TJ4310GDP-ADJ

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The TJ4310GDP-ADJ is a 1A ultra-low dropout linear regulator in SOP8-PP package. It operates from 2.5V to 5.5V input, providing adjustable output voltage via external resistors. Key features include programmable soft-start, auto discharge, and power OK signal. Electrical characteristics specify line regulation of 0.25%/V and load regulation of 0.10%. Dropout voltage ranges from 40mV at 100mA to 550mV at 1A. Ground current is typically 0.20mA at 1A load.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Ultra-low dropout performance for efficient low-voltage operation
• Programmable soft-start function to control in-rush current
• Integrated power good indication with open-drain output
• Auto discharge capability for rapid output capacitor release

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Microprocessor power supplies
• Battery powered equipment
• LCD TVs and SETTOP Boxes
• Motherboards and Graphic Cards

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific SOP8-PP package marking 'TJ4310G' matches the required footprint. Confirm halogen-free material class 'G' compliance if environmental standards apply. Ensure input capacitors are placed closely to VIN pin to prevent sagging during high transient loads.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this part when adjustable output voltage is required alongside 1A continuous current capability. The SOP8-PP package offers thermal advantages over standard SOP8. Verify that the application requires an enable pin and power good signal, as these are integrated features not present in all similar regulators.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

Part of the TJ4310 series developed on CMOS process technology. Designed for applications requiring fast response to step changes in load. The series includes fixed voltage options (1.0V to 3.3V) and other packages like SOT-89-5L and DFN2X3-8L.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct substitutes include TJ4310GD-ADJ (SOP8) and TJ4310GF-ADJ (SOT-89-5L). Check thermal resistance differences between packages. Fixed voltage versions like TJ4310GDP-1.2 may replace if specific voltage is needed without external resistors.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

How is the output voltage adjusted?

Output voltage is set using two external resistors connected between VOUT, ADJ, and GND pins according to the formula R2 = R1 * (VOUT/0.6 - 1).

What is the purpose of the SS pin?

The SS pin connects to a capacitor to ground to program the soft-start time, suppressing in-rush current during startup.

How does the auto discharge function work?

When the EN pin goes low, an internal switch activates to rapidly discharge the output capacitor, reducing shutdown time.