S-8337AAAC-T8T1G

Overview

The S-8337AAAC-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 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. Maximum duty ratio is configurable through an external resistor connected to the RDuty pin. Phase compensation and gain are adjusted using components on the CC pin. It features under-voltage lockout and timer latch short-circuit protection, packaged in an 8-TSSOP format.

Feature Summary

• Integrates reference voltage circuit, oscillator, error amplifier, PWM controller, UVLO, and short-circuit protection.
• Allows user-defined maximum duty ratio adjustment via external resistor connection.
• Supports phase compensation and gain tuning for operation stability.

Applications

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

Procurement Notes

Verify the specific suffix 'AAAC' against official datasheets to confirm exact electrical characteristics, as variations exist within the S-8337 family. Confirm package type matches 8-TSSOP requirements. Check RoHS compliance status directly with the manufacturer documentation before procurement.

Selection Notes

Select this component when designing boost converters requiring flexible duty cycle control and high-frequency operation. Ensure external components for ROSC, RDuty, and CC pins are chosen to meet specific frequency and stability targets. Verify input voltage compatibility with the 1.8 V minimum requirement.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. The S-8337 variant specifically allows for adjustable maximum duty ratios, distinguishing it from the fixed-duty S-8338 series. Both share similar core architectures optimized for low-voltage portable applications.

FAQ

How is the oscillation frequency determined?

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

What protection circuits are included?

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