S-8337ACAB-T8T1G

Overview

The S-8337ACAB-T8T1G is a CMOS step-up switching regulator controller from the S-8337 series, manufactured 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 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 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.
• Features externally adjustable switching frequency and maximum duty ratio.

Applications

• Power supply for LCD panels
• Portable systems requiring low voltage operation

Procurement Notes

Verify the specific suffix ACAB against official ABLIC documentation to confirm exact electrical characteristics and availability status. Confirm RoHS compliance details and ensure the TSSOP-8 package matches design requirements. Check for any product change notifications or obsolescence notices prior to finalizing procurement orders.

Selection Notes

Select this component when designing boost converters requiring flexible frequency and duty cycle adjustments. Ensure external components for the ROSC, RDuty, and CC pins are chosen to meet stability and transient response needs. Verify that the operating temperature range of -40°C to 85°C aligns with the target application environment.

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 optimized for low-voltage step-up applications.

Replacement Considerations

S-8337AAGB-T8T1G

FAQ

How is the switching frequency determined?

The internal oscillation frequency can be set up to 1.133 MHz by connecting a resistor to the ROSC pin.

What protection features are included?

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