S-8337ABFC-T8T1G

Overview

The S-8337ABFC-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 supports a switching frequency up to 1.134 MHz. The device utilizes pulse width modulation (PWM) control with a maximum duty ratio of 0.89. It is housed in an 8-TSSOP package and functions as a positive output boost DC-DC converter. The component includes internal circuits for reference voltage, error amplification, and under-voltage lockout.

Feature Summary

• Integrates timer latch short-circuit protection circuit for enhanced reliability
• Features adjustable internal oscillation frequency via external resistor connection
• Allows customization of maximum PWM duty ratio through external components

Applications

• Power supply units for LCD displays
• Portable electronic systems operating on low voltage sources
• Step-up DC-DC conversion in battery-powered devices

Procurement Notes

Verify the specific suffix T8T1G corresponds to the 8-TSSOP reel packaging configuration. Confirm RoHS compliance status against the latest manufacturer documentation. Ensure the part number matches the exact functional variant required for the design, as suffixes may indicate minor manufacturing or material changes rather than functional differences.

Selection Notes

Select this controller when a low minimum operating voltage of 1.8 V is required for single-cell battery applications. Choose the S-8337 variant over the S-8338 if external adjustment of the maximum duty ratio is necessary for specific output voltage requirements. Ensure the application environment stays within the -40°C to 85°C temperature range.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for portable systems requiring efficient power management from low-voltage sources. The S-8337 model specifically allows for flexible duty cycle configuration compared to fixed-duty variants in the same family.

Replacement Considerations

S-8337ACCC-T8T1G

FAQ

How is the switching frequency determined?

The internal oscillation frequency can be set up to 1.133 MHz by connecting a resistor to the ROSC pin.

What protection features are included?

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