S-1701U3430-U5T1G

Overview

The S-1701U3430-U5T1G is a dual-output low-dropout (LDO) voltage regulator from the ABLIC S-1701 series, housed in an SOT-89-5 surface-mount package. It provides two fixed positive output voltages: 3.4 V at a maximum current of 400 mA and 3.0 V at a maximum current of 260 mA. The device features a typical quiescent current of 85 µA and operates within an input voltage range of 2.0 V to 6.5 V. It maintains a maximum dropout voltage of 210 mV at 100 mA, with line regulation of 0.2 %/V and load regulation of 40 mV. The unit supports power dissipation up to 1 W and functions reliably across a temperature range of -40 °C to +85 °C.

Feature Summary

• Dual independent fixed output channels providing 3.4 V and 3.0 V simultaneously
• Ultra-low quiescent current consumption for extended battery life
• High output current capability with stable regulation under varying loads
• Compact SOT-89-5 package design suitable for space-constrained applications

Applications

• Battery-powered portable electronic devices requiring multiple voltage rails
• Mobile communication equipment needing efficient power management
• Embedded systems utilizing microcontrollers with distinct core and I/O voltage requirements
• Consumer electronics with strict power consumption constraints

Procurement Notes

Verify the specific part number suffix against official ABLIC documentation to confirm pinout compatibility and thermal characteristics. Ensure the ordering quantity aligns with manufacturer reel specifications. Confirm RoHS compliance status through the latest datasheet revision. Cross-reference the manufacturer's date code to ensure component freshness. Validate that the supply chain source is authorized to prevent counterfeit risks.

Selection Notes

Select this component when simultaneous 3.4 V and 3.0 V supplies are required from a single input rail. Consider the 400 mA and 260 mA current limits to ensure adequate headroom for peak load conditions. Evaluate the thermal performance in the final enclosure, as the SOT-89-5 package dissipates heat effectively but requires proper PCB copper area for optimal operation. Compare dropout voltage specifications against the minimum available input voltage to maintain regulation.

Part Context

This device belongs to the ABLIC S-1701 series of low-dropout regulators, designed for high efficiency and low noise in portable applications. The series offers various fixed output combinations and packages, including SOT-89-5 and SOT-23-5. These regulators are engineered for automotive and industrial environments, featuring robust protection mechanisms and wide operating temperature ranges. The S-1701U3430 variant specifically targets applications needing asymmetric dual outputs.

Replacement Considerations

Direct substitutes include other ABLIC S-1701 series parts with compatible output voltages and current ratings, such as the S-1701B3024-U5T1G or S-1701R1815-U5T1G, provided the voltage levels match system requirements. Verify pin-to-pin compatibility before substitution. Alternative manufacturers may offer similar dual-output LDOs, but electrical parameters and thermal characteristics must be carefully compared.