S-8338ACBB-T8T1G

Overview

The S-8338ACBB-T8T1G is a CMOS step-up switching regulator controller from the S-8338 series by ABLIC Inc. It operates within a supply 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 on the ROSC pin, with a typical operating range of 257.4 kHz to 1.134 MHz. The device features a fixed maximum duty ratio of 88.5% and supports phase compensation adjustments through external components connected to the CC pin. It is housed in an 8-TSSOP package.

Feature Summary

• Integrates under voltage lockout (UVLO) and timer latch short-circuit protection circuits for enhanced reliability.
• Allows flexible configuration of oscillation frequency and phase compensation using external resistors and capacitors.
• Provides a fixed maximum duty ratio to ensure stable boost operation across varying load conditions.

Applications

• Power supply systems for LCD displays
• Portable electronic devices requiring low-voltage operation
• General-purpose DC-DC step-up converter designs

Procurement Notes

Verify the specific suffix T8T1G corresponds to the 8-TSSOP package and reel packaging format required for your assembly process. Confirm that the fixed duty ratio characteristic aligns with your output voltage requirements, as this variant does not offer external duty cycle adjustment unlike other series members. Ensure component availability matches production timelines.

Selection Notes

Select this controller when a fixed duty ratio is acceptable for the target application. Choose the S-8338 series over the S-8337 if external duty ratio control is unnecessary. Consider the 8-TSSOP package for surface-mount applications requiring a compact footprint. Verify that the input voltage range of 1.8 V to 6 V covers the system's operational requirements.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8338 series is distinguished by its fixed maximum duty ratio, whereas the S-8337 series allows for variable duty ratio control via an external resistor. Both series share similar core architectures including reference voltage, oscillator, and error amplifier circuits.

Replacement Considerations

S-8338ABEC-T8T1G

FAQ

How is the oscillation frequency adjusted?

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.