S-8337AAIA-P8T1G

Overview

The S-8337AAIA-P8T1G 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 supports a maximum oscillation frequency of 1.133 MHz via the ROSC pin. The device utilizes pulse width modulation (PWM) control with a maximum duty ratio adjustable through the RDuty pin. It features under-voltage lockout (UVLO) and timer latch short-circuit protection circuits. The component is housed in an 8-SON package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Supports low-voltage operation starting at 1.8 V, suitable for portable systems.
• Includes built-in under-voltage lockout and short-circuit protection mechanisms.

Applications

• Power supply for LCD modules
• Portable electronic devices requiring low-voltage operation
• General-purpose step-up DC-DC converter designs

Procurement Notes

Verify the specific suffix 'P8T1G' against the manufacturer's official documentation to confirm the exact packaging type and tape-and-reel specifications. Ensure that the ordering information aligns with current production status, as some variants may be marked as not recommended for new designs due to minimum order quantity constraints or lifecycle changes.

Selection Notes

Select this component when designing boost converters requiring high-frequency operation up to 1.133 MHz. The external resistor on the RDuty pin allows customization of the maximum duty cycle, offering flexibility compared to fixed-duty variants. Consider the 8-SON package dimensions for PCB layout constraints and ensure compatibility with the required operating temperature range of -40°C to 85°C.

Part Context

This part belongs to the S-8337/8338 family of high-frequency PWM control switching regulator controllers. Unlike the S-8338 series which has a fixed maximum duty ratio, the S-8337 series allows user adjustment of the duty ratio via an external resistor. This provides greater design flexibility for various output voltage requirements while maintaining compact size and low input voltage capability.

Replacement Considerations

Direct substitutes include other S-8337 series variants such as S-8337AAGB-T8T1G or S-8337AAEB-T8T1G, provided the package type and electrical parameters match the design requirements. Verify that any replacement maintains the same input voltage range and frequency capabilities.