S-8333AAHC-T8T1G

Overview

The S-8333AAHC-T8T1G is a CMOS step-up switching regulator controller 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 1.08 MHz via an external resistor. It includes under-voltage lockout, timer latch short-circuit protection, and adjustable phase compensation. Packaged in an 8-TSSOP surface-mount case, it supports a maximum duty ratio of 0.89 and functions across a temperature range of -40°C to 85°C.

Feature Summary

• Integrates reference voltage, error amplifier, and PWM controller for efficient step-up regulation
• Features built-in under-voltage lockout and timer latch short-circuit protection circuits
• Allows external adjustment of oscillation frequency and maximum duty ratio via resistors
• Supports phase compensation and gain adjustment through external capacitor and resistor connections

Applications

• Power supply systems for portable electronic devices
• LCD panel backlight or bias voltage generation
• Low voltage battery-powered equipment requiring step-up conversion
• General purpose DC-DC converter designs operating above 1.8 V

Procurement Notes

Verify the specific suffix codes against official ABLIC documentation to confirm exact electrical characteristics and pinout compatibility. Ensure that the ordering information matches the required package type and environmental compliance standards. Cross-reference the manufacturer's latest datasheet to validate current production status and recommended design practices before finalizing procurement specifications.

Selection Notes

Select this component when designing boost converters requiring a wide input voltage range starting from 1.8 V. Consider the adjustable frequency capability for optimizing external component sizes. Evaluate the fixed maximum duty ratio constraints against output voltage requirements. Verify thermal performance within the specified operating temperature range for the intended application environment.

Part Context

This part belongs to the S-8333 series of high-frequency PWM control switching regulator controllers. It shares architectural similarities with the S-8337 and S-8338 series but differs in specific control parameters such as maximum duty ratio settings. The series is designed for low-voltage applications where compact size and efficiency are critical.

Replacement Considerations

S-8333AADB-T8T1G

FAQ

How is the oscillation frequency determined?

The internal oscillation frequency is set externally by connecting a resistor to the ROSC pin, allowing frequencies up to 1.08 MHz.

What protection features are included?

The device includes an under-voltage lockout circuit and a timer latch short-circuit protection circuit to ensure safe operation.