S-8337AAFB-P8T1G

Overview

The S-8337AAFB-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 utilizes pulse width modulation (PWM) control. The device features an internal oscillator with a frequency settable up to 1.133 MHz via an external resistor on the ROSC pin. Maximum duty ratio is adjustable through an external resistor connected to the RDuty pin. Phase compensation and gain are configurable using components on the CC pin. It includes under-voltage lockout and timer latch short-circuit protection circuits.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation
• Features low minimum operating voltage suitable for portable systems
• Includes under-voltage lockout and timer latch short-circuit protection
• Allows external adjustment of oscillation frequency, maximum duty ratio, and phase compensation

Applications

• Power supply for LCD modules
• Portable electronic systems operating on low voltage
• Battery-powered devices requiring step-up conversion

Procurement Notes

Verify the specific suffix P8T1G corresponds to the 8-SON package variant when sourcing. Confirm RoHS compliance status as indicated in official documentation. Ensure compatibility with the required operating temperature range of -40°C to 85°C. Check for any product change notifications regarding material or plating updates before finalizing procurement specifications.

Selection Notes

Select this component when designing boost converters requiring high-frequency operation up to 1.133 MHz. It is appropriate for applications needing adjustable duty cycle control via external resistors. Consider the 8-SON package dimensions for space-constrained layouts. Verify that the external components selected for the ROSC, RDuty, and CC pins meet the stability requirements defined in the datasheet.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8337 series distinguishes itself from the S-8338 series by offering adjustable maximum duty ratios, whereas the S-8338 has a fixed maximum duty ratio. Both share similar core architectures including UVLO and short-circuit protection mechanisms.

Replacement Considerations

The S-8338ABEC-T8T1G serves as a functional alternative within the same series, though it features a fixed maximum duty ratio rather than the adjustable configuration found in the S-8337 series.