S-8337AABC-T8T1G

Overview

The S-8337AABC-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 1.8V to 6V and utilizes pulse width modulation (PWM) control. The device supports an internal oscillation frequency adjustable up to 1.134MHz via an external resistor on the ROSC pin. It features a maximum duty ratio of 0.89, controllable through the RDuty pin, and includes under-voltage lockout (UVLO) and timer latch short-circuit protection. The component is housed in an 8-TSSOP package with a width of 4.40mm.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation
• Features programmable maximum duty ratio controlled by external resistance connected to the RDuty pin
• Includes built-in under-voltage lockout and timer latch short-circuit protection circuits
• Supports phase compensation and gain adjustment via external resistor and capacitor values

Applications

• Power supply units for LCD displays
• Portable electronic systems operating on low voltage sources
• Battery-powered devices requiring step-up conversion

Procurement Notes

Verify the specific suffix codes against official datasheets to confirm exact electrical tolerances and factory settings. Confirm RoHS compliance status and REACH registration details prior to integration. Ensure the 8-TSSOP package dimensions match the target PCB footprint requirements. Check for any product change notifications regarding material composition or manufacturing site updates.

Selection Notes

Select this controller when designing boost converters requiring a wide input voltage range starting at 1.8V. The adjustable frequency and duty ratio allow optimization for specific inductor sizes and efficiency targets. Consider the thermal performance of the TSSOP-8 package for the intended power dissipation levels. Verify that the external component selection aligns with the specified phase compensation requirements for stability.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for applications demanding low minimum operating voltages and compact form factors. It shares core architectural similarities with the S-8338 series, though duty ratio control methods may differ between variants.

Replacement Considerations

Consult official substitution lists for verified equivalents. Cross-reference pinouts and electrical specifications carefully before replacing.