S-8338ABHB-T8T1G

Overview

The S-8338ABHB-T8T1G is a CMOS step-up switching regulator controller from the S-8338 series, manufactured by ABLIC Inc. It operates with a minimum input voltage of 1.8 V and supports an internal oscillation frequency up to 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 includes an under-voltage lockout circuit and a timer latch short-circuit protection circuit. The component is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller within a single CMOS chip.
• Provides built-in under-voltage lockout and timer latch short-circuit protection for enhanced reliability.
• Allows flexible phase compensation and gain adjustment through external resistor and capacitor connections.

Applications

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

Procurement Notes

Verify the specific suffix against official ABLIC documentation to confirm exact electrical characteristics and package type. Ensure compatibility with required operating temperatures and input voltage ranges before integration. Confirm RoHS compliance status and manufacturing origin through authorized channels.

Selection Notes

Select this controller for applications requiring high-frequency operation and low minimum input voltage. Consider the fixed duty ratio limitation compared to other series variants. Evaluate external component requirements for frequency setting and phase compensation to ensure system stability.

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 with a fixed maximum duty ratio, whereas the S-8337 series allows adjustable duty ratios via external resistors. Both share similar core architectures and protection features.

Replacement Considerations

The S-8337ABHB-T8T1G serves as a functional substitute within the same series, offering adjustable maximum duty ratio capabilities instead of the fixed configuration found in the S-8338 model. Verify pin compatibility and external component adjustments when substituting.