S-8337AADB-P8T1G

Overview

The S-8337AADB-P8T1G is a CMOS step-up switching regulator controller from the ABLIC S-8337 series. It operates with a minimum supply voltage of 1.8 V and supports an internal oscillation frequency up to 1.133 MHz via the ROSC pin. The device features adjustable maximum duty ratio through the RDuty pin and allows phase compensation adjustment via the CC pin. It includes under-voltage lockout (UVLO) and timer latch short-circuit protection. The component is housed in an 8-SMD, flat lead 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
• Features programmable switching frequency and adjustable maximum duty ratio
• Includes built-in under-voltage lockout and short-circuit protection circuits

Applications

• Power supply for LCD modules
• Portable electronic systems operating on low voltage
• Step-up DC-DC converter control circuits

Procurement Notes

Verify the specific suffix 'ADB' against official ABLIC documentation to confirm pinout and electrical characteristics. Ensure the component meets RoHS compliance requirements for your assembly process. Confirm availability status as some variants may be marked not recommended for new designs. Cross-reference the manufacturer part number with distributor catalogs to ensure accurate sourcing.

Selection Notes

Select this controller when designing boost converters requiring high-frequency operation up to 1.2 MHz. Choose this model if the application demands a low minimum operating voltage of 1.8 V. Consider this part for designs needing adjustable duty cycle limits via external resistors. Verify that the 8-SMD package fits the available PCB space constraints.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8337 variant specifically offers adjustable maximum duty ratios, unlike the fixed-duty S-8338 series. These devices are designed for compact power management solutions in battery-operated equipment.

Replacement Considerations

S-8337AACB-P8T1G

FAQ

How is the switching frequency determined?

The internal oscillation frequency can be set up to 1.133 MHz by connecting a resistor to the ROSC pin.

What protection features are included?

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