S-8337AAIB-T8T1G

Overview

The S-8337AAIB-T8T1G is a CMOS step-up switching regulator controller from the S-8337 series 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 internal oscillation frequency is adjustable up to 1.133 MHz via an external resistor connected to the ROSC pin. The maximum duty ratio is configurable through an external resistor on the RDuty pin, while phase compensation is adjusted via components on the CC pin. The device is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, PWM controller, UVLO, and short-circuit protection
• Supports low-voltage operation starting at 1.8 V for portable applications
• Allows external adjustment of switching frequency, maximum duty ratio, and phase compensation

Applications

• Power supply for LCD modules
• Portable systems operating on low voltage
• Step-up DC-DC converter designs

Procurement Notes

Verify the specific suffix 'AAIB' against the official datasheet to confirm exact electrical characteristics, as variations exist within the S-8337 family. Confirm the package type matches the required PCB footprint. Ensure compliance with RoHS standards if applicable to the manufacturing process. Check for any product change notifications that may affect material composition or performance specifications.

Selection Notes

Select this component when designing boost converters requiring high-frequency operation up to 1.133 MHz. It is suitable for applications needing flexible duty cycle control via external resistors. Consider the 1.8 V minimum operating voltage for battery-powered devices. Verify that the external component values for frequency and compensation meet stability requirements.

Part Context

This part belongs to the S-8337/8338 Series, which are CMOS step-up switching regulator controllers. The series is designed for high-frequency PWM control to minimize external component size. The S-8337 variant specifically allows user-defined maximum duty ratios, unlike the fixed-ratio S-8338. These controllers are intended for efficient power management in compact electronic devices.

Replacement Considerations

The S-8338ABEC-T8T1G is a related controller in the same series but features a fixed maximum duty ratio of 88%. Substitution requires verifying if the fixed duty cycle meets the application's output voltage requirements. Other S-8337 variants with different suffixes may offer adjusted electrical parameters.