S-8337ABHC-P8T1G

Overview

The S-8337ABHC-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 supports an internal oscillation frequency up to 1.134 MHz via an external resistor on the ROSC pin. The device utilizes PWM control with a maximum duty ratio adjustable through the RDuty pin. It features an under-voltage lockout circuit and a timer latch short-circuit protection mechanism. The component is housed in an 8-SON package measuring 2.9 x 2.8 mm.

Feature Summary

• Integrates under-voltage lockout and timer latch short-circuit protection for enhanced operational safety.
• Allows flexible configuration of oscillation frequency and maximum PWM duty ratio via external resistors.
• Supports phase compensation and gain adjustment using external resistor and capacitor values.

Applications

• Power supply units for LCD displays
• Portable electronic systems operating on low voltage sources

Procurement Notes

Verify the specific suffix codes against the official datasheet to ensure correct electrical characteristics and packaging options. Confirm RoHS compliance status and environmental declarations prior to integration. Check for any Product Change Notifications (PCN) regarding material or manufacturing process updates. Ensure the selected variant matches the required operating temperature range and package dimensions for your PCB layout.

Selection Notes

Select this controller when designing boost converters requiring low minimum operating voltages down to 1.8 V. Consider the adjustable frequency and duty ratio capabilities if custom output voltage or ripple specifications are needed. Evaluate the need for external phase compensation components to ensure stability under varying load conditions. Verify that the 8-SON package fits within the available board space constraints.

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 input voltage requirements. The S-8337 variant specifically allows user-defined maximum duty ratios, distinguishing it from the fixed-duty S-8338 series. It is part of ABLIC's portfolio of CMOS power management integrated circuits.

Replacement Considerations

Consult the manufacturer's selection guide for direct functional equivalents within the S-8337 family. Verify pin compatibility and electrical parameters before substituting with other manufacturers' boost controllers. Ensure any replacement maintains the required 1.8 V minimum operating voltage and PWM control interface.

FAQ

How is the internal 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 includes an under-voltage lockout circuit (UVLO) and a timer latch short-circuit protection circuit.

Can the maximum duty ratio be customized?

Yes, the maximum duty ratio of the PWM control can be controlled by the resistor connected to the RDuty pin.