S-8337ABCA-T8T1G

Overview

The S-8337ABCA-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 internal oscillation frequency is adjustable up to 1.133 MHz via an external resistor on the ROSC pin. The 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. The device includes under-voltage lockout and timer latch short-circuit protection circuits.

Feature Summary

• Configurable PWM maximum duty ratio via external resistor
• Adjustable internal oscillation frequency up to 1.133 MHz
• Integrated under-voltage lockout and short-circuit protection

Applications

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

Procurement Notes

Verify the specific suffix codes against the official datasheet to confirm electrical characteristics such as output configuration and package type. Ensure compatibility with required input voltage ranges and switching frequencies. Confirm RoHS compliance status and check for any product change notifications or obsolescence notices prior to procurement.

Selection Notes

Select this component when designing boost converters requiring flexible duty cycle control and high-frequency operation. It is suitable for applications needing a wide input voltage range starting from 1.8 V. Consider the need for external resistors to set frequency and duty ratio. Evaluate thermal performance and stability requirements based on the phase compensation adjustments available via the CC pin.

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 user-defined maximum duty ratios, distinguishing it from the fixed-duty S-8338 series. Both share similar core architectures including reference voltage circuits, error amplifiers, and protection features.

FAQ

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

The maximum duty ratio is controlled by the value of the external resistor connected to the RDuty pin.

What is the minimum operating voltage for this controller?

The minimum operating voltage is 1.8 V.