The ZXRE160 from Diodes Incorporated is a 5-terminal adjustable shunt regulator with a 0.6 V feedback reference — roughly half the reference voltage of conventional TL431-class (1.24 V) or 2.5 V shunt references. This enables closed-loop regulation of sub-1 V supply rails without external resistive dividers that would degrade accuracy and transient response.

Why does the 0.6 V reference matter?

In an isolated DC-DC converter, the minimum regulated output voltage is bounded by the shunt reference voltage. With a 1.24 V reference, regulating a 0.8 V core rail requires an external divider that attenuates the feedback signal, reducing loop gain and slowing transient response. The ZXRE160's 0.6 V FB pin eliminates that divider — the output connects directly to the feedback node for rails ≥0.6 V, preserving full loop bandwidth and regulation accuracy.

What are the key electrical ratings?

What tolerance grades and packages are available?

Standard grade: ±1% initial tolerance. A grade (ZXRE160A): ±0.5%. Package options: SC-70-5 (SOT-353), TSOT-25, and DFN1520 (X2-DFN1520-6). All variants are lead-free, halogen-free, antimony-free, and RoHS compliant — classified as Diodes "Green" devices. Not AEC-Q qualified; intended for commercial and industrial applications.

What are typical application circuits?

Isolated low-voltage DC-DC converter feedback, point-of-load regulators for microprocessor/DSP/PLD core voltages, low-cost LDO regulators using the open-collector output as a pass-transistor driver, and any design needing an adjustable precision shunt reference with a setpoint below 1.24 V.