S-8337AAFA-T8T1G

Overview

The S-8337AAFA-T8T1G is a CMOS step-up switching regulator controller from the S-8337 series, manufactured 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 via an external resistor on the ROSC pin. The device utilizes pulse width modulation (PWM) control with a maximum duty ratio adjustable through an external resistor connected to the RDuty pin. Phase compensation and gain are configurable using external components on the CC pin. It features under-voltage lockout (UVLO) and timer latch short-circuit protection, packaged in an 8-TSSOP.

Feature Summary

• Integrates reference voltage circuit, oscillator, error amplifier, PWM controller, UVLO, and short-circuit protection.
• Allows programmable internal oscillation frequency up to 1.133 MHz via external resistor.
• Enables adjustment of maximum PWM duty ratio through external resistor connection.
• Supports stability tuning via external phase compensation and gain components.

Applications

• Power supply for LCD modules
• Portable systems operating on low voltage

Procurement Notes

Verify the specific suffix 'AAFA' against the official datasheet to confirm exact electrical characteristics and package details. Confirm RoHS compliance status and check for any product change notifications or obsolescence warnings prior to procurement. Ensure ordering quantities align with standard factory packaging requirements.

Selection Notes

Select this component when designing boost converters requiring low minimum operating voltage and high-frequency operation. Consider the availability of external resistors for setting frequency and duty cycle. Evaluate thermal performance within the specified operating temperature range and ensure compatibility with the required output configuration.

Part Context

This part belongs to the S-8337/8338 Series of step-up switching regulator controllers. The series is designed for applications requiring efficient power conversion from low input voltages. The S-8337 variant specifically offers adjustable duty ratios, distinguishing it from the fixed-duty S-8338 series, providing greater flexibility in output voltage regulation.

Replacement Considerations

S-8337ABEC-T8T1G

FAQ

How is the maximum duty ratio controlled in the S-8337AAFA-T8T1G?

The maximum duty ratio of the PWM control is controlled by the resistor connected to the RDuty pin.

What is the minimum operating voltage for this switching regulator?

The minimum operating voltage is as low as 1.8 V.