S-8337AAGA-T8T1G

Overview

The S-8337AAGA-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 components on the CC pin. It features under-voltage lockout (UVLO) and timer latch short-circuit protection, packaged in an 8-TSSOP format.

Feature Summary

• Adjustable maximum duty ratio controlled by external resistor
• Configurable phase compensation and gain via external components
• Integrated under-voltage lockout circuit
• Timer latch short-circuit protection

Applications

• Power supply for LCD panels
• Portable systems operating on low voltage
• Step-up DC-DC converter designs

Procurement Notes

Verify the specific suffix T8T1G corresponds to the 8-TSSOP package and reel packaging configuration. Confirm RoHS compliance status as detailed in the manufacturer's documentation. Ensure the ordering part number matches the exact electrical characteristics required for the design, particularly regarding the fixed parameters inherent to this specific model variant.

Selection Notes

Select this component when an adjustable maximum duty ratio is required, distinguishing it from the S-8338 series which has a fixed duty ratio. Consider the need for external resistors to set the oscillation frequency and duty cycle limits. Evaluate the requirement for configurable phase compensation to ensure stability in the target application circuit.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8337 series is characterized by its externally adjustable maximum duty ratio, whereas the S-8338 series features a fixed maximum duty ratio. Both share similar core architectures including reference voltage circuits, error amplifiers, and protection mechanisms.

Replacement Considerations

S-8337ABEC-T8T1G

FAQ

How is the maximum duty ratio determined for the S-8337AAGA-T8T1G?

The maximum duty ratio is controlled by the value of the external resistor connected to the RDuty pin.

What protection features are included in this controller?

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