S-8337ACCC-T8T1G

Overview

The S-8337ACCC-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 adjustable up to 1.133 MHz via an external resistor. The device features pulse-width modulation (PWM) control with a maximum duty ratio of 0.89, configurable through an external resistor. It includes under-voltage lockout and timer latch short-circuit protection circuits. The component is housed in an 8-TSSOP package and is designed for portable systems requiring low-voltage operation.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation
• Features timer latch short-circuit protection circuit for enhanced system safety
• Allows external adjustment of oscillation frequency and maximum duty ratio via resistors
• Includes under-voltage lockout circuit to ensure stable operation at low input voltages

Applications

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

Procurement Notes

Verify the specific suffix T8T1G corresponds to the 8-TSSOP reel packaging configuration. Confirm RoHS compliance status as detailed in the manufacturer's environmental statement. Check for any product change notifications regarding solder plating or material composition updates prior to procurement.

Selection Notes

Select this component when designing boost converters requiring a wide input voltage range starting from 1.8 V. Ensure external components support the desired switching frequency up to 1.133 MHz. Verify that the application environment falls within the specified -40°C to 85°C operating temperature range for reliable performance.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is characterized by its CMOS technology and low minimum operating voltage, making it suitable for applications where power efficiency and compact design are critical. It serves as a core controller for external power switches in DC-DC conversion circuits.

Replacement Considerations

S-8337AAEB-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 (UVLO) circuit and a timer latch short-circuit protection circuit.

Can the maximum duty ratio be adjusted?

Yes, the maximum duty ratio of the PWM control can be controlled by the resistor connected to the RDuty pin.