S-8337AACB-T8T1G

Overview

The S-8337AACB-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 supports an internal oscillation frequency up to 1.133 MHz via an external resistor on the ROSC pin. The device utilizes PWM control with a maximum duty ratio adjustable through an external resistor connected to the RDuty pin. Phase compensation and gain are configurable using external components on the CC pin. It features under-voltage lockout (UVLO) and timer latch short-circuit protection, packaged in an 8-TSSOP surface-mount package.

Feature Summary

• Supports low-voltage operation starting at 1.8 V for portable systems
• Features adjustable internal oscillation frequency up to 1.133 MHz
• Includes programmable maximum duty ratio via external resistor
• Integrates UVLO and timer latch short-circuit protection

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 AACB against the official datasheet to confirm exact electrical characteristics, as variations exist within the S-8337 family. Confirm RoHS compliance status and check for Product Change Notifications (PCN) regarding material or manufacturing updates before finalizing procurement specifications.

Selection Notes

Select this component when designing boost converters requiring adjustable switching frequencies and duty cycles. Ensure external resistors for ROSC and RDuty pins are chosen to meet specific frequency and duty ratio requirements. Verify that the 8-TSSOP package fits the PCB layout constraints and thermal management needs of the target application.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. The S-8337 variant distinguishes itself from the S-8338 by offering adjustable maximum duty ratios, whereas the S-8338 fixes this parameter. Both share similar core architectures including reference voltage circuits, error amplifiers, and protection mechanisms.

Replacement Considerations

Consult the manufacturer's datasheet for direct cross-references. Other variants within the S-8337 series may serve as functional substitutes if their specific suffix parameters align with the design requirements.