S-8338ACDB-T8T1G

Overview

The S-8338ACDB-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 supports a maximum oscillation frequency of 1.133 MHz via an external resistor on the ROSC pin. The device features a fixed maximum duty ratio of 88% and utilizes pulse width modulation (PWM) control. It is housed in an 8-pin TSSOP package and includes built-in under-voltage lockout and timer latch short-circuit protection circuits for enhanced reliability.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller within a single CMOS chip
• Features timer latch short-circuit protection circuit for robust fault handling
• Supports adjustable phase compensation and gain via external RC components connected to the CC pin

Applications

• Power supply units for LCD panels
• Portable electronic systems requiring low voltage operation
• Step-up DC-DC converter designs

Procurement Notes

Verify the specific suffix ACDB against official ABLIC documentation to confirm pin compatibility and electrical characteristics relative to other S-8338 variants. Ensure that the required operating temperature range and package dimensions align with the target PCB layout constraints before finalizing component selection.

Selection Notes

Select this controller when a fixed maximum duty ratio is preferred over adjustable limits found in the S-8337 series. Consider the 1.8 V minimum operating voltage for battery-powered applications. Verify that the external component values for frequency setting and phase compensation meet stability requirements for the specific load conditions.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8338 variant distinguishes itself by maintaining a fixed maximum duty ratio, whereas the S-8337 allows adjustment through an external resistor. Both series share similar internal architectures including UVLO and short-circuit protection mechanisms.

Replacement Considerations

S-8338ABEB-T8T1G and S-8338ACCB-T8T1G are documented members of the same S-8338 series family sharing identical core functional specifications and package types.