-T8T1G

FAQ

How is the internal oscillation frequency adjusted?

The frequency is set externally via a resistor connected to the ROSC pin, allowing adjustment up to 1.133 MHz.

What protection features are included?

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