S-8337ACDC-T8T1G

Overview

The S-8337ACDC-T8T1G is a CMOS step-up switching regulator controller from ABLIC Inc., designed for low-voltage portable systems. It operates within a supply voltage range of 1.8 V to 6 V and supports an internal oscillation frequency adjustable up to 1.134 MHz via the ROSC pin. The device utilizes pulse-width modulation (PWM) control with a maximum duty ratio of 0.89, configurable through external components connected to the RDuty pin. Phase compensation and gain are adjustable via the CC pin to ensure stability. It features under-voltage lockout and timer latch short-circuit protection, housed in an 8-TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, PWM controller, UVLO, and short-circuit protection circuits.
• Allows external adjustment of oscillation frequency up to 1.2 MHz and maximum PWM duty ratio.
• Supports phase compensation and gain tuning for stable operation across varying load conditions.

Applications

• Power supply for LCD displays
• Portable electronic systems operating on low voltage
• Step-up DC-DC converter designs requiring high-frequency operation

Procurement Notes

Verify the complete part number including suffixes such as T8T1G to confirm the specific package type and reel quantity. Confirm RoHS compliance status and REACH registration details prior to integration. Check for any Product Change Notifications (PCN) regarding material or manufacturing process updates. Ensure design compatibility with the specified operating temperature range of -40°C to 85°C.

Selection Notes

Select this component when designing boost converters requiring input voltages as low as 1.8 V. Choose based on the need for externally programmable switching frequency and duty cycle limits. Consider the 8-TSSOP package for surface-mount applications where space efficiency is required. Evaluate the need for adjustable phase compensation to meet specific transient response requirements.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8337 variant specifically allows user-defined maximum duty ratios, distinguishing it from the fixed-duty S-8338 series. Both series share core architecture optimized for low-voltage, battery-powered applications.

Replacement Considerations

Direct substitutes within the same family include S-8337AAEB-T8T1G and S-8337ABEC-T8T1G, which share identical functional specifications and pinouts. Verify that alternative suffixes match the required packaging and environmental compliance standards before substitution.