S-8337ACHC-P8T1G

Overview

The S-8337ACHC-P8T1G is a CMOS step-up switching regulator controller manufactured by ABLIC Inc. It operates within a supply voltage range of 1.8 V to 6 V and utilizes PWM control with an internal oscillation frequency adjustable up to 1.133 MHz via an external resistor on the ROSC pin. The device features a maximum duty ratio controlled by an external resistor connected to the RDuty pin, allowing for flexible output regulation. Phase compensation and gain are adjusted using components connected to 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 in a single CMOS chip.
• 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 panels
• Portable electronic systems requiring low input voltage
• Step-up DC-DC converter designs

Procurement Notes

Verify the specific suffix 'P8T1G' corresponds to the 8-SON package variant when sourcing. Confirm RoHS compliance status through official documentation. Ensure ordering quantities align with manufacturer standard packaging requirements. Cross-reference the exact part number against the latest datasheet revision to confirm availability and design recommendations.

Selection Notes

Select this component for applications requiring a wide input voltage range and adjustable switching frequency. The external setting of maximum duty ratio and phase compensation allows customization for various load conditions. Consider the thermal performance and layout requirements associated with the 8-SON package for high-frequency operation.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for step-up applications, offering flexibility through external component settings for frequency and duty cycle. It is distinct from integrated switching regulators as it primarily controls the external power switch.

FAQ

How is the switching frequency determined?

The internal oscillation frequency is set externally by connecting a resistor to the ROSC pin, allowing adjustment up to 1.133 MHz.

What protection features are included?

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