S-8337ABCB-T8T1G

Overview

The S-8337ABCB-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 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 maximum duty ratio is configurable through an external resistor connected to the RDuty pin, allowing for flexible output voltage regulation in low-voltage portable applications.

Feature Summary

• Integrates a reference voltage circuit, oscillator, error amplifier, and PWM controller for efficient step-up voltage conversion.
• Includes a timer latch short-circuit protection circuit and under-voltage lockout (UVLO) for enhanced system reliability.
• Allows adjustment of the maximum duty ratio via an external resistor connected to the RDuty pin.

Applications

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

Procurement Notes

Verify the specific suffix against official ABLIC documentation to confirm exact electrical characteristics and package details. Confirm RoHS compliance status and ensure the component meets REACH regulations for your target market. Check for any Product Change Notifications (PCN) related to solder plating or material composition updates before finalizing procurement specifications.

Selection Notes

Select this controller when designing boost converters requiring a wide input voltage range starting at 1.8 V. The adjustable oscillation frequency allows optimization for efficiency and component size. Ensure external components match the required frequency and duty ratio settings defined by the ROSC and RDuty pins for stable operation.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for low-voltage applications, distinguishing itself with a minimum operating voltage of 1.8 V. Unlike the S-8338 variant which has a fixed maximum duty ratio, the S-8337 series offers flexibility through external resistor configuration for duty cycle control.

Replacement Considerations

Direct replacements within the same family include other S-8337 variants such as S-8337AAGB-T8T1G or S-8337ACDC-T8T1G. Verify that the substitute part number matches the required input voltage range, package type (TSSOP-8), and specific functional suffixes before substitution.