S-8337AAHC-T8T1G

Overview

The S-8337AAHC-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, housed in an 8-TSSOP 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 T8T1G corresponds to the reel packaging format and confirm RoHS compliance status through official documentation. Ensure the ordering quantity aligns with manufacturer standard pack quantities. Cross-reference the part number against the latest datasheet revision to validate any potential material or design changes noted in product change notifications.

Selection Notes

Select this component when designing boost converters requiring flexible frequency setting and duty cycle control. The S-8337 series allows customization of phase compensation and maximum duty ratio, unlike fixed variants. Consider the 8-TSSOP package constraints and the requirement for external timing and compensation components during schematic design.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8337 variant specifically distinguishes itself by allowing user-defined maximum duty ratios, whereas the S-8338 series fixes this parameter. Both share core architecture including reference circuits, error amplifiers, and protection mechanisms.

FAQ

How is the oscillation frequency determined?

The internal oscillation frequency is set by connecting a resistor to the ROSC pin, allowing adjustment up to 1.133 MHz.

What protection features are included?

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