S-8337ACBB-T8T1G

Overview

The S-8337ACBB-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 device supports an internal oscillation frequency adjustable up to 1.134 MHz via an external resistor on the ROSC pin. It features a maximum duty ratio controllable through the RDuty pin and includes under-voltage lockout (UVLO) and timer latch short-circuit protection circuits. The component is housed in an 8-TSSOP package with dimensions of 0.173 inches (4.40 mm) width.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Features programmable maximum duty ratio via external resistor connection for flexible output control.
• Includes built-in under-voltage lockout and timer latch short-circuit protection mechanisms.

Applications

• Power supply systems for LCD displays
• Portable electronic devices operating on low voltage
• General DC-DC step-up converter designs

Procurement Notes

Verify the specific suffix code against official documentation to confirm exact factory pack quantity and reel specifications. Confirm RoHS compliance status and REACH restrictions prior to integration. Ensure the 8-TSSOP footprint matches the target PCB layout requirements. Check for any product change notifications or material updates that may affect long-term availability.

Selection Notes

Select this controller when designing boost converters requiring high-frequency operation up to 1.134 MHz. Consider its 1.8 V minimum operating voltage for low-power portable applications. Evaluate the need for adjustable duty ratio versus fixed options found in other series variants. Ensure external components support the required phase compensation and gain adjustments via the CC pin.

Part Context

This component 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 S-8338 series which typically has a fixed maximum duty ratio. Both series share similar core architectures including UVLO and short-circuit protection.

Replacement Considerations

S-8337ABEC-T8T1G and S-8337AAEB-T8T1G are part numbers within the same S-8337 series family sharing identical functional characteristics and package types.