S-8337ABHB-T8T1G

Overview

The S-8337ABHB-T8T1G is a CMOS step-up switching regulator controller from the S-8337 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 the ROSC pin. The device utilizes pulse width modulation (PWM) control with a maximum duty ratio adjustable through an external resistor on the RDuty pin. Phase compensation and gain are configurable using components connected to the CC pin. It features under-voltage lockout and timer latch short-circuit protection, packaged in an 8-TSSOP format.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, PWM controller, UVLO, and short-circuit protection circuits.
• Enables flexible frequency setting up to 1.133 MHz via an external resistor on the ROSC pin.
• Allows adjustment of maximum PWM duty ratio through an external resistor connected to the RDuty pin.
• Supports customizable phase compensation and gain values via external components on the CC pin.

Applications

• Power supply for LCD displays
• Portable systems operating on low voltage

Procurement Notes

Verify the specific suffix configuration against official ABLIC documentation to ensure correct electrical parameters. Confirm package type and RoHS compliance status prior to ordering. Check current availability and lead times directly with authorized distributors as stock levels fluctuate. Ensure design-in compatibility with required input voltage ranges and switching frequencies.

Selection Notes

Select this component when designing boost converter applications requiring low minimum operating voltage down to 1.8 V. Consider its adjustable frequency and duty ratio capabilities for optimizing efficiency and size in portable electronics. Verify that the 8-TSSOP package fits the PCB layout constraints. Ensure external component selection aligns with the specified ROSC, RDuty, and CC pin requirements for stable operation.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. The S-8337 variant specifically offers adjustable maximum duty ratios, distinguishing it from the fixed-duty S-8338 series. Both series share core features like low-voltage operation and integrated protection circuits, targeting efficient power management in compact electronic devices.

Replacement Considerations

S-8337AAGB-T8T1G and S-8337ACGB-T8T1G are documented variants within the same series offering similar step-up controller functionality. Verify specific parameter differences such as duty ratio settings or factory pack quantities before substitution. Consult official datasheets for detailed comparison of electrical characteristics and pin configurations.