S-8337ABIA-T8T1U

Overview

The S-8337ABIA-T8T1U is a CMOS step-up switching regulator controller from the S-8337 series, manufactured by ABLIC Inc. It operates within an input voltage range of 1.8 V to 6 V and utilizes a TSSOP-8 package. The device features a high-frequency PWM control scheme with an internal oscillation frequency adjustable up to 1.133 MHz via an external resistor on the ROSC pin. Maximum duty ratio is configurable through the RDuty pin. It includes under-voltage lockout (UVLO) and timer latch short-circuit protection circuits for enhanced reliability.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller in a single CMOS chip
• Supports low-voltage operation starting at 1.8 V for portable system applications
• Features programmable switching frequency and maximum duty ratio via external components
• Includes built-in under-voltage lockout and short-circuit protection mechanisms

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 'T8T1U' against official ABLIC documentation to confirm packaging and tape specifications. Confirm RoHS compliance status and lead times directly with the manufacturer or authorized distributors. Ensure the ordering quantity aligns with standard factory pack requirements. Cross-reference the datasheet revision history for any recent design changes or material updates.

Selection Notes

Select this component when a boost topology controller is required for low-input voltage applications. The adjustable frequency allows optimization for efficiency versus component size. Verify that the external inductor and capacitor values support the desired output current and voltage levels. Consider the thermal performance within the TSSOP-8 package for the intended power dissipation.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. The S-8337 variant distinguishes itself from the S-8338 by allowing user-defined maximum duty ratios, whereas the S-8338 fixes this parameter. Both share similar core architectures including UVLO and protection circuits.

Replacement Considerations

Direct substitutes within the same family include S-8337ACIB-T8T1G and S-8337AAFC-T8T1G. These parts share identical functional characteristics and pinouts but may differ in packaging suffixes or manufacturing revisions. Verify electrical parameters and package dimensions before substitution.