S-8337ACBA-T8T1G

Overview

The S-8337ACBA-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 1.134 MHz via an external resistor connected to the ROSC pin. The maximum duty ratio is configurable through an external resistor on the RDuty pin. Phase compensation and gain are adjusted using components connected to the CC pin. The device 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
• Supports low-voltage operation starting at 1.8 V for portable systems
• Allows external adjustment of oscillation frequency up to 1.134 MHz
• Enables customizable maximum duty ratio via external resistor

Applications

• Power supply for LCD panels
• Portable electronic systems operating on low voltage
• Step-up DC-DC converter designs requiring high-frequency PWM control

Procurement Notes

Verify the specific suffix ACBA against official datasheets to confirm exact electrical tolerances and package variations. Confirm RoHS compliance status and REACH registration details with the manufacturer. Check for any Product Change Notifications (PCN) regarding material or marking updates before finalizing procurement specifications.

Selection Notes

Select this component when designing boost converters requiring adjustable switching frequencies above 250 kHz. Ensure external components for the ROSC, RDuty, and CC pins are chosen to meet stability requirements. Verify that the input voltage remains within the 1.8 V to 6 V operational range for reliable performance.

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 user-defined maximum duty ratios, distinguishing it from the fixed-duty S-8338 series. Both share similar internal architectures optimized for low-voltage step-up applications.

Replacement Considerations

S-8337ABEC-T8T1G and S-8337AAFC-T8T1G are functionally equivalent parts within the same series. Verify pin compatibility and external component values when substituting.