S-8337ABIB-T8T1G

Overview

The S-8337ABIB-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 internal oscillation frequency is adjustable up to 1.133 MHz via an external resistor connected to the ROSC pin. The maximum duty ratio is configurable through an external resistor on the RDuty pin. Phase compensation and gain are adjusted using components connected to the CC pin. The device is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, PWM controller, UVLO, and short-circuit protection.
• Supports low-voltage operation starting at 1.8 V for portable applications.
• Allows external adjustment of oscillation frequency, maximum duty ratio, and phase compensation.

Applications

• Power supply for LCD modules
• Portable electronic systems operating on low voltage

Procurement Notes

Verify the specific suffix ABIB against official datasheets to confirm exact electrical characteristics and availability status. Confirm RoHS compliance and packaging details with the manufacturer or authorized distributors before procurement.

Selection Notes

Select this component when designing boost converters requiring low minimum operating voltage and high-frequency PWM control. Ensure external components match the required frequency and duty cycle settings defined by the ROSC and RDuty pins.

Part Context

This part belongs to the S-8337/8338 series of high-frequency step-up switching regulator controllers. The series is designed for applications needing efficient power management in compact, battery-operated devices with low voltage requirements.

Replacement Considerations

Check for direct substitutes within the S-8337 series or compatible ABLIC stepping regulators. Verify pin compatibility and electrical specifications before considering alternative manufacturers.

FAQ

How is the oscillation frequency set?

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.