S-8337ACIA-T8T1G

Overview

The S-8337ACIA-T8T1G is a CMOS step-up switching regulator controller from the S-8337 series, manufactured by ABLIC Inc. It operates within an input 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 1.133 MHz via an external resistor. It features under-voltage lockout (UVLO) and timer latch short-circuit protection circuits. The component is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation
• Includes under-voltage lockout and timer latch short-circuit protection for enhanced system reliability
• Allows external adjustment of maximum duty ratio via the RDuty pin
• Supports phase compensation and gain adjustment through external RC components

Applications

• Power supply for LCD panels
• Portable systems operating on low voltage
• Battery-powered devices requiring step-up conversion

Procurement Notes

Verify the specific suffix code against the manufacturer's official documentation to confirm exact electrical characteristics and availability status. Confirm RoHS compliance details directly with the supplier or datasheet. Ensure the ordering quantity aligns with the manufacturer's standard packaging requirements before finalizing procurement.

Selection Notes

Select this controller when designing boost converters requiring a wide input voltage range starting at 1.8 V. The adjustable oscillation frequency allows optimization for efficiency and component size. External setting of the maximum duty ratio provides flexibility for various output voltage requirements compared to fixed-duty variants.

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. The S-8337 variant specifically distinguishes itself by allowing user-defined maximum duty ratios, whereas the S-8338 variant typically features a fixed maximum duty ratio.

Replacement Considerations

The S-8338ABEC-T8T1G serves as a functional substitute within the same series, though it features a fixed maximum duty ratio rather than the adjustable configuration found in the S-8337 series.