S-8338ACHB-T8T1G

Overview

The S-8338ACHB-T8T1G is a CMOS step-up switching regulator controller from the S-8338 series 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 supports an internal oscillation frequency adjustable up to 1.133 MHz via an external resistor. It features a fixed maximum duty ratio of 88% and includes under-voltage lockout and timer latch short-circuit protection circuits. The component 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 circuit for enhanced operational safety.
• Supports phase compensation and gain adjustment through 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 codes against official ABLIC documentation to confirm exact electrical tolerances and temperature ranges. Ensure compatibility with the required output configuration and packaging specifications before procurement. Cross-reference the manufacturer part number with authorized distributor databases to validate current availability and compliance status.

Selection Notes

Select this controller when a wide input voltage range starting at 1.8 V is required for boost applications. The fixed 88% duty ratio distinguishes it from the S-8337 series, which allows variable duty ratio control. Consider the 1.2 MHz high-frequency operation capability for minimizing external passive component sizes in space-constrained designs.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for portable electronics requiring efficient power management from low-voltage sources. The S-8338 variant specifically provides a fixed maximum duty ratio, differing from the S-8337 series which offers adjustable duty ratio control via external resistors.

Replacement Considerations

The S-8337ABEB-T8T1G serves as a functional alternative within the same series, offering similar core architecture but with an externally adjustable maximum duty ratio instead of the fixed 88% found in the S-8338 series. Verify pin compatibility and control loop requirements when substituting.