S-8337AAHC-P8T1G

Overview

The S-8337AAHC-P8T1G is a CMOS step-up switching regulator controller from the S-8337 series, manufactured by ABLIC Inc. It operates within a supply voltage range of 1.8 V to 6 V and utilizes pulse width modulation (PWM) control. The device supports an internal oscillation frequency adjustable up to 1.134 MHz via an external resistor. It features a maximum duty ratio of 0.89 and includes under-voltage lockout and short-circuit protection circuits. The component is housed in an 8-SON package with dimensions of 2.9x2.8 mm.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Includes timer latch short-circuit protection and under-voltage lockout circuits for enhanced system reliability.
• Allows external adjustment of oscillation frequency and maximum duty ratio through dedicated pins.

Applications

• Power supply for LCD displays
• Portable systems operating on low voltage
• DC-DC boost converter designs

Procurement Notes

Verify the specific suffix P8T1G corresponds to the 8-SON(A) package and reel packaging configuration. Confirm RoHS compliance status as indicated in official documentation. Ensure the component meets the required operating temperature range of -40°C to 85°C for the intended application environment before finalizing procurement.

Selection Notes

Select this controller when designing boost converters requiring low input voltage operation down to 1.8 V. The adjustable frequency capability allows optimization for external component size versus efficiency trade-offs. Consider the fixed maximum duty ratio characteristic when determining the required output voltage range relative to the input supply.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8337 variant specifically distinguishes itself from the S-8338 series by offering externally adjustable maximum duty ratios, whereas the S-8338 series maintains a fixed maximum duty ratio. Both share similar core architectures and protection features.

Replacement Considerations

S-8337ACHB-T8T1G

FAQ

How is the oscillation frequency adjusted?

The internal oscillation frequency can be set up to 1.134 MHz by connecting a resistor to the ROSC pin.

What protection features are included?

The device incorporates an under-voltage lockout circuit (UVLO) and a timer latch short-circuit protection circuit.