S-8337AAFB-T8T1G

Overview

The S-8337AAFB-T8T1G 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. It includes under-voltage lockout (UVLO) and timer latch short-circuit protection circuits. The component is housed in an 8-pin TSSOP 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 panels
• Portable electronic devices requiring low-voltage operation
• General-purpose DC-DC step-up converter designs

Procurement Notes

Verify the specific suffix 'AAFB' against the official ABLIC datasheet to confirm pin compatibility and electrical characteristics, as suffixes often denote specific output configurations or tolerances. Ensure the ordering quantity aligns with the standard reel packaging requirements specified by the manufacturer. Confirm RoHS compliance status through the latest product change notifications.

Selection Notes

Select this controller when designing boost converters that require adjustable switching frequencies up to 1.2 MHz and operate on single-cell lithium batteries or similar low-voltage sources. Consider the external component requirements for setting the oscillation frequency and maximum duty ratio. Evaluate thermal performance within the TSSOP-8 package for the intended application environment.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for applications demanding compact power solutions with low minimum operating voltages. It serves as a core control element in boost converter topologies, distinguishing itself from integrated regulators by providing driver outputs for external power switches.

FAQ

How is the switching frequency determined?

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

What protection features are included?

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