S-8338ABDB-T8T1G

Overview

The S-8338ABDB-T8T1G is a CMOS step-up switching regulator controller from the S-8338 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 features a fixed maximum duty ratio of 88% and supports internal oscillation frequencies up to 1.133 MHz via an external resistor. Integrated protections include under-voltage lockout and timer latch short-circuit protection. It is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Features timer latch short-circuit protection and under-voltage lockout circuits for enhanced reliability.
• Allows adjustable phase compensation and gain via external components connected to the CC pin.

Applications

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

Procurement Notes

Verify the specific suffix 'T8T1G' corresponds to the TSSOP-8 package and reel packaging configuration as documented in the official datasheet. Confirm that the fixed 88% duty ratio characteristic aligns with system requirements, distinguishing it from the adjustable duty cycle variants found in the S-8337 series. Ensure compatibility with the specified 1.8 V minimum operating voltage.

Selection Notes

Select this component when a fixed maximum duty ratio is required for the boost converter topology. The S-8338 series is distinct from the S-8337 series, which offers adjustable duty ratios via an external resistor. Consider the 1.133 MHz maximum frequency capability for minimizing passive component size while maintaining stability through external phase compensation adjustments.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8338 variant specifically differentiates itself by having a fixed maximum duty ratio, whereas the S-8337 series allows for duty ratio adjustment. Both series share similar core architectures including UVLO and short-circuit protection mechanisms.

Replacement Considerations

S-8338ABEC-T8T1G: Same series, same package, fixed duty ratio.

FAQ

How is the oscillation frequency determined?

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

What distinguishes the S-8338 series from the S-8337 series?

The S-8338 series has a fixed maximum duty ratio (88%), while the S-8337 series allows the maximum duty ratio to be controlled by an external resistor.