RS6903YF5

Overview

The RS6903YF5 is a non-regulated charge pump voltage inverter manufactured by Runic Technology. It generates negative output voltages from input supplies ranging from 1.5V to 5.5V. The device delivers a maximum output current of 60mA with a typical conversion efficiency exceeding 85%. Key electrical parameters include an output voltage range of -5.5V to -1.5V, a static current (Iq) of 110uA, and an output resistance of 9Ω. It operates at a fixed switching frequency of 50kHz and features soft-start functionality. The component is housed in an SOT-23-5 package and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Inverts positive input supply voltage to generate negative output
• Integrates active Schottky diodes for load startup without external discrete components
• Requires only three small ceramic capacitors for complete DC/DC inversion circuitry
• Provides high conversion efficiency across wide output current ranges

Applications

• LCD bias voltage generation
• GaAs bias for RF power amplifiers
• Sensor power supplies in portable instruments
• Dual-polarity amplifier power systems

Procurement Notes

Verify the specific suffix 'YF5' against the manufacturer's official datasheet to confirm pinout compatibility and thermal characteristics. Ensure that the required external capacitor values align with the 3.3μF recommendation for stable operation within the specified voltage and temperature ranges. Confirm RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select this component when a compact solution is needed to create negative rails from low-voltage single-supply systems. The SOT-23-5 package suits space-constrained designs. Consider the 110μA static current for battery-powered applications where standby consumption matters. Verify that the 60mA current limit meets the peak demands of the target load circuit.

Part Context

This part belongs to the RS6903 series of charge pump inverters by Runic Technology. These devices are designed to replace traditional diode-based inversion circuits, reducing board space and component count. The series targets portable electronics requiring dual-polarity power from a single low-voltage source.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.